import { describe, it, expect, vi, beforeEach } from 'vitest';

vi.mock('../../prisma.js', () => ({
	prisma: {
		user: { findUnique: vi.fn() },
		permission: {
			findFirst: vi.fn(),
			findMany: vi.fn(),
			upsert: vi.fn(),
			deleteMany: vi.fn()
		},
		userGroup: { findMany: vi.fn() }
	}
}));

import { prisma } from '../../prisma.js';
import * as permissionService from '../permissionService.js';

const mockUser = prisma.user as unknown as Record<string, ReturnType<typeof vi.fn>>;
const mockPermission = prisma.permission as unknown as Record<string, ReturnType<typeof vi.fn>>;
const mockUserGroup = prisma.userGroup as unknown as Record<string, ReturnType<typeof vi.fn>>;

describe('permissionService', () => {
	beforeEach(() => {
		vi.clearAllMocks();
	});

	describe('checkPermission', () => {
		it('grants full access to admins', async () => {
			mockUser.findUnique.mockResolvedValue({ role: 'admin' });

			const result = await permissionService.checkPermission(
				'board',
				'b1',
				'admin-user',
				'edit'
			);

			expect(result.hasPermission).toBe(true);
			expect(result.effectiveLevel).toBe('admin');
			expect(result.source).toBe('admin');
		});

		it('checks direct user permission', async () => {
			mockUser.findUnique.mockResolvedValue({ role: 'user' });
			mockPermission.findFirst.mockResolvedValue({ level: 'edit' });

			const result = await permissionService.checkPermission(
				'board',
				'b1',
				'user1',
				'view'
			);

			expect(result.hasPermission).toBe(true);
			expect(result.effectiveLevel).toBe('edit');
			expect(result.source).toBe('user');
		});

		it('denies when user permission is insufficient', async () => {
			mockUser.findUnique.mockResolvedValue({ role: 'user' });
			mockPermission.findFirst.mockResolvedValue({ level: 'view' });

			const result = await permissionService.checkPermission(
				'board',
				'b1',
				'user1',
				'admin'
			);

			expect(result.hasPermission).toBe(false);
		});

		it('falls back to group permissions', async () => {
			mockUser.findUnique.mockResolvedValue({ role: 'user' });
			mockPermission.findFirst.mockResolvedValue(null);
			mockUserGroup.findMany.mockResolvedValue([{ groupId: 'g1' }]);
			mockPermission.findMany.mockResolvedValue([{ level: 'edit' }]);

			const result = await permissionService.checkPermission(
				'board',
				'b1',
				'user1',
				'view'
			);

			expect(result.hasPermission).toBe(true);
			expect(result.source).toBe('group');
		});

		it('denies when no permission found', async () => {
			mockUser.findUnique.mockResolvedValue({ role: 'user' });
			mockPermission.findFirst.mockResolvedValue(null);
			mockUserGroup.findMany.mockResolvedValue([]);

			const result = await permissionService.checkPermission(
				'board',
				'b1',
				'user1',
				'view'
			);

			expect(result.hasPermission).toBe(false);
			expect(result.effectiveLevel).toBeNull();
			expect(result.source).toBeNull();
		});
	});

	describe('grantPermission', () => {
		it('upserts a permission', async () => {
			const perm = {
				entityType: 'board' as const,
				entityId: 'b1',
				targetType: 'user' as const,
				targetId: 'u1',
				level: 'edit' as const
			};
			mockPermission.upsert.mockResolvedValue({ id: 'p1', ...perm });

			const result = await permissionService.grantPermission(perm);
			expect(result.level).toBe('edit');
		});
	});

	describe('revokePermission', () => {
		it('deletes matching permissions', async () => {
			mockPermission.deleteMany.mockResolvedValue({ count: 1 });

			await permissionService.revokePermission('board', 'b1', 'user', 'u1');

			expect(mockPermission.deleteMany).toHaveBeenCalledWith({
				where: {
					entityType: 'board',
					entityId: 'b1',
					targetType: 'user',
					targetId: 'u1'
				}
			});
		});
	});

	describe('getPermissionsForEntity', () => {
		it('returns permissions for an entity', async () => {
			const perms = [{ id: 'p1', level: 'view' }];
			mockPermission.findMany.mockResolvedValue(perms);

			const result = await permissionService.getPermissionsForEntity('board', 'b1');
			expect(result).toEqual(perms);
		});
	});
});