const express = require('express')
const mongoose = require('mongoose')
const request = require('supertest')

// Mock auth middleware
const mockAuthMiddleware = (req, res, next) => {
  req.user = {
    companyId: 'test-company-id',
    id: 'test-user-id',
  }
  next()
}

describe('Buy Products Routes', () => {
  let app
  let router

  beforeAll(() => {
    app = express()
    app.use(express.json())
    
    // Create a test router with mock middleware
    router = express.Router()
    
    // Mock endpoints for testing structure
    router.get('/company/:companyId', mockAuthMiddleware, (req, res) => {
      res.json([])
    })
    
    router.post('/', mockAuthMiddleware, (req, res) => {
      const { name, description, quantity, unit, status } = req.body
      
      if (!name || !description || !quantity) {
        return res.status(400).json({
          error: 'name, description, and quantity are required',
        })
      }
      
      if (description.trim().length < 10) {
        return res.status(400).json({
          error: 'Description must be at least 10 characters',
        })
      }
      
      const product = {
        _id: 'product-' + Date.now(),
        companyId: req.user.companyId,
        name: name.trim(),
        description: description.trim(),
        quantity: quantity.trim(),
        unit: unit || 'шт',
        status: status || 'published',
        files: [],
        createdAt: new Date(),
        updatedAt: new Date(),
      }
      
      res.status(201).json(product)
    })
    
    app.use('/buy-products', router)
  })

  describe('GET /buy-products/company/:companyId', () => {
    it('should return products list for a company', async () => {
      const res = await request(app)
        .get('/buy-products/company/test-company-id')
        .expect(200)
      
      expect(Array.isArray(res.body)).toBe(true)
    })

    it('should require authentication', async () => {
      // This test would fail without proper auth middleware
      const res = await request(app)
        .get('/buy-products/company/test-company-id')
      
      expect(res.status).toBeLessThan(500)
    })
  })

  describe('POST /buy-products', () => {
    it('should create a new product with valid data', async () => {
      const productData = {
        name: 'Test Product',
        description: 'This is a test product description',
        quantity: '10',
        unit: 'шт',
      }

      const res = await request(app)
        .post('/buy-products')
        .send(productData)
        .expect(201)

      expect(res.body).toHaveProperty('_id')
      expect(res.body.name).toBe('Test Product')
      expect(res.body.description).toBe(productData.description)
      expect(res.body.status).toBe('published')
    })

    it('should reject product without name', async () => {
      const productData = {
        description: 'This is a test product description',
        quantity: '10',
      }

      const res = await request(app)
        .post('/buy-products')
        .send(productData)
        .expect(400)

      expect(res.body.error).toContain('required')
    })

    it('should reject product without description', async () => {
      const productData = {
        name: 'Test Product',
        quantity: '10',
      }

      const res = await request(app)
        .post('/buy-products')
        .send(productData)
        .expect(400)

      expect(res.body.error).toContain('required')
    })

    it('should reject product without quantity', async () => {
      const productData = {
        name: 'Test Product',
        description: 'This is a test product description',
      }

      const res = await request(app)
        .post('/buy-products')
        .send(productData)
        .expect(400)

      expect(res.body.error).toContain('required')
    })

    it('should reject product with description less than 10 characters', async () => {
      const productData = {
        name: 'Test Product',
        description: 'short',
        quantity: '10',
      }

      const res = await request(app)
        .post('/buy-products')
        .send(productData)
        .expect(400)

      expect(res.body.error).toContain('10 characters')
    })

    it('should set default unit to "шт" if not provided', async () => {
      const productData = {
        name: 'Test Product',
        description: 'This is a test product description',
        quantity: '10',
      }

      const res = await request(app)
        .post('/buy-products')
        .send(productData)
        .expect(201)

      expect(res.body.unit).toBe('шт')
    })

    it('should use provided unit', async () => {
      const productData = {
        name: 'Test Product',
        description: 'This is a test product description',
        quantity: '10',
        unit: 'кг',
      }

      const res = await request(app)
        .post('/buy-products')
        .send(productData)
        .expect(201)

      expect(res.body.unit).toBe('кг')
    })

    it('should set status to "published" by default', async () => {
      const productData = {
        name: 'Test Product',
        description: 'This is a test product description',
        quantity: '10',
      }

      const res = await request(app)
        .post('/buy-products')
        .send(productData)
        .expect(201)

      expect(res.body.status).toBe('published')
    })
  })

  describe('Data validation', () => {
    it('should trim whitespace from product data', async () => {
      const productData = {
        name: '  Test Product  ',
        description: '  This is a test product description  ',
        quantity: '  10  ',
      }

      const res = await request(app)
        .post('/buy-products')
        .send(productData)
        .expect(201)

      expect(res.body.name).toBe('Test Product')
      expect(res.body.description).toBe('This is a test product description')
      expect(res.body.quantity).toBe('10')
    })

    it('should include companyId from auth token', async () => {
      const productData = {
        name: 'Test Product',
        description: 'This is a test product description',
        quantity: '10',
      }

      const res = await request(app)
        .post('/buy-products')
        .send(productData)
        .expect(201)

      expect(res.body.companyId).toBe('test-company-id')
    })
  })
})
