const { Prisma } = require('prisma-binding');
const express = require('express');
const { ApolloServer } = require('apollo-server-express');
const { GraphQLServer } = require('graphql-yoga');
const { importSchema } = require('graphql-import');
const cookieParser = require('cookie-parser');
const jwt = require('jsonwebtoken');
require('dotenv').config();

const typeDefs = importSchema('./src/schema.graphql');
const Query = require('./src/resolvers/Query');
const Mutation = require('./src/resolvers/Mutation');

const db = new Prisma({
  typeDefs: './generated/prisma.graphql',
  endpoint: process.env.DB_ENDPOINT,
  secret: process.env.DB_SECRET
});

const server = new GraphQLServer({
  typeDefs,
  resolvers: {
    Mutation,
    Query
  },
  context: req => ({ ...req, db })
});

server.express.use(cookieParser());
server.express.use((req, res, next) => {
  const { token } = req.cookies;
  if (token) {
    const { userId } = jwt.verify(token, process.env.APP_SECRET);
    // add the user to future requests
    req.userId = userId;
  }
  next();
});

server.start({ //start the GraphQL server
  cors: { // only allow from frontend server (frontend_url)
    credentials: true,
    port: 4000,
    origin: ['http://localhost:3000'],
  },
}, postStart => { //callback once connection is created
  console.log(`🚀 Server now running on http://localhost:${postStart.port}`);
});

async signin(parent, { email, password }, ctx, info) {
    const user = await ctx.db.query.user({ where: { email: email } });
    if (!user) {
      throw new Error(`No such user found for the email ${email}`);
    }
    const valid = await bcrypt.compare(password, user.password);
    if (!valid) {
      throw new Error(`password is not valid!`);
    }
    const token = jwt.sign({ userId: user.id }, process.env.USER_SECRET);

    ctx.response.cookie('token', token, {
      httpOnly: true,
      maxAge: 1000 * 60 * 60 * 24 * 31,
    });
    console.log(ctx.response);
    return user;
  },

    body:
      { operationName: 'LOGIN_MUTATION',
        variables: [Object],
        query:
         'mutation LOGIN_MUTATION($email: String!, $password: String!) {\n  signin(email: $email, password: $password) {\n    id\n    name\n    email\n    __typename\n  }\n}\n' },
     _body: true,
     length: undefined },
  locals: [Object: null prototype] {},

  [Symbol(outHeadersKey)]:
   [Object: null prototype] {
     'x-powered-by': [ 'X-Powered-By', 'Express' ],
     'access-control-allow-origin': [ 'Access-Control-Allow-Origin', 'http://localhost:3000' ],
     vary: [ 'Vary', 'Origin' ],
     'access-control-allow-credentials': [ 'Access-Control-Allow-Credentials', 'true' ],
     'set-cookie':
      [ 'Set-Cookie',   'token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VySWQiOiJjanRreG5kZG9henlpMGIwMG8yamwwZzg1IiwiaWF0IjoxNTU0MDc0MDU1fQ.h617eZ1LV3yUqn01jpMaTZDTUlYQmRMxwZc1VKbSHns; Max-Age=2678400; Path=/; Expires=Wed, 01 May 2019 23:14:15 GMT; HttpOnly' ] } }