import { PermissionResolverService } from './permission-resolver.service';
import { PrismaService } from '../../prisma/prisma.service';

describe('PermissionResolverService', () => {
  let resolver: PermissionResolverService;
  let prisma: { user: { findUnique: jest.Mock } };

  function activeUserWithPermissions(...keys: string[]) {
    return {
      isActive: true,
      passwordChangedAt: null as Date | null,
      role: {
        status: 'ACTIVE',
        permissions: keys.map((key) => ({ permission: { key } })),
      },
    };
  }

  beforeEach(() => {
    prisma = { user: { findUnique: jest.fn() } };
    resolver = new PermissionResolverService(
      prisma as unknown as PrismaService,
    );
  });

  it('returns the granted permission keys for an active user with an active role', async () => {
    prisma.user.findUnique.mockResolvedValue(
      activeUserWithPermissions('colonies:read', 'tasks:create'),
    );

    const permissions = await resolver.getPermissions('user-1');

    expect(Array.from(permissions).sort()).toEqual(
      ['colonies:read', 'tasks:create'].sort(),
    );
  });

  it('returns no permissions for a deactivated user, even if their role is active', async () => {
    prisma.user.findUnique.mockResolvedValue({
      isActive: false,
      role: {
        status: 'ACTIVE',
        permissions: [{ permission: { key: 'colonies:read' } }],
      },
    });

    const permissions = await resolver.getPermissions('user-1');

    expect(permissions.size).toBe(0);
  });

  it('returns no permissions when the role itself is deactivated', async () => {
    prisma.user.findUnique.mockResolvedValue({
      isActive: true,
      role: {
        status: 'INACTIVE',
        permissions: [{ permission: { key: 'colonies:read' } }],
      },
    });

    const permissions = await resolver.getPermissions('user-1');

    expect(permissions.size).toBe(0);
  });

  it('returns no permissions when the user does not exist', async () => {
    prisma.user.findUnique.mockResolvedValue(null);

    const permissions = await resolver.getPermissions('missing');

    expect(permissions.size).toBe(0);
  });

  it('caches the result and does not re-query within the TTL', async () => {
    prisma.user.findUnique.mockResolvedValue(
      activeUserWithPermissions('colonies:read'),
    );

    await resolver.getPermissions('user-1');
    await resolver.getPermissions('user-1');

    expect(prisma.user.findUnique).toHaveBeenCalledTimes(1);
  });

  it('re-queries after invalidateUser', async () => {
    prisma.user.findUnique.mockResolvedValue(
      activeUserWithPermissions('colonies:read'),
    );

    await resolver.getPermissions('user-1');
    resolver.invalidateUser('user-1');
    await resolver.getPermissions('user-1');

    expect(prisma.user.findUnique).toHaveBeenCalledTimes(2);
  });

  describe('isTokenValid', () => {
    const nowSeconds = Math.floor(Date.now() / 1000);

    it('returns true for an active user with no recorded password change', async () => {
      prisma.user.findUnique.mockResolvedValue(
        activeUserWithPermissions('colonies:read'),
      );

      await expect(resolver.isTokenValid('user-1', nowSeconds)).resolves.toBe(
        true,
      );
    });

    it('returns false for a deactivated user', async () => {
      prisma.user.findUnique.mockResolvedValue({
        isActive: false,
        passwordChangedAt: null,
        role: {
          status: 'ACTIVE',
          permissions: [{ permission: { key: 'colonies:read' } }],
        },
      });

      await expect(resolver.isTokenValid('user-1', nowSeconds)).resolves.toBe(
        false,
      );
    });

    it('returns false when the role is inactive', async () => {
      prisma.user.findUnique.mockResolvedValue({
        isActive: true,
        passwordChangedAt: null,
        role: {
          status: 'INACTIVE',
          permissions: [{ permission: { key: 'colonies:read' } }],
        },
      });

      await expect(resolver.isTokenValid('user-1', nowSeconds)).resolves.toBe(
        false,
      );
    });

    it('returns false when the user does not exist', async () => {
      prisma.user.findUnique.mockResolvedValue(null);

      await expect(resolver.isTokenValid('missing', nowSeconds)).resolves.toBe(
        false,
      );
    });

    it('returns false when the token was issued before the last password change', async () => {
      const entry = activeUserWithPermissions('colonies:read');
      entry.passwordChangedAt = new Date((nowSeconds + 60) * 1000);
      prisma.user.findUnique.mockResolvedValue(entry);

      await expect(resolver.isTokenValid('user-1', nowSeconds)).resolves.toBe(
        false,
      );
    });

    it('returns true when the token was issued after the last password change', async () => {
      const entry = activeUserWithPermissions('colonies:read');
      entry.passwordChangedAt = new Date((nowSeconds - 60) * 1000);
      prisma.user.findUnique.mockResolvedValue(entry);

      await expect(resolver.isTokenValid('user-1', nowSeconds)).resolves.toBe(
        true,
      );
    });

    it('reads fresh every time and refreshes the cache for getPermissions', async () => {
      prisma.user.findUnique.mockResolvedValue(
        activeUserWithPermissions('colonies:read'),
      );

      await resolver.getPermissions('user-1');
      await resolver.isTokenValid('user-1', nowSeconds);
      await resolver.getPermissions('user-1');

      // One read for the first getPermissions, one fresh read for the
      // validity check - the second getPermissions uses that fresh entry.
      expect(prisma.user.findUnique).toHaveBeenCalledTimes(2);
    });

    it('sees a deactivation made elsewhere on the next request', async () => {
      prisma.user.findUnique.mockResolvedValueOnce(
        activeUserWithPermissions('colonies:read'),
      );
      await expect(resolver.isTokenValid('user-1', nowSeconds)).resolves.toBe(
        true,
      );
      prisma.user.findUnique.mockResolvedValueOnce({
        ...activeUserWithPermissions('colonies:read'),
        isActive: false,
      });
      await expect(resolver.isTokenValid('user-1', nowSeconds)).resolves.toBe(
        false,
      );
    });
  });

  it('re-queries after invalidateAll', async () => {
    prisma.user.findUnique.mockResolvedValue(
      activeUserWithPermissions('colonies:read'),
    );

    await resolver.getPermissions('user-1');
    resolver.invalidateAll();
    await resolver.getPermissions('user-1');

    expect(prisma.user.findUnique).toHaveBeenCalledTimes(2);
  });

  describe('hasAny', () => {
    it('returns true when the user holds at least one of the requested keys', async () => {
      prisma.user.findUnique.mockResolvedValue(
        activeUserWithPermissions('colonies:read'),
      );

      await expect(
        resolver.hasAny('user-1', ['tasks:create', 'colonies:read']),
      ).resolves.toBe(true);
    });

    it('returns false when the user holds none of the requested keys', async () => {
      prisma.user.findUnique.mockResolvedValue(
        activeUserWithPermissions('colonies:read'),
      );

      await expect(resolver.hasAny('user-1', ['tasks:create'])).resolves.toBe(
        false,
      );
    });

    it('returns true when no keys are required', async () => {
      await expect(resolver.hasAny('user-1', [])).resolves.toBe(true);
      expect(prisma.user.findUnique).not.toHaveBeenCalled();
    });
  });
});