import '../utils/app_time.dart';

class Announcement {
  Announcement({
    required this.id,
    required this.authorId,
    required this.title,
    required this.body,
    required this.visibleRoles,
    required this.isTemplate,
    this.templateId,
    required this.createdAt,
    required this.updatedAt,
    required this.bannerEnabled,
    this.bannerShowAt,
    this.bannerHideAt,
    this.pushIntervalMinutes,
  });

  final String id;
  final String authorId;
  final String title;
  final String body;
  final List<String> visibleRoles;
  final bool isTemplate;
  final String? templateId;
  final DateTime createdAt;
  final DateTime updatedAt;

  /// Whether a persistent banner is shown at the top of the announcements screen.
  final bool bannerEnabled;

  /// When the banner should start showing. [null] means immediately.
  final DateTime? bannerShowAt;

  /// When the banner should stop showing. [null] means it requires a manual
  /// turn-off by the poster or an admin.
  final DateTime? bannerHideAt;

  /// How often (in minutes) a scheduled push notification is sent while the
  /// banner is active. [null] means no scheduled push. Max is 1440 (daily).
  final int? pushIntervalMinutes;

  /// Whether the banner is currently active (visible) based on the current time.
  bool get isBannerActive {
    if (!bannerEnabled) return false;
    final now = AppTime.now();
    if (bannerShowAt != null && now.isBefore(bannerShowAt!)) return false;
    if (bannerHideAt != null && now.isAfter(bannerHideAt!)) return false;
    return true;
  }

  @override
  bool operator ==(Object other) =>
      identical(this, other) ||
      other is Announcement &&
          runtimeType == other.runtimeType &&
          id == other.id &&
          authorId == other.authorId &&
          title == other.title &&
          body == other.body &&
          isTemplate == other.isTemplate &&
          templateId == other.templateId &&
          bannerEnabled == other.bannerEnabled &&
          bannerShowAt == other.bannerShowAt &&
          bannerHideAt == other.bannerHideAt &&
          pushIntervalMinutes == other.pushIntervalMinutes &&
          createdAt == other.createdAt &&
          updatedAt == other.updatedAt;

  @override
  int get hashCode => Object.hash(
        id,
        authorId,
        title,
        body,
        isTemplate,
        templateId,
        bannerEnabled,
        bannerShowAt,
        bannerHideAt,
        pushIntervalMinutes,
        createdAt,
        updatedAt,
      );

  factory Announcement.fromMap(Map<String, dynamic> map) {
    final rolesRaw = map['visible_roles'];
    final roles = rolesRaw is List ? rolesRaw.cast<String>() : <String>[];

    return Announcement(
      id: map['id'] as String,
      authorId: map['author_id'] as String,
      title: map['title'] as String? ?? '',
      body: map['body'] as String? ?? '',
      visibleRoles: roles,
      isTemplate: map['is_template'] as bool? ?? false,
      templateId: map['template_id'] as String?,
      createdAt: AppTime.parse(map['created_at'] as String),
      updatedAt: AppTime.parse(map['updated_at'] as String),
      bannerEnabled: map['banner_enabled'] as bool? ?? false,
      bannerShowAt: map['banner_show_at'] != null
          ? AppTime.parse(map['banner_show_at'] as String)
          : null,
      bannerHideAt: map['banner_hide_at'] != null
          ? AppTime.parse(map['banner_hide_at'] as String)
          : null,
      pushIntervalMinutes: map['push_interval_minutes'] as int?,
    );
  }
}