/**
 * @file Express router for /api/projects: every lane grouped by the git repo
 * it belongs to, with that repo's worktrees (see server/lib/projects.js). Read
 * on demand by the sidebar's project tree, never polled; `POST /refresh` drops
 * the cached roots and worktree lists first. In server mode a member gets only
 * their own workspaces' projects.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

const { Router } = require("express");
const lanesLib = require("../lib/lanes");
const { listProjects, clearProjectCaches } = require("../lib/projects");
const { sameOriginGuard } = require("../lib/same-origin");
const scope = require("../lib/scope");

const router = Router();

/**
 * Server mode: a member's projects are built from their own workspaces only,
 * and a worktree another user's workspace sits on is left out of the list.
 */
async function projectsFor(req) {
  const all = lanesLib.listLanes();
  const visible = scope.visibleLaneIds(req);
  if (visible === null) return listProjects(all);
  const others = new Set(all.filter((l) => !visible.includes(l.id)).map((l) => l.cwd));
  const projects = await listProjects(all.filter((l) => visible.includes(l.id)));
  return projects.map((p) => ({ ...p, worktrees: p.worktrees.filter((w) => !others.has(w.path)) }));
}

router.get("/", async (req, res) => {
  res.json({ projects: await projectsFor(req) });
});

router.post("/refresh", sameOriginGuard, async (req, res) => {
  clearProjectCaches();
  res.json({ projects: await projectsFor(req) });
});

module.exports = router;