import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:flutter_secure_storage/flutter_secure_storage.dart';
import 'package:seshat/config/constants.dart';
import 'package:seshat/utils/result.dart';
import "package:http/http.dart" as http;

class AuthClient {
  AuthClient();
  FlutterSecureStorage? _secureStorage;

  Future<void> _initStore() async {
    _secureStorage ??= const FlutterSecureStorage(
      aOptions: AndroidOptions(encryptedSharedPreferences: true),
    );
  }

  Future<Result<bool>> hasValidToken() async {
    try {
      await _initStore();
      bool hasToken = await _secureStorage!.containsKey(key: "token");
      debugPrint("\n\n\n${hasToken == true} => HAS_TOKEN\n\n\n");
      if (hasToken) {
        var token = await _secureStorage!.read(key: "token");
        var url = Uri.parse("https://$apiBasePath/token-check");
        var response = await http.post(
          url,
          headers: {"Content-Type": "application/json"},
          body: jsonEncode({"token": token}),
        );
        debugPrint(
          "\n\n\n${response.body is String} => ${response.body}\n\n\n",
        );

        if (response.body == "true") {
          return Result.ok(true);
        }
      }
      return Result.ok(false);
    } catch (e) {
      debugPrint(e.toString());
      return Result.error(Exception(e));
    }
  }

  Future<Result<String>> login(String username, String password) async {
    var client = http.Client();
    try {
      await _initStore();
      var url = Uri.parse("https://$apiBasePath/auth");
      var response = await client.post(
        url,
        headers: {
          "Content-Type": "application/json",
          "Accept": "application/json",
        },
        body: jsonEncode({"password": password, "username": username}),
      );
      if (response.statusCode == 200) {
        var json = jsonDecode(response.body);
        await _secureStorage!.write(key: "token", value: json["access_token"]);
        return Result.ok(json["access_token"]);
      } else if (response.statusCode == 401) {
        return Result.error(Exception("Wrong credentials"));
      } else {
        return Result.error(Exception("Token creation error"));
      }
    } catch (e, stackTrace) {
      debugPrint(e.toString());
      debugPrintStack(stackTrace: stackTrace);
      return Result.error(Exception(e));
    } finally {
      client.close();
    }
  }
}