import 'package:flutter_test/flutter_test.dart';
import 'package:tatlock_ui/core/auth/permissions.dart';

void main() {
  group('Domain', () {
    group('fromString', () {
      test('parses valid domain strings', () {
        expect(Domain.fromString('control-room'), equals(Domain.controlRoom));
        expect(Domain.fromString('library'), equals(Domain.library));
        expect(Domain.fromString('media'), equals(Domain.media));
        expect(Domain.fromString('ai'), equals(Domain.ai));
        expect(Domain.fromString('housekeeper'), equals(Domain.housekeeper));
        expect(Domain.fromString('developer'), equals(Domain.developer));
        expect(Domain.fromString('documents'), equals(Domain.documents));
        expect(Domain.fromString('gaming'), equals(Domain.gaming));
        expect(Domain.fromString('admin'), equals(Domain.admin));
      });

      test('returns null for invalid domain', () {
        expect(Domain.fromString('invalid'), isNull);
        expect(Domain.fromString(''), isNull);
        expect(Domain.fromString('CONTROL-ROOM'), isNull);
      });
    });

    test('value returns correct string', () {
      expect(Domain.controlRoom.value, equals('control-room'));
      expect(Domain.library.value, equals('library'));
      expect(Domain.admin.value, equals('admin'));
    });
  });

  group('Action', () {
    group('fromString', () {
      test('parses valid action strings', () {
        expect(Action.fromString('viewer'), equals(Action.viewer));
        expect(Action.fromString('user'), equals(Action.user));
        expect(Action.fromString('editor'), equals(Action.editor));
        expect(Action.fromString('admin'), equals(Action.admin));
      });

      test('returns null for invalid action', () {
        expect(Action.fromString('invalid'), isNull);
        expect(Action.fromString(''), isNull);
        expect(Action.fromString('ADMIN'), isNull);
      });
    });

    group('level', () {
      test('has correct hierarchy levels', () {
        expect(Action.viewer.level, equals(1));
        expect(Action.user.level, equals(2));
        expect(Action.editor.level, equals(3));
        expect(Action.admin.level, equals(4));
      });

      test('levels are ordered correctly', () {
        expect(Action.viewer.level, lessThan(Action.user.level));
        expect(Action.user.level, lessThan(Action.editor.level));
        expect(Action.editor.level, lessThan(Action.admin.level));
      });
    });

    group('grants', () {
      test('admin grants all actions', () {
        expect(Action.admin.grants(Action.admin), isTrue);
        expect(Action.admin.grants(Action.editor), isTrue);
        expect(Action.admin.grants(Action.user), isTrue);
        expect(Action.admin.grants(Action.viewer), isTrue);
      });

      test('editor grants editor and below', () {
        expect(Action.editor.grants(Action.admin), isFalse);
        expect(Action.editor.grants(Action.editor), isTrue);
        expect(Action.editor.grants(Action.user), isTrue);
        expect(Action.editor.grants(Action.viewer), isTrue);
      });

      test('user grants user and below', () {
        expect(Action.user.grants(Action.admin), isFalse);
        expect(Action.user.grants(Action.editor), isFalse);
        expect(Action.user.grants(Action.user), isTrue);
        expect(Action.user.grants(Action.viewer), isTrue);
      });

      test('viewer only grants viewer', () {
        expect(Action.viewer.grants(Action.admin), isFalse);
        expect(Action.viewer.grants(Action.editor), isFalse);
        expect(Action.viewer.grants(Action.user), isFalse);
        expect(Action.viewer.grants(Action.viewer), isTrue);
      });
    });
  });

  group('Role', () {
    group('grants', () {
      test('grants permission for matching domain and category', () {
        const role = Role(
          id: '1',
          name: 'control-room.general:admin',
          domain: Domain.controlRoom,
          category: 'general',
          action: Action.admin,
        );

        expect(role.grants(Domain.controlRoom, Action.admin), isTrue);
        expect(role.grants(Domain.controlRoom, Action.editor), isTrue);
        expect(role.grants(Domain.controlRoom, Action.user), isTrue);
        expect(role.grants(Domain.controlRoom, Action.viewer), isTrue);
      });

