// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.


cr.define('mobile', function() {

  function MobileSetup() {
  }

  cr.addSingletonGetter(MobileSetup);

  MobileSetup.PLAN_ACTIVATION_PAGE_LOADING            = -1;
  MobileSetup.PLAN_ACTIVATION_START                   = 0;
  MobileSetup.PLAN_ACTIVATION_TRYING_OTASP            = 1;
  MobileSetup.PLAN_ACTIVATION_RECONNECTING_OTASP_TRY  = 2;
  MobileSetup.PLAN_ACTIVATION_INITIATING_ACTIVATION   = 3;
  MobileSetup.PLAN_ACTIVATION_RECONNECTING            = 4;
  MobileSetup.PLAN_ACTIVATION_SHOWING_PAYMENT         = 5;
  MobileSetup.PLAN_ACTIVATION_DELAY_OTASP             = 6;
  MobileSetup.PLAN_ACTIVATION_START_OTASP             = 7;
  MobileSetup.PLAN_ACTIVATION_OTASP                   = 8;
  MobileSetup.PLAN_ACTIVATION_RECONNECTING_OTASP      = 9;
  MobileSetup.PLAN_ACTIVATION_DONE                    = 10;
  MobileSetup.PLAN_ACTIVATION_ERROR                   = 0xFF;

  MobileSetup.ACTIVATION_PAGE_URL =
    'chrome-extension://iadeocfgjdjdmpenejdbfeaocpbikmab/activation.html';

  MobileSetup.localStrings_ = new LocalStrings();

  MobileSetup.prototype = {
    // Mobile device information.
    deviceInfo_: null,
    frameName_ : '',
    initialized_ : false,
    faked_transaction_ : false,
    payment_shown_ : false,
    // UI states.
    state_ : -1,
    STATE_UNKNOWN_: "unknown",
    STATE_CONNECTING_: "connecting",
    STATE_ERROR_: "error",
    STATE_PAYMENT_: "payment",
    STATE_ACTIVATING_: "activating",
    STATE_CONNECTED_: "connected",

    initialize: function(frame_name, carrierPage) {
      if (this.initialized_) {
        console.log('calling initialize() again?');
        return;
      }
      this.initialized_ = true;
      self = this;
      this.frameName_ = frame_name;
      window.addEventListener('message', function(e) {
          self.onMessageReceived_(e);
      });
      $('closeButton').addEventListener('click', function(e) {
          $('finalStatus').classList.add('hidden');
      });
      $(frame_name).addEventListener('load', function(e) {
        // Flip the visibility of the payment page only after the frame is
        // fully loaded.
        if (self.state_ == MobileSetup.PLAN_ACTIVATION_SHOWING_PAYMENT) {
          $('statusHeader').textContent = '';
          $('auxHeader').textContent = '';
          $('finalStatus').classList.add('hidden');
          $('systemStatus').classList.add('hidden');
          $('canvas').classList.add('hidden');
          $('carrierPage').classList.add('hidden');
          $('paymentForm').classList.remove('hidden');
        }
      });

      this.changeState_({state: MobileSetup.PLAN_ACTIVATION_PAGE_LOADING});
      setInterval(mobile.MobileSetup.drawProgress, 100);
      // Kick off activation process.
      chrome.send('startActivation', []);
    },

    loadPaymentFrame_: function(deviceInfo) {
      if (deviceInfo) {
        this.deviceInfo_ = deviceInfo;

        $(this.frameName_).contentWindow.location.href =
            this.deviceInfo_.payment_url;
      }
    },

    onMessageReceived_: function(e) {
      if (e.origin !=
            this.deviceInfo_.payment_url.substring(0, e.origin.length))
        return;

      if (e.data.type == 'requestDeviceInfoMsg') {
        this.sendDeviceInfo_();
      } else if (e.data.type == 'reportTransactionStatusMsg') {
        console.log('calling setTransactionStatus from onMessageReceived_');
        $('paymentForm').classList.add('hidden');
        chrome.send('setTransactionStatus', [e.data.status]);
      }
    },

