package org.itstep;

import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.HashMap;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        try (ServerSocket server = new ServerSocket(9090)) {
            System.out.println("Сервер запущен");
            while (true) {
                try (
                    Socket client = server.accept();
                    Scanner input = new Scanner(client.getInputStream());
                    PrintWriter output = new PrintWriter(client.getOutputStream())
                ) {
                    System.out.println("Установлено соединение");
                    String firstRow = input.nextLine();
                    String row;
                    HashMap<String, String> headers = new HashMap<>();

                    do {
                        row = input.nextLine();
                        System.out.println(row);

                        if (row.length() > 0) {
                            String[] header = row.split(":");
                            headers.put(
                                header[0].toLowerCase(),
                                header[1].trim()
                            );
                        }
                    } while (row.length() > 0);

                    if (firstRow.contains("POST")) {
                        int length = Integer.parseInt(headers.get("content-length"));
                        byte[] bytes = new byte[length];
                        System.out.println(client.getInputStream().read(bytes, 0, length));

                        System.out.println(new String(bytes));
                    }

                    String response = "Hello, AJAX!";
                    output.println("HTTP/1.1 200 OK");
                    output.println("Content-Type: text/html; charset=UTF-8");
                    output.println("Content-Length: " + response.length());
                    output.println("Access-Control-Allow-Origin: *");
                    output.println();
                    output.println(response);
                    output.flush();
                    System.out.println("Соединение разорвано");
                } catch (Throwable e) {
                    e.printStackTrace();
                    System.out.println("Ошибка соединения");
                }
            }
        } catch (Throwable e) {
            e.printStackTrace();
        }
    }
}