import {
  Entity,
  PrimaryGeneratedColumn,
  Column,
  CreateDateColumn,
  ManyToOne,
  JoinColumn,
  Index,
} from 'typeorm';
import { EcommerceOrder } from './ecommerce-order.entity';

export enum OrderLineStatus {
  PENDING = 'pending',
  RESERVED = 'reserved',
  FULFILLED = 'fulfilled',
  SHIPPED = 'shipped',
  DELIVERED = 'delivered',
  CANCELLED = 'cancelled',
  RETURNED = 'returned',
  REFUNDED = 'refunded',
}

@Entity('ecommerce_order_lines', { schema: 'retail' })
@Index(['tenantId', 'orderId'])
@Index(['tenantId', 'productId'])
export class EcommerceOrderLine {
  @PrimaryGeneratedColumn('uuid')
  id: string;

  @Column({ name: 'tenant_id', type: 'uuid' })
  @Index()
  tenantId: string;

  @Column({ name: 'order_id', type: 'uuid' })
  orderId: string;

  @Column({ name: 'line_number', type: 'int' })
  lineNumber: number;

  @Column({
    type: 'enum',
    enum: OrderLineStatus,
    default: OrderLineStatus.PENDING,
  })
  status: OrderLineStatus;

  // Product (from erp-core)
  @Column({ name: 'product_id', type: 'uuid' })
  productId: string;

  @Column({ name: 'product_code', length: 50 })
  productCode: string;

  @Column({ name: 'product_name', length: 200 })
  productName: string;

  @Column({ name: 'product_slug', length: 255, nullable: true })
  productSlug: string;

  @Column({ name: 'product_image', length: 255, nullable: true })
  productImage: string;

  // Variant
  @Column({ name: 'variant_id', type: 'uuid', nullable: true })
  variantId: string;

  @Column({ name: 'variant_name', length: 200, nullable: true })
  variantName: string;

  @Column({ name: 'variant_sku', length: 50, nullable: true })
  variantSku: string;

  @Column({ name: 'variant_options', type: 'jsonb', nullable: true })
  variantOptions: {
    name: string;
    value: string;
  }[];

  // Quantity
  @Column({ type: 'decimal', precision: 15, scale: 4, default: 1 })
  quantity: number;

  @Column({ name: 'quantity_fulfilled', type: 'decimal', precision: 15, scale: 4, default: 0 })
  quantityFulfilled: number;

  @Column({ name: 'quantity_refunded', type: 'decimal', precision: 15, scale: 4, default: 0 })
  quantityRefunded: number;

  // UOM
  @Column({ name: 'uom_id', type: 'uuid', nullable: true })
  uomId: string;

  @Column({ name: 'uom_name', length: 20, default: 'PZA' })
  uomName: string;

  // Pricing
  @Column({ name: 'unit_price', type: 'decimal', precision: 15, scale: 4 })
  unitPrice: number;

  @Column({ name: 'original_price', type: 'decimal', precision: 15, scale: 4 })
  originalPrice: number;

  // Discounts
  @Column({ name: 'discount_percent', type: 'decimal', precision: 5, scale: 2, default: 0 })
  discountPercent: number;

  @Column({ name: 'discount_amount', type: 'decimal', precision: 15, scale: 2, default: 0 })
  discountAmount: number;

  @Column({ name: 'promotion_id', type: 'uuid', nullable: true })
  promotionId: string;

  @Column({ name: 'promotion_name', length: 100, nullable: true })
  promotionName: string;

  // Tax
  @Column({ name: 'tax_id', type: 'uuid', nullable: true })
  taxId: string;

  @Column({ name: 'tax_rate', type: 'decimal', precision: 5, scale: 4, default: 0 })
  taxRate: number;

  @Column({ name: 'tax_amount', type: 'decimal', precision: 15, scale: 2, default: 0 })
  taxAmount: number;

  @Column({ name: 'tax_included', type: 'boolean', default: true })
  taxIncluded: boolean;

  // Totals
  @Column({ type: 'decimal', precision: 15, scale: 2, default: 0 })
  subtotal: number;

  @Column({ type: 'decimal', precision: 15, scale: 2, default: 0 })
  total: number;

  // Cost
  @Column({ name: 'unit_cost', type: 'decimal', precision: 15, scale: 4, nullable: true })
  unitCost: number;

  // Weight (for shipping calculation)
  @Column({ type: 'decimal', precision: 10, scale: 4, nullable: true })
  weight: number;

  @Column({ name: 'weight_unit', length: 5, default: 'kg' })
  weightUnit: string;

  // Warehouse
  @Column({ name: 'warehouse_id', type: 'uuid', nullable: true })
  warehouseId: string;

  // Lot/Serial
  @Column({ name: 'lot_number', length: 50, nullable: true })
  lotNumber: string;

  @Column({ name: 'serial_number', length: 50, nullable: true })
  serialNumber: string;

  // Custom options
  @Column({ name: 'custom_options', type: 'jsonb', nullable: true })
  customOptions: {
    name: string;
    value: string;
    price?: number;
  }[];

  // Gift
  @Column({ name: 'is_gift', type: 'boolean', default: false })
  isGift: boolean;

  @Column({ name: 'gift_message', type: 'text', nullable: true })
  giftMessage: string;

  // Refund
  @Column({ name: 'refunded_at', type: 'timestamp with time zone', nullable: true })
  refundedAt: Date;

  @Column({ name: 'refund_amount', type: 'decimal', precision: 15, scale: 2, default: 0 })
  refundAmount: number;

  @Column({ name: 'refund_reason', length: 255, nullable: true })
  refundReason: string;

  // Notes
  @Column({ type: 'text', nullable: true })
  notes: string;

  // Metadata
  @Column({ type: 'jsonb', nullable: true })
  metadata: Record<string, any>;

  @CreateDateColumn({ name: 'created_at' })
  createdAt: Date;

  // Relations
  @ManyToOne(() => EcommerceOrder, (order) => order.lines)
  @JoinColumn({ name: 'order_id' })
  order: EcommerceOrder;
}