var path = require('path');
var utils = require('bbhverse');
var any = utils.any;              
var Tasq = utils.Tasq
var statuslog = utils.Traq
var Traq = utils.Traq
Tasq.addlistener(statuslog.statuslog) 
var cli = require('./cliverse')
var nodeShellExec = cli.nodeShellExec;
var chalk = require('chalk')


const BUILD_VERSION = '[VI]Version: {version} - built on {date}[/VI]';
function getVersion() {  return BUILD_VERSION; }
console.log(getVersion())

// 'use strict';

// PB : TODO -- make sure folder context is proper coz we can now run elxr from anywhere.

// PB : TODO -- 
// runas bypass non elevated tasks when we request privelege
// runas message is always error needs to be fixed.
// runas wait needs to be parallelized.
// suppress elevation check error messages
// support runas lauched directly from shell.
// pass in environment in hta to shellexecute.

const { existsSync } = require('fs');
const fs = require('fs')

const cliargs = utils.cliargs;
const processedArgs = cliargs(process.argv.slice(2));
console.dir(processedArgs)
var globSync = require('glob').sync;

const { isMaster } = require('cluster');

var ENV = Object.assign({}, process.env); // Shallow clone it.

var getShellTask = (command, args, options)=>{
  return ()=>{ 
      var p = nodeShellExec.apply(null, [command, args, Object.assign({
          inherit : true, shell: true, env : ENV, title : `${command} ${args}` 
        }, options)
      ])
      if(options.ignorefailures){
        return p.catch(e=>{ 
          // Ignore. Not a major error.
        })
      }
      else return p;
  }
}

var getPullCmd = (repo)=>{
  // console.log(useGitPull)

  var pullCmd = [ gitInstallDir
    , ['-c', 'branch=`git rev-parse --abbrev-ref HEAD`;for i in `git remote`; do git pull $i $branch; done;']
    , { cwd : repo, title : 'pull all origins for ' + repo }]
  // var pullCmd = ['pullall', [], { cwd : repo }]
  if(useGitPull) pullCmd = ['git', ['pull'], {
    inherit : true, shell: true, 
    cwd : instanceroot + '/' + repo
    // , env: process.env
    , runas : processedArgs.runas
    , title : `git pull ${repo}`
  }]
  return pullCmd
}

var performPull = (repo) => {
  if(existsSync(instanceroot + '/' + repo)) {
    console.log('pulling ' + instanceroot + '/' + repo)
    return nodeShellExec.apply(null, getPullCmd(repo)).then(()=>{ 
        if(__isElevated) {
          fs.writeFileSync('run.log', ', ' + JSON.stringify({ repo, success:true}), {'flag':'a+'} )
        }
        else statuslog.statuslog(null, repo)
        return true;
      })
      .catch((e)=>{ 
        e.repo = repo;
        if(__isElevated) {
          fs.writeFileSync('run.log', ', ' + JSON.stringify(e), {'flag':'a+'} )
        }
        else statuslog.statuslog(e); console.error(e)
      }) 
  }
  else {
    console.log('cloning ' + repo)
    // PB : TODO -- detect if a clonable repo exists in currentGitAuthUser
    return nodeShellExec('git', ['clone', '-c', 'core.symlinks=true', defaultRepoServer + `/${defaultRepoOwner}/` + repo + '.git'],
    {
      inherit : true, shell: true, 
        env: process.env
      , runas : processedArgs.runas
    }).catch((e)=>{ 
      throw e;
    }).then(()=>{

      return nodeShellExec('git', ['config', '--replace-all' , 'core.symlinks', true],
      {
        inherit : true, shell: true, 
          env: process.env
        , cwd : repo
        , runas : processedArgs.runas
        , title : `git core.symlinks --replace-all true for ${defaultRepoServer + `/${defaultRepoOwner}/` + repo + '.git'}`
      })
      .then(()=>{
        if(__isElevated) {
          fs.writeFileSync('run.log', ', ' + JSON.stringify({ repo, success:true}), {'flag':'a+'} )
        }
        else statuslog.statuslog(null, repo)
      })
      .catch((e)=>{
        e.repo = repo;
        if(__isElevated) {
          fs.writeFileSync('run.log', ', ' + JSON.stringify(e), {'flag':'a+'} )
        }
        else statuslog.statuslog(e);
      })
    })
    .catch(e=>{ 
      e.repo = repo;
      if(__isElevated) {
        fs.writeFileSync('run.log', ', ' + JSON.stringify(e), {'flag':'a+'} )
      }
      else statuslog.statuslog(e);
    })
  }
}

// PB : TODO -- If we are run from an elevated shell it never moves forward and simply exits.
// -- Currently workaround is to always run from a non-elevated shell.
var __isElevated = null; // We assume non-Elevated until someone evaluates and sets this variable.
var acquireElevationState = ()=>{
    if(__isElevated === null) {
      return nodeShellExec( "fsutil", ["dirty", "query", "C:"], { 
        inherit : true
        // , shell: true
          , stdio: 'ignore'
          , env: process.env
          , title : `check privileged execution mode using "fsutil dirty query C:"`
      }).then((exitcode)=>{    
        console.log('Elevated')
        __isElevated = true;
        return true;
      }).catch(()=>{
        __isElevated = false;
        console.log('Not Elevated');
        return false;
      });
    }
    else return Promise.resolve(__isElevated);
}


var repomanifest = null;
var currentGitAuthUser ; // nodeShellExec('git', ['config', 'user.email']) ... PB : TODO-- get the current gittea username 
var defaultRepoOwner = 'chess'; 
var elevatedRunasRepos = null
var gitRepos = null
var defaultRepoServer = null

// grep -qxF 'alias elxr="node elxr/index.js"'  ~/.bash_profile || echo 'alias elxr="node elxr/index.js"' >> ~/.bash_profile


// nodeShellExec('echo', ['elxr'], { inherit : true}) //, {stdio: "inherit"}

var dbForLabel = function(label){
  var dbsForLabel = {
      devmysql : 'mysql'
    , development : 'mssql'
    , production : 'mssql'
  }
  return dbsForLabel[label] || 'mysql'
}

// SAM : TODO Use nodeshellexec where to detect git installation dir
var gitInstallDir = "C:\\Program Files\\Git\\bin\\sh.exe"
// var gitInstallDir = "G:\\Installed\\Git\\bin\\sh.exe"
// Relevant git repos
// var repomanifest = require('../'+repomanifest.instanceName+'-config-'+ nodeenv +'/repo-manifest')()
var exludeMergeRepos = [];
var useGitPull = processedArgs.useGitPull || false;
var configPromise = null

// elxr cli operations
var op = {
    'h' : ()=>{ console.log(elxr.info()); return '-h' }
  , 'undefined' : ()=>{ return op.h(); }
  , 'reset' : ()=>{
    
    // Reset NPM packages semver so major versions can be updated.
    
