import {
  Entity,
  PrimaryGeneratedColumn,
  Column,
  CreateDateColumn,
  Index,
  ManyToOne,
  JoinColumn,
} from 'typeorm';
import { AIModel } from './model.entity';
import { AIPrompt } from './prompt.entity';

export type CompletionStatus = 'pending' | 'processing' | 'completed' | 'failed';

@Entity({ name: 'completions', schema: 'ai' })
export class AICompletion {
  @PrimaryGeneratedColumn('uuid')
  id: string;

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

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

  @Index()
  @Column({ name: 'prompt_id', type: 'uuid', nullable: true })
  promptId: string;

  @Column({ name: 'prompt_code', type: 'varchar', length: 100, nullable: true })
  promptCode: string;

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

  @Column({ name: 'input_text', type: 'text' })
  inputText: string;

  @Column({ name: 'input_variables', type: 'jsonb', default: {} })
  inputVariables: Record<string, any>;

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

  @Column({ name: 'prompt_tokens', type: 'int', nullable: true })
  promptTokens: number;

  @Column({ name: 'completion_tokens', type: 'int', nullable: true })
  completionTokens: number;

  @Column({ name: 'total_tokens', type: 'int', nullable: true })
  totalTokens: number;

  @Column({ name: 'cost', type: 'decimal', precision: 10, scale: 6, nullable: true })
  cost: number;

  @Column({ name: 'latency_ms', type: 'int', nullable: true })
  latencyMs: number;

  @Column({ name: 'finish_reason', type: 'varchar', length: 30, nullable: true })
  finishReason: string;

  @Column({ name: 'status', type: 'varchar', length: 20, default: 'pending' })
  status: CompletionStatus;

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

  @Index()
  @Column({ name: 'context_type', type: 'varchar', length: 50, nullable: true })
  contextType: string;

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

  @Column({ name: 'metadata', type: 'jsonb', default: {} })
  metadata: Record<string, any>;

  @Index()
  @CreateDateColumn({ name: 'created_at', type: 'timestamptz' })
  createdAt: Date;

  @ManyToOne(() => AIModel, { nullable: true })
  @JoinColumn({ name: 'model_id' })
  model: AIModel;

  @ManyToOne(() => AIPrompt, { nullable: true })
  @JoinColumn({ name: 'prompt_id' })
  prompt: AIPrompt;
}