import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import '../../core/app_colors.dart';
import '../../database/db_helper.dart';
import '../../models/models.dart';
import '../../services/auth_service.dart';
import '../../services/route_simulator_service.dart';

class ReviewScreen extends StatefulWidget {
  final String routeId;
  final String colonia;
  const ReviewScreen({super.key, required this.routeId, required this.colonia});
  @override State<ReviewScreen> createState() => _ReviewScreenState();
}

class _ReviewScreenState extends State<ReviewScreen> {
  int _estrellas = 5;
  final _comentCtrl = TextEditingController();
  bool _loading = false;
  bool _sent = false;

  static const _labels = ['', 'Muy malo', 'Malo', 'Regular', 'Bueno', 'Excelente'];
  static const _colors = [
    Colors.transparent, AppColors.rojoError, AppColors.naranjaAlerta,
    Colors.amber, AppColors.verdeExito, AppColors.verdeExito,
  ];

  Future<void> _enviar() async {
    final auth = context.read<AuthService>();
    if (auth.currentUser == null) return;

    // Verificar si ya calificó hoy
    final yaCalificado = await DbHelper.hasReviewedRoute(
        auth.currentUser!.id!, widget.routeId);
    if (yaCalificado && mounted) {
      ScaffoldMessenger.of(context).showSnackBar(const SnackBar(
          content: Text('Ya calificaste este servicio hoy'),
          backgroundColor: AppColors.azulInfo));
      return;
    }

    setState(() => _loading = true);
    try {
      await DbHelper.insertReview(ReviewModel(
        userId: auth.currentUser!.id!,
        colonia: widget.colonia,
        routeId: widget.routeId,
        estrellas: _estrellas,
        comentario: _comentCtrl.text.trim().isEmpty
            ? 'Sin comentario' : _comentCtrl.text.trim(),
        fecha: DateTime.now().toIso8601String(),
        nombreUsuario: auth.currentUser!.nombre,
      ));
      context.read<RouteSimulatorService>().clearReviewPrompt(widget.routeId);
      if (!mounted) return;
      setState(() { _loading = false; _sent = true; });
    } catch (e) {
      if (!mounted) return;
      setState(() => _loading = false);
      ScaffoldMessenger.of(context).showSnackBar(SnackBar(
          content: Text('Error al guardar: ${e.toString()}'),
          backgroundColor: AppColors.rojoError));
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: AppColors.grisFondo,
      appBar: AppBar(
        backgroundColor: AppColors.guindaPrimary, foregroundColor: Colors.white,
        title: const Text('Calificar el Servicio'),
        bottom: PreferredSize(preferredSize: const Size.fromHeight(4),
            child: Container(height: 4, color: AppColors.dorado)),
      ),
      body: _sent
          ? Center(child: Column(mainAxisAlignment: MainAxisAlignment.center, children: [
              const Text('', style: TextStyle(fontSize: 64)),
              const SizedBox(height: 16),
              const Text('¡Gracias por tu calificación!',
                  style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold,
                      color: AppColors.guindaPrimary)),
              const SizedBox(height: 8),
              const Text('Tu opinión ayuda a mejorar el servicio\nde recolección en Celaya.',
                  textAlign: TextAlign.center,
                  style: TextStyle(color: AppColors.grisTexto)),
              const SizedBox(height: 24),
              ElevatedButton(
                style: ElevatedButton.styleFrom(
                    backgroundColor: AppColors.guindaPrimary, foregroundColor: Colors.white),
                onPressed: () => Navigator.pop(context),
                child: const Text('Volver al inicio')),
            ]))
          : SingleChildScrollView(
              padding: const EdgeInsets.all(20),
              child: Column(children: [
                // Header
                Container(
                  width: double.infinity, padding: const EdgeInsets.all(16),
                  decoration: BoxDecoration(
                    color: AppColors.guindaPrimary.withOpacity(0.08),
                    borderRadius: BorderRadius.circular(12),
                    border: Border.all(color: AppColors.guindaPrimary.withOpacity(0.2))),
                  child: Column(children: [
                    const Icon(Icons.local_shipping, color: AppColors.guindaPrimary, size: 36),
                    const SizedBox(height: 8),
                    Text(widget.routeId, style: const TextStyle(
                        fontWeight: FontWeight.bold, color: AppColors.guindaPrimary)),
                    Text(widget.colonia, style: const TextStyle(
                        color: AppColors.grisTexto, fontSize: 12)),
                  ]),
                ),
                const SizedBox(height: 24),

                // Estrellas
                const Text('¿Cómo calificarías el servicio de hoy?',
                    style: TextStyle(fontWeight: FontWeight.bold, fontSize: 16)),
                const SizedBox(height: 16),
                Row(mainAxisAlignment: MainAxisAlignment.center, children: List.generate(5, (i) {
                  final star = i + 1;
                  return GestureDetector(
                    onTap: () => setState(() => _estrellas = star),
                    child: Padding(
                      padding: const EdgeInsets.symmetric(horizontal: 6),
                      child: Icon(
                        _estrellas >= star ? Icons.star : Icons.star_border,
                        color: _estrellas >= star ? Colors.amber : Colors.grey,
                        size: 44,
                      ),
                    ),
                  );
                })),
                const SizedBox(height: 8),
                Text(_labels[_estrellas],
                    style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold,
                        color: _colors[_estrellas])),
                const SizedBox(height: 24),

                // Comentario
                const Align(alignment: Alignment.centerLeft,
                    child: Text('Comentario (opcional)',
                        style: TextStyle(fontWeight: FontWeight.w600))),
                const SizedBox(height: 8),
                TextField(
                  controller: _comentCtrl,
                  maxLines: 4,
                  maxLength: 200,
                  decoration: const InputDecoration(
                    hintText: 'Cuéntanos cómo estuvo el servicio...',
                    border: OutlineInputBorder(),
                    filled: true, fillColor: Colors.white),
                ),
                const SizedBox(height: 20),

                // Aviso
                Container(
                  padding: const EdgeInsets.all(10),
                  decoration: BoxDecoration(color: Colors.blue.shade50,
                      borderRadius: BorderRadius.circular(8),
                      border: Border.all(color: Colors.blue.shade200)),
                  child: const Row(children: [
                    Icon(Icons.info_outline, color: AppColors.azulInfo, size: 16),
                    SizedBox(width: 6),
                    Expanded(child: Text(
                        'Tu calificación es anónima para otros ciudadanos, '
                        'pero la Direccion General la usará para mejorar el servicio.',
                        style: TextStyle(fontSize: 11, color: AppColors.azulInfo))),
                  ]),
                ),
                const SizedBox(height: 24),

                SizedBox(width: double.infinity, height: 50,
                  child: ElevatedButton.icon(
                    onPressed: _loading ? null : _enviar,
                    style: ElevatedButton.styleFrom(
                        backgroundColor: AppColors.guindaPrimary, foregroundColor: Colors.white,
                        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8))),
                    icon: _loading
                        ? const SizedBox(width: 18, height: 18,
                            child: CircularProgressIndicator(color: Colors.white, strokeWidth: 2))
                        : const Icon(Icons.star),
                    label: const Text('ENVIAR CALIFICACIÓN',
                        style: TextStyle(fontWeight: FontWeight.bold)))),
              ]),
            ),
    );
  }

  @override void dispose() { _comentCtrl.dispose(); super.dispose(); }
}