    const fs = require('fs')
    const wipeDependencies = (__package) => {
      const file  = fs.readFileSync(__package + '/package.json')
      const content = JSON.parse(file)
      for (var devDep in content.devDependencies) {
        if (content.devDependencies[devDep].match(/\W+\d+.\d+.\d+-?((alpha|beta|rc)?.\d+)?/g)) {
          content.devDependencies[devDep] = '*';
        }
      }
      for (var dep in content.dependencies) {
        if (content.dependencies[dep].match(/\W+\d+.\d+.\d+-?((alpha|beta|rc)?.\d+)?/g)) {
          content.dependencies[dep] = '*';
        }
      }
      fs.writeFileSync(__package + '/package.json', JSON.stringify(content))
    }

    var repos = ['client'];
    // repos = gitRepos;
    repos.forEach(wipeDependencies)
    // if (require.main === module) {
    // } else {
    //   module.exports = wipeDependencies
    // }

  }
  , 'upgrade' : ()=>{
    console.log('upgrade.......')
    var tasks = [
      ()=>{ 
        var p = nodeShellExec('npm', ['i', '-g', 'npm-upgrade'], {
          inherit : true, shell: true
              , env: process.env
        }).catch((e)=>{ console.error(e) }) 
        p.position = 1;
        console.log('One')
        return p;
      }
      , ()=>{ 
        var p = nodeShellExec('npm', ['cache', 'clean', '-f'], {
          inherit : true, shell: true
              , env: process.env
        }).catch((e)=>{ console.error(e) }) 
      
        p.position = 2;
        console.log('Two')
        return p;
      }
      , ()=>{ 
        var p = nodeShellExec('npm', ['install', '-g', 'n'], {
          inherit : true, shell: true
              , env: process.env
        }).catch((e)=>{ console.error(e) }) 
        p.position = 3;
        console.log('Three')
        return p;
      }
      , ()=>{ 
        var p = nodeShellExec('n', ['latest'], {
          inherit : true, shell: true
              , env: process.env
        }).catch((e)=>{ console.error(e) }) 
        p.position = 4;
        console.log('Four')
        return p;
      }
    ]
    any(tasks)
    console.log('.......done')
    console.log('Running exlr upgrade in : ' + path.dirname(__dirname))
    console.log('Currently only upgrades ember : ' + path.dirname(__dirname));
    console.info('Uninstalling existing ember globally') ;
    var step1 = nodeShellExec('cmd', ['/c', 'npm', 'uninstall', '-g', 'ember-cli'], {
        stdio: ['pipe', process.stdout, process.stderr],
        inherit : true,
        shell: true,
        cwd : path.dirname(__dirname),
        env: env
      })
      step1.on('close', ()=>{
        console.info('Installing ember globally') ;
        var step2 = nodeShellExec('cmd', ['/c', 'npm', 'install', '-g', 'ember-cli'], {
          stdio: ['pipe', process.stdout, process.stderr],
          inherit : true,
          shell: true,
          cwd : path.dirname(__dirname),
          env: env
        })
        
        step2.on('close', ()=>{
          nodeShellExec('cmd', ['/c', 'ember', '--version'], {
            stdio: ['pipe', process.stdout, process.stderr],
            inherit : true,
            shell: true,
            cwd : path.dirname(__dirname),
            env: env
          })
        })
      })
    }
  , 'runas' : ()=>{
    console.log('Testing Elevation')

    if(__isElevated){
      try { 
        op[ processedArgs.label || processedArgs._[0] || 'h']()
      }
      catch(e){ 
        console.error('Error Invalid command : ' + e) 
        fs.writeFileSync('run.done', 'error')
      }
      finally {
      }
    }
    else {
      console.log('Requesting Elevated Privileges');
      // Wait for the runas to complete before we read it.
      try {
        fs.unlinkSync('run.done')
        fs.unlinkSync('run.log')
      }
      catch(e) { } //Ignore 
      
      // Find node path to send to hta.
      return nodeShellExec('where', ['node']).then(r => {
        var namedArgs = [];
        console.log('result : ' + JSON.stringify(r))
        Object.keys(processedArgs).forEach((v)=>{ v!='_' ? namedArgs.push('--'+v+'='+processedArgs[v]) : null; })
        // PB : TODO -- Convert all the cli args back to string.
        var args = [__dirname + '/windowselevate.hta'].concat(processedArgs._).concat(namedArgs.join(' ')); args.push('--runas=self');
        args.push('--nodepath='+r[r.length-1])
        if(!processedArgs.node_env) args.push('--node_env='+ENV.NODE_ENV)
        if(processedArgs.debug) args.push('--debug=true') // Enable to debug elevated..

        return nodeShellExec('MSHTA', [`"${args.join('" "')}"`]
          , {
              inherit : true
            , shell: true
            , env: ENV
            , runas : 'self'
            , title : `runas`
          }
        ).then(()=>{
          // runas returned.
          try {
            // PB : TODO -- Log is comma prefixed. Needs to be proper JSON.
            var runaslog = JSON.parse('[ { "success" : true, "result" : "started"}' + fs.readFileSync('run.log', { flags : 'a+'}) + ']');
            runaslog.forEach((logEntry)=>{
              statuslog.statuslog(logEntry.success ? null : logEntry, logEntry)
              logEntry.success ? (console.log(['success :' + logEntry.result]), console.log((logEntry.messages || []).join(' '))) : (console.error(['error :' + logEntry.result]), console.error((logEntry.messages || []).join(' ')))
            })  
          }
          catch(e){
            // We must have a runas log
            statuslog.statuslog(e)
            console.error('Run log error probably was not created by runas : ' + e)
          }
        })
        .catch(err => console.error('Elevation failed : ' + err));
      })

    }
  }
  , 'push' : ()=>{
    if(!processedArgs._[1]) { console.error('push all not supported. Specify repo name'); return }
    // init remote bare from local
    // pushandinitremotebare
    // https://www.jeffgeerling.com/blogs/jeff-geerling/push-your-git-repositories
    // connect to repo server -- net use 172.16.0.27 
    // cd 172.16.0.27/repos/
    // mkdir repo.git
    // cd repo.git
    // git init --bare
    // cd localrepo
    // git remote rename origin githubclone
    // git remote add origin //172.16.0.27/repos/repo.git
    // git push origin master

    var repo = processedArgs._[1];
    
