/*
 * This file is part of the Fun programming language.
 * https://fun-lang.xyz/
 *
 * Copyright 2025 Johannes Findeisen <you@hanez.org>
 * Licensed under the terms of the Apache-2.0 license.
 * https://opensource.org/license/apache-2-0
 *
 * Added: 2025-12-28
 */

#include <io/socket.fun>
#include <strings.fun>

class HTTPServer(number port)
  fun _construct(this, port)
    this.port = port
    srv = TcpServer(port, 10)
    this.server = srv
    this.htdocs = "./"

  fun set_htdocs(this, path)
    this.htdocs = to_string(path)

  fun start(this)
    if (this.server.listen() <= 0)
      print("HTTPServer: failed to listen on port " + to_string(this.port))
      return 0
    print("HTTPServer: serving " + this.htdocs + " on port " + to_string(this.port))
    while true
      client_fd = this.server.accept()
      if (client_fd > 0)
        this.handle_client(client_fd)
    return 1

  fun handle_client(this, fd)
    request = sock_recv(fd, 4096)
    if (len(request) == 0)
      sock_close(fd)
      return 0

    // Basic request parsing
    lines = str_split(request, "\n")
    if (len(lines) == 0)
      sock_close(fd)
      return 0

    first_line = lines[0]
    parts = str_split(first_line, " ")
    if (len(parts) < 2)
      sock_close(fd)
      return 0

    method = parts[0]
    path = parts[1]

    if (path == "/")
      path = "/index.html"

    full_path = this.htdocs + path
    content = read_file(full_path)

    if (len(content) > 0)
      this.send_response(fd, 200, "OK", content)
    else
      this.send_response(fd, 404, "Not Found", "<h1>404 Not Found</h1>")

    sock_close(fd)
    return 1

  fun send_response(this, fd, status_code, status_text, body)
    resp = "HTTP/1.1 " + to_string(status_code) + " " + status_text + "\r\n"
    resp = resp + "Content-Type: text/html\r\n"
    resp = resp + "Content-Length: " + to_string(len(body)) + "\r\n"
    resp = resp + "Connection: close\r\n"
    resp = resp + "\r\n"
    resp = resp + body
    sock_send(fd, resp)