import 'dart:convert';
import 'package:shared_preferences/shared_preferences.dart';
import '../about/internal/application/ServerProfile.dart';
import 'SecretStore.dart';

/// Persists server profiles (with their nested services) locally. Non-secret
/// data goes to shared_preferences; passwords go to encrypted [SecretStore].
class ConfigStore {
  static const _key = 'peach.servers.v2';

  /// The key used before the app was renamed. Read once and migrated forward,
  /// so an existing install keeps its servers.
  static const _legacyKey = 'jarpilot.servers.v2';

  final _secrets = SecretStore();

  Future<List<ServerProfile>> load() async {
    final prefs = await SharedPreferences.getInstance();
    var raw = prefs.getString(_key);
    if (raw == null || raw.isEmpty) {
      raw = prefs.getString(_legacyKey);
      if (raw != null && raw.isNotEmpty) {
        await prefs.setString(_key, raw);
        await prefs.remove(_legacyKey);
      }
    }
    if (raw == null || raw.isEmpty) return [];
    final list = jsonDecode(raw) as List<dynamic>;
    final servers = list
        .map((e) => ServerProfile.fromJson(e as Map<String, dynamic>))
        .toList();
    // Hydrate passwords from encrypted storage.
    for (final s in servers) {
      s.password = await _secrets.readPassword(s.id) ?? '';
    }
    return servers;
  }

  Future<void> save(List<ServerProfile> servers) async {
    final prefs = await SharedPreferences.getInstance();
    await prefs.setString(
      _key,
      jsonEncode(servers.map((s) => s.toJson()).toList()),
    );
    for (final s in servers) {
      await _secrets.writePassword(s.id, s.password);
    }
  }

  Future<void> deleteSecret(String serverId) =>
      _secrets.deletePassword(serverId);
}