import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
import { Transform } from 'class-transformer';
import {
    IsBoolean,
    IsDateString,
    IsEnum,
    IsNotEmpty,
    IsOptional,
    IsString,
    IsUUID,
    MaxLength,
    ValidateIf,
} from 'class-validator';
import { GenreType, StatutEnfantType } from 'src/entities/children.entity';

/** Multipart envoie des strings ("true"/"false") — JSON envoie déjà des booleans. */
function toBoolean({ value }: { value: unknown }): boolean | unknown {
    if (typeof value === 'boolean') return value;
    if (typeof value === 'string') {
        const v = value.trim().toLowerCase();
        if (v === 'true' || v === '1') return true;
        if (v === 'false' || v === '0' || v === '') return false;
    }
    return value;
}

export class CreateEnfantsDto {
    @ApiProperty({ enum: StatutEnfantType, example: StatutEnfantType.SANS_GARDE })
    @IsEnum(StatutEnfantType)
    @IsNotEmpty()
    status: StatutEnfantType;

    @ApiProperty({ example: 'Georges', required: false })
    @IsOptional()
    @IsString()
    @MaxLength(100)
    first_name?: string;

    @ApiProperty({ example: 'Dupont', required: false })
    @IsOptional()
    @IsString()
    @MaxLength(100)
    last_name?: string;

    @ApiProperty({ enum: GenreType })
    @IsEnum(GenreType)
    @IsNotEmpty()
    gender: GenreType;

    @ApiProperty({ example: '2018-06-24', required: false })
    @ValidateIf(o => o.status !== StatutEnfantType.A_NAITRE)
    @IsOptional()
    @IsDateString()
    birth_date?: string;

    @ApiProperty({ example: '2025-12-15', required: false })
    @ValidateIf(o => o.status === StatutEnfantType.A_NAITRE)
    @IsOptional()
    @IsDateString()
    due_date?: string;

    @ApiProperty({ example: 'https://monimage.com/photo.jpg', required: false })
    @IsOptional()
    @IsString()
    photo_url?: string;

    @ApiProperty({ default: false })
    @Transform(toBoolean)
    @IsBoolean()
    consent_photo: boolean;

    @ApiProperty({ required: false })
    @IsOptional()
    @IsDateString()
    consent_photo_at?: string;

    @ApiProperty({ default: false })
    @Transform(toBoolean)
    @IsBoolean()
    is_multiple: boolean;

    /**
     * Parent pivot du foyer — obligatoire pour staff (gestionnaire/admin).
     * Ignoré / interdit en externe pour un PARENT (ticket #132).
     */
    @ApiPropertyOptional({
        description:
            'UUID du parent pivot (staff only). Obligatoire pour GESTIONNAIRE / ADMIN / SUPER_ADMIN.',
        format: 'uuid',
    })
    @IsOptional()
    @IsUUID('4')
    parent_user_id?: string;
}