import { INestApplication, ValidationPipe } from '@nestjs/common';
import { Test, TestingModule } from '@nestjs/testing';
import { ConfigModule, ConfigService } from '@nestjs/config';
import { TypeOrmModule } from '@nestjs/typeorm';
import { JwtModule, JwtService } from '@nestjs/jwt';
import * as request from 'supertest';
import { DataSource } from 'typeorm';
import * as bcrypt from 'bcrypt';

import { AuthModule } from '../src/modules/auth/auth.module';
import { UsersModule } from '../src/modules/users/users.module';
import { StoresModule } from '../src/modules/stores/stores.module';
import { InventoryModule } from '../src/modules/inventory/inventory.module';
import { CreditsModule } from '../src/modules/credits/credits.module';
import { User } from '../src/modules/users/entities/user.entity';
import { Store } from '../src/modules/stores/entities/store.entity';
import { StoreUser } from '../src/modules/stores/entities/store-user.entity';
import { InventoryItem } from '../src/modules/inventory/entities/inventory-item.entity';
import { Video } from '../src/modules/videos/entities/video.entity';
import { Otp } from '../src/modules/auth/entities/otp.entity';
import { RefreshToken } from '../src/modules/auth/entities/refresh-token.entity';
import { CreditBalance } from '../src/modules/credits/entities/credit-balance.entity';
import { CreditTransaction } from '../src/modules/credits/entities/credit-transaction.entity';
import { CreditPackage } from '../src/modules/credits/entities/credit-package.entity';

describe('InventoryController (e2e)', () => {
  let app: INestApplication;
  let dataSource: DataSource;
  let jwtService: JwtService;
  let accessToken: string;
  let userId: string;
  let storeId: string;

  beforeAll(async () => {
    const moduleFixture: TestingModule = await Test.createTestingModule({
      imports: [
        ConfigModule.forRoot({
          isGlobal: true,
        }),
        TypeOrmModule.forRootAsync({
          imports: [ConfigModule],
          useFactory: () => ({
            type: 'postgres',
            host: process.env.DATABASE_HOST || 'localhost',
            port: parseInt(process.env.DATABASE_PORT || '5433'),
            username: process.env.DATABASE_USER || 'postgres',
            password: process.env.DATABASE_PASSWORD || 'postgres',
            database: process.env.DATABASE_NAME || 'miinventario_test',
            entities: [
              User, Store, StoreUser, InventoryItem, Video,
              Otp, RefreshToken, CreditBalance, CreditTransaction, CreditPackage
            ],
            synchronize: true,
            dropSchema: true,
          }),
          inject: [ConfigService],
        }),
        JwtModule.register({
          secret: 'test-secret',
          signOptions: { expiresIn: '15m' },
        }),
        AuthModule,
        UsersModule,
        StoresModule,
        InventoryModule,
        CreditsModule,
      ],
    })
      .overrideProvider(ConfigService)
      .useValue({
        get: (key: string, defaultValue?: any) => {
          const config: Record<string, any> = {
            NODE_ENV: 'development',
            DATABASE_HOST: process.env.DATABASE_HOST || 'localhost',
            DATABASE_PORT: parseInt(process.env.DATABASE_PORT || '5433'),
            DATABASE_NAME: process.env.DATABASE_NAME || 'miinventario_test',
            DATABASE_USER: process.env.DATABASE_USER || 'postgres',
            DATABASE_PASSWORD: process.env.DATABASE_PASSWORD || 'postgres',
            JWT_SECRET: 'test-secret',
            JWT_EXPIRES_IN: '15m',
            JWT_REFRESH_SECRET: 'test-refresh-secret',
            JWT_REFRESH_EXPIRES_IN: '7d',
          };
          return config[key] ?? defaultValue;
        },
      })
      .compile();

    app = moduleFixture.createNestApplication();
    app.useGlobalPipes(
      new ValidationPipe({
        whitelist: true,
        forbidNonWhitelisted: true,
        transform: true,
      }),
    );

    await app.init();
    dataSource = moduleFixture.get<DataSource>(DataSource);
    jwtService = moduleFixture.get<JwtService>(JwtService);
  });

  afterAll(async () => {
    if (dataSource?.isInitialized) {
      await dataSource.destroy();
    }
    await app.close();
  });

  beforeEach(async () => {
    // Clean up - order matters due to foreign keys
    await dataSource.query('DELETE FROM inventory_items');
    await dataSource.query('DELETE FROM videos');
    await dataSource.query('DELETE FROM store_users');
    await dataSource.query('DELETE FROM stores');
    await dataSource.query('DELETE FROM credit_transactions');
    await dataSource.query('DELETE FROM credit_balances');
    await dataSource.query('DELETE FROM refresh_tokens');
    await dataSource.query('DELETE FROM otps');
    await dataSource.query('DELETE FROM users');

