// --------------
// elxr 
//   A cli tool for elixr.
const { existsSync } = require('fs');
const fs = require('fs')
const { spawn, spawnSync } = require('child_process');
const cliargs = require('../elxr/cliargs'); // Use minimist...
const processedArgs = cliargs(process.argv.slice(2));
console.dir(processedArgs)

var path = require('path')
// Serialize a set of functions that will execute to return a promises one after the other.
// Will stop when any one fails.
function any(iterable, continueOnFailure) {
  return iterable.reduce( 
      (p, fn, i ,a) => {
          // console.log('accumulator :');
          // console.log(p);
          if(Promise.resolve(p) === p ) {
            return p.then((pVal) => {

              if(Promise.resolve(pVal) === pVal) {
                // Passed in function retured a promise. We still need to wait for it.
                pVal.then((pVal)=>{

                  // console.log('Then --pVal = ' + pVal + ' bContinue = ' +  continueOnFailure ); console.log(p);  
                  if(!pVal && !continueOnFailure) {
                    console.error("E : pVal :" + pVal);
                    // i==0 ? null :  console.error("E :1 a[i-1] " + a[i-1]);
                    // a.map((i)=>console.error(i.toString()));
                    console.error('debugData 3 -------------------');
                    // console.error(debugData);
                    console.error('debugData 3 -------------------');
                    
                    console.log("Cancelling remaining...");
                    throw 'Failed in reduce 1 '
                    return false; 
                  }
                  // console.log('calling fn : '+ fn);                 
                  return (Promise.resolve(fn) === fn ) ? fn : fn() ;
                })
              }
              else {

                // console.log('Then --pVal = ' + pVal + ' bContinue = ' +  continueOnFailure ); console.log(p);  
                if(!pVal && !continueOnFailure) {
                  console.error("E : pVal :" + pVal);
                  // i==0 ? null :  console.error("E :1 a[i-1] " + a[i-1]);
                  // a.map((i)=>console.error(i.toString()));
                  console.error('debugData 3 -------------------');
                  // console.error(debugData);
                  console.error('debugData 3 -------------------');
                  
                  console.log("Cancelling remaining...");
                  throw 'Failed in reduce 1 '
                  return false; 
                }
                // console.log('calling fn : '+ fn);                 
                return (Promise.resolve(fn) === fn ) ? fn : fn() ;
              }

              
              
            }).catch((error) => { 
              console.error("E : " + error);
              fn ? console.error("Fn : " + fn.toString()) : null;
              // i==0 ? null :  console.error("E :2 a[i-1] " + a[i-1]);
              // a.map((i)=>console.error(i.toString()));
              console.error('debugData 4-------------------------');
              // console.error(debugData);
              console.error('debugData 4-------------------------');

              throw 'Failed in reduce 2 '              
              return false; 
            }) 
          }
          else if(!p) {
            console.log("Bypass on failure");
            return false;
          } 
      }
      , Promise.resolve(true)
  );
}

var isRunningElevated = ()=>{
    return nodeShellExec( "fsutil", ["dirty", "query", "C:"], { 
      inherit : true, shell: true
            , env: process.env
            , title : `check privileged execution mode using fsutil dirty query C:`
    }).then((exitcode)=>{    
      console.log('Elevated')
      return true;
    }).catch(()=>{
      console.log('Not Elevated');
      throw false;
    });
}


var cli = 'elxr';
var ver = '#unversioned'; 
var help = '#unkown list of commands... please refer dveloper documentation for ' + cli;

// 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'
}

// Relevant git repos
var gitRepos = [
  'ember-masonry-grid'
  , 'bbhverse'
  , 'clientverse'
  , 'serververse'
  , 'client'
  // , 'client/server'
  , 'elxr'
  , 'elixir-client'
  , 'elixir-client-unlinked'
  , 'ember-searchable-select'
  , 'loopback-component-jsonapi'
  , 'elixir-config'
  , 'cihsr-config'
  , 'cihsr-data'
  , 'elixir-data'
  , 'loopback-connector-ds'
  , 'chess-server-lib'
  , 'setup'
]

// Repositiories that have symlinks that required elevated priviletes in windows to create symlinks
// 
var elevatedRunasRepos = [
    'elixir-server'
  , 'cihsr-server' 
  , 'chess-server' 
]


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

  var op = {
      'h' : ()=>{ console.log(cli + ' ' + ver + ' ' + help); return '-h' }
    , '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' : ()=>{
      return isRunningElevated().then(
        () => op[ processedArgs.label || processedArgs._[0] || 'h']()
      )
      .catch(()=>{
        console.log('Not Elevated');
        console.log('Requesting Elevated Privileges')
        nodeShellExec('MSHTA', [`javascript: var shell = new ActiveXObject('shell.application'); shell.ShellExecute('node', 'elxr ${processedArgs._[0]} ${processedArgs._[1]} ${processedArgs._[2]} --runas=true', '', 'runas', 1);close();`]
          , {
            // inherit : true
            // , shell: true
            env: process.env
            , title : `runas`
          }
        );
      })
    }
    , 'pull' : (label) => {
      var env = Object.assign({}, process.env); // Shallow clone it.
      // console.dir(env)
      console.log('Running exlr pull : ' + path.dirname(__dirname))
      // nodeShellExec('cmd', ['/c', 'setup\\utility\\chess.bat', 'pull'], {
      // // nodeShellExec('cmd', ['/c', '..\\setup\\utility\\chess.bat', 'pull'], {
      //   stdio: ['pipe', process.stdout, process.stderr],
      //   inherit : true,
      //   shell: true,
      //   cwd : path.dirname(__dirname),
      //   env: env
      // })

