import {
    Entity,
    PrimaryGeneratedColumn,
    Column,
    OneToMany,
    Index,
} from 'typeorm';
import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
import { CharacterSentence } from './character-sentence.entity';

@Entity('sentences')
export class Sentence {
    @ApiProperty({ description: '句子ID', example: 1 })
    @PrimaryGeneratedColumn({ type: 'bigint' })
    id: number;

    @ApiProperty({ description: '句子内容', example: '这是一个例句。' })
    @Column({ type: 'text' })
    @Index()
    content: string;

    @ApiPropertyOptional({
        description: '翻译（英语句子需要）',
        example: 'This is an example sentence.',
        nullable: true,
    })
    @Column({ type: 'text', nullable: true })
    translation: string | null;

    @ApiPropertyOptional({
        description: '音频文件路径',
        example: '/audio/sentence1.mp3',
        maxLength: 500,
        nullable: true,
    })
    @Column({ type: 'varchar', length: 500, nullable: true, name: 'audio_path' })
    audioPath: string | null;

    @ApiPropertyOptional({
        description: '来源（如教材名称）',
        example: '人教版语文一年级上册',
        maxLength: 100,
        nullable: true,
    })
    @Column({ type: 'varchar', length: 100, nullable: true })
    source: string | null;

    @OneToMany(() => CharacterSentence, (characterSentence) => characterSentence.sentence, {
        cascade: true,
    })
    characterSentences: CharacterSentence[];
}