    // Create test user
    const passwordHash = await bcrypt.hash('testpassword123', 10);
    const userResult = await dataSource.query(
      `INSERT INTO users (id, phone, name, "passwordHash", role, "isActive")
       VALUES (uuid_generate_v4(), '5512345678', 'Test User', $1, 'USER', true)
       RETURNING id`,
      [passwordHash],
    );
    userId = userResult[0].id;

    // Create credit balance
    await dataSource.query(
      `INSERT INTO credit_balances (id, "userId", balance, "totalPurchased", "totalConsumed", "totalFromReferrals")
       VALUES (uuid_generate_v4(), $1, 100, 100, 0, 0)`,
      [userId],
    );

    // Create test store
    const storeResult = await dataSource.query(
      `INSERT INTO stores (id, "ownerId", name, giro, address, "isActive")
       VALUES (uuid_generate_v4(), $1, 'Test Store', 'Abarrotes', 'Test Address', true)
       RETURNING id`,
      [userId],
    );
    storeId = storeResult[0].id;

    // Create inventory items
    await dataSource.query(
      `INSERT INTO inventory_items (id, "storeId", name, category, quantity, price, "minStock")
       VALUES
         (uuid_generate_v4(), $1, 'Coca Cola 600ml', 'Bebidas', 50, 18.00, 10),
         (uuid_generate_v4(), $1, 'Sabritas Original', 'Snacks', 25, 15.50, 5),
         (uuid_generate_v4(), $1, 'Pan Bimbo', 'Panaderia', 3, 45.00, 5)`,
      [storeId],
    );

    // Generate token
    accessToken = jwtService.sign({ sub: userId });
  });

  describe('GET /stores/:storeId/inventory', () => {
    it('should return inventory items for the store', async () => {
      const response = await request(app.getHttpServer())
        .get(`/stores/${storeId}/inventory`)
        .set('Authorization', `Bearer ${accessToken}`)
        .expect(200);

      expect(response.body.items).toHaveLength(3);
      expect(response.body.total).toBe(3);
      expect(response.body.page).toBe(1);
      expect(response.body).toHaveProperty('hasMore');
    });

    it('should support pagination', async () => {
      const response = await request(app.getHttpServer())
        .get(`/stores/${storeId}/inventory?page=1&limit=2`)
        .set('Authorization', `Bearer ${accessToken}`)
        .expect(200);

      expect(response.body.items).toHaveLength(2);
      expect(response.body.limit).toBe(2);
    });

    it('should fail without authentication', async () => {
      await request(app.getHttpServer())
        .get(`/stores/${storeId}/inventory`)
        .expect(401);
    });

    it('should fail for store owned by another user', async () => {
      // Create another user and store
      const otherUserResult = await dataSource.query(
        `INSERT INTO users (id, phone, name, role, "isActive")
         VALUES (uuid_generate_v4(), '9999999999', 'Other User', 'USER', true)
         RETURNING id`,
      );
      const otherUserId = otherUserResult[0].id;

      const otherStoreResult = await dataSource.query(
        `INSERT INTO stores (id, "ownerId", name, giro, "isActive")
         VALUES (uuid_generate_v4(), $1, 'Other Store', 'Farmacia', true)
         RETURNING id`,
        [otherUserId],
      );
      const otherStoreId = otherStoreResult[0].id;

