import { NextApiRequest } from 'next'
import rateLimit from 'express-rate-limit'
import { MessageEmbed } from 'discord.js'

import { CaptchaVerify, get, put, remove, update } from '@utils/Query'
import ResponseWrapper from '@utils/ResponseWrapper'
import { checkToken } from '@utils/Csrf'
import { AddBotSubmit, AddBotSubmitSchema, CsrfCaptcha, ManageBot, ManageBotSchema } from '@utils/Yup'
import RequestHandler from '@utils/RequestHandler'
import { User } from '@types'
import { checkUserFlag, diff, inspect, makeDiscordCodeblock, objectDiff, serialize } from '@utils/Tools'
import { discordLog, getBotReviewLogChannel } from '@utils/DiscordBot'
import { KoreanbotsEndPoints } from '@utils/Constants'

const patchLimiter = rateLimit({
	windowMs: 2 * 60 * 1000,
	max: 2,
	handler: (_req, res) => ResponseWrapper(res, { code: 429 }),
	keyGenerator: (req) => req.headers['x-forwarded-for'] as string,
	skip: (_req, res) => {
		res.removeHeader('X-RateLimit-Global')
		return false
	}
})
const Bots = RequestHandler()
	.get(async (req: GetApiRequest, res) => {
		const bot = await get.bot.load(req.query.id)
		if (!bot) return ResponseWrapper(res, { code: 404, message: '존재하지 않는 봇입니다.' })
		else return ResponseWrapper(res, { code: 200, data: bot })
	})
	.post(async (req: PostApiRequest, res) => {
		const user = await get.Authorization(req.cookies.token)
		if (!user) return ResponseWrapper(res, { code: 401 })
		const csrfValidated = checkToken(req, res, req.body._csrf)
		if (!csrfValidated) return

		const validated = await AddBotSubmitSchema.validate(req.body, { abortEarly: false })
			.then(el => el)
			.catch(e => {
				ResponseWrapper(res, { code: 400, errors: e.errors })
				return null
			})

		if (!validated) return
		if (validated.id !== req.query.id)
			return ResponseWrapper(res, { code: 400, errors: ['요청 주소와 Body의 정보가 다릅니다.'] })
		const captcha = await CaptchaVerify(validated._captcha)
		if(!captcha) return ResponseWrapper(res, { code: 400, message: '캡챠 검증에 실패하였습니다.' })
		const result = await put.submitBot(user, validated)
		if (result === 1)
			return ResponseWrapper(res, {
				code: 403,
				message: '이미 대기중인 봇이 있습니다.',
				errors: [
					'한 번에 최대 2개의 봇까지만 신청하실 수 있습니다.\n다른 봇들의 심사가 완료된 뒤에 신청해주세요.',
				],
			})
		else if (result === 2)
			return ResponseWrapper(res, {
				code: 406,
				message: '해당 봇은 이미 심사중이거나 이미 등록되어있습니다.',
				errors: [
					'해당 아이디의 봇은 이미 심사중이거나 등록되어있습니다. 본인 소유의 봇이고 신청하신 적이 없으시다면 문의해주세요.',
				],
			})
		else if (result === 3)
			return ResponseWrapper(res, {
				code: 404,
				message: '올바르지 않은 봇 아이디입니다.',
				errors: ['해당 아이디의 봇은 존재하지 않습니다. 다시 확인해주세요.'],
			})
		else if (result === 4)
			return ResponseWrapper(res, {
				code: 403,
				message: '디스코드 서버에 참가해주세요.',
				errors: ['봇 신청하시기 위해서는 공식 디스코드 서버에 참가해주셔야합니다.'],
			})
		get.botSubmits.clear(user)

