const licenceRepository = require("../repositories/licenceRepository")
const logger = require("../modules/logger")
const { DefaultError } = require("../errors/errors")

async function create({ key, productId, targetChannel }) {
    const existing = licenceRepository.findByKey(key)
    if (existing) {
        throw new DefaultError(409, "License key already exists.")
    }

    try {
        return licenceRepository.create(key, productId, targetChannel)
    } catch (error) {
        logger.error(error, ["Service", "yellow", "LICENSE", "green"])
        throw new DefaultError(500, "Please contact the maintainer")
    }
}

function getLicenseByKey(key) {
    try {
        const license = licenceRepository.findByKey(key)
        if (!license) {
            throw new DefaultError(404, "License not found.")
        }
        return license
    } catch (error) {
        if (error instanceof DefaultError) throw error
        logger.error(error, ["Service", "yellow", "LICENSE", "green"])
        throw new DefaultError(500, "Please contact the maintainer")
    }
}

async function updateStatus(id, status) {
    try {
        const result = licenceRepository.updateStatus(id, status)
        if (result.changes === 0) {
            throw new DefaultError(404, "License not found, status update failed.")
        }
        return result
    } catch (error) {
        if (error instanceof DefaultError) throw error
        logger.error(error, ["Service", "yellow", "LICENSE", "green"])
        throw new DefaultError(500, "Please contact the maintainer")
    }
}

function listByProduct(productId) {
    try {
        const licenses = licenceRepository.findByProduct(productId)
        return licenses
    } catch (error) {
        logger.error(error, ["Service", "yellow", "LICENSE", "green"])
        throw new DefaultError(500, "Please contact the maintainer")
    }
}

async function remove(id) {
    try {
        const result = licenceRepository.remove(id)
        if (result.changes === 0) {
            throw new DefaultError(404, "License not found.")
        }
        return result
    } catch (error) {
        if (error instanceof DefaultError) throw error
        logger.error(error, ["Service", "yellow", "LICENSE", "green"])
        throw new DefaultError(500, "Please contact the maintainer")
    }
}

module.exports = {
    create,
    getLicenseByKey,
    updateStatus,
    listByProduct,
    remove
}