// src/tests/integration/admin.integration.test.ts
import { describe, it, expect, beforeAll, beforeEach, afterAll, vi } from 'vitest';
import supertest from 'supertest';
import { getPool } from '../../services/db/connection.db';
import type { UserProfile } from '../../types';
import { createAndLoginUser, TEST_EXAMPLE_DOMAIN } from '../utils/testHelpers';
import { cleanupDb } from '../utils/cleanup';
import {
  createStoreWithLocation,
  cleanupStoreLocations,
  type CreatedStoreLocation,
} from '../utils/storeHelpers';

/**
 * @vitest-environment node
 */

describe('Admin API Routes Integration Tests', () => {
  let request: ReturnType<typeof supertest>;
  let adminToken: string;
  let adminUser: UserProfile;
  let regularUser: UserProfile;
  let regularUserToken: string;
  const createdUserIds: string[] = [];
  const createdStoreLocations: CreatedStoreLocation[] = [];
  const createdCorrectionIds: number[] = [];
  const createdFlyerIds: number[] = [];

  beforeAll(async () => {
    vi.stubEnv('FRONTEND_URL', 'https://example.com');
    const app = (await import('../../../server')).default;
    request = supertest(app);

    // Create a fresh admin user and a regular user for this test suite
    // Using unique emails to prevent test pollution from other integration test files.
    ({ user: adminUser, token: adminToken } = await createAndLoginUser({
      email: `admin-integration-${Date.now()}@test.com`,
      role: 'admin',
      fullName: 'Admin Test User',
      request, // Pass supertest request to ensure user is created in the test DB
    }));
    createdUserIds.push(adminUser.user.user_id);

    ({ user: regularUser, token: regularUserToken } = await createAndLoginUser({
      email: `regular-integration-${Date.now()}@test.com`,
      fullName: 'Regular User',
      request, // Pass supertest request
    }));
    createdUserIds.push(regularUser.user.user_id);
  });

  afterAll(async () => {
    vi.unstubAllEnvs();
    await cleanupDb({
      userIds: createdUserIds,
      suggestedCorrectionIds: createdCorrectionIds,
      flyerIds: createdFlyerIds,
    });
    await cleanupStoreLocations(getPool(), createdStoreLocations);
  });

  describe('GET /api/admin/stats', () => {
    it('should allow an admin to fetch application stats', async () => {
      const response = await request
        .get('/api/admin/stats')
        .set('Authorization', `Bearer ${adminToken}`);
      const stats = response.body.data;
      // DEBUG: Log response if it fails expectation
      if (response.status !== 200) {
        console.error('[DEBUG] GET /api/admin/stats failed:', response.status, response.body);
      }
      expect(stats).toBeDefined();
      expect(stats).toHaveProperty('flyerCount');
      expect(stats).toHaveProperty('userCount');
      expect(stats).toHaveProperty('flyerItemCount');
    });

    it('should forbid a regular user from fetching application stats', async () => {
      const response = await request
        .get('/api/admin/stats')
        .set('Authorization', `Bearer ${regularUserToken}`);
      expect(response.status).toBe(403);
      const errorData = response.body.error;
      expect(errorData.message).toBe('Forbidden: Administrator access required.');
    });
  });

  describe('GET /api/admin/stats/daily', () => {
    it('should allow an admin to fetch daily stats', async () => {
      const response = await request
        .get('/api/admin/stats/daily')
        .set('Authorization', `Bearer ${adminToken}`);
      const dailyStats = response.body.data;
      expect(dailyStats).toBeDefined();
      expect(Array.isArray(dailyStats)).toBe(true);
      // We just created users in beforeAll, so we should have data
      expect(dailyStats.length).toBe(30);
      expect(dailyStats[0]).toHaveProperty('date');
      expect(dailyStats[0]).toHaveProperty('new_users');
      expect(dailyStats[0]).toHaveProperty('new_flyers');
    });

    it('should forbid a regular user from fetching daily stats', async () => {
      const response = await request
        .get('/api/admin/stats/daily')
        .set('Authorization', `Bearer ${regularUserToken}`);
      expect(response.status).toBe(403);
      const errorData = response.body.error;
      expect(errorData.message).toBe('Forbidden: Administrator access required.');
    });
  });

  describe('GET /api/admin/corrections', () => {
    it('should allow an admin to fetch suggested corrections', async () => {
      // This test just verifies access and correct response shape.
      // More detailed tests would require seeding corrections.
      const response = await request
        .get('/api/admin/corrections')
        .set('Authorization', `Bearer ${adminToken}`);
      const corrections = response.body.data;
      expect(corrections).toBeDefined();
      expect(Array.isArray(corrections)).toBe(true);
    });