    var sequentialTaskShellCommands = [];
    if(!existsSync(`Z:/${repo}.git`)){
      sequentialTaskShellCommands = [
        // ['net', ['use', 'Z:', defaultRepoServer.replace('/','\\')], {
        //   inherit : true, shell: true
        //   , env: process.env
        // }]
          ['pwd', { cwd : 'Z:', inherit : true}]
        , ['mkdir', [`${repo}.git`], {
            cwd : `Z:`
            , inherit : true, shell: true
            , env: process.env
        }]
        , ['pwd', { cwd : `Z:/${repo}.git`, inherit : true}]
        , ['git', ['init', '--bare'], { cwd : `Z:/${repo}.git`
            , inherit : true, shell: true
            , env: process.env
        }]
        // PB : TODO -- Do this conditionally only...
        , ['git', ['remote', 'rename', 'origin', 'githubclone'], { cwd : `${repo}`}, (err)=>{
          console.log('Ignoring origin rename error : ' + err); return true; //return true to continue.
        } ] // PB ; Todo -- new repositories created locally will not have origin. Handle this failure.
        , ['git', ['remote', 'add', 'origin', `${defaultRepoServer}/${repo}.git`], { cwd : `${repo}`}]
        // PB : TODO -- If threre is a gitbubclone origin 
          // Set the master to pull from the local repo.
      ]
      if(!existsSync(`Z:`)){
        sequentialTaskShellCommands.splice(0,0, ['net', ['use', 'Z:', defaultRepoServer.replace(/\//gm,'\\')], {
          inherit : true, shell: true
          , env: process.env
        }])
        console.warn('Adding network drive z: for repo server. ' + sequentialTaskShellCommands[0])
        // throw 'done'
      }
    }
    
    sequentialTaskShellCommands.push(['git', ['push', 'origin', 'master'], { cwd : `${repo}`}])
    // console.dir(sequentialTaskShellCommands);

    var tasks = [];
    sequentialTaskShellCommands.forEach(shellcmd => {
      // console.log(shellcmd)
      tasks.push(()=>{ 
        
        var p = nodeShellExec.apply(null, shellcmd.slice(0,3)).catch((e)=>{ if(shellcmd[3]) { return shellcmd[3]() } else { console.error(e);}  })
        return p; 
      })
    })
    any(tasks);

  }
  , 'is-git-repo' : (dir)=>{
    return nodeShellExec('git', ['-C', dir.name, 'rev-parse'], { stdio : 'ignore'})
  }
  , 'set-url' : (remotename, url) => {
    var pushable = processedArgs.pushable || false;
    remotename = remotename || processedArgs._[1]
    url = url || processedArgs._[2]
    var serial_perform_git_seturl = (repo)=>{
      var options = {  cwd : repo }
      // console.log(repo)
      if(pushable) {
        return [
          ['git', ['remote', 'set-url', remotename, url + '/' + repo], {  cwd : repo }]
        ]
      }
      else {
        console.error('not supported for non-pushable')
      }

    }
    var x = (args)=>{
      return ()=>{
        // console.log(args)
        return nodeShellExec.apply(null, args)
      }
      // return Promise.resolve(true)
    }
    var perform_git_seturl = (dir)=>{
      op['is-git-repo'](dir).then((code)=>{
        any( serial_perform_git_seturl(dir.name).map(x) )                        
      }).catch((e)=>{
        // console.log('Failed : ' + dir.name)
      })
    }

    const { readdir } = require("fs").promises

    const dirs = async (perform, path) => {
      for (const dir of await readdir(path || process.cwd(), { withFileTypes: true })) {
        if (dir.isDirectory()) perform(dir)
      }
    }

    dirs( perform_git_seturl)
  }
  , 'add' : (remotename, url, branch) => {
    var pushable = processedArgs.pushable || false;
    remotename = remotename || processedArgs._[1]
    url = url || processedArgs._[2]
    branch = branch || processedArgs._[3]
    var serial_perform_git_add = (repo)=>{
      var options = {  cwd : repo }
      // console.log(repo)
      if(pushable) {
        return [
          ['git', ['remote', 'add', remotename, url + '/' + repo], {  cwd : repo }]
          , ['git', ['pull', remotename, branch], {  cwd : repo }]
          , ['git', ['branch', `--set-upstream-to=${remotename}/${branch}`, branch], {  cwd : repo }]
        ]
      }
      else {

        return [
          ['git', ['remote', 'add', remotename, url + '/' + repo], {  cwd : repo }]
          , ['git', ['remote', `set-url`, '--push', remotename, 'no-pushing'], {  cwd : repo }]
          , ['git', ['pull', remotename, branch], {  cwd : repo }]
          , ['git', ['branch', `--set-upstream-to=${remotename}/${branch}`, branch], {  cwd : repo }]
        ]
      }

    }
    var x = (args)=>{
      return ()=>{
        // console.log(args)
        return nodeShellExec.apply(null, args)
      }
      // return Promise.resolve(true)
    }
    var perform_git_add = (dir)=>{
      op['is-git-repo'](dir).then((code)=>{
        // console.log(code)
        if(code) {
          nodeShellExec('git',['remote', 'get-url', remotename], { cwd : dir.name, stdio : 'ignore' }).then(()=>{
            console.log('skipped : ' + dir.name + ', reason : A remote with same name already exists.')
          })
          .catch((e)=>{
            any( serial_perform_git_add(dir.name).map(x) )            
          })
        }
        // else console.log('Skipped : Not a Git Repo : ' + dir.name)
      }).catch((e)=>{
        // console.log('Failed : ' + dir.name)
      })
    }

    const { readdir } = require("fs").promises

    const dirs = async (perform, path) => {
      for (const dir of await readdir(path || process.cwd(), { withFileTypes: true })) {
        if (dir.isDirectory()) perform(dir)
      }
    }

    dirs(perform_git_add)
  }
  , 'remove' : (remotename) => {
    remotename = remotename || processedArgs._[1]
    var serial_perform_git_remove = (repo)=>{
      var options = {  cwd : repo }
      // console.log(repo)
      return [
        ['git', ['remote', 'remove', remotename], {  cwd : repo }]
      ]
    }
    var x = (args)=>{
      return ()=>{
        // console.log(args)
        return nodeShellExec.apply(null, args)
      }
      // return Promise.resolve(true)
    }
    var perform_git_remove = (dir)=>{
      op['is-git-repo'](dir).then((code)=>{
        // console.log(code)
        if(code) {
          nodeShellExec('git',['remote', 'get-url', remotename], { cwd : dir.name, stdio : 'ignore' }).then(()=>{
            any( serial_perform_git_remove(dir.name).map(x) )            
          })
          .catch((e)=>{
            console.log('skipped : ' + dir.name + ', reason : No remote named origin')
          })
        }
        // else console.log('Skipped : Not a Git Repo : ' + dir.name)
      }).catch((e)=>{
        // console.log('Failed : ' + dir.name)
      })
    }

    const { readdir } = require("fs").promises

    const dirs = async (perform, path) => {
      for (const dir of await readdir(path || process.cwd(), { withFileTypes: true })) {
        if (dir.isDirectory()) perform(dir)
      }
    }

