// src/api.js
// 프론트와 API가 동일 도메인(nginx 프록시)이므로 항상 상대 경로 사용.
// 절대 URL(VITE_API_BASE)은 Mixed Content를 유발하므로 사용하지 않음.
const toApiUrl = (path) => path;

export async function apiGet(path) {
  const res = await fetch(toApiUrl(path), {
    headers: { "Accept": "application/json" },
  });
  if (!res.ok) {
    const text = await res.text().catch(() => "");
    throw new Error(`HTTP ${res.status} ${res.statusText}: ${text}`);
  }
  return res.json();
}

export async function apiDelete(path) {
  const res = await fetch(toApiUrl(path), { method: "DELETE" });
  if (!res.ok) {
    const text = await res.text().catch(() => "");
    throw new Error(`HTTP ${res.status} ${res.statusText}: ${text}`);
  }
  return res.json();
}

export async function apiPost(path, body) {
  const res = await fetch(toApiUrl(path), {
    method: "POST",
    headers: {
      "Accept": "application/json",
      ...(body ? { "Content-Type": "application/json" } : {}),
    },
    body: body ? JSON.stringify(body) : undefined,
  });
  if (!res.ok) {
    const text = await res.text().catch(() => "");
    throw new Error(`HTTP ${res.status} ${res.statusText}: ${text}`);
  }
  return res.json();
}

export async function apiPut(path, body) {
  const res = await fetch(toApiUrl(path), {
    method: "PUT",
    headers: {
      "Accept": "application/json",
      ...(body ? { "Content-Type": "application/json" } : {}),
    },
    body: body ? JSON.stringify(body) : undefined,
  });
  if (!res.ok) {
    const text = await res.text().catch(() => "");
    throw new Error(`HTTP ${res.status} ${res.statusText}: ${text}`);
  }
  return res.json();
}

export function getLatest() {
  return apiGet("/api/lotto/latest");
}

export function getStats() {
  return apiGet("/api/lotto/stats");
}

export function recommend(params) {
  const qs = new URLSearchParams({
    recent_window: String(params.recent_window),
    recent_weight: String(params.recent_weight),
    avoid_recent_k: String(params.avoid_recent_k),
  });
  return apiGet(`/api/lotto/recommend?${qs.toString()}`);
}

export function getHistory(limit = 30, offset = 0) {
  return apiGet(`/api/history?limit=${limit}&offset=${offset}`);
}

export function deleteHistory(id) {
  return apiDelete(`/api/history/${id}`);
}

// ── 시뮬레이션 관련 API ──────────────────────────────────────────────────────

export function getBestPicks(limit = 20) {
  return apiGet(`/api/lotto/best?limit=${limit}`);
}

export function getAnalysis() {
  return apiGet('/api/lotto/analysis');
}

export function triggerSimulate(nCandidates = 20000, topK = 100, bestN = 20) {
  const qs = new URLSearchParams({
    n_candidates: String(nCandidates),
    top_k: String(topK),
    best_n: String(bestN),
  });
  return apiPost(`/api/admin/simulate?${qs.toString()}`);
}

export function getStockNews(limit = 20, category) {
  const qs = new URLSearchParams({ limit: String(limit) });
  if (category) {
    qs.set("category", category);
  }
  return apiGet(`/api/stock/news?${qs.toString()}`);
}

export function getStockIndices() {
  return apiGet("/api/stock/indices");
}

export function getTradeBalance() {
  return apiGet("/api/trade/balance");
}

export function createTradeOrder(payload) {
  return apiPost("/api/trade/order", payload);
}

// ── 포트폴리오 (수동 입력) API ──────────────────────────────────────────────

export function getPortfolio() {
  return apiGet("/api/portfolio");
}

export function addPortfolio(item) {
  return apiPost("/api/portfolio", item);
}

export function updatePortfolio(id, fields) {
  return apiPut(`/api/portfolio/${id}`, fields);
}

export function deletePortfolio(id) {
  return apiDelete(`/api/portfolio/${id}`);
}

// ── 자산 스냅샷 API ──────────────────────────────────────────────────────────
// 장 마감 시점 총 자산을 기록하고, 기간별 추이를 조회합니다.