    it('should forbid a regular user from fetching suggested corrections', async () => {
      const response = await request
        .get('/api/admin/corrections')
        .set('Authorization', `Bearer ${regularUserToken}`);
      expect(response.status).toBe(403);
      const errorData = response.body.error;
      expect(errorData.message).toBe('Forbidden: Administrator access required.');
    });
  });

  describe('GET /api/admin/brands', () => {
    it('should allow an admin to fetch all brands', async () => {
      const response = await request
        .get('/api/admin/brands')
        .set('Authorization', `Bearer ${adminToken}`);
      const brands = response.body.data;
      expect(brands).toBeDefined();
      expect(Array.isArray(brands)).toBe(true);
      // Even if no brands exist, it should return an array.
      // (We rely on seed or empty state here, which is fine for a read test,
      // but creating a brand would be strictly better if we wanted to assert length > 0)
    });

    it('should forbid a regular user from fetching all brands', async () => {
      const response = await request
        .get('/api/admin/brands')
        .set('Authorization', `Bearer ${regularUserToken}`);
      expect(response.status).toBe(403);
      const errorData = response.body.error;
      expect(errorData.message).toBe('Forbidden: Administrator access required.');
    });
  });

  describe('Admin Data Modification Routes', () => {
    let testStoreId: number;
    let testFlyerItemId: number;
    let testCorrectionId: number;

    // Create a store and flyer once for all tests in this block.
    beforeAll(async () => {
      // Create a dummy store with location to ensure foreign keys exist
      const store = await createStoreWithLocation(getPool(), {
        name: `Admin Test Store - ${Date.now()}`,
        address: '100 Admin St',
        city: 'Toronto',
        province: 'ON',
        postalCode: 'M5V 1A1',
      });
      testStoreId = store.storeId;
      createdStoreLocations.push(store);
    });

    // Before each modification test, create a fresh flyer item and a correction for it.
    beforeEach(async () => {
      const flyerRes = await getPool().query(
        `INSERT INTO public.flyers (store_id, file_name, image_url, icon_url, item_count, checksum) 
         VALUES ($1, 'admin-test.jpg', '${TEST_EXAMPLE_DOMAIN}/flyer-images/admin-test.jpg', '${TEST_EXAMPLE_DOMAIN}/flyer-images/icons/admin-test.jpg', 1, $2) RETURNING flyer_id`,
        // The checksum must be a unique 64-character string to satisfy the DB constraint.
        // We generate a dynamic string and pad it to 64 characters.
        [testStoreId, `checksum-${Date.now()}-${Math.random()}`.padEnd(64, '0')],
      );
      const flyerId = flyerRes.rows[0].flyer_id;
      createdFlyerIds.push(flyerId);

      const flyerItemRes = await getPool().query(
        `INSERT INTO public.flyer_items (flyer_id, item, price_display, price_in_cents, quantity)
         VALUES ($1, 'Test Item for Correction', '$1.99', 199, 'each') RETURNING flyer_item_id`,
        [flyerId],
      );
      testFlyerItemId = flyerItemRes.rows[0].flyer_item_id;

      const correctionRes = await getPool().query(
        `INSERT INTO public.suggested_corrections (flyer_item_id, user_id, correction_type, suggested_value, status)
         VALUES ($1, $2, 'WRONG_PRICE', '250', 'pending') RETURNING suggested_correction_id`,
        [testFlyerItemId, adminUser.user.user_id],
      );
      testCorrectionId = correctionRes.rows[0].suggested_correction_id;
      createdCorrectionIds.push(testCorrectionId);
    });

    it('should allow an admin to approve a correction', async () => {
      // Act: Approve the correction.
      const response = await request
        .post(`/api/admin/corrections/${testCorrectionId}/approve`)
        .set('Authorization', `Bearer ${adminToken}`);
      expect(response.status).toBe(200);

      // Assert: Verify the flyer item's price was updated and the correction status changed.
      const { rows: itemRows } = await getPool().query(
        'SELECT price_in_cents FROM public.flyer_items WHERE flyer_item_id = $1',
        [testFlyerItemId],
      );
      expect(itemRows[0].price_in_cents).toBe(250);

      const { rows: correctionRows } = await getPool().query(
        'SELECT status FROM public.suggested_corrections WHERE suggested_correction_id = $1',
        [testCorrectionId],
      );
      expect(correctionRows[0].status).toBe('approved');
    });

    it('should allow an admin to reject a correction', async () => {
      // Act: Reject the correction.
      const response = await request
        .post(`/api/admin/corrections/${testCorrectionId}/reject`)
        .set('Authorization', `Bearer ${adminToken}`);
      expect(response.status).toBe(200);

