import 'dart:convert';
import 'dart:io';

import 'package:flutter/foundation.dart';
import 'package:http/http.dart' as http;
import 'package:path_provider/path_provider.dart'; // For cache storage
import 'package:file/memory.dart';

import 'sheet.dart';

class ApiClient {
  final String baseUrl =
      'http://localhost:8080/api'; // Replace with your API base URL
  String? _token; // Holds the JWT token after login

  /// Checks if the user is authenticated
  bool get isAuthenticated => _token != null;

  /// Login and store the JWT token
  Future<bool> login(String username, String password) async {
    print("Logging in...");
    try {
      final url = '$baseUrl/login';
      final response = await http.post(
        Uri.parse(url),
        headers: {'Content-Type': 'application/json'},
        body: jsonEncode({
          'email': username,
          'password': password,
        }),
      );

      if (response.statusCode == 200) {
        _token = jsonDecode(response.body);
        print('Login successful, token: $_token');
        return true;
      } else {
        print('Login failed: ${response.statusCode}, ${response.body}');
      }
    } catch (e) {
      print('Error during login: $e');
    }
    return false;
  }

  /// Logout and clear the token
  void logout() {
    _token = null;
    print('Logged out successfully.');
  }

  /// Make a GET request
  Future<http.Response?> get(String endpoint, {bool isBinary = false}) async {
    try {
      final url = '$baseUrl$endpoint';
      final headers = {
        'Authorization': 'Bearer $_token',
        if (!isBinary) 'Content-Type': 'application/json',
      };

      final response = await http.get(Uri.parse(url), headers: headers);

      if (response.statusCode == 200) {
        return response;
      } else {
        print('GET request failed: ${response.statusCode} ${response.body}');
      }
    } catch (e) {
      print('Error during GET request: $e');
    }
    return null;
  }

  /// Make a POST request
  Future<http.Response?> post(
      String endpoint, Map<String, dynamic> body) async {
    try {
      final url = '$baseUrl$endpoint';
      final headers = {
        'Authorization': 'Bearer $_token',
        'Content-Type': 'application/json',
      };

      final response = await http.post(
        Uri.parse(url),
        headers: headers,
        body: jsonEncode(body),
      );

      if (response.statusCode == 200 || response.statusCode == 201) {
        return response;
      } else {
        print('POST request failed: ${response.statusCode} ${response.body}');
      }
    } catch (e) {
      print('Error during POST request: $e');
    }
    return null;
  }

  /// Make a POST request with form data
  Future<http.Response?> postFormData(String endpoint, String body) async {
    try {
      final url = '$baseUrl$endpoint';
      final headers = {
        'Authorization': 'Bearer $_token',
        'Content-Type': 'application/x-www-form-urlencoded',
      };

      final response = await http.post(
        Uri.parse(url),
        headers: headers,
        body: body,
      );

      if (response.statusCode == 200 || response.statusCode == 201) {
        return response;
      } else {
        print(
            'POST Form Data request failed: ${response.statusCode} ${response.body}');
      }
    } catch (e) {
      print('Error during POST Form Data request: $e');
    }
    return null;
  }

  Future<List<Sheet>> fetchSheets({String sortBy = "last_opened desc"}) async {
    try {
      final bodyFormData = {
        "page": 1,
        "limit": "1000",
        "sort_by": sortBy,
      };

      print("doing post...");
      final response = await postFormData("/sheets", jsonEncode(bodyFormData));
      print("got response...");

      if (response == null) {
        print("Empty reponse");
        return List.empty();
      }

      if (response.statusCode == 200) {
        final data = jsonDecode(response.body);
        print("Data: $data");
        return (data['rows'] as List<dynamic>)
            .map((sheet) => Sheet.fromJson(sheet as Map<String, dynamic>))
            .toList();
      } else {
        print('Failed to fetch sheets with status: ${response.statusCode}');
        print('Response: ${response.body}');
      }
    } catch (e) {
      print('Error during fetching sheets: $e');
    }

    return List.empty();
  }

  Future<File?> getPdfFileCached(String sheetUuid) async {
    try {
      // Get the cache directory

      print("Creating cache dir...");
      // final cacheDir = kIsWeb
      //     ? await MemoryFileSystem().systemTempDirectory.createTemp('cache')
      //     : await getTemporaryDirectory();
      final cacheDir = await getTemporaryDirectory();
      final cachedPdfPath = '${cacheDir.path}/$sheetUuid.pdf';

      print("cache dir created");

      // Check if the file already exists in the cache
      final cachedFile = File(cachedPdfPath);

      print("file created: $cachedFile");
      if (await cachedFile.exists()) {
        print("PDF found in cache: $cachedPdfPath");
        return cachedFile;
      }

      // Make the authenticated API call

      print("getting response");
      final response = await this.get('/sheet/pdf/$sheetUuid', isBinary: true);

      print("got response");
      if (response != null && response.statusCode == 200) {
        // Save the fetched file to the cache
        //
        print("writing file...: $cachedFile");
        await cachedFile.writeAsBytes(response.bodyBytes);
        print("PDF downloaded and cached at: $cachedPdfPath");
        return cachedFile;
      } else {
        print("Failed to fetch PDF from API. Status: ${response?.statusCode}");
      }
    } catch (e) {
      print("Error fetching PDF: $e");
    }

    return null;
  }
}