var PM2 = new require('../..');
var God = require('../../lib/God');
var numCPUs = require('os').cpus().length;
var fs = require('fs');
var path = require('path');
var should = require('should');
var Common = require('../../lib/Common');

var cst = require('../../constants.js');

// Change to current folder
process.chdir(__dirname);

var pm2= new PM2.custom();

/**
 * Description
 * @method getConf
 * @return AssignmentExpression
 */
function getConf() {
  var a = Common.prepareAppConf({ cwd : process.cwd() }, {
    script : '../fixtures/echo.js',
    name : 'echo',
    instances : 2
  });
  return a;
}

function getConf2() {
  return Common.prepareAppConf({ cwd : process.cwd() }, {
    script : '../fixtures/echo2.js',
    instances       : 4,
    exec_mode       : 'cluster_mode',
    name : 'child'
  });
}

function getConf3() {
  return Common.prepareAppConf({ cwd : process.cwd() }, {
    script : '../fixtures/echo3.js',
    instances       : 10,
    exec_mode       : 'cluster_mode',
    name : 'child'
  });
}

function getConf4() {
  return Common.prepareAppConf({ cwd : process.cwd() }, {
    script : '../fixtures/args.js',
    args            : ['-d', '-a'],
    instances       : '1',
    name : 'child'
  });
}

var async = require('async');

function deleteAll(data, cb) {
  var processes = God.getFormatedProcesses();

  async.eachLimit(processes, cst.CONCURRENT_ACTIONS, function(proc, next) {
    console.log('Deleting process %s', proc.pm2_env.pm_id);
    God.deleteProcessId(proc.pm2_env.pm_id, function() {
      return next();
    });
    return false;
  }, function(err) {
    if (err) return cb(God.logAndGenerateError(err), {});

    God.clusters_db = null;
    God.clusters_db = {};
    return cb(null, []);
  });
}


describe('God', function() {
  before(function(done) {
    pm2.connect(function() {
      deleteAll({}, function(err, dt) {
        done()
      });
    });
  });

  it('should have right properties', function() {
    God.should.have.property('prepare');
    God.should.have.property('ping');
    God.should.have.property('dumpProcessList');
    God.should.have.property('getProcesses');
    God.should.have.property('getMonitorData');
    God.should.have.property('getSystemData');
    God.should.have.property('getFormatedProcesses');
    God.should.have.property('checkProcess');
    God.should.have.property('reloadLogs');
    God.should.have.property('stopProcessId');
    God.should.have.property('sendSignalToProcessId');
    God.should.have.property('sendSignalToProcessName');
  });

  describe('One process', function() {
    var proc, pid;

    it('should fork one process', function(done) {
      God.prepare(getConf(), function(err, procs) {
        should(err).be.null();
	      procs[0].pm2_env.status.should.be.equal('online');
        var a = God.getFormatedProcesses()
	      God.getFormatedProcesses().length.should.equal(2);
	      done();
      });
    });
  });

  describe('Process State Machine', function() {
    var clu, pid;

    before(function(done) {
      deleteAll({}, function(err, dt) {
        done();
      });
    });
    it('should start a process', function(done) {
      God.prepare(getConf(), function(err, procs) {
        clu = procs[0];

        pid = clu.pid;
	      procs[0].pm2_env.status.should.be.equal('online');
	      done();
      });
    });

    it('should stop a process and keep in database on state stopped', function(done) {
      God.stopProcessId(clu.pm2_env.pm_id, function(err, proc) {
        proc.pm2_env.status.should.be.equal('stopped');
        God.checkProcess(proc.pid).should.be.equal(false);
        done();
      });
    });

    it('should restart the same process and set it as state online and be up', function(done) {
      God.restartProcessId({id:clu.pm2_env.pm_id}, function(err, dt) {
        var proc = God.findProcessById(clu.pm2_env.pm_id);
        proc.pm2_env.status.should.be.equal('online');
        God.checkProcess(proc.process.pid).should.be.equal(true);
        done();
      });
    });

    it('should stop and delete a process id', function(done) {
      var old_pid = clu.pid;
      God.deleteProcessId(clu.pm2_env.pm_id, function(err, dt) {
        var proc = God.findProcessById(clu.pm2_env.pm_id);
        God.checkProcess(old_pid).should.be.equal(false);
        God.getFormatedProcesses().length.should.be.equal(1);
        done();
      });
    });

  });


  describe('Reload - cluster', function() {

    before(function(done) {
      deleteAll({}, function(err, dt) {
        done();
      });
    });

    it('should launch app', function(done) {
      God.prepare(getConf2(), function(err, procs) {
	      var processes = God.getFormatedProcesses();

        setTimeout(function() {
          processes.length.should.equal(4);
          processes.forEach(function(proc) {
            proc.pm2_env.restart_time.should.eql(0);
          });
          done();
        }, 100);
      });
    });

  });

  describe('Multi launching', function() {

    before(function(done) {
      deleteAll({}, function(err, dt) {
        done();
      });
    });

    afterEach(function(done) {
      this.timeout(5000);
      deleteAll({}, function(err, dt) {
        done();
      });
    });

    it('should launch multiple processes depending on CPUs available', function(done) {
      this.timeout(5000);

      God.prepare(Common.prepareAppConf({cwd : process.cwd() }, {
        script : '../fixtures/echo.js',
        name : 'child',
        instances:3
      }), function(err, procs) {
	      God.getFormatedProcesses().length.should.equal(3);
        procs.length.should.equal(3);
        done();
      });
    });

    it('should start maximum processes depending on CPU numbers', function(done) {
      God.prepare(getConf3(), function(err, procs) {
	      God.getFormatedProcesses().length.should.equal(10);
        procs.length.should.equal(10);
        done();
      });
    });

    it('should dump process list', function(done) {
      God.prepare(Common.prepareAppConf({cwd : process.cwd() }, {
        script    : '../fixtures/echo.js',
        name      : 'child',
        instances : 3
      }), function(err, procs) {
        God.getFormatedProcesses().length.should.equal(3);
        procs.length.should.equal(3);

        God.dumpProcessList(function(err) {
          should(err).be.null();
          var apps = fs.readFileSync(cst.DUMP_FILE_PATH);
          apps = JSON.parse(apps);
          apps.length.should.equal(3);
          done();
        });
      });
    });

    it('should handle arguments', function(done) {
      God.prepare(getConf4(), function(err, procs) {
        setTimeout(function() {
          God.getFormatedProcesses()[0].pm2_env.restart_time.should.eql(0);
          done();
        }, 500);
      });
    });

  });

  it('should report pm2 version', function(done) {
    God.getVersion({}, function(err, version) {
      version.should.not.be.null();
      done();
    });
  });

});