      // Assert: Verify the correction status changed.
      const { rows: correctionRows } = await getPool().query(
        'SELECT status FROM public.suggested_corrections WHERE suggested_correction_id = $1',
        [testCorrectionId],
      );
      expect(correctionRows[0].status).toBe('rejected');
    });

    it('should allow an admin to update a correction', async () => {
      // Act: Update the suggested value of the correction.
      const response = await request
        .put(`/api/admin/corrections/${testCorrectionId}`)
        .set('Authorization', `Bearer ${adminToken}`)
        .send({ suggested_value: '300' });
      const updatedCorrection = response.body.data;

      // Assert: Verify the API response and the database state.
      expect(updatedCorrection.suggested_value).toBe('300');
      const { rows } = await getPool().query(
        'SELECT suggested_value FROM public.suggested_corrections WHERE suggested_correction_id = $1',
        [testCorrectionId],
      );
      expect(rows[0].suggested_value).toBe('300');
    });

    it('should allow an admin to update a recipe status', async () => {
      // Create a recipe specifically for this test
      const recipeRes = await getPool().query(
        `INSERT INTO public.recipes (name, instructions, user_id) VALUES ('Admin Test Recipe', 'Cook it', $1) RETURNING recipe_id`,
        [regularUser.user.user_id],
      );
      const recipeId = recipeRes.rows[0].recipe_id;

      // Act: Update the status to 'public'.
      const response = await request
        .put(`/api/admin/recipes/${recipeId}/status`)
        .set('Authorization', `Bearer ${adminToken}`)
        .send({ status: 'public' });
      expect(response.status).toBe(200);

      // Assert: Verify the status was updated in the database.
      const { rows: updatedRecipeRows } = await getPool().query(
        'SELECT status FROM public.recipes WHERE recipe_id = $1',
        [recipeId],
      );
      expect(updatedRecipeRows[0].status).toBe('public');
    });
  });

  describe('DELETE /api/admin/users/:id', () => {
    it("should allow an admin to delete another user's account", async () => {
      // Create a dedicated user for this deletion test to avoid affecting other tests
      const { user: userToDelete } = await createAndLoginUser({
        email: `delete-target-${Date.now()}@test.com`,
        fullName: 'User To Delete',
        request,
      });

      // Act: Call the delete endpoint as an admin.
      const response = await request
        .delete(`/api/admin/users/${userToDelete.user.user_id}`)
        .set('Authorization', `Bearer ${adminToken}`);

      // Assert: Check for a successful deletion status.
      expect(response.status).toBe(204);
    });

    it('should prevent an admin from deleting their own account', async () => {
      // Act: Call the delete endpoint as the same admin user.
      const adminUserId = adminUser.user.user_id;
      const response = await request
        .delete(`/api/admin/users/${adminUserId}`)
        .set('Authorization', `Bearer ${adminToken}`);

      // Assert:
      // The service throws ValidationError, which maps to 400.
      // We also allow 403 in case authorization middleware catches it in the future.
      if (response.status !== 400 && response.status !== 403) {
        console.error(
          '[DEBUG] Self-deletion failed with unexpected status:',
          response.status,
          response.body,
        );
      }
      expect([400, 403]).toContain(response.status);
      expect(response.body.error.message).toMatch(/Admins cannot delete their own account/);
    });

    it('should return 404 if the user to be deleted is not found', async () => {
      // Arrange: Use a valid UUID that does not exist
      const notFoundUserId = '00000000-0000-0000-0000-000000000000';

      const response = await request
        .delete(`/api/admin/users/${notFoundUserId}`)
        .set('Authorization', `Bearer ${adminToken}`);

      // Assert: Check for a 404 status code
      expect(response.status).toBe(404);
    });
  });

  describe('Queue Management Routes', () => {
    describe('GET /api/admin/queues/status', () => {
      it('should return queue status for all queues', async () => {
        const response = await request
          .get('/api/admin/queues/status')
          .set('Authorization', `Bearer ${adminToken}`);

        expect(response.status).toBe(200);
        expect(response.body.success).toBe(true);
        expect(response.body.data).toBeInstanceOf(Array);

        // Should have data for each queue
        if (response.body.data.length > 0) {
          const firstQueue = response.body.data[0];
          expect(firstQueue).toHaveProperty('name');
          expect(firstQueue).toHaveProperty('counts');
        }
      });

      it('should forbid regular users from viewing queue status', async () => {
        const response = await request
          .get('/api/admin/queues/status')
          .set('Authorization', `Bearer ${regularUserToken}`);

        expect(response.status).toBe(403);
        expect(response.body.error.message).toBe('Forbidden: Administrator access required.');
      });
    });

    describe('POST /api/admin/trigger/analytics-report', () => {
      it('should enqueue an analytics report job', async () => {
        const response = await request
          .post('/api/admin/trigger/analytics-report')
          .set('Authorization', `Bearer ${adminToken}`);