    changeState_: function(deviceInfo) {
      var new_state = deviceInfo.state;
      if (this.state_ == new_state)
        return;
      var main = $('mainbody');
      // Map handler state to UX.
      switch(new_state) {
        case MobileSetup.PLAN_ACTIVATION_PAGE_LOADING:
        case MobileSetup.PLAN_ACTIVATION_START:
        case MobileSetup.PLAN_ACTIVATION_DELAY_OTASP:
        case MobileSetup.PLAN_ACTIVATION_START_OTASP:
        case MobileSetup.PLAN_ACTIVATION_RECONNECTING:
        case MobileSetup.PLAN_ACTIVATION_RECONNECTING_OTASP_TRY:
        case MobileSetup.PLAN_ACTIVATION_RECONNECTING_OTASP:
          $('statusHeader').textContent =
              MobileSetup.localStrings_.getString('connecting_header');
          $('auxHeader').textContent =
              MobileSetup.localStrings_.getString('please_wait');
          $('paymentForm').classList.add('hidden');
          $('finalStatus').classList.add('hidden');
          $('systemStatus').classList.remove('hidden');
          $('canvas').classList.remove('hidden');
          $('carrierPage').classList.remove('hidden');
          break;
        case MobileSetup.PLAN_ACTIVATION_TRYING_OTASP:
        case MobileSetup.PLAN_ACTIVATION_INITIATING_ACTIVATION:
        case MobileSetup.PLAN_ACTIVATION_OTASP:
          $('statusHeader').textContent =
              MobileSetup.localStrings_.getString('activating_header');
          $('auxHeader').textContent =
              MobileSetup.localStrings_.getString('please_wait');
          $('paymentForm').classList.add('hidden');
          $('finalStatus').classList.add('hidden');
          $('systemStatus').classList.remove('hidden');
          $('canvas').classList.remove('hidden');
          $('carrierPage').classList.remove('hidden');
          break;
        case MobileSetup.PLAN_ACTIVATION_SHOWING_PAYMENT:
          $('statusHeader').textContent =
              MobileSetup.localStrings_.getString('connecting_header');
          $('auxHeader').textContent = '';
          $('paymentForm').classList.add('hidden');
          $('finalStatus').classList.add('hidden');
          $('systemStatus').classList.remove('hidden');
          $('canvas').classList.remove('hidden');
          this.loadPaymentFrame_(deviceInfo);
          this.payment_shown_ = true;
          break;
        case MobileSetup.PLAN_ACTIVATION_DONE:
          $('statusHeader').textContent = '';
          $('auxHeader').textContent = '';
          $('finalHeader').textContent =
              MobileSetup.localStrings_.getString('completed_header');
          $('finalMessage').textContent =
              MobileSetup.localStrings_.getString('completed_text');
          $('systemStatus').classList.add('hidden');
          $('canvas').classList.add('hidden');
          $('carrierPage').classList.add('hidden');
          $('paymentForm').classList.remove('hidden');
          $('closeButton').classList.remove('hidden');
          $('finalStatus').classList.remove('hidden');
          if (this.payment_shown_)
            $('closeButton').classList.remove('hidden');
          else
            $('closeButton').classList.add('hidden');
          break;
        case MobileSetup.PLAN_ACTIVATION_ERROR:
          $('statusHeader').textContent = '';
          $('auxHeader').textContent = '';
          $('finalHeader').textContent =
              MobileSetup.localStrings_.getString('error_header');
          $('finalMessage').textContent = deviceInfo.error;
          $('systemStatus').classList.add('hidden');
          $('canvas').classList.add('hidden');
          $('carrierPage').classList.add('hidden');
          $('paymentForm').classList.remove('hidden');
          if (this.payment_shown_)
            $('closeButton').classList.remove('hidden');
          else
            $('closeButton').classList.add('hidden');
          $('finalStatus').classList.remove('hidden');
          break;
      }
      this.state_ = new_state;
    },

    updateDeviceStatus_: function(deviceInfo) {
      this.changeState_(deviceInfo);
    },

    sendDeviceInfo_ : function() {
      var msg = {
        type: 'deviceInfoMsg',
        domain: document.location,
        payload: {
          'carrier': this.deviceInfo_.carrier,
          'MEID': this.deviceInfo_.MEID,
          'IMEI': this.deviceInfo_.IMEI,
          'MDN': this.deviceInfo_.MDN
        }
      };
      $(this.frameName_).contentWindow.postMessage(msg,
          this.deviceInfo_.payment_url);
    }

  };

  MobileSetup.drawProgress = function () {
    var ctx = canvas.getContext('2d');
    ctx.clearRect(0, 0, canvas.width, canvas.height);

    var segmentCount = Math.min(12, canvas.width/1.6) // Number of segments
    var rotation = 0.75; // Counterclockwise rotation

    // Rotate canvas over time
    ctx.translate(canvas.width/2, canvas.height/2);
    ctx.rotate(Math.PI * 2 / (segmentCount + rotation));
    ctx.translate(-canvas.width/2, -canvas.height/2);

    var gap = canvas.width / 24; // Gap between segments
    var oRadius = canvas.width/2; // Outer radius
    var iRadius = oRadius * 0.618; // Inner radius
    var oCircumference = Math.PI * 2 * oRadius; // Outer circumference
    var iCircumference = Math.PI * 2 * iRadius; // Inner circumference
    var oGap = gap / oCircumference; // Gap size as fraction of  outer ring
    var iGap = gap / iCircumference; // Gap size as fraction of  inner ring
    var oArc = Math.PI * 2 * ( 1 / segmentCount - oGap); // Angle of outer arcs
    var iArc = Math.PI * 2 * ( 1 / segmentCount - iGap); // Angle of inner arcs

    for (i = 0; i < segmentCount; i++){ // Draw each segment
      var opacity = Math.pow(1.0 - i / segmentCount, 3.0);
      opacity = (0.15 + opacity * 0.8) // Vary from 0.15 to 0.95
      var angle = - Math.PI * 2 * i / segmentCount;

      ctx.beginPath();
      ctx.arc(canvas.width/2, canvas.height/2, oRadius,
        angle - oArc/2, angle + oArc/2, false);
      ctx.arc(canvas.width/2, canvas.height/2, iRadius,
        angle + iArc/2, angle - iArc/2, true);
      ctx.closePath();
      ctx.fillStyle = "rgba(240, 30, 29, " + opacity + ")";
      ctx.fill();
    }
  };

  MobileSetup.deviceStateChanged = function(deviceInfo) {
    MobileSetup.getInstance().updateDeviceStatus_(deviceInfo);
  };

  MobileSetup.loadPage = function() {
    mobile.MobileSetup.getInstance().initialize('paymentForm',
        mobile.MobileSetup.ACTIVATION_PAGE_URL);
  };

  // Export
  return {
    MobileSetup: MobileSetup
  };

});