      // The API returns 403 Forbidden when accessing stores you don't own
      await request(app.getHttpServer())
        .get(`/stores/${otherStoreId}/inventory`)
        .set('Authorization', `Bearer ${accessToken}`)
        .expect(403);
    });
  });

  describe('GET /stores/:storeId/inventory/statistics', () => {
    it('should return inventory statistics', async () => {
      const response = await request(app.getHttpServer())
        .get(`/stores/${storeId}/inventory/statistics`)
        .set('Authorization', `Bearer ${accessToken}`)
        .expect(200);

      expect(response.body).toHaveProperty('totalItems');
      expect(response.body).toHaveProperty('totalValue');
      expect(response.body).toHaveProperty('lowStockCount');
    });
  });

  describe('GET /stores/:storeId/inventory/low-stock', () => {
    it('should return low stock items', async () => {
      const response = await request(app.getHttpServer())
        .get(`/stores/${storeId}/inventory/low-stock`)
        .set('Authorization', `Bearer ${accessToken}`)
        .expect(200);

      // Pan Bimbo has quantity 3 and minStock 5, so it should be low stock
      expect(response.body).toBeInstanceOf(Array);
      const lowStockItem = response.body.find((item: any) => item.name === 'Pan Bimbo');
      expect(lowStockItem).toBeDefined();
    });
  });

  describe('GET /stores/:storeId/inventory/categories', () => {
    it('should return categories', async () => {
      const response = await request(app.getHttpServer())
        .get(`/stores/${storeId}/inventory/categories`)
        .set('Authorization', `Bearer ${accessToken}`)
        .expect(200);

      expect(response.body).toBeInstanceOf(Array);
      expect(response.body.length).toBeGreaterThan(0);
    });
  });

  describe('GET /stores/:storeId/inventory/:itemId', () => {
    let itemId: string;

    beforeEach(async () => {
      const result = await dataSource.query(
        `SELECT id FROM inventory_items WHERE "storeId" = $1 LIMIT 1`,
        [storeId],
      );
      itemId = result[0].id;
    });

    it('should return a specific inventory item', async () => {
      const response = await request(app.getHttpServer())
        .get(`/stores/${storeId}/inventory/${itemId}`)
        .set('Authorization', `Bearer ${accessToken}`)
        .expect(200);

      expect(response.body).toHaveProperty('id', itemId);
      expect(response.body).toHaveProperty('name');
      expect(response.body).toHaveProperty('quantity');
    });

    it('should fail for non-existent item', async () => {
      await request(app.getHttpServer())
        .get(`/stores/${storeId}/inventory/00000000-0000-0000-0000-000000000000`)
        .set('Authorization', `Bearer ${accessToken}`)
        .expect(404);
    });
  });

  describe('PATCH /stores/:storeId/inventory/:itemId', () => {
    let itemId: string;

    beforeEach(async () => {
      const result = await dataSource.query(
        `SELECT id FROM inventory_items WHERE "storeId" = $1 LIMIT 1`,
        [storeId],
      );
      itemId = result[0].id;
    });

    it('should update inventory item', async () => {
      const response = await request(app.getHttpServer())
        .patch(`/stores/${storeId}/inventory/${itemId}`)
        .set('Authorization', `Bearer ${accessToken}`)
        .send({ quantity: 100, price: 20.00 })
        .expect(200);

      expect(response.body.quantity).toBe(100);
      expect(parseFloat(response.body.price)).toBe(20.00);
    });

    it('should fail for non-existent item', async () => {
      await request(app.getHttpServer())
        .patch(`/stores/${storeId}/inventory/00000000-0000-0000-0000-000000000000`)
        .set('Authorization', `Bearer ${accessToken}`)
        .send({ quantity: 100 })
        .expect(404);
    });
  });

  describe('DELETE /stores/:storeId/inventory/:itemId', () => {
    let itemId: string;

    beforeEach(async () => {
      const result = await dataSource.query(
        `SELECT id FROM inventory_items WHERE "storeId" = $1 LIMIT 1`,
        [storeId],
      );
      itemId = result[0].id;
    });

    it('should delete inventory item', async () => {
      await request(app.getHttpServer())
        .delete(`/stores/${storeId}/inventory/${itemId}`)
        .set('Authorization', `Bearer ${accessToken}`)
        .expect(200);

      // Verify item is deleted
      const items = await dataSource.query(
        'SELECT * FROM inventory_items WHERE id = $1',
        [itemId],
      );
      expect(items).toHaveLength(0);
    });

    it('should fail for non-existent item', async () => {
      await request(app.getHttpServer())
        .delete(`/stores/${storeId}/inventory/00000000-0000-0000-0000-000000000000`)
        .set('Authorization', `Bearer ${accessToken}`)
        .expect(404);
    });
  });
});