		await discordLog('BOT/SUBMIT', user, new MessageEmbed().setDescription(`[${result.id}/${result.date}](${KoreanbotsEndPoints.URL.submittedBot(result.id, result.date)})`), {
			content: inspect(serialize(result)),
			format: 'js'
		})
		const userinfo = await get.user.load(user)
		await getBotReviewLogChannel().send(new MessageEmbed().setAuthor(`${userinfo.username}#${userinfo.tag}`, KoreanbotsEndPoints.CDN.avatar(userinfo.id, { format: 'png', size: 256 }), KoreanbotsEndPoints.URL.user(userinfo.id)).setTitle('대기 중').setColor('GREY').setDescription(`[${result.id}/${result.date}](${KoreanbotsEndPoints.URL.submittedBot(result.id, result.date)})`).setTimestamp())
		return ResponseWrapper(res, { code: 200, data: result })
	})
	.delete(async (req: DeleteApiRequest, res) => {
		const user = await get.Authorization(req.cookies.token)
		if (!user) return ResponseWrapper(res, { code: 401 })
		const bot = await get.bot.load(req.query.id)
		if(!bot) return ResponseWrapper(res, { code: 404, message: '존재하지 않는 봇입니다.' })
		if((bot.owners as User[])[0].id !== user) return ResponseWrapper(res, { code: 403 })
		const userInfo = await get.user.load(user)
		if(['reported', 'blocked', 'archived'].includes(bot.state) && !checkUserFlag(userInfo?.flags, 'staff')) return ResponseWrapper(res, { code: 403, message: '해당 봇은 수정할 수 없습니다.', errors: ['오류라고 생각되면 문의해주세요.'] })
		const csrfValidated = checkToken(req, res, req.body._csrf)
		if (!csrfValidated) return
		const captcha = await CaptchaVerify(req.body._captcha)
		if(!captcha) return ResponseWrapper(res, { code: 400, message: '캡챠 검증에 실패하였습니다.' })
		if(req.body.name !== bot.name) return ResponseWrapper(res, { code: 400, message: '봇 이름을 입력해주세요.' })
		remove.bot(bot.id)
		get.user.clear(user)
		await discordLog('BOT/DELETE', user, (new MessageEmbed().setDescription(`${bot.name} - <@${bot.id}> ([${bot.id}](${KoreanbotsEndPoints.URL.bot(bot.id)}))`)),
			{
				content: inspect(bot),
				format: 'js'
			}
		)
		return ResponseWrapper(res, { code: 200, message: '성공적으로 삭제했습니다.' })
	})
	.patch(patchLimiter).patch(async (req: PatchApiRequest, res) => {
		const bot = await get.bot.load(req.query.id)
		if(!bot) return ResponseWrapper(res, { code: 404, message: '존재하지 않는 봇입니다.' })
		const user = await get.Authorization(req.cookies.token)
		if (!user) return ResponseWrapper(res, { code: 401 })
		const userInfo = await get.user.load(user)
		if(['reported', 'blocked', 'archived'].includes(bot.state) && !checkUserFlag(userInfo?.flags, 'staff')) return ResponseWrapper(res, { code: 403, message: '해당 봇은 수정할 수 없습니다.', errors: ['오류라고 생각되면 문의해주세요.'] })
		if(!(bot.owners as User[]).find(el => el.id === user) && !checkUserFlag(userInfo?.flags, 'staff')) return ResponseWrapper(res, { code: 403 })
		const csrfValidated = checkToken(req, res, req.body._csrf)
		if (!csrfValidated) return

		const validated = await ManageBotSchema.validate(req.body, { abortEarly: false })
			.then(el => el)
			.catch(e => {
				ResponseWrapper(res, { code: 400, errors: e.errors })
				return null
			})

		if (!validated) return
		const result = await update.bot(req.query.id, validated)
		if(result === 0) return ResponseWrapper(res, { code: 400 })
		else {
			get.bot.clear(req.query.id)
			const embed = new MessageEmbed().setDescription(`${bot.name} - <@${bot.id}> ([${bot.id}](${KoreanbotsEndPoints.URL.bot(bot.id)}))`)
			const diffData = objectDiff(
				{ prefix: bot.prefix, library: bot.lib, web: bot.web, git: bot.git, url: bot.url, discord: bot.discord, intro: bot.intro, category: JSON.stringify(bot.category) },
				{ prefix: validated.prefix, library: validated.library, web: validated.website, git: validated.git, url: validated.url, discord: validated.discord, intro: validated.intro, category: JSON.stringify(validated.category)  }
			)
			diffData.map(d => {
				embed.addField(d[0], makeDiscordCodeblock(diff(d[1][0] || '', d[1][1] || ''), 'diff'))
			})
			await discordLog('BOT/EDIT', user, embed,
				{
					content: `--- 설명\n${diff(bot.desc, validated.desc, true)}`,
					format: 'diff'
				}
			)
			return ResponseWrapper(res, { code: 200 })
		}
		
	})

interface GetApiRequest extends NextApiRequest {
	query: {
		id: string
	}
}

interface PostApiRequest extends GetApiRequest {
	body: AddBotSubmit | null
}

interface PatchApiRequest extends GetApiRequest {
	body: ManageBot | null
}

interface DeleteApiRequest extends GetApiRequest {
		body: CsrfCaptcha & { name: string } | null
}

export default Bots
