#!/usr/bin/env node

/**
 * Dependencies
 */

var program = require('commander')
  , dpd = require('../')
  , fs = require('fs')
;

// Options

program
  .version('0.4.0')
  .option('-j, --json', 'output as json')
  .option('-p, --port <port>', 'specify the port (2403)')
  .option('-s, --storage <url>', 'specify where to store resources (mongodb://localhost/deployd)')
  .option('-d, --destination <url>', 'specify where to push to when cloning')
;

/**
 * A method to output json.
 */

function json(obj) {
  if(program && program.json) process.stdout.write(JSON.stringify(obj));
}

/**
 * Silent if in json mode.
 */
 
function log() {
  if(!program.json) console.log.apply(console, arguments);
}

/**
 * List all administration keys (users).
 */

program
  .command('keys')
  .description(' - list all admin keys')
  .action(function () {
    var port = program.port || 2403;

    if(program.storage) {
      dpd.storage(program.storage);
    }

    dpd.use('http://localhost:' + port).use('/keys').get(function (err, keys) {

      json(keys);
      log(keys || 'no keys found! see dpd --help');
      
      process.exit();
    })
  })

/**
 * Add a new admin key.
 */

program
  .command('addkey [key]')
  .description(" - add a new admin key eg. dpd addkey '{\"user\": \"foo\", \"label\": \"admin\"}'")
  .action(function (key) {
    try {
      key = JSON.parse(key);
    } catch(e) {
      key = undefined;
    }
    
    var strength = Math.floor(Math.random() * 5) + 2;
    
    while(strength--) {
      key[keygen()] = keygen() + keygen() + keygen();
    }
    
    if(typeof key == 'object') {
      if(program.storage) {
        dpd.storage(program.storage);
      }
      
      var port = program.port || 2403;
      
      dpd.use('http://localhost:' + port).use('/keys').post(key, function (err, newKey) {
        if(err) {
          json(err);
          log('Could not add key', err);
        } else {
          log('added key', newKey);          
        }
        process.exit();
      })
    } else {
      var msg = 'key must be a valid JSON object with more than one attribute!';
      json(new Error(msg))
      log(msg);
    }
  })
;

/**
 * Keygen
 */
 
function keygen() {
  // TODO added randomness
  return Math.random().toString().split('.')[1];
}

/**
 * Generate a key
 */
 
program
  .command('key')
  .description(" - generate, add, and print a random admin key")
  .action(function () {
    
    var port = program.port || 2403;
    var key = {}, strength = Math.floor(Math.random() * 5) + 2;
    
    while(strength--) {
      key[keygen()] = keygen() + keygen() + keygen();
    }
    
    if(program.storage) {
      dpd.storage(program.storage);
    }
    
    dpd.use('http://localhost:' + port).use('/keys').post(key, function (err, newKey) {
      if(err) {
        json(err);
        log('Could not add key', err);
      } else {
        json(newKey);
        log('added key:\n\n' + JSON.stringify(newKey) + '\n');          
      }
      process.exit();
    })
  })
;

/**
 * Remove an admin key by id.
 */

 program
   .command('rm [query]')
   .description(' - remove an admin key by query')
   .action(function (query) {
     if(!query) return console.log('you must provide the _id of they key you want to remove');
     
     // parse the query
     query = JSON.parse(query);
     
     if(program.storage) {
       dpd.storage(program.storage);
     }
     
     if(Object.keys(query) < 1) throw 'use `dpd reset` to clear all keys';
     
     var port = program.port || 2403;
     
     dpd.use('http://localhost:' + port).use('/keys').del(query, function (err) {
       if(err) {
         json(err);
         log(err);
       } else {
         json({removed: query});
         log('removed all keys matching the given query');
       }
       process.exit();
     })
   });

/**
* Remove all admin keys.
*/

program
  .command('reset')
  .description(" - remove all admin keys by query (cannot be undone)'")
  .action(function () {

    if(program.storage) {
      dpd.storage(program.storage);
    }
    
    var port = program.port || 2403;

    dpd.use('http://localhost:' + port).use('/keys').del(function (err) {
      if(err) {
        json(err);
        log(err);
      } else {
        json({removed: 'all'});
        log('removed all keys');
      }
      process.exit();
    })
  });


/**
 * Start the http server and listen.
 */

program
  .command('listen')
  .description(' - start listening over http at the provided port')
  .action(function (cmd) {
    
    var port = program.port || 2403;
    
    if(program.storage) {
      dpd.storage(program.storage);
    }

    dpd.use('http://localhost:' + port).listen(function () {
      json({port: port, storage: dpd.storage()});
      log('deployd is listening on port %s and storing resources at %s', port, dpd.storage());
    });
  })
;

  /**
   * Clone one dpd configuration into another.
   */

  program
    .command('clone')
    .description(' - clone the configuration and files of one instance into another')
    .action(function () {
      var port = program.port || 2403;

      if(!program.storage || !program.destination) throw 'a destination (--dest) and storage (--storage) are required';
      
      dpd.storage(program.storage);
      dpd.use('/resources').get(function (err, resources) {
        if(!resources) {
          json({status: 'none found'});
          log('none found');
          process.kill(process.pid);
          return;
        };
        if(err) throw err;
        
        var dest = dpd.use('/resources');
        dest.storage(program.destination);
        
        dest.post(resources, function (err) {
          if(err) throw err;
          var remaining = 0;
          
          resources.forEach(function (resource) {
            if(resource.type === 'Static') {
              dpd.storage(program.storage);
              // / is an alias for /index
              var collection = resource.path;
              if(collection === '/') collection = '/index';
              
              var srcFiles = require('mdoq').require('mdoq-mongodb').use(program.storage).use(collection);
              var destFiles = require('mdoq').require('mdoq-mongodb').use(program.destination).use(collection);
              
              dpd.use(resource.path).get({}, function (err, files) {
                files.forEach(function (file) {
                  remaining++;
                  
                  var id = {_id: file};
                  
                  srcFiles.get(id, function (err, res) {
                    if(err) log(err);
                    if(!err && res) {
                    
                      var temp = require('fs').createWriteStream('/tmp/' + file);
                    
                      res.file.stream(true).pipe(temp).on('close', function () {
                        destFiles.get({}).file(require('fs').createReadStream('/tmp/' + file)).post(function (err) {
                          remaining--;

