// account_api.dart — 账户域端点封装(受 JWT 保护,走 ApiClient)。
//
// 覆盖:/v1/me、/v1/plans、/v1/me/devices(列表+删除)、/v1/usage、
// /v1/redeem、/v1/ads/unlock。错误统一 AuthApiException(由 ApiClient 抛)。
import '../models/device.dart';
import '../models/device_usage.dart';
import '../models/me.dart';
import '../models/plan.dart';
import '../models/usage_point.dart';
import 'api_client.dart';

/// 兑换结果(POST /v1/redeem)。
class RedeemResult {
  const RedeemResult({
    required this.plan,
    required this.durationDays,
    this.idempotent = false,
    this.expiresAt,
  });

  final String plan;
  final int durationDays;
  final bool idempotent;
  final DateTime? expiresAt;

  factory RedeemResult.fromJson(Map<String, dynamic> m) {
    final exp = m['expires_at'] as String?;
    return RedeemResult(
      plan: m['plan'] as String? ?? '',
      durationDays: (m['duration_days'] as num?)?.toInt() ?? 0,
      idempotent: m['idempotent'] as bool? ?? false,
      expiresAt: (exp != null && exp.isNotEmpty) ? DateTime.tryParse(exp) : null,
    );
  }
}

class AccountApi {
  AccountApi(this._c);

  final ApiClient _c;

  /// GET /v1/me — 账户聚合视图。
  Future<Me> me() async => Me.fromJson(await _c.getJson('/v1/me'));

  /// GET /v1/plans — 套餐定义。
  Future<List<Plan>> plans() async {
    final body = await _c.getJson('/v1/plans');
    final raw = (body['plans'] as List<dynamic>?) ?? const [];
    return raw.map((e) => Plan.fromJson(e as Map<String, dynamic>)).toList();
  }

  /// GET /v1/me/devices — 已登录设备列表。
  Future<List<Device>> devices() async {
    final body = await _c.getJson('/v1/me/devices');
    final raw = (body['devices'] as List<dynamic>?) ?? const [];
    return raw.map((e) => Device.fromJson(e as Map<String, dynamic>)).toList();
  }

  /// DELETE /v1/me/devices/{uuid} — 清除登录信息(移除设备 + 吊销会话/凭证)。
  Future<void> removeDevice(String uuid) => _c.delete('/v1/me/devices/$uuid');

  /// POST /v1/me/devices/{uuid}/logout — 强制退出(吊销该设备会话,设备留列表)。
  Future<void> forceLogout(String uuid) async {
    await _c.postJson('/v1/me/devices/$uuid/logout');
  }

  /// POST /v1/me/devices/{uuid}/rename — 重命名设备。
  Future<void> renameDevice(String uuid, String name) async {
    await _c.postJson('/v1/me/devices/$uuid/rename', {'name': name});
  }

  /// GET /v1/me/session?device_id= — 本设备会话是否仍有效。
  /// false = 已被其他设备强制退出 → 客户端应登出。供 ~15s 轮询实现近实时远程下线。
  Future<bool> sessionActive(String deviceId) async {
    final body = await _c.getJson(
        '/v1/me/session?device_id=${Uri.encodeQueryComponent(deviceId)}');
    return body['active'] == true;
  }

  /// GET /v1/usage?days=N&tz_offset=M — 最近 N 天用量(默认 7,后端范围 [1,90])。
  /// 带本机时区偏移(分钟,如 UTC+8=480),服务端按「本地日」聚合 → 「今天」与本地日历一致
  /// (修「29 号却显示 28 号数据」的时区 bug)。
  Future<List<UsagePoint>> usage({int days = 7, String? device}) async {
    final tz = DateTime.now().timeZoneOffset.inMinutes;
    final dev = (device != null && device.isNotEmpty) ? '&device=$device' : '';
    final body = await _c.getJson('/v1/usage?days=$days&tz_offset=$tz$dev');
    final raw = (body['points'] as List<dynamic>?) ?? const [];
    return raw.map((e) => UsagePoint.fromJson(e as Map<String, dynamic>)).toList();
  }

  /// GET /v1/usage/devices?days=N — 最近 N 天按设备用量(默认 7,范围 [1,90])。
  Future<List<DeviceUsage>> deviceUsage({int days = 7}) async {
    final body = await _c.getJson('/v1/usage/devices?days=$days');
    final raw = (body['devices'] as List<dynamic>?) ?? const [];
    return raw.map((e) => DeviceUsage.fromJson(e as Map<String, dynamic>)).toList();
  }

  /// POST /v1/redeem — 兑换码。
  Future<RedeemResult> redeem(String code) async =>
      RedeemResult.fromJson(await _c.postJson('/v1/redeem', {'code': code}));

  /// POST /v1/ads/unlock — 看广告加时(累加式)。返回本次加时分钟与最新剩余分钟。
  Future<AdUnlockResult> adUnlock({required String deviceId, required String adToken}) async {
    final body = await _c.postJson('/v1/ads/unlock', {'device_id': deviceId, 'ad_token': adToken});
    return AdUnlockResult(
      grantedMinutes: (body['granted_minutes'] as num?)?.toInt() ?? 0,
      minutesRemaining: (body['minutes_remaining'] as num?)?.toInt() ?? 0,
    );
  }
}

/// 看广告加时结果(POST /v1/ads/unlock 响应)。
class AdUnlockResult {
  const AdUnlockResult({required this.grantedMinutes, required this.minutesRemaining});

  /// 本次广告实际加时分钟(已达每日封顶时为 0)。
  final int grantedMinutes;

  /// 加时后账户当日剩余分钟(全账户共享)。
  final int minutesRemaining;
}