// GET /api/portfolio/snapshot/history?days=N
// response: { history: [{ date: "2026-03-07", total_assets: 12345678 }, ...] }
export function getAssetHistory(days = 30) {
  const qs = days ? `?days=${days}` : '';
  return apiGet(`/api/portfolio/snapshot/history${qs}`);
}

// POST /api/portfolio/snapshot  (body 없이 호출 — 서버가 현재 total_assets 계산해서 저장)
// 또는 body: { total_assets: number } 로 직접 지정 가능
export function saveAssetSnapshot(total_assets) {
  return apiPost('/api/portfolio/snapshot', total_assets != null ? { total_assets } : undefined);
}

// ── 예수금 API ───────────────────────────────────────────────────────────────

export function upsertCash(broker, cash) {
  return apiPut('/api/portfolio/cash', { broker, cash });
}

export function deleteCash(broker) {
  return apiDelete(`/api/portfolio/cash/${encodeURIComponent(broker)}`);
}

// ── 시장 심리 지표 API ────────────────────────────────────────────────────────

// CNN Fear & Greed Index (개발: vite proxy /ext/feargreed, 프로덕션: nginx proxy 필요)
export async function getFearAndGreed() {
  const res = await fetch('/ext/feargreed', { headers: { Accept: 'application/json' } });
  if (!res.ok) throw new Error(`HTTP ${res.status}`);
  return res.json();
}

// Yahoo Finance chart API 공통 파서
async function fetchYahooPrice(extPath) {
  const res = await fetch(extPath, { headers: { Accept: 'application/json' } });
  if (!res.ok) throw new Error(`HTTP ${res.status}`);
  const data = await res.json();
  const meta = data?.chart?.result?.[0]?.meta;
  const price = meta?.regularMarketPrice;
  const prevClose = meta?.previousClose ?? meta?.chartPreviousClose;
  if (price == null) throw new Error('데이터 없음');
  const rounded = Math.round(price * 100) / 100;
  const change = prevClose != null ? Math.round((price - prevClose) * 100) / 100 : null;
  const changePercent = prevClose ? Math.round(((price - prevClose) / prevClose) * 10000) / 100 : null;
  return { value: rounded, change, changePercent };
}

// VIX 지수 (Yahoo Finance 공개 API)
export function getVix() { return fetchYahooPrice('/ext/vix'); }

// 미국 10년물 국채 금리 (^TNX)
export function getTreasury10Y() { return fetchYahooPrice('/ext/treasury'); }

// WTI 원유 선물 (CL=F)
export function getWTI() { return fetchYahooPrice('/ext/wti'); }

// Brent 원유 선물 (BZ=F)
export function getBrent() { return fetchYahooPrice('/ext/brent'); }

// ── TODO API ─────────────────────────────────────────────────────────────────

export function getTodos() {
  return apiGet('/api/todos');
}

export function addTodo(data) {
  return apiPost('/api/todos', data);
}

export function updateTodo(id, data) {
  return apiPut(`/api/todos/${id}`, data);
}

export function deleteTodo(id) {
  return apiDelete(`/api/todos/${id}`);
}

export function clearTodos() {
  return apiDelete('/api/todos/done');
}

// ── 실현손익 내역 API ─────────────────────────────────────────────────────────
// GET  /api/portfolio/sell-history?broker=X&days=N  → { records: [...] }
// POST /api/portfolio/sell-history                  → 저장된 레코드 반환
// DELETE /api/portfolio/sell-history/:id            → { ok: true }

export function getSellHistory({ broker, days } = {}) {
  const qs = new URLSearchParams();
  if (broker && broker !== 'ALL') qs.set('broker', broker);
  if (days) qs.set('days', String(days));
  const q = qs.toString();
  return apiGet(`/api/portfolio/sell-history${q ? '?' + q : ''}`);
}

export function addSellHistory(record) {
  return apiPost('/api/portfolio/sell-history', record);
}

export function updateSellHistory(id, record) {
  return apiPut(`/api/portfolio/sell-history/${id}`, record);
}

export function deleteSellHistory(id) {
  return apiDelete(`/api/portfolio/sell-history/${id}`);
}

