import { BadRequestException } from '@nestjs/common';
import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
import { Allow } from 'class-validator';
import type {
    ContentStatus,
    UpdateContentStatusRequest,
} from '@doodle/contracts';
import {
    WorksheetQueryDto,
    parseWorksheetQuery,
} from '../worksheets/worksheet-query.dto';
import { contentStatus } from './content-policy';

/** 管理列表才接受 status；公开接口不复用此 DTO，避免开放草稿查询开关。 */
export class AdminWorksheetQueryDto extends WorksheetQueryDto {
    @Allow()
    @ApiPropertyOptional({
        enum: ['draft', 'active', 'hidden'],
        description: '省略查询全部状态',
    })
    declare status?: string;
}

/** 首期只提供状态写入，不开放未经白名单校验的渲染配置编辑。 */
export class UpdateContentStatusDto implements UpdateContentStatusRequest {
    @Allow()
    @ApiProperty({ enum: ['draft', 'active', 'hidden'] })
    declare status: ContentStatus;
}

/** 资源管理列表仅支持分页、所属题型和状态，不隐式套用题型年龄/年级条件。 */
export class AdminResourceQueryDto {
    @Allow()
    @ApiPropertyOptional({
        type: 'integer',
        default: 1,
        minimum: 1,
        maximum: 1000000,
    })
    declare page?: string;

    @Allow()
    @ApiPropertyOptional({
        type: 'integer',
        default: 20,
        minimum: 1,
        maximum: 100,
    })
    declare pageSize?: string;

    @Allow()
    @ApiPropertyOptional({ maxLength: 128 })
    declare worksheetId?: string;

    @Allow()
    @ApiPropertyOptional({ enum: ['draft', 'active', 'hidden'] })
    declare status?: string;
}

/** 服务层同样检查字段白名单，防止非 HTTP 调用绕过状态参数限制。 */
export function parseAdminWorksheetQuery(input: AdminWorksheetQueryDto) {
    const { status, ...query } = input;
    return {
        query: parseWorksheetQuery(query),
        status: status === undefined ? undefined : contentStatus(status),
    };
}

/** 严格解析资源分页和过滤；拒绝重复/未知字段，避免管理查询静默扩大范围。 */
export function parseAdminResourceQuery(input: AdminResourceQueryDto) {
    if (
        Object.keys(input).some(
            (key) =>
                !['page', 'pageSize', 'worksheetId', 'status'].includes(key),
        )
    )
        throw new BadRequestException();
    const { page, pageSize } = parseWorksheetQuery({
        ...(input.page === undefined ? {} : { page: input.page }),
        ...(input.pageSize === undefined ? {} : { pageSize: input.pageSize }),
    });
    const worksheetId = input.worksheetId;
    if (
        worksheetId !== undefined &&
        (typeof worksheetId !== 'string' ||
            !worksheetId.trim() ||
            [...worksheetId].length > 128 ||
            worksheetId.includes('\0'))
    )
        throw new BadRequestException();
    return {
        page,
        pageSize,
        worksheetId,
        status:
            input.status === undefined
                ? undefined
                : contentStatus(input.status),
    };
}