/*
 * This is a debug tool. It helps to extract all datas of a pad and move it from
 * a productive environment and to a develop environment to reproduce bugs
 * there. It outputs a dirtydb file
 */

if (process.argv.length != 3) {
  console.error("Use: node extractPadData.js $PADID");
  process.exit(1);
}

// get the padID
var padId = process.argv[2];

var db, dirty, padManager, pad, settings;
var neededDBValues = ["pad:"+padId];

var npm = require('../node_modules/ep_etherpad-lite/node_modules/npm');
var async = require('../node_modules/ep_etherpad-lite/node_modules/async');

async.series([
  // load npm
  function(callback) {
    npm.load({}, function(er) {
      if (er) {
        console.error("Could not load NPM: " + er)
        process.exit(1);
      } else {
        callback();
      }
    })
  },

  // load modules
  function(callback) {
    settings = require('../node_modules/ep_etherpad-lite/node/utils/Settings');
    db = require('../node_modules/ep_etherpad-lite/node/db/DB');
    dirty = require('../node_modules/ep_etherpad-lite/node_modules/ueberDB/node_modules/dirty')(padId + ".db");
    callback();
  },

  // initialize the database
  function (callback) {
    db.init(callback);
  },

  // get the pad
  function (callback) {
    padManager = require('../node_modules/ep_etherpad-lite/node/db/PadManager');

    padManager.getPad(padId, function(err, _pad) {
      pad = _pad;
      callback(err);
    });
  },

  function (callback) {
    // add all authors
    var authors = pad.getAllAuthors();
    for (var i = 0; i < authors.length; i++) {
      neededDBValues.push('globalAuthor:' + authors[i]);
    }

    // add all revisions
    var revHead = pad.head;
    for (var i = 0; i <= revHead; i++) {
      neededDBValues.push('pad:' + padId + ':revs:' + i);
    }

    // get all chat values
    var chatHead = pad.chatHead;
    for (var i = 0; i <= chatHead; i++) {
      neededDBValues.push('pad:' + padId + ':chat:' + i);
    }

    // get and set all values
    async.forEach(neededDBValues, function(dbkey, callback) {
      db.db.db.wrappedDB.get(dbkey, function(err, dbvalue) {
        if (err) { callback(err); return}

        if (dbvalue && typeof dbvalue != 'object') {
          dbvalue = JSON.parse(dbvalue); // if it's not json then parse it as json
        }

        dirty.set(dbkey, dbvalue, callback);
      });
    }, callback);
  }
],
function (err) {
  if (err) {
    throw err;
  } else {
    console.log("finished");
    process.exit();
  }
});