    dirs(perform_git_remove)
  }
  , 'init-gitea' : (user) => {
    user = user || processedArgs._[1]
    if(!user) throw 'User name required'
    var serial_perform_init_gitea = (repo)=>{
      var options = {  cwd : repo }
      // console.log(repo)
      return [
        ['git', ['remote', 'add', 'chess', `${defaultRepoServer}/${user}/${repo}.git`], {  cwd : repo }]
      , ['git', ['remote', 'set-url', '--push', 'chess', 'no-pushing'], {  cwd : repo }]
      , ['git', ['remote', 'set-url', 'origin', `${defaultRepoServer}/${user}/${repo}.git`], {  cwd : repo }]
    ]}
    var x = (args)=>{
      return ()=>{
        // console.log(args)
        return nodeShellExec.apply(null, args)
      }
      // return Promise.resolve(true)
    }
    var perform_init_gitea = (dir)=>{
      op['is-git-repo'](dir).then((code)=>{
        // console.log(code)
        if(code) {
          nodeShellExec('git',['remote', 'get-url', 'chess'], { cwd : dir.name, stdio : 'ignore' }).then(()=>{
            console.log('skipped : ' + dir.name + ', reason : Already has remote chess ')
          })
          .catch((e)=>{
            any( serial_perform_init_gitea(dir.name).map(x) )            
          })
        }
        // else console.log('Skipped : Not a Git Repo : ' + dir.name)
      }).catch((e)=>{
        // console.log('Failed : ' + dir.name)
      })
    }

    const { readdir } = require("fs").promises

    const dirs = async (perform, path) => {
      for (const dir of await readdir(path || process.cwd(), { withFileTypes: true })) {
        if (dir.isDirectory()) perform(dir)
      }
    }

    dirs(perform_init_gitea)
  }
  , 'syncmaster' : (label) => {
    // Usage :
    // elxr pull -- Defaults to run config
    
    var env = Object.assign({}, process.env); // Shallow clone it.
    // console.dir(env)
    console.log('Running exlr pull : ' + path.dirname(__dirname))
    
    if(!processedArgs.runas) gitRepos.forEach(performPull)
    if(__isElevated){
      return any(elevatedRunasRepos.map((repo)=>performPull(repo))).then(()=>{
        fs.writeFileSync('run.done', 'success')
      }).catch(()=>{
        fs.writeFileSync('run.done', 'error')
      })
    }
    else return op['runas']()
  }

  , 'pull' : (label) => {
    // Usage :
    // elxr pull -- Defaults to run config
    
    var env = Object.assign({}, process.env); // Shallow clone it.
    console.log('Running exlr pull : ' + path.dirname(__dirname))

    var useGitPull = processedArgs.useGitPull || false;

    if(__isElevated){
      return any(elevatedRunasRepos.map((repo)=>performPull(repo))).then(()=>{
        fs.writeFileSync('run.done', 'success')
        return true;
      }).catch(()=>{
        fs.writeFileSync('run.done', 'error')
      })
    }
    else {
      // PB : TODO -- Rename op['runas'] to 'elevate'
      return op['runas']().then(()=>{ return true; })
      .catch((e)=>{
        console.error(e)
      })
      .finally(()=>{
        if(!processedArgs.runas) {
          var pendingpulls = [];
          gitRepos.forEach( (r)=>{ pendingpulls.push(performPull(r)) } )
          return Promise.all(pendingpulls).then(results =>{
            return true;
          }).finally(Traq.finally)
        }
      })
    }
  }
  , 'isInstalled' : ()=>{
    return nodeShellExec('where', [processedArgs._[1]], { inherit : true} ).then(()=>{
      console.log(processedArgs._[1] + ' exists.')
      return true;
    });
  }
  , 'i' : ()=>{
    
    var tasks = []
    tasks.push(op['pull']);
    tasks.push( getShellTask.apply(null, ['rm', [instanceroot + '/run.js'], { ignorefailures : true} ] ) )
    tasks.push(op['use'])
    if(!__isElevated){ 
      tasks.push(op['npmi'])
    }

    // var tasksdefs = [
    //     ['elxr', ['pull']]
    //   , ['elxr', ['use', 'elixir']]
    //   , ['elxr', ['npmi']]
    // ]
    
    
    // tasksdefs.forEach(tasksdef=>{
    //   tasks.push( ()=> nodeShellExec.apply(null, tasksdef) )
    // })

    return any(tasks);
    
  }
  , 'npmi' : ()=>{
    var tasks = [];
    

    var npmbuildrepos = ['loopback-jsonapi-model-serializer']
    npmbuildrepos.forEach(repo => {
      tasks.push(()=>{ 
        return nodeShellExec('npm', ['i --force'], {
          inherit : true, shell: true
          , cwd : repo
          , env: process.env
          , title : `npm i for ${repo}`
        }).catch((e)=>{ 
          console.error('Ignoring Benign Error'); console.error(e);
        }).then(()=>{
          console.log(`--------------------npm run build for ${repo}--------------------`)
          return nodeShellExec('npm', ['run build'], {
            inherit : true, shell: true
            , cwd : repo
            , env: process.env
            , title : `npm run build for ${repo}`
          }).then(Tasq.then).catch(Tasq.catch)
        }) 
      })
    })

    any(tasks).then(()=>{

      gitRepos.push('client/server');
      gitRepos = gitRepos.concat(elevatedRunasRepos);

      var rmtasks = []
      var repotasks = []
      gitRepos.forEach(repo => {

        rmtasks.push(()=>{
          console.log(`--------------------rm package-lock.json for ${repo}--------------------`)
          return nodeShellExec('rm', ['package-lock.json'], {
            inherit : true, shell: true
            , cwd : repo
            , env: process.env
            , title : `rm 'package-lock.json' for ${repo}`
          }).catch((e)=>{console.error(e)}) 
        })
        
        if( npmbuildrepos.indexOf(repo) < 0) {
          repotasks.push(
            ()=>{
                console.log(`--------------------npm i for ${repo}--------------------`)
                var p = nodeShellExec('npm', ['i --force'], {
                  inherit : true, shell: true
                  , cwd : repo
                  , env: process.env
                  , title : `npm i for ${repo}`
                }).then(Tasq.then).catch(Tasq.catch)
                return p; 
            }) 
        }
      })

      var bowerRepos = ['client']
      bowerRepos.forEach(repo => {
        repotasks.push(()=>{ 
          var p = nodeShellExec('bower', ['install'], {
            inherit : true, shell: true
            , cwd : repo
            , env: process.env
            , title : `bower i for ${repo}`
          }).then(Tasq.then).catch(Tasq.catch)
          return p; 
        })
      })

      return Promise.all(rmtasks).then(()=>any(repotasks));
    }).catch(e=>{
      
    }).finally(statuslog.finally)
    
  }
  , 'start' : (label)=>{ 
    console.log('Starting Elixir Server.');
    var env = Object.assign({}, process.env); // Shallow clone it.
    // console.dir(env)
    env.NODE_ENV = process.env.NODE_ENV || 'development';
    env.DEBUG = 'loopback:connector:' + dbForLabel(label)
    var cmd = env.NODE_ENV === 'development' ? 'nodemon' : 'node';
    // cmd = 'node'
    cmd = [cmd, ['--inspect=9228', 'elixir/server.js']] 
    var childPromise = nodeShellExec(...cmd, {
      // inherit : true,
      shell: true, 
      detached: true,
      stdio: 'ignore',
      cwd : 'elixir-server'
      , env: env
    })

    var child = childPromise.process;
    if (typeof child.pid !== 'undefined') {
      console.log(`started Elixir Server PID(${child.pid}) : NODE_ENV=${process.NODE_ENV} ${cmd}`);
      fs.writeFileSync('.elixir-server.elixir.server.pid', child.pid, {
        encoding: 'utf8'
      })
    }

