const express = require("express")
const router = express.Router()
const { requireAuth } = require("./../../middleware/authmiddleware")
const bodyParser = require("body-parser")
const groups = require("./../../model/groups.js")
var multer = require("multer")
const fs = require("fs")
const path = require("path")
router.use(bodyParser.json())

router.post("/", requireAuth, async (req, res) => {
	let mygroups = await groups
		.find({ "members.userId": req.userdocument.userid })
		.lean()
		.select([
			"Name",
			"Description",
			"Public",
			"groupid",
			"ownerid",
			"memberscount",
		])
	return res.json(mygroups)
})

router.post("/:id", requireAuth, async (req, res) => {
	const groupid = parseInt(req.params.id)
	if (isNaN(groupid)) {
		return res.json({ status: "error", error: "Not found" })
	}

	let groupresponse = await groups
		.findOne({ groupid })
		.lean()
		.select([
			"Name",
			"Description",
			"Public",
			"groupid",
			"ownerid",
			"memberscount",
			"currentshout",
		])
		.populate({ path: "owner", select: ["username", "userid"] })

	if (!groupresponse) {
		return res.json({ status: "error", error: "Not found" })
	}

	return res.json({ status: "success", data: groupresponse })
})

router.post("/:id/members", requireAuth, async (req, res) => {
	const groupid = parseInt(req.params.id)
	const { rank } = req.body
	if (!rank) {
		return res.json({ status: "error", error: "Rank not sent" })
	}

	const resultsPerPage = 5
	let page = req.body.page ?? 0
	if (page != 0) {
		page -= 1
	}
	let skip = 0 + parseFloat(page) * resultsPerPage

	if (isNaN(groupid)) {
		return res.json({ status: "error", error: "Not found" })
	}

	let groupresponse = await groups
		.findOne({ groupid })
		.lean()
		.select({ members: { $slice: [skip, resultsPerPage] } })
		.populate({ path: "memberspoly", select: ["username", "userid"] })

	if (!groupresponse) {
		return res.json({ status: "error", error: "Not found" })
	}

	return res.json({ status: "success", data: groupresponse.memberspoly })
})

async function validateImage(groupid, res) {
	return new Promise(async resolve => {
		try {
			const myArrayBuffer = await fs.promises.readFile(
				path.resolve(`assets/groupicons/icon-${groupid}.png`),
				null,
			)
			pngValidator(myArrayBuffer)
			// success
		} catch {
			// file is invalid or corrupt
			fs.unlink(
				path.resolve(`assets/groupicons/icon-${groupid}.png`),
				err => {
					if (err) console.log(err)
				},
			)

			return res.json({ status: "error", error: "Image is invalid." })
		}

		resolve()
	})
}

var storage = multer.diskStorage({
	destination: function (req, file, cb) {
		// Uploads is the Upload_folder_name
		cb(null, "./assets/groupicons")
	},
	filename: async function (req, file, cb) {
		const groupid = await groups.countDocuments()
		cb(null, "icon-" + groupid + ".png")
	},
})
const uploadicon = multer({
	storage: storage,
	fileFilter: function (req, file, callback) {
		if (file.mimetype != "image/png") {
			return callback("Invalid file type")
		}
		callback(null, true)
	},
	limits: { fileSize: 1024 * 1024 }, // 1mb
})

router.post("/create", requireAuth, async (req, res) => {
	if (req.userdocument.coins < 100) {
		return res.json({
			status: "error",
			error: "You don't have enough Rocks!",
		})
	}
	uploadicon.single("groupicon")(req, res, async function (err) {
		if (err) {
			if (err?.message === "File too large") {
				return res
					.status(400)
					.send({
						status: "error",
						error: "File too large! 1MB Limit",
					})
			}
			if (err === "Invalid file type") {
				return res
					.status(400)
					.send({ status: "error", error: "Invalid file type" })
			}
			return res.status(400).send({ status: "error", error: err.message })
		}

		var xss = require("xss")
		const { groupname, description, publicgroup } = req.body

		if (!groupname) {
			return res.json({
				status: "error",
				error: "Group name needs to be sent.",
			})
		}
		if (!description) {
			return res.json({
				status: "error",
				error: "Description needs to be sent.",
			})
		}
		if (!publicgroup) {
			return res.json({
				status: "error",
				error: "Public group needs to be sent.",
			})
		}
		if (publicgroup != "true" && type != "false") {
			return res.json({
				status: "error",
				error: "Public group needs to be a true or false value.",
			})
		}

		const groupid = await groups.countDocuments()
		// check if the file they just uploaded is valid
		await validateImage(groupid, res)
		let IconApproved = req.userdocument.admin === false ? false : true

		await groups.create({
			Name: xss(groupname),
			Description: xss(description),
			Public: publicgroup,
			IconApproved,
			groupid,
			ownerid: req.userdocument.userid,
			memberscount: 1,
			members: [{ userId: req.userdocument.userid, rank: 3 }],
			Roles: [
				{
					RoleName: "Members",
					Permissions: {
						Shout: false,
						Kick: false,
						ChangeRoles: false,
						ModerateWall: false,
						ManageAllies: false,
					},
					Rank: 1,
				},
				{
					RoleName: "Admin",
					Permissions: {
						Shout: true,
						Kick: true,
						ChangeRoles: true,
						ModerateWall: true,
						ManageAllies: false,
					},
					Rank: 2,
				},
				{ RoleName: "Owner", Permissions: { All: true }, Rank: 3 },
			],
		})

		return res.json({ status: "success", message: "Group created!" })
	})
})

router.post("/editgroup", requireAuth, async (req, res) => {})

router.post("/postshout", requireAuth, async (req, res) => {})

router.post("/joingroup", requireAuth, async (req, res) => {})

router.post("/leavegroup", requireAuth, async (req, res) => {})

router.post("/exile", requireAuth, async (req, res) => {})

module.exports = router