const mongoose = require('mongoose');
const bcrypt = require('bcryptjs');
const jwt = require('jsonwebtoken');
const Joi = require('joi');
const DebugControl = require('../utils/debug.js');

function log({ title, parameters }) {
  DebugControl.log.functionName(title);
  DebugControl.log.parameters(parameters);
}

const Session = mongoose.Schema({
  refreshToken: {
    type: String,
    default: '',
  },
});

const userSchema = mongoose.Schema(
  {
    name: {
      type: String,
    },
    username: {
      type: String,
      lowercase: true,
      required: [true, 'can\'t be blank'],
      match: [/^[a-zA-Z0-9_-]+$/, 'is invalid'],
      index: true,
    },
    email: {
      type: String,
      required: [true, 'can\'t be blank'],
      lowercase: true,
      unique: true,
      match: [/\S+@\S+\.\S+/, 'is invalid'],
      index: true,
    },
    emailVerified: {
      type: Boolean,
      required: true,
      default: false,
    },
    password: {
      type: String,
      trim: true,
      minlength: 8,
      maxlength: 128,
    },
    avatar: {
      type: String,
      required: false,
    },
    provider: {
      type: String,
      required: true,
      default: 'local',
    },
    role: {
      type: String,
      default: 'USER',
    },
    googleId: {
      type: String,
      unique: true,
      sparse: true,
    },
    openidId: {
      type: String,
      unique: true,
      sparse: true,
    },
    githubId: {
      type: String,
      unique: true,
      sparse: true,
    },
    discordId: {
      type: String,
      unique: true,
      sparse: true,
    },
    plugins: {
      type: Array,
      default: [],
    },
    refreshToken: {
      type: [Session],
    },
  },
  { timestamps: true },
);

//Remove refreshToken from the response
userSchema.set('toJSON', {
  transform: function (_doc, ret) {
    delete ret.refreshToken;
    return ret;
  },
});

userSchema.methods.toJSON = function () {
  return {
    id: this._id,
    provider: this.provider,
    email: this.email,
    name: this.name,
    username: this.username,
    avatar: this.avatar,
    role: this.role,
    emailVerified: this.emailVerified,
    plugins: this.plugins,
    createdAt: this.createdAt,
    updatedAt: this.updatedAt,
  };
};

userSchema.methods.generateToken = function () {
  const token = jwt.sign(
    {
      id: this._id,
      username: this.username,
      provider: this.provider,
      email: this.email,
    },
    process.env.JWT_SECRET,
    { expiresIn: eval(process.env.SESSION_EXPIRY) },
  );
  return token;
};

userSchema.methods.generateRefreshToken = function () {
  const refreshToken = jwt.sign(
    {
      id: this._id,
      username: this.username,
      provider: this.provider,
      email: this.email,
    },
    process.env.JWT_REFRESH_SECRET,
    { expiresIn: eval(process.env.REFRESH_TOKEN_EXPIRY) },
  );
  return refreshToken;
};

userSchema.methods.comparePassword = function (candidatePassword, callback) {
  bcrypt.compare(candidatePassword, this.password, (err, isMatch) => {
    if (err) {
      return callback(err);
    }
    callback(null, isMatch);
  });
};

module.exports.hashPassword = async (password) => {
  const hashedPassword = await new Promise((resolve, reject) => {
    bcrypt.hash(password, 10, function (err, hash) {
      if (err) {
        reject(err);
      } else {
        resolve(hash);
      }
    });
  });

  return hashedPassword;
};

module.exports.validateUser = (user) => {
  log({
    title: 'Validate User',
    parameters: [{ name: 'Validate User', value: user }],
  });
  const schema = {
    avatar: Joi.any(),
    name: Joi.string().min(2).max(80).required(),
    username: Joi.string()
      .min(2)
      .max(80)
      .regex(/^[a-zA-Z0-9_-]+$/)
      .required(),
    password: Joi.string().min(8).max(128).allow('').allow(null),
  };

  return schema.validate(user);
};

const User = mongoose.model('User', userSchema);

module.exports = User;