import { Column, CreateDateColumn, Entity, Index, PrimaryGeneratedColumn } from 'typeorm';

@Entity('wallet_transactions')
@Index(['studentId', 'createdAt'])
export class WalletTransaction {
  @PrimaryGeneratedColumn()
  id: number;

  @Column({ name: 'student_id', type: 'integer' })
  studentId: number;

  @Column({ name: 'bill_id', type: 'integer', nullable: true })
  billId: number | null;

  @Column({ name: 'operation_id', type: 'varchar', length: 64, nullable: true })
  operationId: string | null;

  @Column({ type: 'varchar', length: 30 })
  type: 'recharge' | 'adjustment' | 'bill_payment' | 'bill_refund';

  @Column({ type: 'decimal', precision: 12, scale: 2 })
  amount: number;

  @Column({ name: 'balance_after', type: 'decimal', precision: 12, scale: 2 })
  balanceAfter: number;

  @Column({ type: 'varchar', length: 300, nullable: true })
  description: string | null;

  @Column({ name: 'recorded_by', type: 'integer', nullable: true })
  recordedBy: number | null;

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