package main;

import controller.CrawlerController;
import model.ResultContainer;
import model.CrawlResult;
import view.CrawlerView;
import exception.NetworkException;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class CrawlerCLI {
    public static void main(String[] args) {
        CrawlerView view = new CrawlerView();
        CrawlerController controller = new CrawlerController(view);

        view.showWelcome();

        if (args.length > 0) {
            handleCommandLineArgs(view, controller, args);
        } else {
            runInteractiveMode(view, controller);
        }

        view.showGoodbye();
    }

    private static void handleCommandLineArgs(CrawlerView view, CrawlerController controller, String[] args) {
        String command = args[0].toLowerCase();

        switch (command) {
            case "dangdang":
            case "1":
                runDangDang(view, controller);
                break;
            case "weather":
            case "2":
                runWeather(view, controller);
                break;
            case "maoyan":
            case "3":
                runMaoyan(view, controller);
                break;
            case "train":
            case "4":
                runTrain12306(view, controller);
                break;
            case "csdn":
            case "7":
                runCsdn(view, controller);
                break;
            case "all":
            case "5":
                controller.runAllCrawlers();
                break;
            case "help":
            case "6":
            case "-h":
            case "--help":
                view.showUsage();
                break;
            default:
                view.showError("未知命令: " + command);
                view.showUsage();
        }
    }

    private static void runDangDang(CrawlerView view, CrawlerController controller) {
        view.showHeader("当当网图书爬虫");
        ResultContainer<List<CrawlResult>> result = controller.runDangDangCrawler();
        if (result.isFailure() && result.getMessage().contains("网络")) {
            System.out.println();
            System.out.println("============================================");
            System.out.println("!!! IOException: 网络异常 - " + result.getMessage());
            System.out.println("!!! 原因: " + "无网络连接或目标网站不可达");
            System.out.println("============================================");
            System.exit(1);
        }
    }

    private static void runWeather(CrawlerView view, CrawlerController controller) {
        view.showHeader("中国天气网爬虫");
        ResultContainer<List<CrawlResult>> result = controller.runWeatherCrawler();
        if (result.isFailure() && result.getMessage().contains("网络")) {
            System.out.println();
            System.out.println("============================================");
            System.out.println("!!! IOException: 网络异常 - " + result.getMessage());
            System.out.println("!!! 原因: " + "无网络连接或目标网站不可达");
            System.out.println("============================================");
            System.exit(1);
        }
    }

    private static void runMaoyan(CrawlerView view, CrawlerController controller) {
        view.showHeader("猫眼电影爬虫");
        ResultContainer<List<CrawlResult>> result = controller.runMaoyanMovieCrawler();
        if (result.isFailure() && result.getMessage().contains("网络")) {
            System.out.println();
            System.out.println("============================================");
            System.out.println("!!! IOException: 网络异常 - " + result.getMessage());
            System.out.println("!!! 原因: " + "无网络连接或目标网站不可达");
            System.out.println("============================================");
            System.exit(1);
        }
    }

    private static void runTrain12306(CrawlerView view, CrawlerController controller) {
        view.showHeader("12306火车票爬虫");
        ResultContainer<List<CrawlResult>> result = controller.runTrain12306Crawler();
        if (result.isFailure() && result.getMessage().contains("网络")) {
            System.out.println();
            System.out.println("============================================");
            System.out.println("!!! IOException: 网络异常 - " + result.getMessage());
            System.out.println("!!! 原因: " + "无网络连接或目标网站不可达");
            System.out.println("============================================");
            System.exit(1);
        }
    }

    private static void runCsdn(CrawlerView view, CrawlerController controller) {
        view.showHeader("CSDN博客爬虫");
        ResultContainer<List<CrawlResult>> result = controller.runCsdnBlogCrawler();
        if (result.isFailure() && result.getMessage().contains("网络")) {
            System.out.println();
            System.out.println("============================================");
            System.out.println("!!! IOException: 网络异常 - " + result.getMessage());
            System.out.println("!!! 原因: " + "无网络连接或目标网站不可达");
            System.out.println("============================================");
            System.exit(1);
        }
    }

    private static void runInteractiveMode(CrawlerView view, CrawlerController controller) {
        boolean running = true;

        while (running) {
            view.showMenu(getDefaultMenu());
            String input = view.readInput();

            if (input == null || input.trim().isEmpty()) {
                view.showWarning("请输入有效选项");
                continue;
            }

            switch (input.trim()) {
                case "1":
                    runDangDang(view, controller);
                    break;
                case "2":
                    runWeather(view, controller);
                    break;
                case "3":
                    runMaoyan(view, controller);
                    break;
                case "4":
                    runTrain12306(view, controller);
                    break;
                case "5":
                    controller.runAllCrawlers();
                    break;
                case "6":
                    view.showUsage();
                    break;
                case "7":
                    runCsdn(view, controller);
                    break;
                case "0":
                case "exit":
                case "quit":
                    running = false;
                    break;
                default:
                    view.showError("无效选项: " + input.trim());
            }
        }
    }

    private static Map<String, String> getDefaultMenu() {
        Map<String, String> menu = new HashMap<>();
        menu.put("1", "当当网图书爬虫");
        menu.put("2", "中国天气网爬虫");
        menu.put("3", "豆瓣电影Top250爬虫");
        menu.put("4", "12306火车票爬虫");
        menu.put("5", "运行所有爬虫");
        menu.put("6", "查看使用说明");
        menu.put("7", "CSDN博客爬虫");
        menu.put("0", "退出系统");
        return menu;
    }
}