import 'package:flutter/material.dart';
import 'package:provider/provider.dart';

import '../labels.dart';
import '../models/models.dart';
import '../services/auth_controller.dart';
import '../ui/feedback.dart';
import 'service_point_form_screen.dart';

class ServicePointsScreen extends StatefulWidget {
  const ServicePointsScreen({super.key});

  @override
  State<ServicePointsScreen> createState() => _ServicePointsScreenState();
}

class _ServicePointsScreenState extends State<ServicePointsScreen> {
  final _search = TextEditingController();
  String? _district;
  List<ServicePoint>? _points;
  bool _loading = true;

  @override
  void initState() {
    super.initState();
    _load();
  }

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

  Future<void> _load() async {
    try {
      final points = await context.read<AuthController>().api.servicePoints(
        district: _district,
        search: _search.text.trim(),
      );
      if (!mounted) return;
      setState(() {
        _points = points;
        _loading = false;
      });
    } catch (error) {
      if (!mounted) return;
      setState(() => _loading = false);
      showError(context, error);
    }
  }

  @override
  Widget build(BuildContext context) {
    final role = context.watch<AuthController>().user?.role;
    final points = _points ?? [];
    if (_loading && _points == null) {
      return const Center(child: CircularProgressIndicator());
    }

    return Scaffold(
      floatingActionButton: role == 'dealer'
          ? null
          : FloatingActionButton.extended(
              onPressed: () async {
                final created = await Navigator.of(context).push<bool>(
                  MaterialPageRoute(builder: (_) => const ServicePointFormScreen()),
                );
                if (created == true) _load();
              },
              icon: const Icon(Icons.add),
              label: const Text('Add point'),
            ),
      body: RefreshIndicator(
        onRefresh: _load,
        child: ListView(
          padding: const EdgeInsets.fromLTRB(16, 12, 16, 96),
          children: [
            DropdownButtonFormField<String>(
              initialValue: _district,
              isExpanded: true,
              decoration: const InputDecoration(labelText: 'District'),
              items: [
                const DropdownMenuItem(value: null, child: Text('All districts')),
                for (final district in sriLankaDistricts)
                  DropdownMenuItem(value: district, child: Text(district)),
              ],
              onChanged: (value) {
                setState(() => _district = value);
                _load();
              },
            ),
            const SizedBox(height: 12),
            TextField(
              controller: _search,
              decoration: const InputDecoration(
                labelText: 'Search',
                hintText: 'Name, repair work, phone',
              ),
              onSubmitted: (_) => _load(),
            ),
            const SizedBox(height: 12),
            Align(
              alignment: Alignment.centerLeft,
              child: FilledButton(onPressed: _load, child: const Text('Search')),
            ),
            const SizedBox(height: 12),
            if (points.isEmpty)
              const Padding(
                padding: EdgeInsets.symmetric(vertical: 32),
                child: Center(child: Text('No service points match.')),
              ),
            for (final point in points)
              Card(
                child: ListTile(
                  title: Text(point.name),
                  subtitle: Text(
                    [
                      point.district,
                      if (point.address != null && point.address!.isNotEmpty) point.address,
                      if (point.phone != null && point.phone!.isNotEmpty) point.phone,
                      if (point.notes != null && point.notes!.isNotEmpty) point.notes,
                    ].join('\n'),
                  ),
                ),
              ),
          ],
        ),
      ),
    );
  }
}