                          if(!remaining) {
                            json({status: 'done.'});
                            log('done.');
                            process.kill(process.pid);
                          }
                        })
                      })
                    }
                  })
                })
              })
            }
          })
        })
      })
    })
  ;

  program
    .command('init [remote] [key]')
    .description(' - initialize a set of local files')
    .action(function (remote, key) {      
      if(!remote) {
        log('A remote host is required');
      }
      if(!key) {
        log('A valid JSON auth key is required');
      }
      
      if(!key || !remote) {
        log('example:');
        log('\tdpd init http://localhost:2403 \'{"foo":"bar"}\'');
        return;
      }
      
      try {
        JSON.parse(key);
      } catch(e) {
        log('invalid JSON for key, make sure it is a string: \'{"foo": "bar"}\'');
        return;
      }
      
      var config = {
        key: key,
        remote: remote
      };
      fs.writeFileSync('./.dpd', JSON.stringify(config));
    })
  ;

  program
    .command('pull')
    .description(' - download a remote instance configuration and files into the current directory')
    .action(function () {
      try {
        var config = JSON.parse(fs.readFileSync('./.dpd'));
      } catch(e) {
        log('you must run dpd init before pull');
      }
      
      var key = config.key
        , remote = config.remote;
      
      var client = require('mdoq')
        .use(function (req, res, next) {
          req.headers['x-dssh-key'] = key;
          next();
        })
        .require('mdoq-http')
        .use(remote)
      ;
      
      var remaining = 0;
      
      client
        .use('/resources').get(function (err, resources) {
          if(err || resources && resources.status) return log(err || resources);
          if(!resources) {
            log('done.');
            process.kill(process.pid);
            return;
          }
          resources.forEach(function (resource) {
            if(resource.type === 'Static') {                
              client.use(resource.path).get(function (err, files) {
                if(resource.path === '/') resource.path = '';
                
                if(files) {
                  try {
                    fs.mkdirSync('.' + resource.path); 
                  } catch(e) {}
                  files.forEach(function (file) {
                    remaining++;
                    log('PULL', resource.path + '/' + file);
                    client.use(resource.path + '/' + file)
                    .get()
                    .pipe(fs.createWriteStream('.' + resource.path + '/' + file))
                    .get(function () {
                      remaining--;
                      if(!remaining) {
                        log('done.');
                        process.kill(process.pid);
                      }
                    })
                  })
                }
              })
            }
          })
        })

    })
  ;

  program
    .command('push')
    .description(' - push the current directories first level of files to the remote instance')
    .action(function () {
      try {
        var config = JSON.parse(fs.readFileSync('./.dpd'));
      } catch(e) {
        log('you must run dpd init before push');
        return;
      }
      
      var key = config.key
        , remote = config.remote;
        
      var client = require('mdoq')
        .use(function (req, res, next) {
          req.headers['x-dssh-key'] = key;
          next();
        })
        .require('mdoq-http')
        .use(remote)
      ;

      
      client
        .use('/resources').get(function (err, resources) {
          if(err || resources && resources.status) return log(err || resources);
      
          var resourceMap = {};
          
          // create resource map
          resources && resources.forEach(function (resource) {
            if(resource.type === 'Static') {
              resourceMap[resource.path] = true;
            }
          })
          
          function uploadDir(path) {
            if(path === '/') path = '';
            
            fs.readdirSync('.' + path).forEach(function (file) {
              if(fs.statSync('.' + path + '/' + file).isFile()) {
                uploadFile(path + '/' + file);
              }
            })
          }
          
          var remaining = 0;
          function uploadFile(path) {
            if(path[0] === '.') return; // skip hidden files
            remaining++;
            console.log('PUSH', path);
            client.use(path).post(fs.createReadStream('.' + path), function (err) {
              remaining--;
              if(err) {
                log(err);
                return process.kill();
              }

              if(!remaining) {
                log('done.');
                process.kill(process.pid);
              }
            });
          }
          
          var creatingIndex;
          
          fs.readdirSync('.').forEach(function (path) {
            if(path[0] === '.') return; // skip hidden files
            
            path = '/' + path;
            if(fs.statSync('.' + path).isFile() && !creatingIndex) {
              if(resourceMap['/']) {
                uploadFile(path);
              } else {
                console.log('CREATE /');
                creatingIndex = true;
                // create the resource
                client.use('/resources').post({path: '/', typeLabel: 'Files', type: 'Static'}, function (err) {
                  // then upload the directory
                  uploadDir('/');
                });
              }
            } else {
              // folder
              if(resourceMap[path]) {
                // exists as a resource
                uploadDir(path); 
              } else {
                // create the resource
                console.log('CREATE', path);
                remaining++;
                client.use('/resources').post({path: path, typeLabel: 'Files', type: 'Static'}, function (err) {
                  remaining--;
                  // then upload the directory
                  uploadDir(path);
                });
              }
            }
          })
        })
      ;
    })
  ;

// Parse

program.parse(process.argv);