import { apiRequest } from './api-request';
import type { ApiWorksheet } from './content-api';

export type AdminAction =
    | 'categories.list'
    | 'categories.create'
    | 'categories.update'
    | 'worksheets.list'
    | 'worksheets.status'
    | 'worksheets.batch'
    | 'site.config'
    | 'site.rebuild'
    | 'site.timer';
interface AdminWorksheet extends ApiWorksheet {
    status: 'draft' | 'active' | 'hidden';
    likesDisplay: string;
    downloadsDisplay: string;
    likesSeed: string;
    downloadsSeed: string;
}
interface AdminPage {
    items: AdminWorksheet[];
    total: number;
    hasNext: boolean;
    page: number;
    pageSize: number;
}
/** 管理页迁移适配：只调用具名 REST 接口，旧页面展示字段在客户端映射，不传旧用户身份。 */
export async function managementRequest<T>(
    action: AdminAction,
    payload: Record<string, unknown> = {},
): Promise<{
    success: boolean;
    data?: T;
    stats?: { total: number; active: number; draft: number; hidden: number };
    message?: string;
}> {
    let data: unknown;
    let stats;
    switch (action) {
        case 'categories.list': {
            const rows =
                await apiRequest<Array<{ id: string }>>('/admin/categories');
            data = rows.map((row) => ({ ...row, _id: row.id }));
            break;
        }
        case 'categories.create':
            data = await apiRequest('/admin/categories', {
                method: 'POST',
                data: payload,
            });
            break;
        case 'categories.update': {
            const { id, ...fields } = payload;
            data = await apiRequest(
                `/admin/categories/${encodeURIComponent(String(id))}`,
                { method: 'PUT', data: fields },
            );
            break;
        }
        case 'worksheets.list': {
            const rows: AdminWorksheet[] = [];
            let expected: number | undefined;
            for (let page = 1; ; page++) {
                const response = await apiRequest<AdminPage>(
                    '/admin/catalog/worksheets',
                    {
                        data: {
                            page,
                            pageSize: 100,
                            ...(payload.category
                                ? { categoryId: payload.category }
                                : {}),
                            ...(payload.status
                                ? { status: payload.status }
                                : {}),
                        },
                    },
                );
                if (
                    response.page !== page ||
                    response.pageSize !== 100 ||
                    !Array.isArray(response.items) ||
                    !Number.isSafeInteger(response.total) ||
                    (expected !== undefined && response.total !== expected) ||
                    response.hasNext !== page * 100 < response.total
                )
                    throw new Error('管理目录发生变化，请重试');
                expected = response.total;
                rows.push(...response.items);
                if (!response.hasNext) break;
            }
            if (
                rows.length !== expected ||
                new Set(rows.map((row) => row.id)).size !== rows.length
            )
                throw new Error('管理目录发生变化，请重试');
            data = rows.map((row) => ({
                ...row,
                _id: row.id,
                likes: payload.rawStats ? row.likes : row.likesDisplay,
                downloads: payload.rawStats
                    ? row.downloads
                    : row.downloadsDisplay,
            }));
            stats = {
                total: rows.length,
                active: rows.filter((row) => row.status === 'active').length,
                draft: rows.filter((row) => row.status === 'draft').length,
                hidden: rows.filter((row) => row.status === 'hidden').length,
            };
            break;
        }
        case 'worksheets.status':
            data = await apiRequest(
                `/admin/worksheets/${encodeURIComponent(String(payload.id))}/status`,
                { method: 'PUT', data: { status: payload.status } },
            );
            break;
        case 'worksheets.batch': {
            const patches = (
                payload.patches as Array<Record<string, unknown>>
            ).map(({ likes_seed, downloads_seed, ...row }) => ({
                ...row,
                ...(likes_seed === undefined ? {} : { likesSeed: likes_seed }),
                ...(downloads_seed === undefined
                    ? {}
                    : { downloadsSeed: downloads_seed }),
            }));
            data = await apiRequest('/admin/worksheets/batch', {
                method: 'POST',
                timeout: 60000,
                data: { patches, dryRun: payload.dryRun === true },
            });
            break;
        }
        case 'site.config':
            data = await apiRequest('/admin/site/config');
            break;
        case 'site.rebuild':
            data = await apiRequest('/admin/site/rebuild', {
                method: 'POST',
                timeout: 60000,
                data: payload,
            });
            break;
        case 'site.timer':
            data = await apiRequest('/admin/site/timer', {
                method: 'PUT',
                data: { enabled: payload.enabled },
            });
            break;
        default:
            throw new Error('不支持的管理操作');
    }
    if (
        [
            'categories.create',
            'categories.update',
            'worksheets.status',
            'worksheets.batch',
            'site.rebuild',
        ].includes(action)
    ) {
        const app = getApp<IAppOption>();
        if (typeof app.refreshPageConfig === 'function')
            await app.refreshPageConfig();
    }
    return { success: true, data: data as T, ...(stats ? { stats } : {}) };
}