/**
 * ════════════════════════════════════════════════════════════
 * مُصادَق (Musadaq) — Invoice Entity
 * ════════════════════════════════════════════════════════════
 */

import {
  Entity,
  PrimaryGeneratedColumn,
  Column,
  CreateDateColumn,
  UpdateDateColumn,
  ManyToOne,
  OneToMany,
  JoinColumn,
  Index,
} from 'typeorm';
import { Tenant } from '../../tenants/entities/tenant.entity';
import { Company } from '../../companies/entities/company.entity';
import { InvoiceLine } from './invoice-line.entity';

export enum InvoiceStatus {
  UPLOADED = 'uploaded',
  EXTRACTING = 'extracting',
  EXTRACTED = 'extracted',
  VALIDATED = 'validated',
  VALIDATION_FAILED = 'validation_failed',
  SUBMITTING = 'submitting',
  APPROVED = 'approved',
  REJECTED = 'rejected',
}

@Entity('invoices')
export class Invoice {
  @PrimaryGeneratedColumn('uuid')
  id!: string;

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

  @ManyToOne(() => Tenant, { onDelete: 'CASCADE' })
  @JoinColumn({ name: 'tenant_id' })
  tenant!: Tenant;

  @Column({ name: 'company_id', type: 'uuid' })
  company_id!: string;

  @ManyToOne(() => Company, { onDelete: 'CASCADE' })
  @JoinColumn({ name: 'company_id' })
  company!: Company;

  // ── Invoice Identity ─────────────────────────────────────
  @Column({ type: 'varchar', length: 100, nullable: true })
  invoice_number?: string;

  @Column({ type: 'date', nullable: true })
  invoice_date?: Date;

  @Column({ type: 'enum', enum: ['cash', 'credit'], default: 'cash' })
  invoice_type!: 'cash' | 'credit';

  @Column({ type: 'varchar', length: 3, default: '388' }) // 388: Sales, 381: Credit Note
  ubl_type_code!: string;

  @Column({ type: 'varchar', length: 3, default: '013' }) // 013: Cash, 023: Credit
  payment_method_code!: string;

  // ── Parties ──────────────────────────────────────────────
  @Column({ type: 'varchar', length: 20, nullable: true })
  supplier_tin?: string;

  @Column({ type: 'varchar', length: 255, nullable: true })
  supplier_name?: string;

  @Column({ type: 'text', nullable: true })
  supplier_address?: string;

  @Column({ type: 'varchar', length: 20, nullable: true })
  buyer_tin?: string;

  @Column({ type: 'varchar', length: 20, nullable: true })
  buyer_national_id?: string;

  @Column({ type: 'varchar', length: 255, nullable: true })
  buyer_name?: string;

  // ── Totals (decimal 15,3) ────────────────────────────────
  @Column({ type: 'decimal', precision: 15, scale: 3, default: 0 })
  subtotal!: number;

  @Column({ type: 'decimal', precision: 15, scale: 3, default: 0 })
  discount_total!: number;

  @Column({ type: 'decimal', precision: 15, scale: 3, default: 0 })
  tax_amount!: number;

  @Column({ type: 'decimal', precision: 15, scale: 3, default: 0 })
  grand_total!: number;

  @Column({ type: 'char', length: 3, default: 'JOD' })
  currency_code!: string;

  // ── Processing Status ────────────────────────────────────
  @Column({ type: 'enum', enum: InvoiceStatus, default: InvoiceStatus.UPLOADED })
  status!: InvoiceStatus;

  @Column({ type: 'text', nullable: true })
  original_file_path?: string;

  @Column({ type: 'varchar', length: 20, default: 'simplified' })
  invoice_category!: string;

  @Column({ type: 'jsonb', nullable: true })
  validation_errors?: string[];

  @Column({ type: 'text', nullable: true })
  qr_code?: string;

  @Column({ type: 'decimal', precision: 4, scale: 3, nullable: true })
  ai_confidence_score?: number;

  @CreateDateColumn({ type: 'timestamp' })
  created_at!: Date;

  @UpdateDateColumn({ type: 'timestamp' })
  updated_at!: Date;

  // ── One-to-Many Relationship ─────────────────────────────
  @OneToMany(() => InvoiceLine, (line) => line.invoice, { cascade: true })
  lines!: InvoiceLine[];
}