import {
  Entity,
  PrimaryGeneratedColumn,
  Column,
  CreateDateColumn,
  UpdateDateColumn,
  ManyToOne,
  OneToMany,
  JoinColumn,
  Index,
} from 'typeorm';
import { POSSession } from './pos-session.entity';
import { POSOrderLine } from './pos-order-line.entity';
import { POSPayment } from './pos-payment.entity';

export enum OrderStatus {
  DRAFT = 'draft',
  CONFIRMED = 'confirmed',
  PAID = 'paid',
  PARTIALLY_PAID = 'partially_paid',
  VOIDED = 'voided',
  REFUNDED = 'refunded',
}

export enum OrderType {
  SALE = 'sale',
  REFUND = 'refund',
  EXCHANGE = 'exchange',
}

@Entity('pos_orders', { schema: 'retail' })
@Index(['tenantId', 'branchId', 'createdAt'])
@Index(['tenantId', 'sessionId'])
@Index(['tenantId', 'customerId'])
@Index(['tenantId', 'number'], { unique: true })
export class POSOrder {
  @PrimaryGeneratedColumn('uuid')
  id: string;

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

  @Column({ name: 'branch_id', type: 'uuid' })
  branchId: string;

  @Column({ name: 'session_id', type: 'uuid' })
  sessionId: string;

  @Column({ name: 'register_id', type: 'uuid' })
  registerId: string;

  @Column({ name: 'user_id', type: 'uuid' })
  userId: string;

  @Column({ length: 30, unique: true })
  number: string;

  @Column({
    type: 'enum',
    enum: OrderType,
    default: OrderType.SALE,
  })
  type: OrderType;

  @Column({
    type: 'enum',
    enum: OrderStatus,
    default: OrderStatus.DRAFT,
  })
  status: OrderStatus;

  // Customer (optional, from erp-core partners)
  @Column({ name: 'customer_id', type: 'uuid', nullable: true })
  customerId: string;

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

  @Column({ name: 'customer_rfc', length: 13, nullable: true })
  customerRfc: string;

  // Salesperson (for commission tracking)
  @Column({ name: 'salesperson_id', type: 'uuid', nullable: true })
  salespersonId: string;

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

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

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

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

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

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

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

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

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

  // Tax breakdown
  @Column({ name: 'tax_breakdown', type: 'jsonb', nullable: true })
  taxBreakdown: {
    taxId: string;
    taxName: string;
    rate: number;
    base: number;
    amount: number;
  }[];

  // Currency
  @Column({ name: 'currency_code', length: 3, default: 'MXN' })
  currencyCode: string;

  @Column({ name: 'exchange_rate', type: 'decimal', precision: 10, scale: 6, default: 1 })
  exchangeRate: number;

  // Coupon/Promotion
  @Column({ name: 'coupon_id', type: 'uuid', nullable: true })
  couponId: string;

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

  @Column({ name: 'promotion_ids', type: 'jsonb', nullable: true })
  promotionIds: string[];

  // Loyalty points
  @Column({ name: 'loyalty_points_earned', type: 'int', default: 0 })
  loyaltyPointsEarned: number;

  @Column({ name: 'loyalty_points_redeemed', type: 'int', default: 0 })
  loyaltyPointsRedeemed: number;

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

  // Invoicing
  @Column({ name: 'requires_invoice', type: 'boolean', default: false })
  requiresInvoice: boolean;

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

  @Column({ name: 'invoice_status', length: 20, nullable: true })
  invoiceStatus: 'pending' | 'issued' | 'cancelled';

  // Reference to original order (for refunds/exchanges)
  @Column({ name: 'original_order_id', type: 'uuid', nullable: true })
  originalOrderId: string;

  // Void info
  @Column({ name: 'voided_at', type: 'timestamp with time zone', nullable: true })
  voidedAt: Date;

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

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

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

  // Offline sync
  @Column({ name: 'is_offline_order', type: 'boolean', default: false })
  isOfflineOrder: boolean;

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

  @Column({ name: 'synced_at', type: 'timestamp with time zone', nullable: true })
  syncedAt: Date;

  // Receipt
  @Column({ name: 'receipt_printed', type: 'boolean', default: false })
  receiptPrinted: boolean;

  @Column({ name: 'receipt_sent', type: 'boolean', default: false })
  receiptSent: boolean;

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

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

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

  @UpdateDateColumn({ name: 'updated_at' })
  updatedAt: Date;

  @Column({ name: 'completed_at', type: 'timestamp with time zone', nullable: true })
  completedAt: Date;

  // Relations
  @ManyToOne(() => POSSession, (session) => session.orders)
  @JoinColumn({ name: 'session_id' })
  session: POSSession;

  @OneToMany(() => POSOrderLine, (line) => line.order)
  lines: POSOrderLine[];

  @OneToMany(() => POSPayment, (payment) => payment.order)
  payments: POSPayment[];
}