// ── AI 음악 생성 API ──────────────────────────────────────────────────────────

// GET /api/music/providers → { providers: [{ id, name, description, features }] }
export function getMusicProviders() {
  return apiGet('/api/music/providers');
}

// POST /api/music/generate
// body: { provider, genre, moods, instruments, duration_sec, bpm, key, scale, prompt, lyrics, instrumental }
// → { task_id: string, provider: string }
export function generateMusic(payload) {
  return apiPost('/api/music/generate', payload);
}

// GET /api/music/status/:task_id
// → { status, progress, message, audio_url?, error?, provider?, track? }
export function getMusicStatus(taskId) {
  return apiGet(`/api/music/status/${encodeURIComponent(taskId)}`);
}

// POST /api/music/lyrics  body: { prompt }
// → { id, status, text } (Suno 가사 생성)
export function generateMusicLyrics(prompt) {
  return apiPost('/api/music/lyrics', { prompt });
}

// GET /api/music/library
// → { tracks: [{ id, title, genre, ..., provider, lyrics, image_url, suno_id }] }
export function getMusicLibrary() {
  return apiGet('/api/music/library');
}

// POST /api/music/library  body: track object
// → saved track with id
export function saveMusicTrack(data) {
  return apiPost('/api/music/library', data);
}

// DELETE /api/music/library/:id
// → { ok: true }
export function deleteMusicTrack(id) {
  return apiDelete(`/api/music/library/${id}`);
}

// GET /api/music/models → { models: [{ id, name, max_duration, description }] }
export function getMusicModels() {
  return apiGet('/api/music/models');
}

// GET /api/music/credits → { remaining, total, ... }
export function getMusicCredits() {
  return apiGet('/api/music/credits');
}

// POST /api/music/extend  body: { suno_id, continue_at, prompt, style, title, model }
// → { task_id, provider }
export function extendMusicTrack(payload) {
  return apiPost('/api/music/extend', payload);
}

// POST /api/music/vocal-removal  body: { suno_id, title }
// → { task_id, provider }
export function removeVocals(payload) {
  return apiPost('/api/music/vocal-removal', payload);
}

// ── 저장된 가사 CRUD ─────────────────────────────────────────────────────────

// GET /api/music/lyrics/library → { lyrics: [{ id, title, text, prompt, created_at, updated_at }] }
export function getSavedLyrics() {
  return apiGet('/api/music/lyrics/library');
}

// POST /api/music/lyrics/library  body: { title, text, prompt }
export function saveLyrics(data) {
  return apiPost('/api/music/lyrics/library', data);
}

// PUT /api/music/lyrics/library/:id  body: { title?, text?, prompt? }
export function updateLyrics(id, data) {
  return apiPut(`/api/music/lyrics/library/${id}`, data);
}

// DELETE /api/music/lyrics/library/:id
export function deleteLyrics(id) {
  return apiDelete(`/api/music/lyrics/library/${id}`);
}

// ── Phase 1: 커버 이미지 ────────────────────────────────────────────────────

// POST /api/music/cover-image  body: { suno_task_id, track_id }
export function generateCoverImage(payload) {
  return apiPost('/api/music/cover-image', payload);
}

// ── Phase 2 API ─────────────────────────────────────────────────────────────

// POST /api/music/wav  body: { suno_task_id, suno_id, track_id }
export function convertToWav(payload) {
  return apiPost('/api/music/wav', payload);
}

