import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:manager_app/Models/managerContext.dart';
import 'package:manager_app/app_context.dart';
import 'package:manager_app/constants.dart';
import 'package:manager_api_new/api.dart';
import 'package:provider/provider.dart';

class ApiKeysScreen extends StatefulWidget {
  const ApiKeysScreen({Key? key}) : super(key: key);

  @override
  _ApiKeysScreenState createState() => _ApiKeysScreenState();
}

class _ApiKeysScreenState extends State<ApiKeysScreen> {
  List<Map<String, dynamic>> _keys = [];
  bool _loading = true;

  static String _appTypeName(int? v) {
    switch (v) {
      case 0: return 'VisitApp';
      case 1: return 'TabletApp';
      default: return 'Other';
    }
  }

  Future<void> _loadKeys(ManagerAppContext ctx) async {
    try {
      final response = await ctx.clientAPI!.apiKeyApi!.apiKeyGetApiKeysWithHttpInfo();
      if (response.statusCode == 200) {
        final List<dynamic> json = jsonDecode(utf8.decode(response.bodyBytes));
        setState(() {
          _keys = json.cast<Map<String, dynamic>>();
          _loading = false;
        });
      }
    } catch (e) {
      setState(() => _loading = false);
    }
  }

  Future<String?> _createKey(ManagerAppContext ctx, String name, ApiKeyAppType appType) async {
    final response = await ctx.clientAPI!.apiKeyApi!.apiKeyCreateApiKeyWithHttpInfo(
      CreateApiKeyRequest(name: name, appType: appType),
    );
    if (response.statusCode == 200 || response.statusCode == 201) {
      final Map<String, dynamic> json = jsonDecode(utf8.decode(response.bodyBytes));
      await _loadKeys(ctx);
      return json['key'] as String?;
    }
    return null;
  }

  Future<void> _revokeKey(ManagerAppContext ctx, String id) async {
    await ctx.clientAPI!.apiKeyApi!.apiKeyRevokeApiKey(id);
    await _loadKeys(ctx);
  }

  void _showCreateDialog(BuildContext context, ManagerAppContext ctx) {
    final nameCtrl = TextEditingController();
    ApiKeyAppType selectedType = ApiKeyAppType.number0;

    showDialog(
      context: context,
      builder: (_) => StatefulBuilder(builder: (ctx2, setLocal) {
        return AlertDialog(
          title: const Text('Créer une clé API'),
          content: Column(mainAxisSize: MainAxisSize.min, children: [
            TextField(controller: nameCtrl, decoration: const InputDecoration(labelText: 'Nom')),
            const SizedBox(height: 8),
            Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                const Text('Type d\'application', style: TextStyle(fontSize: 12, color: Colors.grey)),
                DropdownButton<ApiKeyAppType>(
                  value: selectedType,
                  isExpanded: true,
                  items: ApiKeyAppType.values
                      .map((t) => DropdownMenuItem(value: t, child: Text(_appTypeName(t.value))))
                      .toList(),
                  onChanged: (v) => setLocal(() => selectedType = v!),
                ),
              ],
            ),
          ]),
          actions: [
            TextButton(onPressed: () => Navigator.pop(ctx2), child: const Text('Annuler')),
            ElevatedButton(
              onPressed: () async {
                Navigator.pop(ctx2);
                final plainKey = await _createKey(ctx, nameCtrl.text, selectedType);
                if (plainKey != null && context.mounted) {
                  _showPlainKeyDialog(context, plainKey);
                }
              },
              child: const Text('Créer'),
            ),
          ],
        );
      }),
    );
  }

  void _showPlainKeyDialog(BuildContext context, String plainKey) {
    showDialog(
      context: context,
      barrierDismissible: false,
      builder: (_) => AlertDialog(
        title: const Text('Clé API créée'),
        content: Column(mainAxisSize: MainAxisSize.min, crossAxisAlignment: CrossAxisAlignment.start, children: [
          const Text(
            'Copiez cette clé maintenant — elle ne sera plus affichée.',
            style: TextStyle(color: Colors.orange, fontWeight: FontWeight.w600),
          ),
          const SizedBox(height: 12),
          Container(
            padding: const EdgeInsets.all(12),
            decoration: BoxDecoration(
              color: Colors.grey.shade100,
              borderRadius: BorderRadius.circular(4),
              border: Border.all(color: Colors.grey.shade300),
            ),
            child: Row(children: [
              Expanded(child: SelectableText(plainKey, style: const TextStyle(fontFamily: 'monospace', fontSize: 13))),
              IconButton(
                icon: const Icon(Icons.copy, size: 18),
                tooltip: 'Copier',
                onPressed: () => Clipboard.setData(ClipboardData(text: plainKey)),
              ),
            ]),
          ),
        ]),
        actions: [
          ElevatedButton(
            onPressed: () => Navigator.pop(context),
            child: const Text('J\'ai copié la clé'),
          ),
        ],
      ),
    );
  }

