// vim: ts=2:sw=2:expandtab:
var Whisper = Whisper || {};

(function () {
  'use strict';

  var Thread = Backbone.Model.extend({
    defaults: function() {
      return {
        name: 'New Group',
        image: '/images/default.png',
        unreadCount: 0,
        timestamp: new Date().getTime(),
        active: true
      };
    },

    validate: function(attributes, options) {
      var required = ['type', 'timestamp', 'image', 'name'];
      var missing = _.filter(required, function(attr) { return !attributes[attr]; });
      if (missing.length) { return "Thread must have " + missing; }
    },

    sendMessage: function(message, attachments) {
      return Promise.all(attachments.map(function(a) {
        return new Promise(function(resolve, reject) {
          var dataView = new DataView(a.data);
          var blob = new Blob([dataView], { type: a.contentType });
          var FR = new FileReader();
          FR.onload = function(e) {
            resolve(e.target.result);
          };
          FR.onerror = reject;
          FR.readAsDataURL(blob);
        });
      })).then(function(base64_attachments) {
        var timestamp = Date.now();

        this.messages().add({ type: 'outgoing',
                              body: message,
                              threadId: this.id,
                              attachments: base64_attachments,
                              timestamp: timestamp }).save();

        this.save({ timestamp:   timestamp,
                    unreadCount: 0,
                    active:      true});

        if (this.get('type') == 'private') {
          return textsecure.messaging.sendMessageToNumber(this.get('id'), message, attachments);
        }
        else {
          return textsecure.messaging.sendMessageToGroup(this.get('groupId'), message, attachments);
        }
      }.bind(this)).then(function(result) {
        console.log(result);
      }).catch(function(error) {
        console.log(error);
      });
    },

    messages: function() {
      if (!this.messageCollection) {
        this.messageCollection = new Whisper.MessageCollection([], {threadId: this.id});
      }
      return this.messageCollection;
    },
  });

  Whisper.Threads = new (Backbone.Collection.extend({
    localStorage: new Backbone.LocalStorage("Threads"),
    model: Thread,

    comparator: function(m) {
      return -m.get('timestamp');
    },

    findOrCreate: function(attributes) {
      var thread = Whisper.Threads.add(attributes, {merge: true});
      thread.save();
      return thread;
    },

    createGroup: function(recipients, name) {
      var attributes = {};
      attributes = {
        name      : name,
        numbers   : recipients,
        type      : 'group',
      };
      var thread = this.findOrCreate(attributes);
      return textsecure.messaging.createGroup(recipients, name).then(function(groupId) {
        thread.set('id', getString(groupId));
        thread.set('groupId', getString(groupId));
        thread.save();
        return thread;
      });
    },

    findOrCreateForRecipient: function(recipient) {
      var attributes = {};
      attributes = {
        id        : recipient,
        name      : recipient,
        type      : 'private',
      };
      return this.findOrCreate(attributes);
    },

    findOrCreateForIncomingMessage: function(decrypted) {
      var attributes = {};
      if (decrypted.message.group) {
        attributes = {
          id         : decrypted.message.group.id,
          groupId    : decrypted.message.group.id,
          name       : decrypted.message.group.name || 'New group',
          type       : 'group',
        };
      } else {
        attributes = {
          id         : decrypted.pushMessage.source,
          name       : decrypted.pushMessage.source,
          type       : 'private'
        };
      }
      return this.findOrCreate(attributes);
    }

  }))();
})();