import express from "express";
import session from "express-session";
import cookieParser from "cookie-parser";
import { fileURLToPath } from "url";
import path from "path";
import { config } from "./config.js";
import { siteGroups } from "./sites.js";
import { initOidc, loginRedirect, handleCallback, requireAuth, oidcReady } from "./auth.js";
import * as db from "./db.js";

const __dirname = path.dirname(fileURLToPath(import.meta.url));
const app = express();

app.set("view engine", "ejs");
app.set("views", path.join(__dirname, "..", "views"));
app.use(express.urlencoded({ extended: true }));
app.use(express.json());
app.use(cookieParser());
app.use("/public", express.static(path.join(__dirname, "..", "public")));
app.use(
  session({
    secret: config.sessionSecret,
    resave: false,
    saveUninitialized: false,
    cookie: { httpOnly: true, sameSite: "lax", maxAge: 8 * 3600 * 1000 },
  })
);

// 모든 뷰에 공통 노출
app.use((req, res, next) => {
  res.locals.brand = config.brand;
  res.locals.user = req.session.user || null;
  next();
});

app.get("/healthz", (_req, res) => res.json({ ok: true }));

// --- 인증 ---
// SSO 세션이 없으면 중간 페이지 없이 바로 Keycloak(커스텀 테마) 로그인으로 보낸다.
// (OIDC 초기화 실패 등으로 로그인 불가하면 안내용 login.ejs 로 폴백)
app.get("/login", (req, res) => {
  if (req.session.user) return res.redirect("/");
  if (req.query.error) return res.render("login", { error: req.query.error });
  // OIDC 준비됐으면 중간 화면 없이 곧장 Keycloak 로그인 폼으로
  if (oidcReady()) return loginRedirect(req, res);
  return res.render("login", { error: "로그인 서비스를 사용할 수 없습니다. 잠시 후 다시 시도해 주세요." });
});
app.get("/auth/login", (req, res) => loginRedirect(req, res));
app.get("/auth/callback", async (req, res) => {
  try {
    const u = await handleCallback(req);
    await db.upsertUser(u);
    req.session.user = u;
    res.redirect("/");
  } catch (e) {
    console.error("oidc callback error", e);
    res.status(500).render("login", { error: "로그인 처리 중 오류가 발생했습니다." });
  }
});
app.get("/logout", (req, res) => {
  req.session.destroy(() => res.redirect("/login"));
});

// --- 대시보드 (로그인 필요) ---
app.get("/", requireAuth, async (req, res) => {
  const projects = await db.listProjects();
  res.render("dashboard", { siteGroups, projects });
});

// --- 프로젝트 ---
app.post("/projects", requireAuth, async (req, res) => {
  const { title, description, repo_url, app_url, tags } = req.body;
  if (!title || !title.trim()) return res.redirect("/");
  await db.addProject({
    owner: req.session.user.sabun,
    title: title.trim(),
    description,
    repoUrl: repo_url,
    appUrl: app_url,
    tags,
  });
  res.redirect("/");
});

app.get("/projects/:id", requireAuth, async (req, res) => {
  const project = await db.getProject(req.params.id);
  if (!project) return res.status(404).send("not found");
  const comments = await db.listComments(project.id);
  const starred = await db.isStarred({ projectId: project.id, sabun: req.session.user.sabun });
  res.render("project", { project, comments, starred });
});

app.post("/projects/:id/comments", requireAuth, async (req, res) => {
  if (req.body.body && req.body.body.trim()) {
    await db.addComment({
      projectId: req.params.id,
      author: req.session.user.sabun,
      body: req.body.body.trim(),
    });
  }
  res.redirect(`/projects/${req.params.id}`);
});

app.post("/projects/:id/star", requireAuth, async (req, res) => {
  await db.toggleStar({ projectId: req.params.id, sabun: req.session.user.sabun });
  res.redirect(`/projects/${req.params.id}`);
});

// --- 부팅 ---
const start = async () => {
  try {
    await initOidc();
    console.log("OIDC discovery 완료:", config.oidc.issuer);
  } catch (e) {
    console.error("OIDC 초기화 실패(로그인 비활성):", e.message);
  }
  app.listen(config.port, "0.0.0.0", () =>
    console.log(`${config.brand} portal listening on :${config.port}`)
  );
};
start();