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

import '../../../../core/constants/enums.dart';
import '../../../../shared/widgets/app_button.dart';
import '../../../../shared/widgets/app_text_field.dart';
import '../../domain/entities/app_settings.dart';
import '../providers/settings_provider.dart';
import '../widgets/settings_widgets.dart';
import '../../../../shared/widgets/app_toast.dart';

class AssetSettingsScreen extends ConsumerStatefulWidget {
  const AssetSettingsScreen({super.key});

  @override
  ConsumerState<AssetSettingsScreen> createState() => _AssetSettingsScreenState();
}

class _AssetSettingsScreenState extends ConsumerState<AssetSettingsScreen> {
  final _formKey = GlobalKey<FormState>();
  late final TextEditingController _prefixController;
  late final TextEditingController _runningLengthController;
  late final TextEditingController _warrantyReminderController;
  late final TextEditingController _expiryAlertController;
  late bool _autoGenerate;
  late bool _qrEnabled;
  late String _qrFormat;
  late String _labelSize;
  late Set<String> _enabledStatuses;

  @override
  void initState() {
    super.initState();
    final asset = ref.read(appSettingsProvider).asset;
    _prefixController = TextEditingController(text: asset.codePrefix);
    _runningLengthController =
        TextEditingController(text: '${asset.runningNumberLength}');
    _warrantyReminderController =
        TextEditingController(text: '${asset.warrantyReminderDays}');
    _expiryAlertController =
        TextEditingController(text: '${asset.expiryAlertDays}');
    _autoGenerate = asset.autoGenerateCode;
    _qrEnabled = asset.qrEnabled;
    _qrFormat = asset.qrFormat;
    _labelSize = asset.labelSize;
    _enabledStatuses = asset.enabledStatuses.toSet();
  }

  @override
  void dispose() {
    _prefixController.dispose();
    _runningLengthController.dispose();
    _warrantyReminderController.dispose();
    _expiryAlertController.dispose();
    super.dispose();
  }

  Future<void> _save() async {
    if (!_formKey.currentState!.validate()) return;

    await ref.read(appSettingsProvider.notifier).updateAsset(
          AssetSettingsConfig(
            codePrefix: _prefixController.text.trim(),
            runningNumberLength: int.parse(_runningLengthController.text.trim()),
            autoGenerateCode: _autoGenerate,
            warrantyReminderDays:
                int.parse(_warrantyReminderController.text.trim()),
            expiryAlertDays: int.parse(_expiryAlertController.text.trim()),
            qrEnabled: _qrEnabled,
            qrFormat: _qrFormat,
            labelSize: _labelSize,
            enabledStatuses: _enabledStatuses.toList(),
          ),
        );

    if (mounted) {
      showAppToastFromSnackBar(context, 
        const SnackBar(content: Text('Asset settings saved')),
      );
    }
  }

  @override
  Widget build(BuildContext context) {
    final prefix = _prefixController.text.trim().isEmpty
        ? 'AST'
        : _prefixController.text.trim();
    final length = int.tryParse(_runningLengthController.text.trim()) ?? 6;
    final preview = '$prefix-${'0' * (length - 1)}1';

    return SettingsPageLayout(
      title: 'Asset Settings',
      subtitle: 'Asset codes, statuses, warranty, and QR configuration',
      child: Form(
        key: _formKey,
        child: Column(
          children: [
            SettingsFormCard(
              title: 'Asset Code Generation',
              subtitle: 'Preview: $preview',
              children: [
                AppTextField(
                  controller: _prefixController,
                  label: 'Prefix',
                  hint: 'AST, LAP, MOB',
                  onChanged: (_) => setState(() {}),
                ),
                const SizedBox(height: 16),
                AppTextField(
                  controller: _runningLengthController,
                  label: 'Running Number Length',
                  keyboardType: TextInputType.number,
                  onChanged: (_) => setState(() {}),
                ),
                SettingsSwitchTile(
                  title: 'Auto Generate Asset Code',
                  value: _autoGenerate,
                  onChanged: (v) => setState(() => _autoGenerate = v),
                ),
              ],
            ),
            const SizedBox(height: 16),
            SettingsFormCard(
              title: 'Asset Statuses',
              subtitle: 'Enable or disable statuses used in the system',
              children: AssetStatus.values.map((status) {
                return CheckboxListTile(
                  contentPadding: EdgeInsets.zero,
                  title: Text(status.label),
                  value: _enabledStatuses.contains(status.value),
                  onChanged: (checked) {
                    setState(() {
                      if (checked == true) {
                        _enabledStatuses.add(status.value);
                      } else {
                        _enabledStatuses.remove(status.value);
                      }
                    });
                  },
                );
              }).toList(),
            ),
            const SizedBox(height: 16),
            SettingsFormCard(
              title: 'Warranty Settings',
              children: [
                AppTextField(
                  controller: _warrantyReminderController,
                  label: 'Warranty Reminder Days',
                  keyboardType: TextInputType.number,
                ),
                const SizedBox(height: 16),
                AppTextField(
                  controller: _expiryAlertController,
                  label: 'Expiry Alert Days',
                  keyboardType: TextInputType.number,
                ),
              ],
            ),
            const SizedBox(height: 16),
            SettingsFormCard(
              title: 'QR Settings',
              children: [
                SettingsSwitchTile(
                  title: 'Enable QR Codes',
                  value: _qrEnabled,
                  onChanged: (v) => setState(() => _qrEnabled = v),
                ),
                SettingsDropdownField<String>(
                  label: 'QR Format',
                  value: _qrFormat,
                  items: const ['asset_id', 'asset_code', 'url'],
                  itemLabel: (v) => switch (v) {
                    'asset_id' => 'Asset ID',
                    'asset_code' => 'Asset Code',
                    'url' => 'URL Link',
                    _ => v,
                  },
                  onChanged: (v) => setState(() => _qrFormat = v!),
                ),
                const SizedBox(height: 16),
                SettingsDropdownField<String>(
                  label: 'Print Label Size',
                  value: _labelSize,
                  items: const ['50x25mm', '40x20mm', '70x35mm'],
                  itemLabel: (v) => v,
                  onChanged: (v) => setState(() => _labelSize = v!),
                ),
              ],
            ),
            const SizedBox(height: 24),
            AppButton(label: 'Save Changes', onPressed: _save),
          ],
        ),
      ),
    );
  }
}