'use strict';

angular.module('copay.send').controller('SendController',
  function($scope, $rootScope, $window, $location, $timeout) {
    $scope.title = 'Send';
    $scope.loading = false;

    // Detect mobile devices
    var isMobile = {
      Android: function() {
          return navigator.userAgent.match(/Android/i);
      },
      BlackBerry: function() {
          return navigator.userAgent.match(/BlackBerry/i);
      },
      iOS: function() {
          return navigator.userAgent.match(/iPhone|iPad|iPod/i);
      },
      Opera: function() {
          return navigator.userAgent.match(/Opera Mini/i);
      },
      Windows: function() {
          return navigator.userAgent.match(/IEMobile/i);
      },
      any: function() {
          return (isMobile.Android() || isMobile.BlackBerry() || isMobile.iOS() || isMobile.Opera() || isMobile.Windows());
      }
    };

    // Detect protocol
    $scope.isHttp = ($window.location.protocol.indexOf('http') === 0);

    navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia;
    window.URL = window.URL || window.webkitURL || window.mozURL || window.msURL;

    $scope.isMobile = isMobile.any();
    $scope.unitIds = ['BTC','mBTC'];
    $scope.selectedUnit = $scope.unitIds[0];

    $scope.submitForm = function(form) {
      if (form.$invalid) {
        $rootScope.$flashMessage = { message: 'You can not send a proposal transaction. Please, try again', type: 'error'};
        return;
      }

      $scope.loading = true;

      var address = form.address.$modelValue;
      var amount = (form.amount.$modelValue * 100000000).toString(); // satoshi to string

      var w = $rootScope.wallet;
      w.createTx(address, amount,function() {
        $scope.loading = false;
        $rootScope.$flashMessage = { message: 'The transaction proposal has been created', type: 'success'};
        $rootScope.$digest();
      });

      // reset fields
      $scope.address = null;
      $scope.amount = null;
      form.address.$pristine = true;
      form.amount.$pristine = true;
    };

    // QR code Scanner
    var cameraInput;
    var video;
    var canvas;
    var $video;
    var context;
    var localMediaStream;

    var _scan = function(evt) {
      if ($scope.isMobile) {
        $scope.scannerLoading = true;
        var files = evt.target.files;

        if (files.length === 1 && files[0].type.indexOf('image/') === 0) {
          var file = files[0];

          var reader = new FileReader();
          reader.onload = (function(theFile) {
            return function(e) {
              var mpImg = new MegaPixImage(file);
              mpImg.render(canvas, { maxWidth: 200, maxHeight: 200, orientation: 6 });

              $timeout(function() {
                qrcode.width = canvas.width;
                qrcode.height = canvas.height;
                qrcode.imagedata = context.getImageData(0, 0, qrcode.width, qrcode.height);

                try {
                  //alert(JSON.stringify(qrcode.process(context)));
                  qrcode.decode();
                } catch (e) {
                  console.log('error decoding QR: '+e);
                }
              }, 1500);
            };
          })(file);

          // Read  in the file as a data URL
          reader.readAsDataURL(file);
        }
      } else {
        if (localMediaStream) {
          context.drawImage(video, 0, 0, 300, 225);

          try {
            qrcode.decode();
          } catch(e) {
            //qrcodeError(e);
          }
        }

        $timeout(_scan, 500);
      }
    };

    var _successCallback = function(stream) {
      video.src = (window.URL && window.URL.createObjectURL(stream)) || stream;
      localMediaStream = stream;
      video.play();
      $timeout(_scan, 1000);
    };

    var _scanStop = function() {
      $scope.scannerLoading = false;
      $scope.showScanner = false;
      if (!$scope.isMobile) {
        if (localMediaStream && localMediaStream.stop) localMediaStream.stop();
        localMediaStream = null;
        video.src = '';
      }
    };

    var _videoError = function(err) {
      console.log('Video Error: ' + JSON.stringify(err));
      _scanStop();
    };

    qrcode.callback = function(data) {
      _scanStop();

      var str = (data.indexOf('bitcoin:') === 0) ? data.substring(8) : data;
      console.log('QR code detected: ' + str);
      $scope.$apply(function() {
        $scope.address = str;
      });
    };

    $scope.cancelScanner = function() {
      _scanStop();
    };

    $scope.openScanner = function() {
      $scope.showScanner = true;

      // Wait a moment until the canvas shows
      $timeout(function() {
        canvas = document.getElementById('qr-canvas');
        context = canvas.getContext('2d');

        if ($scope.isMobile) {
          cameraInput = document.getElementById('qrcode-camera');
          cameraInput.addEventListener('change', _scan, false);
        } else {
          video = document.getElementById('qrcode-scanner-video');
          $video = angular.element(video);
          canvas.width = 300;
          canvas.height = 225;
          context.clearRect(0, 0, 300, 225);

          navigator.getUserMedia({video: true}, _successCallback, _videoError);
        }
      }, 500);
    };
  });