import {
  Entity,
  PrimaryGeneratedColumn,
  Column,
  ManyToOne,
  JoinColumn,
  CreateDateColumn,
} from 'typeorm';
import { Cluster } from './cluster.entity';
import { ClusterPool, PoolStrategy } from './cluster-pool.entity';
import { Application } from '../../applications/entities/application.entity';

export type ClusterAllocationStatus = 'success' | 'failed';

@Entity('cluster_allocation_logs')
export class ClusterAllocationLog {
  @PrimaryGeneratedColumn('uuid')
  id: string;

  // Explicit `type` required: `string | null` reflects as Object and crashes
  // TypeORM at metadata build (DataTypeNotSupportedError).
  @Column({ type: 'uuid', nullable: true })
  applicationId?: string | null;

  @ManyToOne(() => Application, { nullable: true, onDelete: 'SET NULL' })
  @JoinColumn({ name: 'applicationId' })
  application: Application;

  @Column()
  userId: string;

  @Column({ type: 'uuid', nullable: true })
  poolId?: string | null;

  @ManyToOne(() => ClusterPool, { nullable: true, onDelete: 'SET NULL' })
  @JoinColumn({ name: 'poolId' })
  pool: ClusterPool;

  @Column({ type: 'uuid', nullable: true })
  selectedClusterId?: string | null;

  @ManyToOne(() => Cluster, { nullable: true, onDelete: 'SET NULL' })
  @JoinColumn({ name: 'selectedClusterId' })
  selectedCluster: Cluster;

  @Column({ default: 'weighted-resource' })
  strategy: PoolStrategy;

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

  @Column({ type: 'jsonb', nullable: true })
  candidateScores: Record<string, any>[];

  @Column({ type: 'jsonb', nullable: true })
  rejectionReasons: Record<string, any>[];

  @Column({ default: 'success' })
  status: ClusterAllocationStatus;

  @Column({ nullable: true })
  message: string;

  @CreateDateColumn()
  createdAt: Date;
}