    // nodeShellExec('node', ['--inspect=9226', ' bin/www'], {
    //   inherit : true, 
    //   shell: true, detached: true,
    //   cwd : 'qms/server',
    //   env: env,
    //   shell : true
    // })

    // nodeShellExec('ember', ['s'], {
    //   // inherit : true, 
    //   shell: true, detached: true,
    //   cwd : 'client/',
    //   env: env
    // })
    console.log('Starting Elixir Client Host.');
    var cmd = ['ember', ['s']]
    var childPromise = nodeShellExec(...cmd, {
    // var childPromise = nodeShellExec('node', ['--inspect=9227', './node_modules/.bin/ember', 's'], {
      // PB : TODO -- ember debugging.
      // inherit : true,
      shell: true,
      detached: true,
      stdio: 'ignore',
      cwd : 'client'
      , env: env
    })
    // .catch(e=>console.error(e))

    child = childPromise.process;
    if (typeof child.pid !== 'undefined') {
      console.log(`started Elixir Client Host PID(${child.pid}) : NODE_ENV=${process.NODE_ENV} ${cmd}`);
      fs.writeFileSync('.client.server.pid', child.pid, {
        encoding: 'utf8'
      })
    }

  }
  , 'stop' : (label)=>{ 
    const kill = require('tree-kill');

    var serverPid = fs.readFileSync('.elixir-server.elixir.server.pid', {
      encoding: 'utf8'
    })
    fs.unlinkSync('.elixir-server.elixir.server.pid')
    console.log(serverPid)
    kill(serverPid)      

    serverPid = fs.readFileSync('.client.server.pid', {
      encoding: 'utf8'
    })
    fs.unlinkSync('.client.server.pid')
    console.log(serverPid)
    kill(serverPid)   
  }
  , 'use' : ()=>{
    // use a certain named instance.
    //  Eg : 
      // 1) elxr use elixir
      // 2) elxr use cihsr
    // If environment is not specified defaults to development.
      // 1) NODE=test elxr use elixir

    /*// Steps
    1) Delete Config and Data symlinks
    2) Make Links for config ({{name}}-config-{{node_env}}) and data with the NODE_ENV specified or default to dev 
    3) Iterates all repos and pull all. 'git', ['pull', '--all'].
    4) Iterates all repos and checkout to the ENV specified. 'git', ['checkout', checkoutMap[runconfig.NODE_ENV] || runconfig.NODE_ENV]
    5) Iterates all repos and merge from source configured in mergeSource. 'git', ['merge', mergeSource],
    */
    var runconfig = { NODE_ENV : repomanifest.node_env }  
    try { runconfig = Object.assign(runconfig, require(instanceroot + '/run.js')) } catch(e) { }
    if((!processedArgs.runas || processedArgs.runas !== 'self') && 
      runconfig.NODE_ENV &&  runconfig.NODE_ENV === (repomanifest.node_env || runconfig.NODE_ENV) && 
      repomanifest.instanceName && runconfig.use === repomanifest.instanceName)  {
    
      console.log(`No change detected. Already using requested specs : ${runconfig.NODE_ENV} ${runconfig.use}`)
      if(processedArgs.runas) { fs.writeFileSync('run.done', 'success') }
      return
    }

    var tasks = [
      ()=>{
        if(existsSync('config')) {
          var p = nodeShellExec('rmdir', ['config'], {inherit : true, shell: true, env: process.env }
            ).catch((err)=>{ console.log('Ignoring benign error : ' + err); return true; })
          return p;
        }
        else return Promise.resolve(true);
      },
      ()=>{ 
        if(existsSync('data')) {
          var p = nodeShellExec('rmdir', ['data'], { inherit : true, shell: true, env: process.env }
            ).catch((err)=>{ console.log('Ignoring benign error : ' + err); return true; })
          return p;
        }
        else return Promise.resolve(true);
      },
    ];
    runconfig.NODE_ENV = process.env.NODE_ENV = process.env.NODE_ENV || runconfig.NODE_ENV || 'development';
    if(processedArgs._[1] && runconfig.use !== processedArgs._[1]) runconfig.use = processedArgs._[1];
    if(!runconfig.use) {  throw 'unspecifed use not allowed. Please specify chess instance name.' }
    // console.log(process.env.cwd)
    fs.writeFileSync(instanceroot + '/run.js', 'module.exports = ' + JSON.stringify(runconfig))
    
    // Maps an environment to a branch. Not required if the branch is appropriately named.
    var checkoutMap = { 'development' : 'master'}

    // cant use git checkout -b it fails with branch already exists.
    var performCheckout = (repo, branch)=>{
      if(!branch) return Promise.resolve({ 'skipped' : true })
      if(excludeCheckouts[repo]) return Promise.resolve({ 'skipped' : true })
      return nodeShellExec('git', ['checkout', branch || checkoutMap[runconfig.NODE_ENV] || runconfig.NODE_ENV], {
        // return nodeShellExec('git', ['switch', '-m', '-C', checkoutMap[runconfig.NODE_ENV] || runconfig.NODE_ENV], {
        // inherit : true, shell: true, 
        cwd : repo
        // , stdio : ignore // Use when we want to silcence output completely.
        , runas : processedArgs.runas
        , title : `git checkout ${branch ||checkoutMap[runconfig.NODE_ENV] || runconfig.NODE_ENV} for ${repo}`
      }).catch((e)=>{ console.error(e); return { error : true, message : repo} }) 
    }
    if(runconfig.NODE_ENV === 'development')  performCheckout = ()=>{ return Promise.resolve(true) }

    var performPullAll = (repo)=>{
      if(excludeCheckouts[repo]) return Promise.resolve({ 'skipped' : true })
      return nodeShellExec('git', ['pull', '--all'], {
        // inherit : true, shell: true, 
        cwd : repo
        , runas : processedArgs.runas
        , title : `git pull -all for ${checkoutMap[runconfig.NODE_ENV] || runconfig.NODE_ENV} ${repo}`
      }).catch((e)=>{ console.error(e); return { error : true, message : repo} }) 
    }

    var mergeSources = {
      'development' : null,
      'test' : 'master',
      'production' : 'master'
    }
    var excludeCheckouts = Object.assign(exludeMergeRepos)
    delete excludeCheckouts[`elixir-config-${runconfig.NODE_ENV}`]
    delete excludeCheckouts[`cihsr-config-${runconfig.NODE_ENV}`]

