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

export type PromptCategory = 'assistant' | 'analysis' | 'generation' | 'extraction';

@Entity({ name: 'prompts', schema: 'ai' })
@Unique(['tenantId', 'code', 'version'])
export class AIPrompt {
  @PrimaryGeneratedColumn('uuid')
  id: string;

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

  @Index()
  @Column({ name: 'code', type: 'varchar', length: 100 })
  code: string;

  @Column({ name: 'name', type: 'varchar', length: 200 })
  name: string;

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

  @Index()
  @Column({ name: 'category', type: 'varchar', length: 50, nullable: true })
  category: PromptCategory;

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

  @Column({ name: 'user_prompt_template', type: 'text' })
  userPromptTemplate: string;

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

  @Column({ name: 'temperature', type: 'decimal', precision: 3, scale: 2, default: 0.7 })
  temperature: number;

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

  @Column({ name: 'top_p', type: 'decimal', precision: 3, scale: 2, nullable: true })
  topP: number;

  @Column({ name: 'frequency_penalty', type: 'decimal', precision: 3, scale: 2, nullable: true })
  frequencyPenalty: number;

  @Column({ name: 'presence_penalty', type: 'decimal', precision: 3, scale: 2, nullable: true })
  presencePenalty: number;

  @Column({ name: 'required_variables', type: 'text', array: true, default: [] })
  requiredVariables: string[];

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

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

  @Column({ name: 'version', type: 'int', default: 1 })
  version: number;

  @Column({ name: 'is_latest', type: 'boolean', default: true })
  isLatest: boolean;

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

  @Index()
  @Column({ name: 'is_active', type: 'boolean', default: true })
  isActive: boolean;

  @Column({ name: 'is_system', type: 'boolean', default: false })
  isSystem: boolean;

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

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

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

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

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

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

  @ManyToOne(() => AIModel, { onDelete: 'SET NULL' })
  @JoinColumn({ name: 'model_id' })
  model: AIModel;
}