// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileCopyrightText: Copyright (c) 2025 Runxi Yu <https://runxiyu.org>
// Adapted from template by Willow Barraco <contact@willowbarraco.fr>

use getopt;
use htmpl;
use log;
use net;
use net::dial;
use net::http;
use net::ip;
use net::tcp;
use net::uri;
use os;
use memio;
use io;
use fmt;
use bufio;
use strings;

const usage: [_]getopt::help = [
	"Lindenii Forge Server",
	('c', "config", "path to configuration file")
];

export fn main() void = {
	const cmd = getopt::parse(os::args, usage...);
	defer getopt::finish(&cmd);

	let port: u16 = 8080;
	let ip_addr: ip::addr4 = [127, 0, 0, 1];

	for (let opt .. cmd.opts) {
		switch (opt.0) {
		case 'c' => yield; // TODO: actually handle the config
		case => abort(); // unreachable
		};
	};

	const server = match (http::listen(ip_addr, port, net::tcp::reuseport, net::tcp::reuseaddr)) {
	case let this: *http::server =>
		yield this;
	case => abort("failure while listening");
	};
	defer http::server_finish(server);

	for (true) {
		const serv_req = match (http::serve(server)) {
		case let this: *http::server_request =>
			yield this;
		case =>
			log::println("failure while serving");
			continue;
		};
		defer http::serve_finish(serv_req);

		match (handlereq(serv_req.socket, &serv_req.request)) {
		case void => yield;
		case io::error => log::println("error while handling request");
		};
	};
};

export fn handlereq(conn: io::handle, request: *http::request) (void | io::error | nomem | net::uri::invalid) = {
	htmpl::write(conn, "HTTP/1.1 200 OK\r\n")?;
	htmpl::write(conn, "Content-Type: text/html\r\n\r\n")?;
	let segments = segments_from_path(request.target.raw_path)?;

	defer free_segments(segments);

	defer strings::freeall(segments);

	tp_index(conn, segments)?;
};

use strings;
use net::uri;

// The result must be freed with strings::freeall;

fn segments_from_path(s: str) ([]str | nomem | net::uri::invalid) = {
	let sp: []str = strings::split(s, "/")?;
	for (let i = 1z; i < len(sp); i += 1)
		sp[i - 1] = net::uri::percent_decode(sp[i])?;
	return sp[.. len(sp) - 1];
};

fn free_segments(ss: []str) void = {
	strings::freeall(ss);
};