import { User } from './connectors';
import bcrypt from 'bcrypt';
import jwt from 'jsonwebtoken';
import Constants from '../constants';

const resolvers = {
  Query: {
    user(_, args) {
      return User.find({ where: args });
    },
    allUsers: (_, args, ctx) => {
      return ctx.user.then((user) => {
          if (!user) {
            return Promise.reject('Unauthorized');
          }
          return User.all();
      });

    }
  },
  Mutation: {
    createUser: (_, data) => {
      const ret = User.create({
        firstName: data.firstName,
        lastName: data.lastName,
      })
      return ret
    },
    deleteUser: (_,args)=> {
      User.destroy({ where: args });
      return { id : args.id}
    },
    updateUser: (_,args)=> {
      User.update({  firstName: args.firstName,lastName: args.lastName },{ where: { id: args.id } });
      return { id: args.id, firstName: args.firstName,lastName: args.lastName}
    },
    login(_, { email, password }, ctx) {

      return User.findOne({ where: { email } }).then((user) => {
        if (user) {

          return bcrypt.compare(password, user.password).then((res) => {
            if (res) {

              const token = jwt.sign({
                id: user.id,
                email: user.email,
              }, Constants.SECRET);
              user.jwt = token;
              ctx.user = Promise.resolve(user);
              return user;
            }

            return Promise.reject('password incorrect');
          });
        }

        return Promise.reject('email not found');
      });
    },
    signup(_, { email, password }, ctx) {

      return User.findOne({ where: { email } }).then((existing) => {
        if (!existing) {

          return bcrypt.hash(password, 10).then(hash => User.create({
            email,
            password: hash
          })).then((user) => {
            const { id } = user;
            const token = jwt.sign({ id, email }, Constants.SECRET);
            user.jwt = token;
            ctx.user = Promise.resolve(user);
            return user;
          });
        }

        return Promise.reject('email already exists');
      });
    }
  }
};

export default resolvers;