    var mergeSource = mergeSources[checkoutMap[runconfig.NODE_ENV] || runconfig.NODE_ENV]
    var performMerge = (repo)=>{
      if(exludeMergeRepos[repo]) return Promise.resolve({ 'skipped' : true })
      return nodeShellExec('git', ['merge', mergeSource], {
        inherit : true, shell: true, 
        cwd : repo
        , runas : processedArgs.runas
      }).catch((e)=>{ console.error(e) }) 
    }
    if(runconfig.NODE_ENV === 'development')  performMerge = ()=>{ return Promise.resolve(true) }

    any(tasks).then(()=>{
      if(!processedArgs.runas) return op['runas']() 

      tasks = [
        ()=>{ 
          // Use junctions to avoid npm package issues
          var p = nodeShellExec('mklink', ['/J', 'config', runconfig.use + '-config' + '-' + process.env.NODE_ENV ], {
            inherit : true, shell: true
            , env: process.env
          }).catch((e)=>{ console.error(e) }) 
          return p;
        }
      ];
      if(processedArgs._[1]) {   
        tasks = tasks.concat(
          [
            ()=>{ 
              var p = nodeShellExec('mklink', ['/J', 'data', runconfig.use + '-data'], {
                inherit : true, shell: true
                , env: process.env
              }).catch((e)=>{ console.error(e) }) 
              return p;
            }
          ]
        ) 
      }

      return any(tasks)
        //target is the env is we specify in elxr use command. Default is dev
        .then( //Switch to target branch
          () => any([ any(gitRepos.map((repo)=>performCheckout(repo, process.env.NODE_ENV || 'development')))
                    , any(elevatedRunasRepos.map((repo)=>performCheckout(repo, process.env.NODE_ENV || 'development')))]) )
        .then( //PULL from target branch
          () => any([ any(gitRepos.map((repo)=>performPullAll(repo))), any(elevatedRunasRepos.map((repo)=>performPullAll(repo)))]) )
        .then( //Switch to merge source branch
          () => any([ any(gitRepos.map((repo)=>performCheckout(repo, mergeSources[process.env.NODE_ENV || 'development'] )))
                    , any(elevatedRunasRepos.map((repo)=>performCheckout(repo, mergeSources[process.env.NODE_ENV || 'development'])))]) )  
        .then( //Pull on merge source branch
          () => any([ any(gitRepos.map((repo)=>performPullAll(repo))), any(elevatedRunasRepos.map((repo)=>performPullAll(repo)))]) )
        .then( //Switch to target branch
          () => any([ any(gitRepos.map((repo)=>performCheckout(repo, process.env.NODE_ENV || 'development')))
                    , any(elevatedRunasRepos.map((repo)=>performCheckout(repo, process.env.NODE_ENV || 'development')))]) )
        .then( //Merge source branch to target branch
          () => any([ any(gitRepos.map((repo)=>performMerge(repo))).catch(err=>{ console.error('error in performMerge ' + err)}) ,
                      any(elevatedRunasRepos.map((repo)=>performMerge(repo))).catch(err=>{ console.error('error in performMerge ' + err)})]) )
        .then( () => {
          // Move test config from dev.
          // if(process.env.NODE_ENV === 'test'){
          //   var devcfgreponame =  runconfig.use + '-config' + '-development'; 
          //   var testcfgreponame =  runconfig.use + '-config' + '-test';

          //   var testcfgdir = path.dirname(__dirname) + '/' +  testcfgreponame + '/'
          //   var devcfgdir = path.dirname(__dirname) + '/' +  devcfgreponame + '/' //eg (elxr/../elixir-config.development)
            
          //   return any([
          //       ()=>{ 
          //         return nodeShellExec('git', ['checkout', 'test'], {
          //           inherit : true, shell: true, 
          //           cwd : testcfgdir
          //           // , env: process.env
          //           , runas : processedArgs.runas
          //           , title : `git checkout test for ${testcfgreponame}`
          //         }).catch((e)=>{ console.error(e) })
          //       }
          //     , ()=> {
          //         return nodeShellExec('git', ['checkout', 'master'], {
          //           inherit : true, shell: true, 
          //           cwd : devcfgdir
          //           // , env: process.env
          //           , runas : processedArgs.runas
          //           , title : `git checkout master for ${devcfgreponame}`
          //         }).catch((e)=>{ console.error(e) })
          //       }
          //     , ()=> {
          //         globSync( '**/*.test.js', {cwd : devcfgdir}).map((filename) => {    
          //           console.log('File found : ' + devcfgdir + filename)       
          //           fs.copyFileSync(devcfgdir + filename, testcfgdir+ filename);
          //         })
          //         return nodeShellExec('git', ['checkout', 'test'], {
          //           inherit : true, shell: true, 
          //           cwd : devcfgdir
          //           // , env: process.env
          //           , runas : processedArgs.runas
          //           , title : `git checkout test for ${devcfgreponame}`
          //         }).catch((e)=>{ console.error(e) })
          //       }
          //   ])
          // } 
          // else {
            return Promise.resolve(true)
          // }
        })
      .then(()=>{
        fs.writeFileSync('run.done', 'success')
      }).catch(()=>{
        fs.writeFileSync('run.done', 'error')
      })
    }).catch(()=>{
      fs.writeFileSync('run.done', 'error')
    })

    // Antibiotic stewardship program.
    // 1st use is fine.
    // Max vials dispense
    // 2nd use Pharmacy needs justification Form.
    // Approval after a certain period of time.
  }
  , 'g' : ()=>{
    if(processedArgs.h) { 

      console.log('elxr g [modelname] => generate a model named [modelname]'); 
      console.log('elxr g => regenerate all known models'); 
      return 
    }
    // var child = nodeShellExec('mkdir', ['-p', label], { inherit : true} );
    // console.log('Starting directory: ' + process.cwd());
    // try {
    //     child = child.on('close', () => { process.chdir(label) } );
    //     console.log('New directory: ' + process.cwd()); 
    // }
    // catch (err) {
    //     console.log('chdir: ' + err);
    // }
    // child.on('close', function(){
        // var options = {
        //       shell : true 
        //     , inherit : true
        //     // , cwd : '' + process.cwd
        //     // , env : process.env
        // };
        // nodeShellExec('git', ['init'], { inherit : true});
      if(0){
        // PB : TODO -- Special google chrome profile for tests etc.
        nodeShellExec('pwd', { inherit : true});
        // /c/Program\ Files\ \(x86\)/Google/Chrome/Application/chrome.exe --user-data-dir=/c/chess/instances/elixir_01/data/Google/Chrome/User\ Data --profile-directory="chess"
        // "C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" --user-data-dir="C:\chess\instances\elixir_01\data\Google\Chrome\User Data" --profile-directory="chess" http://localhost:4200/admin/crud/create/item
        // "C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" --user-data-dir="C:\chess\instances\elixir_01\data\Google\Chrome\User Data" --profile-directory="chess" http://localhost:4200/tests/index.html?grep=loopback
        nodeShellExec("C:/Program Files (x86)/Google/Chrome/Application/chrome.exe", [
            "--profile-directory=Profile 1"
          , 'http://localhost:4200/tests/index.html?grep=model convert ember to loopback' + '&filter=none' /*+ '&filter=model convert ember to loopback'*/]);
        
