import 'dart:convert';
import 'package:http/http.dart' as http;
import 'package:flutter/material.dart';

import '../models/work_day.dart';
import '../models/work_interval.dart';
import '../utils/helpers.dart';

class BookingApi {
  final String host;
  final String path;
  final http.Client client;

  const BookingApi({
    required this.client,
    this.host = 'api.windesign.at',
    this.path = '/workinghours.php',
  });

  Future<List<WorkDay>> getBookingList(DateTime monthStart) async {
    final y = monthStart.year.toString().padLeft(4, '0');
    final m = monthStart.month.toString().padLeft(2, '0');
    final uri = Uri.https(host, path, {
      'module': 'booking',
      'function': 'getList',
      'date': '$y-$m',
    });

    http.Response res;
    try {
      res = await client
          .get(uri, headers: {'Accept': 'application/json'})
          .timeout(const Duration(seconds: 15));
    } on http.ClientException catch (e) {
      throw Exception('ClientException: ${e.message} (uri=$uri)');
    } on Object catch (e) {
      throw Exception('Network error: $e (uri=$uri)');
    }

    if (res.statusCode != 200) {
      throw Exception('HTTP ${res.statusCode}: ${res.body}');
    }

    final map = jsonDecode(res.body) as Map<String, dynamic>;
    final List items = map['bookings'] ?? [];
    final out = <WorkDay>[];

    for (final row in items) {
      final d = DateTime.parse(row['bookingDay'] as String);
      final isWeekend = d.weekday == DateTime.saturday || d.weekday == DateTime.sunday;
      final target = isWeekend ? 0 : 8 * 60;

      final intervals = <WorkInterval>[];
      TimeOfDay? p(dynamic v) => parseHHMM(v);
      void addPair(String a, String b) {
        final s = p(row[a]);
        final e = p(row[b]);
        if (s != null && e != null) intervals.add(WorkInterval(s, e));
      }
      addPair('come1', 'leave1');
      addPair('come2', 'leave2');
      addPair('come3', 'leave3');
      addPair('come4', 'leave4');
      addPair('come5', 'leave5');

      final absence =
          (row['code']?.toString().trim().isEmpty ?? true) ? null : row['code'].toString();

      out.add(WorkDay(
        date: d,
        intervals: intervals,
        targetMinutes: target,
        absenceType: absence,
      ));
    }

    out.sort((a, b) => a.date.compareTo(b.date));
    return out;
  }
}