use getopt;
use net;
use net::ip;
use net::http;
use net::dial;
use os;
use memio;
use io;
use fmt;
use bufio;
use strings;

const usage: [_]getopt::help = [
	"HTTP server",
	('a', "address", "listened address (ex: 127.0.0.1:8080)")
];

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 i = 0z; i < len(cmd.opts); i += 1) {
		const opt = cmd.opts[i];
		switch (opt.0) {
		case 'a' =>
			match (dial::splitaddr(opt.1, "")) {
			case let value: (str, u16) =>
				ip_addr = ip::parsev4(value.0)!;
				port = value.1;
			case dial::invalid_address =>
				abort("Invalid address");
			};
		case => abort(); // unreachable
		};
	};

	const server = match (http::listen(ip_addr, port)) {
	case let this: *http::server =>
		yield this;
	case net::error => 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 net::error => abort("failure while serving");
		};
		defer http::serve_finish(serv_req);

		let buf = memio::dynamic();
		defer io::close(&buf)!;
		handlereq(&buf, &serv_req.request);

		http::response_write(
			serv_req.socket,
			http::STATUS_OK,
			&buf,
			("Content-Type", "text/plain")
		)!;
	};
};

export fn handlereq(buf: *io::stream, request: *http::request) void = {
	fmt::fprintfln(buf, "Method: {}", request.method)!;
	fmt::fprintfln(buf, "Path: {}", request.target.path)!;
	fmt::fprintfln(buf, "Fragment: {}", request.target.fragment)!;
	fmt::fprintfln(buf, "Query: {}", request.target.query)!;
	fmt::fprintfln(buf, "Headers: <<EOF")!;
	http::write_header(buf, &request.header)!;
	fmt::fprintfln(buf, "EOF")!;

	match (request.body) {
	case void => void;
	case let body: io::handle =>
		fmt::fprintfln(buf, "Body: <<EOF")!;
		for (true) {
			match (bufio::read_line(body)!) {
			case let line: []u8 =>
				fmt::fprintln(buf, strings::fromutf8(line)!)!;
				break;
			case io::EOF =>
				break;
			};
		};
		fmt::fprintfln(buf, "EOF")!;
	};
};