// POST /api/music/stem-split  body: { suno_task_id, suno_id, track_id }
export function splitStems(payload) {
  return apiPost('/api/music/stem-split', payload);
}

// GET /api/music/timestamped-lyrics?task_id=...&suno_id=...
export function getTimestampedLyrics(taskId, sunoId) {
  return apiGet(`/api/music/timestamped-lyrics?task_id=${encodeURIComponent(taskId)}&suno_id=${encodeURIComponent(sunoId)}`);
}

// POST /api/music/style-boost  body: { content }
export function generateStyleBoost(content) {
  return apiPost('/api/music/style-boost', { content });
}

// ── Phase 3 API ─────────────────────────────────────────────────────────────

// POST /api/music/upload-cover
export function uploadAndCover(payload) {
  return apiPost('/api/music/upload-cover', payload);
}

// POST /api/music/upload-extend
export function uploadAndExtend(payload) {
  return apiPost('/api/music/upload-extend', payload);
}

// POST /api/music/add-vocals
export function addVocals(payload) {
  return apiPost('/api/music/add-vocals', payload);
}

// POST /api/music/add-instrumental
export function addInstrumental(payload) {
  return apiPost('/api/music/add-instrumental', payload);
}

// POST /api/music/video
export function generateVideo(payload) {
  return apiPost('/api/music/video', payload);
}

// ── 로또 고도화 API ────────────────────────────────────────────────────────────

// GET /api/lotto/stats/performance
export function getPerformanceStats() {
  return apiGet('/api/lotto/stats/performance');
}

// GET /api/lotto/report/latest
export function getLatestReport() {
  return apiGet('/api/lotto/report/latest');
}

// GET /api/lotto/report/:drw_no
export function getReport(drwNo) {
  return apiGet(`/api/lotto/report/${drwNo}`);
}

// GET /api/lotto/report/history?limit=N
export function getReportHistory(limit = 10) {
  return apiGet(`/api/lotto/report/history?limit=${limit}`);
}

// GET /api/lotto/analysis/personal
export function getPersonalAnalysis() {
  return apiGet('/api/lotto/analysis/personal');
}

// ── 종합 추론 추천 ──────────────────────────────────────────────────────────
// GET /api/lotto/recommend/combined
export function getCombinedRecommend() {
  return apiGet('/api/lotto/recommend/combined');
}

// GET /api/lotto/recommend/combined/history
export function getCombinedHistory(limit = 30) {
  return apiGet(`/api/lotto/recommend/combined/history?limit=${limit}`);
}

// GET /api/lotto/purchase?draw_no=N&days=N
export function getPurchases({ draw_no, days } = {}) {
  const qs = new URLSearchParams();
  if (draw_no) qs.set('draw_no', String(draw_no));
  if (days) qs.set('days', String(days));
  const q = qs.toString();
  return apiGet(`/api/lotto/purchase${q ? '?' + q : ''}`);
}

// GET /api/lotto/purchase/stats
export function getPurchaseStats() {
  return apiGet('/api/lotto/purchase/stats');
}

// POST /api/lotto/purchase
export function addPurchase(data) {
  return apiPost('/api/lotto/purchase', data);
}

// PUT /api/lotto/purchase/:id
export function updatePurchase(id, data) {
  return apiPut(`/api/lotto/purchase/${id}`, data);
}

// DELETE /api/lotto/purchase/:id
export function deletePurchase(id) {
  return apiDelete(`/api/lotto/purchase/${id}`);
}

