import {
    Body,
    Controller,
    Get,
    Headers,
    Inject,
    Param,
    Patch,
    Post,
    Query,
    Req,
    Res,
} from '@nestjs/common';
import { z } from 'zod';
import {
    bulkDeleteCollectionItemsRequestSchema,
    clearCollectionItemsRequestSchema,
    createCollectionItemRequestSchema,
    listCollectionItemsQuerySchema,
    materializeCollectionAssetsRequestSchema,
    retryCollectionAssetsRequestSchema,
    updateCollectionItemRequestSchema,
    type Workspace,
} from '@atlas/contracts';
import { ApiError } from '../common/api-error.js';
import type { AuthenticatedRequest } from '../auth/auth.guard.js';
import { CurrentWorkspace } from '../workspace/current-workspace.decorator.js';
import { CollectionService } from './collection.service.js';

type Response = { status: (value: number) => Response };
@Controller('collection-items')
export class CollectionController {
    /** 注入采集箱接口共用的应用服务。 */
    public constructor(
        @Inject(CollectionService)
        private readonly collection: CollectionService,
    ) {}
    /** 按页头平台上下文查询当前工作空间的采集箱。 */
    @Get() async list(
        @Query() query: unknown,
        @Headers('x-atlas-platform-id') platformId: string | undefined,
        @CurrentWorkspace() workspace: Workspace,
    ) {
        if (!platformId)
            throw new ApiError(
                400,
                'PLATFORM_CONTEXT_REQUIRED',
                '请求缺少 X-Atlas-Platform-Id',
            );
        return this.collection.list(
            workspace.id,
            requireUuid('X-Atlas-Platform-Id', platformId),
            parse(listCollectionItemsQuerySchema, query),
        );
    }
    /** 返回采集记录、解析证据、SKU 与当前快照的素材任务。 */
    @Get(':id') async detail(
        @Param('id') id: string,
        @CurrentWorkspace() workspace: Workspace,
    ) {
        return {
            data: await this.collection.detail(
                workspace.id,
                requireUuid('collection_item_id', id),
            ),
        };
    }
    /** 幂等地创建手工采集草稿及其默认商品和 SKU。 */
    @Post() async create(
        @Body() body: unknown,
        @Headers('idempotency-key') key: string | undefined,
        @Req() request: AuthenticatedRequest,
        @CurrentWorkspace() workspace: Workspace,
        @Res({ passthrough: true }) response: Response,
    ) {
        const result = await this.collection.create(
            workspace.id,
            request.auth.userId,
            requireKey(key),
            parse(createCollectionItemRequestSchema, body),
        );
        response.status(result.status);
        return result.body;
    }
    /** 通过 If-Match 乐观锁更新当前允许编辑的采集记录字段。 */
    @Patch(':id') async update(
        @Param('id') id: string,
        @Body() body: unknown,
        @Headers('idempotency-key') key: string | undefined,
        @Headers('if-match') match: string | undefined,
        @Req() request: AuthenticatedRequest,
        @CurrentWorkspace() workspace: Workspace,
    ) {
        return (
            await this.collection.update(
                workspace.id,
                request.auth.userId,
                requireUuid('collection_item_id', id),
                requireKey(key),
                revision(match),
                parse(updateCollectionItemRequestSchema, body),
            )
        ).body;
    }
    /** 幂等地软删除用户指定的多条采集记录。 */
    @Post('bulk-delete') async bulkDelete(
        @Body() body: unknown,
        @Headers('idempotency-key') key: string | undefined,
        @Req() request: AuthenticatedRequest,
        @CurrentWorkspace() workspace: Workspace,
        @Res({ passthrough: true }) response: Response,
    ) {
        const result = await this.collection.bulkDelete(
            workspace.id,
            request.auth.userId,
            requireKey(key),
            parse(bulkDeleteCollectionItemsRequestSchema, body),
        );
        response.status(result.status);
        return result.body;
    }
    /** 在数量确认未过期时，幂等地清空当前工作空间的采集箱。 */
    @Post('clear') async clear(
        @Body() body: unknown,
        @Headers('idempotency-key') key: string | undefined,
        @Req() request: AuthenticatedRequest,
        @CurrentWorkspace() workspace: Workspace,
        @Res({ passthrough: true }) response: Response,
    ) {
        const result = await this.collection.clear(
            workspace.id,
            request.auth.userId,
            requireKey(key),
            parse(clearCollectionItemsRequestSchema, body),
        );
        response.status(result.status);
        return result.body;
    }
    /** 将当前采集快照中失败或取消的素材任务重新投递给 Worker。 */
    @Post(':id/asset-retries') async retry(
        @Param('id') id: string,
        @Body() body: unknown,
        @Headers('idempotency-key') key: string | undefined,
        @Req() request: AuthenticatedRequest,
        @CurrentWorkspace() workspace: Workspace,
        @Res({ passthrough: true }) response: Response,
    ) {
        const result = await this.collection.retryAssets(
            workspace.id,
            request.auth.userId,
            requireUuid('collection_item_id', id),
            requireKey(key),
            parse(retryCollectionAssetsRequestSchema, body),
        );
        response.status(result.status);
        return result.body;
    }
    /** 将当前采集快照中用户选定的来源素材请求转存为 Atlas 素材。 */
    @Post(':id/asset-materializations') async materialize(
        @Param('id') id: string,
        @Body() body: unknown,
        @Headers('idempotency-key') key: string | undefined,
        @Req() request: AuthenticatedRequest,
        @CurrentWorkspace() workspace: Workspace,
        @Res({ passthrough: true }) response: Response,
    ) {
        const result = await this.collection.materializeAssets(
            workspace.id,
            request.auth.userId,
            requireUuid('collection_item_id', id),
            requireKey(key),
            parse(materializeCollectionAssetsRequestSchema, body),
        );
        response.status(result.status);
        return result.body;
    }
}
/** 使用契约 Schema 校验请求体或查询参数，并转换为统一错误响应。 */
function parse<
    T extends {
        safeParse: (input: unknown) => {
            success: boolean;
            data?: unknown;
            error?: { issues: Array<{ path: PropertyKey[]; message: string }> };
        };
    },
>(schema: T, input: unknown) {
    const result = schema.safeParse(input);
    if (result.success) return result.data as never;
    throw new ApiError(
        422,
        'VALIDATION_FAILED',
        '请求参数不符合要求',
        result.error?.issues.map((x) => ({
            field: x.path.join('.'),
            code: 'INVALID_FIELD',
            message: x.message,
        })),
    );
}
/** 校验路径、请求头中的 UUID 标识。 */
function requireUuid(field: string, value: string) {
    if (z.uuid().safeParse(value).success) return value;
    throw new ApiError(422, 'VALIDATION_FAILED', '请求参数不符合要求', [
        { field, code: 'INVALID_FIELD', message: `${field} 必须是 UUID` },
    ]);
}
/** 要求关键写操作提供可追踪的幂等键。 */
function requireKey(value: string | undefined) {
    if (!value)
        throw new ApiError(
            400,
            'IDEMPOTENCY_KEY_REQUIRED',
            '请求缺少 Idempotency-Key',
        );
    return requireUuid('Idempotency-Key', value);
}
/** 解析单资源更新使用的 If-Match 版本号。 */
function revision(value: string | undefined) {
    const valueMatch = value?.match(/^"([1-9]\d*)"$/);
    if (!valueMatch)
        throw new ApiError(
            400,
            'IF_MATCH_REQUIRED',
            '请求缺少或格式错误的 If-Match',
        );
    return Number(valueMatch[1]);
}