      }
        // nodeShellExec('npm', ['init', '-y'], options);
        // nodeShellExec('npm', ['init', '-y'], options);
    // })

    var g = {
      'client' : ()=>{
        console.info('Creating new ember client named : ' + processedArgs._[2] ) ;
        var step1 = nodeShellExec('cmd', ['/c', 'ember', 'new', processedArgs._[2]], {
          stdio: ['pipe', process.stdout, process.stderr],
          inherit : true,
          shell: true,
          cwd : path.dirname(__dirname),
          env: env
        })
      },

      'modelr' : ()=>{
        var tasks = [
          ()=>{
            var p = nodeShellExec('"ember"', [
              'g'
              , 'modelr'
              , processedArgs._[2]], {
              inherit : true, shell: true, env: process.env
            }).then(()=>{
              console.log('Blueprint generation complete for : ' + processedArgs._[2])
              return true;
            }).catch((e)=>{ console.error(e) }) 
            return p;
          },
          ()=>{ 
            var chromePrefsFile = "C:\\chess\\instances\\elixir_01\\data\\Google\\Chrome\\User Data\\chess\\Preferences";
            var chromeprefs = fs.readFileSync(chromePrefsFile, { encoding: 'utf8' })
            chromeprefs = JSON.parse(chromeprefs)
            var previous = chromeprefs.download.default_directory;
            var parentDir = path.dirname(__dirname);
            chromeprefs.download.default_directory = parentDir + "\\client\\app\\templates\\components\\resource";
            fs.writeFileSync(chromePrefsFile, JSON.stringify(chromeprefs))
            // PB : TODO -- detect where chrome is installed.
            // PB : TODO -- set the download dir to the place where files are needed.
            var p = nodeShellExec('"C:/Program Files (x86)/Google/Chrome/Application/chrome.exe"', [
              '--user-data-dir="C:\\chess\\instances\\elixir_01\\data\\Google\\Chrome\\User Data"'
              , '--profile-directory="chess"'
              , 'http://localhost:4200/admin/crud/create/' + processedArgs._[2]], {
              inherit : true, shell: true
                  , env: process.env
            }).then(()=>{
              chromeprefs.download.default_directory = previous;
              fs.writeFileSync(chromePrefsFile, JSON.stringify(chromeprefs))
              return true;
            }).catch((e)=>{ console.error(e) }) 
            return p;
          }
          ,
          ()=>{
            console.log('Browser process should have closed here....')
            return true;
          }
        ]
        any(tasks)
        
      }

    }

    g[processedArgs._[1]]();
  }
}

var util = require('util')
var cliname = 'elxr';
var ver = '1.1'; 
var help = `# list of commands... please refer dveloper documentation for ${cliname}
  ${
    // util.inspect(
    [Object.keys(op)]
    // )
  }
`;

var elxr = {
  help(){
    return chalk.cyanBright(`
-------------------------------------------------------------------------------
  *** BBH Elixir ***  
-------------------------------------------------------------------------------
  elxr ${ver}
    A cli tool for chess
    ${help}
-------------------------------------------------------------------------------
  `)}
  , info(){
    return chalk.cyanBright(`
-------------------------------------------------------------------------------
  *** BBH Elixir ***  
-------------------------------------------------------------------------------
  elxr ${ver}
    A cli tool for chess
-------------------------------------------------------------------------------
  `)}
}

// The main elxr cli process
function elxrworker(hasconfig){
  
  return acquireElevationState().then(()=>{
    // Everything runs after this check is completed. Elevation occurs out of process when needed.
    gitRepos = repomanifest.repos

    // Repositiories that have symlinks that require elevated priviletes in windows to create symlinks
    elevatedRunasRepos = repomanifest.elevated
    // Repos that should excluded from merge for releases...
    exludeMergeRepos = repomanifest.exludeMergeRepos
    
    var env = Object.assign({}, process.env); // Shallow clone it.
    var __runcmd = function(label){
      return op[label] ? op[label]() : null;
    } 

    // mysqldump --add-drop-table --no-data -u root -p db_name | grep 'DROP TABLE' ) > drop_all_tables.sql
    // mysql -u root -p db_name < drop_all_tables.sql

    var mysql = '../xampp/mysql/bin/mysql'
    var mysqldump = '../xampp/mysql/bin/mysqldump'

    // --runas
    if(processedArgs.runas) {
      // Weve been asked to run in priviledged mode. Check if we already are privileged.
      __runcmd('runas')
    }
    else __runcmd(processedArgs.label || processedArgs._[0] || 'h');

  })
}

var getManifest = function(){
  // Once choices are made we need to load config according to those choices.
    
  // No trace of a previous run...
  // Default Config...
  return repomanifest = {

    // Default is public server only.
    reposervers : [ 'https://git.bbh.org.in' ]

    // All public repos are by default available.
    , repos : [
      'setup'
      , 'elxr'
      , 'loopback-connector-mysql'
      , 'loopback-jsonapi-model-serializer'
      , 'loopback-component-jsonapi'
      , 'ember-service-worker'
      , 'ember-service-worker-asset-cache'
      , 'ember-service-worker-cache-fallback'
      , 'ember-service-worker-index'
      , 'ember-sw-client-route'
    ]

    , elevated : [ ]
    , exludeMergeRepos : {}
    , instanceName : processedArgs._[1] || 'chess'
    // Runas windowshta clobbers and removes the NODE_ENV !!! We therefore pass it in.
    , node_env : (process.env.NODE_ENV && process.env.NODE_ENV.trim()) || processedArgs.node_env || 'development'
  };
}

function acquireChoices(){

  var hasconfig = false;
  console.warn(chalk.yellow(`
-------------------------------------------------------------------------------
Warning : Cannot locate your preferred configuration since it was not specified
You should fork the default chess configuration to customize and make it 
your own instance with a named config as 
  {{yourowninstancename}}-config-{{yourcurrentenvironment}} 
And then run this tool as follows
  NODE_ENV={{yourenvironment}} elxr i {{yourowninstancename}} 
OR
Run this tool with the following command to use a quick start default.
node elxr --default
OR
Choose the the option to create a new instance for you interactively.