// ── 블로그 API ────────────────────────────────────────────────────────────────
// GET  /api/blog/posts               → { posts: [{id, title, tags, body, date, excerpt}] }
// POST /api/blog/posts               → 새 글 생성
// PUT  /api/blog/posts/:id           → 글 수정
// DELETE /api/blog/posts/:id         → 글 삭제

export function getBlogPostsApi() {
  return apiGet('/api/blog/posts');
}

export function createBlogPost(data) {
  return apiPost('/api/blog/posts', data);
}

export function updateBlogPost(id, data) {
  return apiPut(`/api/blog/posts/${id}`, data);
}

export function deleteBlogPost(id) {
  return apiDelete(`/api/blog/posts/${id}`);
}

// ── 블로그 마케팅 API ────────────────────────────────────────────────────────

export function getBlogMarketingStatus() {
  return apiGet('/api/blog-marketing/status');
}

export function startResearch(keyword) {
  return apiPost('/api/blog-marketing/research', { keyword });
}

export function getResearchHistory(limit = 30) {
  return apiGet(`/api/blog-marketing/research/history?limit=${limit}`);
}

export function getResearchDetail(id) {
  return apiGet(`/api/blog-marketing/research/${id}`);
}

export function deleteResearch(id) {
  return apiDelete(`/api/blog-marketing/research/${id}`);
}

export function getBlogMarketingTask(taskId) {
  return apiGet(`/api/blog-marketing/task/${encodeURIComponent(taskId)}`);
}

export function startGenerate(keywordId) {
  return apiPost('/api/blog-marketing/generate', { keyword_id: keywordId });
}

export function startReview(postId) {
  return apiPost(`/api/blog-marketing/review/${postId}`);
}

export function startRegenerate(postId) {
  return apiPost(`/api/blog-marketing/regenerate/${postId}`);
}

export function getBlogMarketingPosts(status, limit = 50) {
  const qs = new URLSearchParams();
  if (status) qs.set('status', status);
  if (limit) qs.set('limit', String(limit));
  const q = qs.toString();
  return apiGet(`/api/blog-marketing/posts${q ? '?' + q : ''}`);
}

export function getBlogMarketingPost(id) {
  return apiGet(`/api/blog-marketing/posts/${id}`);
}

export function updateBlogMarketingPost(id, data) {
  return apiPut(`/api/blog-marketing/posts/${id}`, data);
}

export function deleteBlogMarketingPost(id) {
  return apiDelete(`/api/blog-marketing/posts/${id}`);
}

export function publishBlogMarketingPost(id, naverUrl) {
  return apiPost(`/api/blog-marketing/posts/${id}/publish`, { naver_url: naverUrl || '' });
}

export function getBlogMarketingCommissions(postId) {
  const qs = postId ? `?post_id=${postId}` : '';
  return apiGet(`/api/blog-marketing/commissions${qs}`);
}

export function addBlogMarketingCommission(data) {
  return apiPost('/api/blog-marketing/commissions', data);
}

export function updateBlogMarketingCommission(id, data) {
  return apiPut(`/api/blog-marketing/commissions/${id}`, data);
}

export function deleteBlogMarketingCommission(id) {
  return apiDelete(`/api/blog-marketing/commissions/${id}`);
}

export function getBlogMarketingDashboard() {
  return apiGet('/api/blog-marketing/dashboard');
}

// 마케터 단계
export function startMarket(postId) {
  return apiPost(`/api/blog-marketing/market/${postId}`);
}

// 브랜드커넥트 링크 CRUD
export function getBrandLinks(params = {}) {
  const qs = new URLSearchParams();
  if (params.post_id) qs.set('post_id', String(params.post_id));
  if (params.keyword_id) qs.set('keyword_id', String(params.keyword_id));
  const q = qs.toString();
  return apiGet(`/api/blog-marketing/links${q ? '?' + q : ''}`);
}

export function createBrandLink(data) {
  return apiPost('/api/blog-marketing/links', data);
}

export function updateBrandLink(id, data) {
  return apiPut(`/api/blog-marketing/links/${id}`, data);
}

export function deleteBrandLink(id) {
  return apiDelete(`/api/blog-marketing/links/${id}`);
}