import 'dart:async';
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
import 'package:path_provider/path_provider.dart';
import '../homepage/screen_homepage.dart';
import '../log/class_sitecheck.dart';
import '../log/class_sitelog.dart';

class Monitor2App extends StatefulWidget {
  const Monitor2App({super.key});

  @override
  State<Monitor2App> createState() => Monitor2AppState();
}

class Monitor2AppState extends State<Monitor2App> {
  List<SiteCheck> sites = [];
  List<SiteLog> logs = [];
  Timer? timer;
  bool isChecking = false;

  final GlobalKey<ScaffoldMessengerState> messengerKey =
      GlobalKey<ScaffoldMessengerState>();

  @override
  void initState() {
    super.initState();
    loadSites().then((_) {
      loadLogs().then((_) {
        setState(() {});
        checkAllSites();
        timer = Timer.periodic(
          const Duration(hours: 1),
          (_) => checkAllSites(),
        );
      });
    });
  }

  @override
  void dispose() {
    timer?.cancel();
    super.dispose();
  }

  Future<File> getLogFile() async {
    final dir = await getApplicationDocumentsDirectory();
    return File('${dir.path}/logs.dat');
  }

  Future<File> getSitesFile() async {
    final dir = await getApplicationDocumentsDirectory();
    return File('${dir.path}/sites.dat');
  }

  Future<void> loadLogs() async {
    try {
      final file = await getLogFile();
      if (await file.exists()) {
        final lines = await file.readAsLines();
        logs = lines.map((l) => SiteLog.fromCsv(l)).toList();
      }
    } catch (_) {}
  }

  Future<void> saveLogs() async {
    final file = await getLogFile();
    final lastLogs =
        logs.length > 10000 ? logs.sublist(logs.length - 10000) : logs;
    await file.writeAsString(lastLogs.map((l) => l.toCsv()).join('\n'));
  }

  Future<void> loadSites() async {
    try {
      final file = await getSitesFile();
      if (await file.exists()) {
        final lines = await file.readAsLines();
        sites = lines.map((l) => SiteCheck.fromLine(l)).toList();
      } else {
        sites = [
          SiteCheck('https://flutter.dev'),
          SiteCheck('https://google.com'),
        ];
        await saveSites();
      }
    } catch (_) {
      sites = [
        SiteCheck('https://flutter.dev'),
        SiteCheck('https://google.com'),
      ];
      await saveSites();
    }
  }

  Future<void> saveSites() async {
    final file = await getSitesFile();
    final lastSites =
        sites.length > 100 ? sites.sublist(sites.length - 100) : sites;
    await file.writeAsString(lastSites.map((s) => s.toLine()).join('\n'));
  }

  Future<void> checkAllSites({bool showSnackBar = false}) async {
    if (isChecking) return;
    setState(() {
      isChecking = true;
    });

    for (var site in sites) {
      try {
        final response = await http
            .get(Uri.parse(site.url))
            .timeout(const Duration(seconds: 10));
        addLog(site.url, response.statusCode);
      } catch (e) {
        addLog(site.url, -1);
      }
    }

    setState(() {
      isChecking = false;
    });

    if (showSnackBar) {
      messengerKey.currentState?.showSnackBar(
        const SnackBar(content: Text('Vérification des sites terminée ✅')),
      );
    }
  }

  void addLog(String url, int statusCode) {
    logs.add(SiteLog(DateTime.now(), url, statusCode));
    if (logs.length > 10000) {
      logs = logs.sublist(logs.length - 10000);
    }
    saveLogs();
  }

  void addSite(String url) async {
    if (sites.length >= 100) {
      messengerKey.currentState?.showSnackBar(
        const SnackBar(content: Text('Limite de 100 sites atteinte 🚫')),
      );
      return;
    }
    setState(() {
      sites.add(SiteCheck(url));
    });
    await saveSites();
  }

  void removeSite(int index) async {
    setState(() {
      sites.removeAt(index);
    });
    await saveSites();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      scaffoldMessengerKey: messengerKey,
      title: 'Surveillance de sites',
      theme: ThemeData(primarySwatch: Colors.blue),
      home: HomePage(
        sites: sites,
        logs: logs,
        addSite: addSite,
        removeSite: removeSite,
        forceCheck: () => checkAllSites(showSnackBar: true),
        isChecking: isChecking,
      ),
    );
  }
}