        expect(response.status).toBe(202); // 202 Accepted for async job enqueue
        expect(response.body.success).toBe(true);
        expect(response.body.data.message).toContain('enqueued');
      });

      it('should forbid regular users from triggering analytics report', async () => {
        const response = await request
          .post('/api/admin/trigger/analytics-report')
          .set('Authorization', `Bearer ${regularUserToken}`);

        expect(response.status).toBe(403);
      });
    });

    describe('POST /api/admin/trigger/weekly-analytics', () => {
      it('should enqueue a weekly analytics job', async () => {
        const response = await request
          .post('/api/admin/trigger/weekly-analytics')
          .set('Authorization', `Bearer ${adminToken}`);

        expect(response.status).toBe(202); // 202 Accepted for async job enqueue
        expect(response.body.success).toBe(true);
        expect(response.body.data.message).toContain('enqueued');
      });

      it('should forbid regular users from triggering weekly analytics', async () => {
        const response = await request
          .post('/api/admin/trigger/weekly-analytics')
          .set('Authorization', `Bearer ${regularUserToken}`);

        expect(response.status).toBe(403);
      });
    });

    describe('POST /api/admin/trigger/daily-deal-check', () => {
      it('should enqueue a daily deal check job', async () => {
        const response = await request
          .post('/api/admin/trigger/daily-deal-check')
          .set('Authorization', `Bearer ${adminToken}`);

        expect(response.status).toBe(202); // 202 Accepted for async job trigger
        expect(response.body.success).toBe(true);
        expect(response.body.data.message).toContain('triggered');
      });

      it('should forbid regular users from triggering daily deal check', async () => {
        const response = await request
          .post('/api/admin/trigger/daily-deal-check')
          .set('Authorization', `Bearer ${regularUserToken}`);

        expect(response.status).toBe(403);
      });
    });

    describe('POST /api/admin/system/clear-cache', () => {
      it('should clear the application cache', async () => {
        const response = await request
          .post('/api/admin/system/clear-cache')
          .set('Authorization', `Bearer ${adminToken}`);

        expect(response.status).toBe(200);
        expect(response.body.success).toBe(true);
        expect(response.body.data.message).toContain('cleared');
      });

      it('should forbid regular users from clearing cache', async () => {
        const response = await request
          .post('/api/admin/system/clear-cache')
          .set('Authorization', `Bearer ${regularUserToken}`);

        expect(response.status).toBe(403);
      });
    });

    describe('POST /api/admin/jobs/:queue/:id/retry', () => {
      it('should return validation error for invalid queue name', async () => {
        const response = await request
          .post('/api/admin/jobs/invalid-queue-name/1/retry')
          .set('Authorization', `Bearer ${adminToken}`);

        expect(response.status).toBe(400);
        expect(response.body.success).toBe(false);
        expect(response.body.error.code).toBe('VALIDATION_ERROR');
      });

      it('should return 404 for non-existent job', async () => {
        const response = await request
          .post('/api/admin/jobs/flyer-processing/999999999/retry')
          .set('Authorization', `Bearer ${adminToken}`);

        expect(response.status).toBe(404);
        expect(response.body.success).toBe(false);
      });

      it('should forbid regular users from retrying jobs', async () => {
        const response = await request
          .post('/api/admin/jobs/flyer-processing/1/retry')
          .set('Authorization', `Bearer ${regularUserToken}`);

        expect(response.status).toBe(403);
      });
    });
  });

  describe('GET /api/admin/users', () => {
    it('should return all users for admin', async () => {
      const response = await request
        .get('/api/admin/users')
        .set('Authorization', `Bearer ${adminToken}`);

      expect(response.status).toBe(200);
      expect(response.body.success).toBe(true);
      // The endpoint returns { users: [...], total: N }
      expect(response.body.data).toHaveProperty('users');
      expect(response.body.data).toHaveProperty('total');
      expect(response.body.data.users).toBeInstanceOf(Array);
      expect(typeof response.body.data.total).toBe('number');
    });

    it('should forbid regular users from listing all users', async () => {
      const response = await request
        .get('/api/admin/users')
        .set('Authorization', `Bearer ${regularUserToken}`);

      expect(response.status).toBe(403);
    });
  });

  describe('GET /api/admin/review/flyers', () => {
    it('should return pending review flyers for admin', async () => {
      const response = await request
        .get('/api/admin/review/flyers')
        .set('Authorization', `Bearer ${adminToken}`);

      expect(response.status).toBe(200);
      expect(response.body.success).toBe(true);
      expect(response.body.data).toBeInstanceOf(Array);
    });

    it('should forbid regular users from viewing pending flyers', async () => {
      const response = await request
        .get('/api/admin/review/flyers')
        .set('Authorization', `Bearer ${regularUserToken}`);

      expect(response.status).toBe(403);
    });
  });
});