'use server';

import { ResultDto } from '@/types/response/common';
import {
	StockBoardPostsResponse,
	TrendingStocksResponse,
	PostPredictionResponse,
	TrackRecordResponse,
	LeaderboardResponse,
	CreateStockPostRequest,
	CreateStockPostResponse,
	EquippedItemsResponse
} from '@/types/community';
import { fetchJson } from '@/lib/utils/server';
import { fetchPublicJson } from '@/lib/utils/publicFetch';

const JSON_HEADERS = { 'Accept': 'application/json' } as const;

// 종목 가상보드 글 목록 (익명 · SSR) — GET /api/stock-boards/{code}/posts?page=
export async function fetchStockBoardPosts(code: string, params: { page?: number; perPage?: number }): Promise<ResultDto<StockBoardPostsResponse>>
{
	const queryParams = new URLSearchParams();

	queryParams.set('page', String(params.page ?? 1));
	queryParams.set('perPage', String(params.perPage ?? 20));

	return await fetchJson<StockBoardPostsResponse>(`/api/stock-boards/${encodeURIComponent(code)}/posts?${queryParams.toString()}`, {
		method: 'GET',
		headers: JSON_HEADERS
	});
}

// 종목 트렌딩 랭킹 (익명 공통 · SSR) — GET /api/stock-boards/trending?count=
// Data Cache(tag 'stock-data', 5분 재검증) — /stock 목록 워터폴의 두 번째 콜을 캐시로 흡수.
export async function fetchTrendingStocks(params: { count?: number } = {}): Promise<ResultDto<TrendingStocksResponse>>
{
	const queryParams = new URLSearchParams();

	queryParams.set('count', String(params.count ?? 20));

	return await fetchPublicJson<TrendingStocksResponse>(`/api/stock-boards/trending?${queryParams.toString()}`, { revalidate: 300, tags: ['stock-data'] });
}

// 글의 예측 메타 + 채점 상태 (익명 · SSR) — GET /api/posts/{id}/prediction
export async function fetchPostPrediction(postID: number): Promise<ResultDto<PostPredictionResponse>>
{
	return await fetchJson<PostPredictionResponse>(`/api/posts/${postID}/prediction`, {
		method: 'GET',
		headers: JSON_HEADERS
	});
}

// 회원 트랙레코드 (익명 · SSR · 회원 SID 기준) — GET /api/members/{sid}/track-record
export async function fetchTrackRecord(sid: string): Promise<ResultDto<TrackRecordResponse>>
{
	return await fetchJson<TrackRecordResponse>(`/api/members/${encodeURIComponent(sid)}/track-record`, {
		method: 'GET',
		headers: JSON_HEADERS
	});
}

// 적중률 리더보드 (익명 · SSR) — GET /api/track-records/leaderboard?page=
export async function fetchTrackRecordLeaderboard(params: { page?: number; period?: string } = {}): Promise<ResultDto<LeaderboardResponse>>
{
	const queryParams = new URLSearchParams();

	queryParams.set('page', String(params.page ?? 1));
	if (params.period) queryParams.set('period', params.period);

	return await fetchJson<LeaderboardResponse>(`/api/track-records/leaderboard?${queryParams.toString()}`, {
		method: 'GET',
		headers: JSON_HEADERS
	});
}

// 종목 가상보드 글 작성 (JWT · SSR) — POST /api/boards/stock/posts
export async function createStockBoardPost(body: CreateStockPostRequest): Promise<ResultDto<CreateStockPostResponse>>
{
	return await fetchJson<CreateStockPostResponse>('/api/boards/stock/posts', {
		method: 'POST',
		headers: { ...JSON_HEADERS, 'Content-Type': 'application/json' },
		body: JSON.stringify(body)
	});
}

// 작성자 지위 배지 배치 조회 (익명 · SSR) — GET /api/members/equipped-items?ids=1,2,3
export async function fetchEquippedItems(memberIDs: number[]): Promise<ResultDto<EquippedItemsResponse>>
{
	const ids = memberIDs.filter(id => id > 0).join(',');

	return await fetchJson<EquippedItemsResponse>(`/api/members/equipped-items?ids=${ids}`, {
		method: 'GET',
		headers: JSON_HEADERS
	});
}