import 'package:flutter/material.dart';
import 'package:injector/injector.dart';
import 'package:professional_repository/professional_repository.dart';
import 'package:prosappco/components/general_primary_button.dart';
import 'package:prosappco/screens/professional/components/schedule_item.dart';
import 'package:prosappco/utils/schedule_validation.dart';

class ProfessionalScheduleScreen extends StatefulWidget {
  Schedules schedules;
  ProfessionalScheduleScreen({
    super.key,
    required this.schedules,
  });

  @override
  State<ProfessionalScheduleScreen> createState() =>
      _ProfessionalScheduleScreenState();
}

class _ProfessionalScheduleScreenState
    extends State<ProfessionalScheduleScreen> {
  final _repo = Injector.appInstance.get<ApiProfessionalRepository>();
  Schedules schedules = Schedules.empty;
  bool _saving = false;
  bool _dirty = false;

  @override
  void initState() {
    super.initState();
    schedules = widget.schedules;
  }

  void _update(Schedules next) {
    setState(() {
      schedules = next;
      _dirty = true;
    });
  }

  /// Saving now writes to the backend instead of just handing the object back:
  /// the old flow depended on the profile screen being saved afterwards, so
  /// leaving without that second save silently discarded everything.
  Future<void> _save() async {
    final problems = validateSchedules(schedules);
    if (problems.isNotEmpty) {
      ScaffoldMessenger.of(context).clearSnackBars();
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text(problems.first)),
      );
      return;
    }

    setState(() => _saving = true);
    try {
      await _repo.updateSchedules(schedules);
      if (!mounted) return;
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(content: Text('Horario guardado')),
      );
      Navigator.of(context).pop(schedules);
    } catch (e) {
      if (!mounted) return;
      setState(() => _saving = false);
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(
            content: Text(
                'No se pudo guardar el horario. Revisa tu conexión e inténtalo de nuevo.')),
      );
    }
  }

  Future<bool> _confirmLeave() async {
    if (!_dirty || _saving) return true;
    final leave = await showDialog<bool>(
      context: context,
      builder: (ctx) => AlertDialog(
        title: const Text('¿Salir sin guardar?'),
        content: const Text('Perderás los cambios que hiciste en tu horario.'),
        actions: [
          TextButton(
              onPressed: () => Navigator.pop(ctx, false),
              child: const Text('Seguir editando')),
          TextButton(
              onPressed: () => Navigator.pop(ctx, true),
              child: const Text('Salir sin guardar')),
        ],
      ),
    );
    return leave ?? false;
  }

  @override
  Widget build(BuildContext context) {
    return PopScope(
      canPop: false,
      onPopInvoked: (didPop) async {
        if (didPop) return;
        if (await _confirmLeave() && mounted) Navigator.of(context).pop();
      },
      child: Scaffold(
      appBar: AppBar(
        title: const Text('Horario'),
      ),
      body: SingleChildScrollView(
        child: Padding(
          padding: const EdgeInsets.symmetric(horizontal: 15),
          child: Column(
            children: [
              ScheduleItem(
                label: "Lunes",
                schedule: schedules.monday,
                onChanged: (s) {
                  _update(schedules.copyWith(monday: s));
                },
              ),
              ScheduleItem(
                label: "Martes",
                schedule: schedules.tuesday,
                onChanged: (s) {
                  _update(schedules.copyWith(tuesday: s));
                },
              ),
              ScheduleItem(
                label: "Miercoles",
                schedule: schedules.wednesday,
                onChanged: (s) {
                  _update(schedules.copyWith(wednesday: s));
                },
              ),
              ScheduleItem(
                label: "Jueves",
                schedule: schedules.thursday,
                onChanged: (s) {
                  _update(schedules.copyWith(thursday: s));
                },
              ),
              ScheduleItem(
                label: "Viernes",
                schedule: schedules.friday,
                onChanged: (s) {
                  _update(schedules.copyWith(friday: s));
                },
              ),
              ScheduleItem(
                label: "Sabado",
                schedule: schedules.saturday,
                onChanged: (s) {
                  _update(schedules.copyWith(saturday: s));
                },
              ),
              ScheduleItem(
                label: "Domingo",
                schedule: schedules.sunday,
                onChanged: (s) {
                  _update(schedules.copyWith(sunday: s));
                },
              ),
              const SizedBox(height: 20),
              GeneralPrimaryButton(
                label: _saving ? "Guardando…" : "Guardar",
                onPressed: _saving ? () {} : _save,
              ),
              const SizedBox(height: 20),
            ],
          ),
        ),
      ),
      ),
    );
  }
}