var Util = require('../../util');
var logger = Util.Logger;
var path = require('path');
var _ = require('lodash');

// Action types
var LOAD_DESKTOP_APPS = exports.LOAD_PROFILE = 'LOAD_DESKTOP_APPS';
var LOAD_DESKTOP_APPS_SUCCESS = exports.LOAD_DESKTOP_APPS_SUCCESS = 'LOAD_DESKTOP_APPS_SUCCESS';
var LOAD_DESKTOP_APPS_FAILED = exports.LOAD_DESKTOP_APPS_FAILED = 'LOAD_DESKTOP_APPS_FAILED';

var SAVE_PROFILE = exports.SAVE_PROFILE = 'SAVE_PROFILE';
var SAVE_PROFILE_SUCCESS = exports.SAVE_PROFILE_SUCCESS = 'SAVE_PROFILE_SUCCESS';
var SAVE_PROFILE_FAILED = exports.SAVE_PROFILE_FAILED = 'SAVE_PROFILE_FAILED';

var MOVE_PROFILE_ITEM = exports.MOVE_PROFILE_ITEM = 'MOVE_PROFILE_ITEM';
var ADD_PROFILE_ITEM = exports.ADD_PROFILE_ITEM = 'ADD_PROFILE_ITEM';
var REMOVE_PROFILE_ITEM = exports.REMOVE_PROFILE_ITEM = 'REMOVE_PROFILE_ITEM';
var USE_ICON_THEME = exports.USE_ICON_THEME = 'USE_ICON_THEME';
var SELECT_PROFILE_ITEM = exports.SELECT_PROFILE_ITEM = 'SELECT_PROFILE_ITEM';
var UPDATE_PROFILE_ITEM = exports.UPDATE_PROFILE_ITEM = 'UPDATE_PROFILE_ITEM';

// Actions creators

exports.loadDesktopApps = function() {

  return function(dispatch, getState) {

    logger.info('Loading desktop apps...');

    var baseDirs = global.process.env.XDG_DATA_DIRS.split(':').map(function(baseDir){
      return path.join(baseDir, 'applications');
    });

    dispatch({ type: LOAD_DESKTOP_APPS });

    return Util.DesktopApps.loadAllDesktopFiles(baseDirs)
      .then(function(desktopApps) {
        logger.info('Desktop apps loaded.');
        dispatch({ type: LOAD_DESKTOP_APPS_SUCCESS, desktopApps: desktopApps });
      })
      .catch(function(err) {
        dispatch({ type: LOAD_DESKTOP_APPS_FAILED, error: err });
      })
    ;

  };
};

exports.saveProfile = function(destPath, profile) {
  return function(dispatch, getState) {

    dispatch({ type: SAVE_PROFILE, profile: profile, path: destPath });

    logger.info('Saving profile to "%s"...', destPath);

    var cleanedProfile = _.cloneDeep(profile);

    Util.Tree.walk(cleanedProfile, function(item) {
      delete item.selected;
      delete item._key;
    });

    return Util.System.saveJSON(destPath, cleanedProfile)
      .then(function() {
        dispatch({ type: SAVE_PROFILE_SUCCESS, profile: profile, path: destPath });
        logger.info('Profile saved.');
      })
      .catch(function(err) {
        dispatch({ type: SAVE_PROFILE_FAILED, error: err });
      })
    ;

  };
};

exports.useIconTheme = function(theme) {
  return {
    type: USE_ICON_THEME,
    theme: theme
  };
};

exports.moveProfileItem = function(movedItem, targetItem) {
  return {
    type: MOVE_PROFILE_ITEM,
    movedItem: movedItem,
    targetItem: targetItem
  };
};

exports.removeProfileItem = function(removedItem) {
  return {
    type: REMOVE_PROFILE_ITEM,
    removedItem: removedItem
  };
};

exports.addProfileItem = function(newItem, targetItem) {
  return {
    type: ADD_PROFILE_ITEM,
    newItem: newItem,
    targetItem: targetItem
  };
};

exports.selectProfileItem = function(item) {
  return {
    type: SELECT_PROFILE_ITEM,
    item: item
  };
};

exports.updateProfileItem = function(item, key, value) {
  return {
    type: UPDATE_PROFILE_ITEM,
    item: item,
    key: key,
    value: value
  };
};