import 'dart:convert';
import 'package:http/http.dart' as http;
import 'package:p_tits_pas/models/absence_garde.dart';
import 'package:p_tits_pas/services/api/api_config.dart';
import 'package:p_tits_pas/services/auth_service.dart';

class AbsencesGardeService {
  static Future<List<AbsenceGarde>> getAbsences({String? placementId}) async {
    final token = await AuthService.getToken();
    final headers = token != null ? ApiConfig.authHeaders(token) : ApiConfig.headers;

    final uri = Uri.parse(ApiConfig.baseUrl +
        '/absences-garde' +
        (placementId != null ? '?placementId=$placementId' : ''));
    
    final res = await http.get(uri, headers: headers);
    if (res.statusCode == 200) {
      final json = jsonDecode(res.body);
      final List items = json['items'] ?? [];
      return items.map((e) => AbsenceGarde.fromJson(e)).toList();
    } else {
      throw Exception('Erreur de chargement des absences : ${res.statusCode}');
    }
  }

  static Future<AbsenceGarde> creerAbsence({
    required String idPlacement,
    required String type,
    required String dateDebut,
    required String dateFin,
    String? motif,
  }) async {
    final token = await AuthService.getToken();
    final headers = token != null ? ApiConfig.authHeaders(token) : ApiConfig.headers;

    final uri = Uri.parse('${ApiConfig.baseUrl}/absences-garde');
    final res = await http.post(
      uri,
      headers: headers,
      body: jsonEncode({
        'id_placement': idPlacement,
        'type': type,
        'date_debut': dateDebut,
        'date_fin': dateFin,
        if (motif != null) 'motif': motif,
      }),
    );
    if (res.statusCode == 201) {
      return AbsenceGarde.fromJson(jsonDecode(res.body));
    } else {
      throw Exception("Erreur de création d'absence : ${res.statusCode}");
    }
  }

  static Future<AbsenceGarde> modifierAbsence(
    String id, {
    String? dateDebut,
    String? dateFin,
    String? statut,
    String? motif,
  }) async {
    final token = await AuthService.getToken();
    final headers = token != null ? ApiConfig.authHeaders(token) : ApiConfig.headers;

    final uri = Uri.parse('${ApiConfig.baseUrl}/absences-garde/$id');
    final Map<String, dynamic> body = {};
    if (dateDebut != null) body['date_debut'] = dateDebut;
    if (dateFin != null) body['date_fin'] = dateFin;
    if (statut != null) body['statut'] = statut;
    if (motif != null) body['motif'] = motif;

    final res = await http.patch(
      uri,
      headers: headers,
      body: jsonEncode(body),
    );
    if (res.statusCode == 200) {
      return AbsenceGarde.fromJson(jsonDecode(res.body));
    } else {
      throw Exception("Erreur de modification d'absence : ${res.statusCode}");
    }
  }

  static Future<void> supprimerAbsence(String id) async {
    final token = await AuthService.getToken();
    final headers = token != null ? ApiConfig.authHeaders(token) : ApiConfig.headers;

    final uri = Uri.parse('${ApiConfig.baseUrl}/absences-garde/$id');
    final res = await http.delete(uri, headers: headers);
    if (res.statusCode != 204) {
      throw Exception("Erreur de suppression d'absence : ${res.statusCode}");
    }
  }
}