We will run your choice of default or create your own at the next prompt.
-------------------------------------------------------------------------------
  `))
  var prompt = cli.prompt;
  return prompt.ask(`Choose an option :
      d) Install the default chess instance. 
          => elxr i chess node_env=development --default
      n) Create your custom new instance interactively
          => elxr i {{instanceName}} node_env={{environment}}
      i) Choose an instance and environment to install
          => elxr i {{instanceName}} node_env={{environment}}
      c) Choose a command to run ( pull, use, i, npmi ... ) <= pull
          => elxr {{cmd}} {{instanceName}} node_env={{environment}}
      h) Help
      q) Quit
        Default <= d
    : `).then((choice)=>{
      prompt.close();
      if(choice && choice==='d' || !choice) { 
        processedArgs._[0] = 'i'
        processedArgs._[1] = processedArgs._[1] || 'chess'
        processedArgs.node_env = (process.env.NODE_ENV && process.env.NODE_ENV.trim()) || processedArgs.node_env || 'development' 
        defaultRepoServer = 'https://git.bbh.org.in'
        getManifest() // PB : TODO -- acquire the manifest directly from http url instead of clone before cloning the config. Since
          // This is because the manifest at any server location can redirect to the preferred server.. 
      }
      else if(choice === 'h'){ processedArgs._[0] = 'h'
        fs.writeFileSync('run.done', 'noop help');
        console.log(elxr.help()); process.exit()
      }
      else if(choice === 'n' || choice === 'i'){
        var p1 = cli.prompt;
        return p1.ask(`Enter Instance Name ( <= elixir ) : `).then(function(instanceName){
          processedArgs._[0] = 'i'
          processedArgs._[1] = instanceName ? instanceName : 'elixir'
          return p1.ask(`Enter Environment ( <= development ) : `).then(function(node_env){
            processedArgs.node_env = node_env ? node_env : 'development'
            if(choice === 'n') {
              defaultRepoServer = 'https://git.bbh.org.in'
              console.warn(
                chalk.magenta('No Option Available. Your account may not have privileges. You can request here http://git.bbh.org.in/chess'))
              process.exit();
            }
            
            return p1.ask(`Enter preferred repo server ( <= https://git.bbh.org.in ) : `).then(function(reposerver){
              p1.close()
              if(!reposerver) defaultRepoServer = 'https://git.bbh.org.in'
            })

          })
        })
      } else if(choice === 'c'){
        var p1 = cli.prompt;
        return p1.ask(`Enter Instance Name ( <= elixir ) : `).then(function(instanceName){
          processedArgs._[1] = instanceName ? instanceName : 'elixir'
          return p1.ask(`Enter Environment ( <= development ) : `).then(function(node_env){
            processedArgs.node_env = node_env ? node_env : 'development'
            return p1.ask(`Enter cmd : 
      p) pull
        Default <= p
      : `).then(function(cmd){
              if(!cmd || cmd === 'p') {
                processedArgs._[0] = 'pull'
              }
              else processedArgs._[0] = cmd
              return p1.ask(`Enter preferred repo server ( <= https://git.bbh.org.in ) : `).then(function(reposerver){
                if(!reposerver) defaultRepoServer = 'https://git.bbh.org.in'
                p1.close()
              })
            })
          })
        })
      } else {
        console.log(chalk.gray(`Default option not exercised. Please follow manual instructions to customize your instance here http://git.bbh.org.in/chess and try again.`));
        fs.writeFileSync('run.log', ', ' + JSON.stringify({ success : 'quit without execution' }), {'flag':'a+'} )
        fs.writeFileSync('run.done', 'noop quit');
        process.exit()
      }
    })
}

var acquireConfig = function(){
  var instance = getInstance();
  
  var configrepo = processedArgs._[1]+'-config-'+processedArgs.node_env;
  return performPull(configrepo).then(()=>{
    var manifestpath = path.normalize(instance.root + '/' +processedArgs._[1]+'-config-'+processedArgs.node_env+'/repo-manifest');
    repomanifest = require(manifestpath)()
    var chessinstances = {}
    try {
      chessinstances = require(path.normalize(instance.root + '/chessinstances.js'));
      chessinstances[processedArgs._[1]][processedArgs.node_env] = repomanifest;
    }
    catch(e) {
      chessinstances[processedArgs._[1]] = {}
      chessinstances[processedArgs._[1]][processedArgs.node_env] = repomanifest;
    }
    chessinstances['current_run'] = { instanceName : processedArgs._[1], node_env : processedArgs.node_env }
    fs.writeFileSync(  instanceroot + '/chessinstances.js', 'module.exports = ' + JSON.stringify(chessinstances) + '', {'flag':'w'} )
    defaultRepoServer = repomanifest.reposervers[0] // PB : TODO -- Attempt first one that is available and online...
    ENV.NODE_ENV = repomanifest.node_env;
  })
  .catch((e)=>{
    console.error(e)
    console.error('Config acquisition failed.')
  })
}

var launchpath = process.cwd()
var thisscriptdir = __dirname
var instanceroot = launchpath;
var getInstance = function(){
  console.log(`launchpath = ${launchpath}`)
  console.log(`thisscriptdir = ${thisscriptdir}`)

  var root = launchpath;

  // We need a reference to the root director for elxr cli to be properly oriented.
  if((launchpath + path.normalize('/elxr')) === thisscriptdir ) {
    // We ran unbuilt from the proper root with elxr subfolder.
    console.log(`Instance Path : ${root}`)
  }
  else {
    if(launchpath === thisscriptdir){ 
      // Same directory doesn't mean we are being run from elxr directory or the root directory. 
      // It could be a standalone elxr build which may or maynot be in the proper location.
      if(BUILD_VERSION.indexOf('Version: {version} - built on {date}') > -1) {
        // Unbuilt therefore we are in the elxr directory.
        root = path.normalize(launchpath + '../');
      }
      else {
        // Built version.
        // check if we have a elxr subfolder.
        if(fs.existsSync(launchpath + '/..' + path.normalize('/elxr'))) {
          // Probably in the right place.
          root = path.normalize(launchpath + '/..');
        }
        else {
          // Assume launchpath is meaningless.
          // Figure it out from the input instance name and environment parameters if we are in the right location.
          root = path.normalize(launchpath + '/' + processedArgs._[1] + '/' + processedArgs.node_env)
        }
      }
    }
  }
  instanceroot = root;
  return { root };
}

try {
  var detectedInstance = getInstance(); // From launch location etc.

  var chessinstances = require(path.normalize(detectedInstance.root + '/chessinstances.js'));
  processedArgs._[1] = chessinstances.current_run.instanceName;
  processedArgs.node_env = chessinstances.current_run.node_env;
  repomanifest = chessinstances[chessinstances.current_run.instanceName][chessinstances.current_run.node_env]
  // defaultRepoServer = repomanifest.reposervers[0] // PB : TODO -- Attempt first one that is available and online from all that are available...
  return acquireConfig().catch((e)=>{
    console.error('Exisitng config Failed. Fix config and rerun or chose another.')
    console.error(e);  
  }).then(()=>{ return elxrworker(true) })
}
catch(e) {
  console.error(e)
  return acquireChoices().then(()=>{
    return acquireConfig().catch((e)=>{
      console.error('Chosen cofiguraton failed or not found')
      console.error(e)
      fs.writeFileSync('run.log', ', ' + JSON.stringify({ error : e.message }), {'flag':'a+'} )
      fs.writeFileSync('run.done', 'error');
      return process.exit()
    })
    .then(()=>{ return elxrworker(true) })
  })
}