require("dotenv").config()

let registrationOpen, branding;

const { sendInfo } = require("./src/telegram")

function loadEnv() {
	registrationOpen = process.env.REGISTRATION_OPEN === "true"
	branding = {
		title: process.env.BRANDING_TITLE || "SAR Link",
		logo: process.env.BRANDING_LOGO || "/public/logo.png",
		bankDetails: {
			name: process.env.BANK_NAME || "Bank Name",
			accountNumber: process.env.ACCOUNT_NUMBER || "1234567890",
			accountName: process.env.ACCOUNT_NAME || "Account Name",
		},
		price: {
			normal: process.env.PRICE || "100",
			roaming: process.env.ROAMING_PRICE || "50",
			gaming: process.env.GAMING_PRICE || "100",
			currency: process.env.PRICE_CURRENCY || "MVR",
		}
	}
}
loadEnv()

// watch for changes to .env file
const path = require("path")
const fs = require("fs")
fs.watchFile(path.join(__dirname, ".env"), (curr, prev) => {
	delete require.cache[require.resolve("dotenv")]
	require("dotenv").config({ override: true })
	loadEnv()
	console.log(`Registration is now ${registrationOpen ? "open" : "closed"}`)
})

// initialize express
const express = require("express")
const app = express()
app.set("view engine", "ejs")
app.set("views", "./src/views")
app.use("/public", express.static("./src/public"))
app.use(express.json())
app.use(express.urlencoded({ extended: true }))

// add multer
const multer = require("multer")
if (!fs.existsSync("uploads")) fs.mkdirSync("uploads", { recursive: true })
if (!fs.existsSync("registrations.csv")) fs.writeFileSync("registrations.csv", "Customer Name,MAC Address,Device Name,Roaming,Gaming,Wired,Receipt\n", { encoding: "utf-8" });
const upload = multer({
	storage: multer.diskStorage({
		destination: (req, file, cb) => {
			cb(null, "./uploads")
		},
		filename: (req, file, cb) => {
			cb(null, `${Date.now()}- ${req.body["device_name"]} - ${file.originalname}`)
		},
	})
})
// app.use(upload.single("receipt"))

// routes
app.get("/", (req, res) => {
	res.render(registrationOpen ? "index" : "closed", { branding, message: "" })
});

app.post("/register", upload.single("transfer_receipt"), (req, res) => {
	if (!registrationOpen) {
		res.render("closed")
		return;
	}

	const { customer_name, mac_address, device_name, is_roaming, is_gaming } = req.body
	const receipt = req.file;

	if (!customer_name || !mac_address || !device_name || !receipt) {
		res.render("index", { branding, message: "Please fill all fields" })
		return;
	}

	// save info to csv file
	const csv = `${customer_name},${mac_address},${device_name},${is_roaming === "on" ? "true" : "false"},${is_gaming === "on" ? "true" : "false"},false,${receipt.path}\n`
	fs.appendFile("registrations.csv", csv, (err) => {
		if (err) {
			console.error(err)
			res.render("index", { branding, message: "An internal error occurred" })
		}
	});

	// send receipt to telegram
	sendInfo(receipt.path, { customer_name, mac_address, device_name, is_roaming, is_gaming })
		.then(() => {
			res.render("success", { branding })
		})
		.catch((error) => {
			console.error(error)
			res.render("index", { branding, message: "An internal error occurred" })
		})
})

const port = process.env.PORT || 4818;
app.listen(port, '0.0.0.0', () => {
	console.log(`Server is running on port ${port}`);
});