import 'dart:convert';
import 'dart:developer';
import 'package:http/http.dart' as http;
import 'package:sudoku_app/models/sudoku_game_dto.dart';
import 'package:sudoku_app/models/unified_rank_dto.dart';
import 'package:sudoku_app/models/game_rank_dto.dart';

class PuzzleService {
  final String _baseUrl = "https://lunaticbum.kr"; // 👈 HTTPS 확인

  // 🔽 [수정] 'blockSize' 파라미터 추가
  Future<SudokuGameDto> startGame(String level, String blockSize) async {
    final response = await http.get(
      Uri.parse('$_baseUrl/puzzle/sudoku/start?level=$level&blockSizeStr=$blockSize'),
    );

    if (response.statusCode == 200) {
      final data = jsonDecode(utf8.decode(response.bodyBytes));
      return SudokuGameDto.fromJson(data);
    } else {
      throw Exception('게임 로딩 실패: ${response.statusCode}');
    }
  }

  // 🔽 [수정] puzzleId 대신 question, answer, blockSize를 전송
  Future<bool> validateSolution(String question, String answer, int blockSize) async {
    final response = await http.post(
      Uri.parse('$_baseUrl/puzzle/sudoku/validate'),
      headers: {'Content-Type': 'application/json'},
      body: jsonEncode({
        'question': question, // 👈 [수정]
        'answer': answer,
        'blockSize': blockSize, // 👈 [수정]
      }),
    );

    if (response.statusCode == 200) {
      return jsonDecode(response.body)['correct'] ?? false;
    } else {
      log("정답 확인 실패: ${response.statusCode}");
      log("응답 본문: ${response.body}"); 
      throw Exception('정답 확인 실패: ${response.statusCode}');
    }
  }

  
  // POST /api/ranks/submit
  Future<void> submitRank(UnifiedRankDto rankDto) async {
    final response = await http.post(
      Uri.parse('$_baseUrl/api/ranks/submit'),
      headers: {'Content-Type': 'application/json'},
      body: jsonEncode(rankDto.toJson()),
    );

    if (response.statusCode != 200) {
      try {
        final errorBody = utf8.decode(response.bodyBytes);
        throw Exception(errorBody);
      } catch (e) {
         throw Exception('랭킹 등록 실패: ${response.reasonPhrase}');
      }
    }
  }

  Future<List<GameRankDto>> fetchRanks(String gameType, String? contextId) async {
    final queryParams = {
      'gameType': gameType,
      if (contextId != null) 'contextId': contextId,
    };
    // 쿼리 파라미터를 포함하여 URI 생성
    final uri = Uri.parse('$_baseUrl/api/ranks/list').replace(queryParameters: queryParams);
    
    final response = await http.get(uri);

    if (response.statusCode == 200) {
      // 서버에서 [ ... ] 형태의 JSON 배열을 받음
      final List<dynamic> data = jsonDecode(utf8.decode(response.bodyBytes));
      // 각 JSON 객체를 GameRankDto로 변환
      return data.map((json) => GameRankDto.fromJson(json)).toList();
    } else {
      throw Exception('랭킹 로딩 실패');
    }
  }

}