import Ember from 'ember';

export
default Ember.Service.extend({
  session: Ember.inject.service(),
  store: Ember.inject.service(),
  firebase: Ember.inject.service(),
  firebaseApp: Ember.inject.service(),


  currentUser:function(){
    var providerData = this.get('session.currentUser.providerData.firstObject');
    if(!providerData) {
      return {
        email: this.get('session.currentUser.email'),
        user: this.get('session.currentUser.user'),
      };
    }
    var currentUser =  {
      email: providerData.email,
      photoURL: providerData.photoURL,
      displayName: providerData.displayName || providerData.email,
      user: this.get('session.currentUser.user'),
    };

    return currentUser;
  }.property('session.currentUser.providerData[]','session.currentUser','session.currentUser.user'),


  createUserIfDoesNotExist(provider,uid,email,providerData){
    return new Ember.RSVP.Promise((resolve, reject) => {
      this.get('store').find('user', uid).then((user)=>{
        //update user if needed
        if(providerData && providerData.currentUser){
          let userData = providerData.currentUser;
          if(providerData.currentUser.providerData && providerData.currentUser.providerData[0])
            userData = providerData.currentUser.providerData[0];

          if(user.get('email') !== userData.email && userData.email) {
            user.set('email', userData.email);
          }
          if(user.get('displayName') !== userData.displayName) {
            user.set('displayName', userData.displayName);
          }
          if(user.get('photoURL') !== userData.photoURL) {
            user.set('photoURL', userData.photoURL);
          }

          user.save().finally(()=>{
            resolve(user);
          });
        }
        else{
          resolve(user);
        }
      }).catch(()=>{
        //create user record
        let user = this.get('store').createRecord('user', {
          id: uid,
          email: email,
          provider: provider,
          createdOn: new Date().getTime()
        });
        if(providerData && providerData.currentUser){
          user.set('email', providerData.currentUser.email);
          user.set('displayName', providerData.currentUser.displayName);
          user.set('photoURL', providerData.currentUser.photoURL);
        }
        let notebook = this.get('store').createRecord('notebook', {user:user, title: "My first notebook"});
        user.save().then(() => {
          notebook.save();
          resolve(user);
        }).catch(error => {
          console.error(error);
          reject("Failed to create account.");
        });
      });
      return;
    });
  },

  setUser: function() {
    let uid = this.get('session.uid');
    return this.get('store').find('user', uid).then(user => {
      return this.set('session.currentUser.user', user);
    }).catch((e) => {
      console.log(e);
      throw e;
    });
  },
  signUp: function(provider, email, password) {
    return new Ember.RSVP.Promise((resolve, reject) => {
      this.get('firebaseApp').auth().createUserWithEmailAndPassword(email, password).
        then((data) => {
        this.createUserIfDoesNotExist(provider, data.uid, email).then(resolve).catch(reject);
      }).catch(reject);
    }).catch(error => {
      if (error.message) {
        throw error.message;
      }
      throw 'Enter a valid email and password and try again.';
    });
  },

  signIn: function(provider, email, password) {
    return new Ember.RSVP.Promise((resolve, reject) => {
      this.get("session").open("firebase", {
        provider: provider,
        email: email,
        password: password
      }).then(data => {
        let providerData;
        if(provider === 'google'){
          email = data.currentUser.email;
          providerData = data;
        }
        return this.createUserIfDoesNotExist(provider,data.uid, email, providerData).then(()=>{
          return this.setUser().then(resolve).catch(reject);
        }).catch(reject);
      }).catch(reject);
    }).catch(error => {
      if (error.message) {
        throw error.message;
      }
      throw 'Enter a valid email and password and try again.';
    });
  },

  signOut: function() {
    let store = this.get('store');
    store.unloadAll();
    //let user = this.get('currentUser.user');
    //store.unloadRecord(user);
    this.get("session").close();
  },

  forgotPassword: function(email) {
    return new Ember.RSVP.Promise((resolve, reject) => {
      this.get('firebase').resetPassword({
        email
      }, response => {
        if (response) {
          return reject(response);
        }
        resolve();
      });
    }).catch(error => {
      if (error.message) {
        throw error.message;
      }
      throw 'Error: Enter a valid email and try again';
    });
  },

  resetPassword: function(email, oldPassword, newPassword) {

    return new Ember.RSVP.Promise((resolve, reject) => {
      this.get('firebase').changePassword({
        email, oldPassword, newPassword
      }, response => {
        if (response) {
          return reject(response);
        }
        resolve();
      });
    }).catch(error => {
      if (error.message) {
        throw error.message;
      }
      throw 'Error: Enter a valid email and password and try again';
    });

  }
});