      var performPull = repo => {
        if(existsSync(repo)) {
          console.log('pulling ' + repo)
          nodeShellExec('git', ['pull'], {
            inherit : true, shell: true, 
            cwd : repo
            // , env: process.env
            , title : `git pull ${repo}`
          }).catch((e)=>{ console.error(e) }) 
        }
        else {
          console.log('cloning ' + repo)
          nodeShellExec('git', ['clone', '//172.16.0.27/repos/' + repo + '.git'],
          {
            inherit : true, shell: true, 
              env: process.env
            , title : `git clone ${'//172.16.0.27/repos/' + repo + '.git'}`
          }).catch((e)=>{ console.error(e) }) 
        }
      }

      if(!processedArgs.runas) gitRepos.forEach(performPull)
      return isRunningElevated().then( 
        ()=> elevatedRunasRepos.forEach(performPull))
      .catch(
        () => op['runas']()
      )
      
    }
    , 'npmi' : ()=>{
      var tasks = [];
      gitRepos.forEach(repo => {
        
        console.log('npm i for ' + repo)
        // nodeShellExec('pwd', [], {
        //   // inherit : true, shell: true
        //   cwd : repo
        //   // , env: process.env
        //   , title : `pwd  for ${repo}`
        // }).catch((e)=>{ console.error(e) })
        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) })
        tasks.push(()=>{ 
          var p = nodeShellExec('npm', ['i'], {
            inherit : true, shell: true
            , cwd : repo
            , env: process.env
            , title : `npm i for ${repo}`
          }).catch((e)=>{ console.error(e) })
          return p; 
        })
      })
      any(tasks);
      
    }
    , 'start' : (label)=>{ 
      console.log('Starting Elixir Server.');
      var env = Object.assign({}, process.env); // Shallow clone it.
      // console.dir(env)
      env.NODE_ENV = label || 'development';
      env.DEBUG = 'loopback:connector:' + dbForLabel(label)
      
      nodeShellExec('node', ['--inspect=9228', 'elixir/server.js'], {
        // inherit : true,
        shell: true, detached: true,
        cwd : 'elixir-server',
        env: env
      })

      // 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
      })
    }
    , 'use' : ()=>{

      if(!processedArgs.runas){
        try {
          var runconfig = require('./run.js')
          if(processedArgs._[1] && runconfig.use === processedArgs._[1]) {
            return;
          }
          else runconfig.use = processedArgs._[1];
          fs.writeFileSync('./run.js', 'module.exports = ' + JSON.stringify(runconfig))
        }
        catch(e) {
          runconfig = { use : processedArgs._[1] };
          fs.writeFileSync('./run.js', 'module.exports = ' + JSON.stringify(runconfig))
        }
        op['runas']()
      }
      else {
        var runconfig = require('../run.js')
        console.log('runconfig.use : ' + runconfig.use)
        var tasks = [
          ()=>{ 
            var p = nodeShellExec('rm', ['config'], {
              inherit : true, shell: true
              , cwd : repo
              , env: process.env
              , title : `rm 'package-lock.json' for ${repo}`
            }).catch((e)=>{ console.error(e) })
            return p;
          },
          ()=>{ 
            var p = nodeShellExec('rm', ['data'], {
              inherit : true, shell: true
              , cwd : repo
              , env: process.env
              , title : `rm 'package-lock.json' for ${repo}`
            }).catch((e)=>{ console.error(e) })
            return p;
          },
          ()=>{ 
            var p = nodeShellExec('mklink', ['/D', 'data', runconfig.use + '-data'], {
              inherit : true, shell: true
                  , env: process.env
            }).catch((e)=>{ console.error(e) }) 
            return p;
          },
          ()=>{ 
            var p = nodeShellExec('mklink', ['/D', 'config', runconfig.use + '-config'], {
              inherit : true, shell: true
                  , env: process.env
            }).catch((e)=>{ console.error(e) }) 
            return p;
          }
        ]
        any(tasks)
      }
      

      // 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" --profile-directory="Profile 1" 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
            })
          }
        }
        g[processedArgs._[1]]();
    }
  }
  return op[label] ? op[label]() : op['start'](label);
} 

// 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'

__runcmd(processedArgs.label || processedArgs._[0] || 'h');
// nodeShellExec('git', ['status']);

function nodeShellExec() {

    var args = Array.from(arguments);
    const child = spawn(...arguments);

    return new Promise(function(resolve, reject){
      var messages = []; // PB : TODO -- Explore stream for Task level  aggregation to prevent interleaved messages from multiple tasks...
      
      // use child.stdout.setEncoding('utf8'); if you want text chunks
      child.stdout.setEncoding('utf8');
      child.stderr.setEncoding('utf8');
      child.stdout.on('data', (chunk) => { messages.push(chunk); /*console.log(chunk)*/});
      child.on('error', (chunk) => { messages.push(chunk); /*console.error(chunk)*/ });
      child.stderr.on('data', (chunk) => { messages.push(chunk); /*console.log(chunk)*/});
      // child.stderr.pipe(process.stderr);

      child.on('close', (code) => {
        
        console.log([` ${args[2].title} exited with code ${code}`])
        // console.log([ messages.join('') ])
        process.stdout.write( messages.join('') )
        if(code !== 0 ) return reject(code)
        resolve(true)
      });
    });
}