  void _confirmRevoke(BuildContext context, ManagerAppContext ctx, Map<String, dynamic> key) {
    showDialog(
      context: context,
      builder: (_) => AlertDialog(
        title: const Text('Révoquer la clé API'),
        content: Text('Révoquer « ${key['name']} » ? Les apps utilisant cette clé perdront l\'accès.'),
        actions: [
          TextButton(onPressed: () => Navigator.pop(context), child: const Text('Annuler')),
          ElevatedButton(
            style: ElevatedButton.styleFrom(backgroundColor: Colors.red),
            onPressed: () async {
              Navigator.pop(context);
              await _revokeKey(ctx, key['id'] as String);
            },
            child: const Text('Révoquer', style: TextStyle(color: Colors.white)),
          ),
        ],
      ),
    );
  }

  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addPostFrameCallback((_) {
      final ctx = Provider.of<AppContext>(context, listen: false).getContext() as ManagerAppContext;
      _loadKeys(ctx);
    });
  }

  @override
  Widget build(BuildContext context) {
    final appContext = Provider.of<AppContext>(context);
    final managerCtx = appContext.getContext() as ManagerAppContext;

    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Row(
          mainAxisAlignment: MainAxisAlignment.spaceBetween,
          children: [
            Text('Clés API', style: TextStyle(fontSize: 24, fontWeight: FontWeight.w600, color: kPrimaryColor)),
            ElevatedButton.icon(
              onPressed: () => _showCreateDialog(context, managerCtx),
              icon: const Icon(Icons.add),
              label: const Text('Créer une clé'),
            ),
          ],
        ),
        const SizedBox(height: 16),
        if (_loading)
          const Center(child: CircularProgressIndicator())
        else if (_keys.isEmpty)
          const Center(child: Text('Aucune clé API'))
        else
          Expanded(
            child: SingleChildScrollView(
              child: DataTable(
                columns: const [
                  DataColumn(label: Text('Nom')),
                  DataColumn(label: Text('Type')),
                  DataColumn(label: Text('Créée le')),
                  DataColumn(label: Text('Statut')),
                  DataColumn(label: Text('Actions')),
                ],
                rows: _keys.map((key) {
                  final isActive = key['isActive'] as bool? ?? false;
                  final dateRaw = key['dateCreation'] as String?;
                  final date = dateRaw != null
                      ? DateTime.tryParse(dateRaw)?.toLocal()
                      : null;
                  final dateStr = date != null
                      ? '${date.day.toString().padLeft(2, '0')}/${date.month.toString().padLeft(2, '0')}/${date.year}'
                      : '—';

                  return DataRow(cells: [
                    DataCell(Text(key['name'] as String? ?? '')),
                    DataCell(Text(_appTypeName(key['appType'] as int?))),
                    DataCell(Text(dateStr)),
                    DataCell(Chip(
                      label: Text(isActive ? 'Active' : 'Révoquée',
                          style: TextStyle(color: isActive ? Colors.green.shade700 : Colors.red.shade700, fontSize: 12)),
                      backgroundColor: isActive ? Colors.green.shade50 : Colors.red.shade50,
                      side: BorderSide(color: isActive ? Colors.green.shade200 : Colors.red.shade200),
                    )),
                    DataCell(isActive
                        ? IconButton(
                            icon: const Icon(Icons.block, color: Colors.red),
                            tooltip: 'Révoquer',
                            onPressed: () => _confirmRevoke(context, managerCtx, key),
                          )
                        : const SizedBox()),
                  ]);
                }).toList(),
              ),
            ),
          ),
      ],
    );
  }
}