userController.js

const asyncHandler=require("express-async-handler");
const User=require("../models/userModel");
const bcrypt=require("bcrypt");
const jwt=require("jsonwebtoken")
const { json } = require("express");

//@desc Register a user
//@route POST  /api/contacts
//@access public


const registerUser = asyncHandler(async(req, res) => {
    const {username, email, password}=req.body;
    if(!username || !email || !password){
        res.status(400);
        throw new Error("All fields are mandatory");
    }
   
   
    const userAvailable = await User.findOne({email});
    if(userAvailable){
        res.status(400);
        throw new Error("User Already Registered");
    }
    

    //Hash Password
    const hashedPassword=await bcrypt.hash(password,10);
    console.log("Hashed Password",hashedPassword);
    const user= await User.create({
      username,
      email,
      password:hashedPassword
    })
    console.log(`User created ${user}`);
    if(user){
      res.status(201).json({_id:user.id,email:user.email});
    }else{
      res.status(400);
      throw new Error(" user data is not valid");
    }
     res.json({message: "Register the User"});
});





//@desc Login a user
//@route POST  /api/contacts
//@access public

const loginUser=asyncHandler(async(req, res) => {
  const {email,password}=req.body;
  if(!email || !password){
    res.status(400);
    throw new Error("All fields are mandatory");
  
}
const user=await User.findOne({email});
//compare password with hashed password
if(user && (await bcrypt.compare(password,user.password))){
  const accessToken= jwt.sign({
    user:{
      username:user.username,
      email:user.email,
      id:user.id,
    },
  },
  process.env.ACCESS_TOKEN_SECRET,
  {expiresIn:"15m"}

);
  res.status(200).json({ accessToken});
}else{
  res.status(401);
  throw new Error("email or password is not valid");
}
res.json ({message: "login user"});

});

//@desc Current user info
//@route POST  /api/contacts
//@access private

const currentUser=asyncHandler(async(req, res) => {
  res.json(req.user);
});

module.exports={registerUser,loginUser,currentUser}