      test('denies permission for different domain', () {
        const role = Role(
          id: '1',
          name: 'control-room.general:admin',
          domain: Domain.controlRoom,
          category: 'general',
          action: Action.admin,
        );

        expect(role.grants(Domain.media, Action.viewer), isFalse);
        expect(role.grants(Domain.library, Action.viewer), isFalse);
      });

      test('denies permission for different category', () {
        const role = Role(
          id: '1',
          name: 'control-room.servers:admin',
          domain: Domain.controlRoom,
          category: 'servers',
          action: Action.admin,
        );

        expect(
          role.grants(Domain.controlRoom, Action.admin, category: 'general'),
          isFalse,
        );
        expect(
          role.grants(Domain.controlRoom, Action.admin, category: 'servers'),
          isTrue,
        );
      });

      test('global admin grants all permissions', () {
        const globalAdmin = Role(
          id: '1',
          name: 'admin.general:admin',
          domain: Domain.admin,
          category: 'general',
          action: Action.admin,
        );

        // Should grant any domain, category, action
        expect(globalAdmin.grants(Domain.controlRoom, Action.admin), isTrue);
        expect(globalAdmin.grants(Domain.media, Action.editor), isTrue);
        expect(globalAdmin.grants(Domain.library, Action.viewer), isTrue);
        expect(
          globalAdmin.grants(Domain.documents, Action.user, category: 'specific'),
          isTrue,
        );
      });

      test('non-global admin role does not grant everything', () {
        const domainAdmin = Role(
          id: '1',
          name: 'admin.specific:admin',
          domain: Domain.admin,
          category: 'specific', // Not 'general'
          action: Action.admin,
        );

        // Should not grant arbitrary permissions
        expect(domainAdmin.grants(Domain.controlRoom, Action.viewer), isFalse);
      });
    });
  });

  group('RoleListPermissions extension', () {
    final roles = [
      const Role(
        id: '1',
        name: 'control-room.general:admin',
        domain: Domain.controlRoom,
        category: 'general',
        action: Action.admin,
      ),
      const Role(
        id: '2',
        name: 'media.general:viewer',
        domain: Domain.media,
        category: 'general',
        action: Action.viewer,
      ),
    ];

    group('hasPermission', () {
      test('returns true when any role grants permission', () {
        expect(
          roles.hasPermission(Domain.controlRoom, Action.admin),
          isTrue,
        );
        expect(
          roles.hasPermission(Domain.controlRoom, Action.viewer),
          isTrue,
        );
        expect(
          roles.hasPermission(Domain.media, Action.viewer),
          isTrue,
        );
      });

      test('returns false when no role grants permission', () {
        expect(
          roles.hasPermission(Domain.media, Action.editor),
          isFalse,
        );
        expect(
          roles.hasPermission(Domain.library, Action.viewer),
          isFalse,
        );
      });

      test('returns false for empty role list', () {
        expect(
          <Role>[].hasPermission(Domain.controlRoom, Action.viewer),
          isFalse,
        );
      });
    });

    group('isGlobalAdmin', () {
      test('returns true when global admin role present', () {
        final adminRoles = [
          const Role(
            id: '1',
            name: 'admin.general:admin',
            domain: Domain.admin,
            category: 'general',
            action: Action.admin,
          ),
        ];

        expect(adminRoles.isGlobalAdmin, isTrue);
      });

      test('returns false when no global admin role', () {
        expect(roles.isGlobalAdmin, isFalse);
      });

      test('returns false for empty role list', () {
        expect(<Role>[].isGlobalAdmin, isFalse);
      });

      test('returns false for admin domain with non-general category', () {
        final limitedAdmin = [
          const Role(
            id: '1',
            name: 'admin.specific:admin',
            domain: Domain.admin,
            category: 'specific',
            action: Action.admin,
          ),
        ];

        expect(limitedAdmin.isGlobalAdmin, isFalse);
      });

      test('returns false for admin domain with non-admin action', () {
        final viewerAdmin = [
          const Role(
            id: '1',
            name: 'admin.general:viewer',
            domain: Domain.admin,
            category: 'general',
            action: Action.viewer,
          ),
        ];

        expect(viewerAdmin.isGlobalAdmin, isFalse);
      });
    });
  });
}