const userRepository = require("../repositories/userRepository")
const bcrypt = require("bcryptjs")
const logger = require("../modules/logger")
const { DefaultError } = require("../errors/errors")

async function register({ firstName = null, lastName = null, username, password }) {
    const isUserExists = userRepository.findByUsername(username)
    if (isUserExists) {
        throw new DefaultError(409, "Username taken.")
    }
    try {
        const hashedPassword = await bcrypt.hash(password, 4)
        return userRepository.register(firstName, lastName, username, hashedPassword)
    } catch (error) {
        logger.error(error, ["Service", "yellow", "USER", "green"])
        throw new DefaultError(500, "Please contact the maintainer")
    }
}

async function remove(id) {
    const user = userRepository.findById(id)
    if (!user) {
        throw new DefaultError(404, "User not found.")
    }
    try {
        return userRepository.remove(id)
    } catch (error) {
        logger.error(error, ["Service", "yellow", "USER", "green"])
        throw new DefaultError(500, "Please contact the maintainer")
    }
}

async function changePassword(id, newPassword) {
    const user = userRepository.findById(id)
    if (!user) {
        throw new DefaultError(404, "User not found.")
    }
    try {
        const hashedPassword = await bcrypt.hash(newPassword, 4)
        return userRepository.changePassword(id, hashedPassword)
    } catch (error) {
        logger.error(error, ["Service", "yellow", "USER", "green"])
        throw new DefaultError(500, "Please contact the maintainer")
    }
}

function findById(id) {
    try {
        const user = userRepository.findById(id)
        if (!user) {
            throw new DefaultError(404, "User not found.")
        }
        return user
    } catch (error) {
        if (error instanceof DefaultError) throw error
        logger.error(error, ["Service", "yellow", "USER", "green"])
        throw new DefaultError(500, "Please contact the maintainer")
    }
}

module.exports = {
    remove,
    findById,
    register,
    changePassword,
}