import '../models/models.dart';

class AuthState {
  const AuthState({
    this.loggedIn = false,
    this.pendingAction,
    this.phone,
    this.loginMethod,
  });

  final bool loggedIn;
  final PendingLoginAction? pendingAction;
  final String? phone;
  final LoginMethod? loginMethod;

  AuthState copyWith({
    bool? loggedIn,
    Object? pendingAction = _sentinel,
    Object? phone = _sentinel,
    Object? loginMethod = _sentinel,
  }) {
    return AuthState(
      loggedIn: loggedIn ?? this.loggedIn,
      pendingAction: identical(pendingAction, _sentinel)
          ? this.pendingAction
          : pendingAction as PendingLoginAction?,
      phone: identical(phone, _sentinel) ? this.phone : phone as String?,
      loginMethod: identical(loginMethod, _sentinel)
          ? this.loginMethod
          : loginMethod as LoginMethod?,
    );
  }
}

class PendingLoginAction {
  const PendingLoginAction({
    required this.action,
    required this.reportId,
    required this.contextText,
  });

  final LoginRequiredAction action;
  final String reportId;
  final String contextText;
}

enum LoginRequiredAction { favorite, saveListen }

enum LoginMethod { phone, wechat, apple }

class ProfileState {
  const ProfileState({
    this.favorites = const {},
    this.savedListens = const {},
    this.history = const [],
  });

  final Set<String> favorites;
  final Set<String> savedListens;
  final List<String> history;

  ProfileState copyWith({
    Set<String>? favorites,
    Set<String>? savedListens,
    List<String>? history,
  }) {
    return ProfileState(
      favorites: favorites ?? this.favorites,
      savedListens: savedListens ?? this.savedListens,
      history: history ?? this.history,
    );
  }
}

class DetailNavigationState {
  const DetailNavigationState({
    this.originTab = AppTab.recommend,
    this.stack = const [],
    this.tabScroll = const {},
  });

  final AppTab originTab;
  final List<DetailStackEntry> stack;
  final Map<AppTab, double> tabScroll;

  DetailNavigationState copyWith({
    AppTab? originTab,
    List<DetailStackEntry>? stack,
    Map<AppTab, double>? tabScroll,
  }) {
    return DetailNavigationState(
      originTab: originTab ?? this.originTab,
      stack: stack ?? this.stack,
      tabScroll: tabScroll ?? this.tabScroll,
    );
  }
}

class DetailStackEntry {
  const DetailStackEntry({
    required this.type,
    required this.id,
    this.scrollTop = 0,
  });

  final DetailEntryType type;
  final String id;
  final double scrollTop;

  DetailStackEntry copyWith({double? scrollTop}) {
    return DetailStackEntry(
      type: type,
      id: id,
      scrollTop: scrollTop ?? this.scrollTop,
    );
  }
}

enum DetailEntryType { report, institution }

enum AppTab { recommend, reports, institutions, listen, profile }

class SheetState {
  const SheetState.hidden() : intent = null;
  const SheetState.visible(this.intent);

  final SheetIntent? intent;

  bool get isVisible => intent != null;
}

sealed class SheetIntent {
  const SheetIntent();
}

class LoginSheetIntent extends SheetIntent {
  const LoginSheetIntent({required this.contextText});

  final String contextText;
}

class FilterSheetIntent extends SheetIntent {
  const FilterSheetIntent();
}

class OutboundSheetIntent extends SheetIntent {
  const OutboundSheetIntent({required this.scene, this.refId, this.targetUrl});

  final String scene;
  final String? refId;
  final String? targetUrl;
}

class ProfileListSheetIntent extends SheetIntent {
  const ProfileListSheetIntent({
    required this.kind,
    required this.title,
    this.reports = const [],
  });

  final ProfileListKind kind;
  final String title;
  final List<ReportCardModel> reports;
}

enum ProfileListKind { favorites, history, saved }

class OutboundEvent {
  const OutboundEvent({required this.scene, this.refId, this.targetUrl});

  final String scene;
  final String? refId;
  final String? targetUrl;
}

const Object _sentinel = Object();