import { describe, it, expect, beforeEach } from 'vitest'
import { setActivePinia, createPinia } from 'pinia'
import { useOrderStore, useCustomerStore, useInventoryStore } from '@/stores'
import type { Order } from '@/stores'

describe('Order Workflow Integration Tests', () => {
  beforeEach(() => {
    setActivePinia(createPinia())
  })

  describe('Complete Order Lifecycle', () => {
    it('should create order → update → delete workflow', async () => {
      const orderStore = useOrderStore()
      const customerStore = useCustomerStore()

      // Step 1: Fetch customers
      await customerStore.fetchCustomers()
      expect(customerStore.activeCustomers.length).toBeGreaterThanOrEqual(0)

      // Step 2: Create order
      const newOrder = await orderStore.createOrder({
        customerId: 'cust-001',
        customerName: 'Test Customer',
        orderDate: '2026-08-01',
        dueDate: '2026-08-15',
        items: [
          {
            id: 'item-001',
            lineNumber: 1,
            productId: 'prod-001',
            productSku: 'SKU-12345',
            quantity: 100,
            unitPrice: 50,
            lineTotal: 5000
          }
        ],
        subtotal: 5000,
        tax: 500,
        total: 5500
      })

      expect(newOrder).toBeDefined()
      expect(newOrder.status).toBe('DRAFT')
      expect(orderStore.orderCount).toBeGreaterThan(0)

      // Step 3: Update order
      const updated = await orderStore.updateOrder(newOrder.id, {
        status: 'CONFIRMED',
        notes: 'Updated via workflow test'
      })

      expect(updated.status).toBe('CONFIRMED')
      expect(updated.notes).toBe('Updated via workflow test')

      // Step 4: Delete order
      await orderStore.deleteOrder(newOrder.id)
      expect(orderStore.orders.find((o) => o.id === newOrder.id)).toBeUndefined()
    })

    it('should filter orders by status', async () => {
      const orderStore = useOrderStore()

      await orderStore.fetchOrders()
      
      // Set filter
      orderStore.setFilter({ status: 'CONFIRMED' })
      expect(orderStore.filter.status).toBe('CONFIRMED')

      // Filter computed
      const filtered = orderStore.filteredOrders
      expect(filtered.every((o) => o.status === 'CONFIRMED')).toBe(true)

      // Clear filter
      orderStore.clearFilter()
      expect(orderStore.filter.status).toBe('ALL')
    })

    it('should calculate order totals correctly', async () => {
      const orderStore = useOrderStore()

      const order = await orderStore.createOrder({
        customerId: 'cust-001',
        customerName: 'Test',
        orderDate: '2026-08-01',
        dueDate: '2026-08-15',
        items: [
          {
            id: '1',
            lineNumber: 1,
            productId: 'p1',
            productSku: 'SKU-001',
            quantity: 100,
            unitPrice: 50,
            lineTotal: 5000
          },
          {
            id: '2',
            lineNumber: 2,
            productId: 'p2',
            productSku: 'SKU-002',
            quantity: 50,
            unitPrice: 30,
            lineTotal: 1500
          }
        ],
        subtotal: 6500,
        tax: 650,
        total: 7150
      })

      expect(order.subtotal).toBe(6500)
      expect(order.tax).toBe(650)
      expect(order.total).toBe(7150)
    })

    it('should track recent orders', async () => {
      const orderStore = useOrderStore()

      // Create multiple orders
      for (let i = 0; i < 3; i++) {
        await orderStore.createOrder({
          customerId: `cust-${i}`,
          customerName: `Customer ${i}`,
          orderDate: '2026-08-01',
          dueDate: '2026-08-15',
          items: [],
          subtotal: 1000,
          tax: 100,
          total: 1100
        })
      }

      const recent = orderStore.recentOrders
      expect(recent.length).toBeLessThanOrEqual(5)
    })
  })

  describe('Order Status Transitions', () => {
    it('should transition through valid statuses', async () => {
      const orderStore = useOrderStore()

      const order = await orderStore.createOrder({
        customerId: 'cust-001',
        customerName: 'Test',
        orderDate: '2026-08-01',
        dueDate: '2026-08-15',
        items: [],
        subtotal: 0,
        tax: 0,
        total: 0
      })

      const statuses = ['DRAFT', 'PENDING', 'CONFIRMED', 'SHIPPED', 'DELIVERED']
      let current = order

      for (const status of statuses) {
        current = await orderStore.updateOrder(current.id, { status: status as any })
        expect(current.status).toBe(status)
      }
    })

    it('should count orders by status', async () => {
      const orderStore = useOrderStore()

      for (let i = 0; i < 3; i++) {
        await orderStore.createOrder({
          customerId: 'cust-001',
          customerName: 'Test',
          orderDate: '2026-08-01',
          dueDate: '2026-08-15',
          items: [],
          subtotal: 0,
          tax: 0,
          total: 0,
          status: i === 0 ? 'CONFIRMED' : 'PENDING'
        } as any)
      }

      const byStatus = orderStore.ordersByStatus
      expect(byStatus['CONFIRMED']).toBeGreaterThan(0)
      expect(byStatus['PENDING']).toBeGreaterThan(0)
    })
  })

  describe('Order Validation', () => {
    it('should require customer for order', async () => {
      const orderStore = useOrderStore()

      const order = await orderStore.createOrder({
        customerId: '',
        customerName: '',
        orderDate: '2026-08-01',
        dueDate: '2026-08-15',
        items: [],
        subtotal: 0,
        tax: 0,
        total: 0
      })

      expect(order.customerId).toBe('')
      // Validation would be enforced at form level
    })

    it('should handle empty order items', async () => {
      const orderStore = useOrderStore()

      const order = await orderStore.createOrder({
        customerId: 'cust-001',
        customerName: 'Test',
        orderDate: '2026-08-01',
        dueDate: '2026-08-15',
        items: [],
        subtotal: 0,
        tax: 0,
        total: 0
      })

      expect(order.items.length).toBe(0)
    })
  })
})