/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

"use strict";

const {classes: Cc, interfaces: Ci, utils: Cu, results: Cr} = Components;

Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://formautofill/FormAutofillUtils.jsm");

function EditDialog(profile) {
  this._profile = profile;
  window.addEventListener("DOMContentLoaded", this, {once: true});
}

EditDialog.prototype = {
  init() {
    this.refs = {
      controlsContainer: document.getElementById("controls-container"),
      cancel: document.getElementById("cancel"),
      save: document.getElementById("save"),
    };
    this.attachEventListeners();
  },

  /**
   * Asks FormAutofillParent to save or update a profile.
   * @param  {object} data
   *         {
   *           {string} guid [optional]
   *           {object} profile
   *         }
   */
  saveProfile(data) {
    Services.cpmm.sendAsyncMessage("FormAutofill:SaveProfile", data);
  },

  /**
   * Fill the form with a profile object.
   * @param  {object} profile
   */
  loadInitialValues(profile) {
    for (let field in profile) {
      let input = document.getElementById(field);
      if (input) {
        input.value = profile[field];
      }
    }
  },

  /**
   * Get inputs from the form.
   * @returns {object}
   */
  buildProfileObject() {
    return Array.from(document.forms[0].elements).reduce((obj, input) => {
      if (input.value) {
        obj[input.id] = input.value;
      }
      return obj;
    }, {});
  },

  /**
   * Handle events
   *
   * @param  {DOMEvent} event
   */
  handleEvent(event) {
    switch (event.type) {
      case "DOMContentLoaded": {
        this.init();
        if (this._profile) {
          this.loadInitialValues(this._profile);
        }
        break;
      }
      case "click": {
        this.handleClick(event);
        break;
      }
      case "input": {
        // Toggle disabled attribute on the save button based on
        // whether the form is filled or empty.
        if (Object.keys(this.buildProfileObject()).length == 0) {
          this.refs.save.setAttribute("disabled", true);
        } else {
          this.refs.save.removeAttribute("disabled");
        }
        break;
      }
    }
  },

  /**
   * Handle click events
   *
   * @param  {DOMEvent} event
   */
  handleClick(event) {
    if (event.target == this.refs.cancel) {
      this.detachEventListeners();
      window.close();
    }
    if (event.target == this.refs.save) {
      if (this._profile) {
        this.saveProfile({
          guid: this._profile.guid,
          profile: this.buildProfileObject(),
        });
      } else {
        this.saveProfile({
          profile: this.buildProfileObject(),
        });
      }
      this.detachEventListeners();
      window.close();
    }
  },

  /**
   * Attach event listener
   */
  attachEventListeners() {
    this.refs.controlsContainer.addEventListener("click", this);
    document.addEventListener("input", this);
  },

  /**
   * Remove event listener
   */
  detachEventListeners() {
    this.refs.controlsContainer.removeEventListener("click", this);
    document.removeEventListener("input", this);
  },
};

// Pass in argument from openDialog
new EditDialog(window.arguments[0]);