const fs = require("fs");
const path = require("path");
const { execSync } = require("child_process");

const statePath = path.join(process.cwd(), ".cursor", "pipeline-state.json");

const REPO_IDS = new Set([
  "dnd_player",
  "project-converter",
  "DndGamePlayerLicenseServer",
  "none",
]);

function readState() {
  const defaults = {
    frontend_development: "pending",
    ui_autotests: "pending",
    code_review: "pending",
    ui_browser_verification: "pending",
    verify_repo: "dnd_player",
  };
  if (!fs.existsSync(statePath)) {
    return { ...defaults };
  }
  try {
    const parsed = JSON.parse(fs.readFileSync(statePath, "utf8"));
    const merged = { ...defaults, ...parsed };
    if (!REPO_IDS.has(merged.verify_repo)) merged.verify_repo = defaults.verify_repo;
    return merged;
  } catch {
    return { ...defaults };
  }
}

function fail(msg) {
  process.stdout.write(JSON.stringify({ followup_message: msg }));
  process.exit(0);
}

/** Родитель каталога `cursorAi` (воркспейс с `.cursor/`) — обычно `dnd_project`. */
function getSiblingRoot(cwd) {
  const fromEnv = process.env.DND_PROJECT_ROOT;
  if (fromEnv) {
    const r = path.resolve(fromEnv);
    if (fs.existsSync(r)) return r;
  }
  return path.resolve(cwd, "..");
}

function resolveRepoRoot(repoId, cwd) {
  const sibling = getSiblingRoot(cwd);
  const map = {
    dnd_player: path.join(sibling, "dnd_player"),
    "project-converter": path.join(sibling, "project-converter"),
    DndGamePlayerLicenseServer: path.join(sibling, "DndGamePlayerLicenseServer"),
  };
  if (repoId === "dnd_player" && process.env.DND_PLAYER_ROOT) {
    const r = path.resolve(process.env.DND_PLAYER_ROOT);
    if (fs.existsSync(path.join(r, "package.json"))) return r;
  }
  const root = map[repoId];
  if (root && fs.existsSync(path.join(root, "package.json"))) return root;
  if (root && fs.existsSync(root)) return root;
  return null;
}

function run(cmd, opts) {
  execSync(cmd, { stdio: "pipe", ...opts });
}

function verifyDndPlayer(root) {
  const opts = { cwd: root };
  run("npm run lint", opts);
  run("npm run typecheck", opts);
  run("npm run test", opts);
}

function verifyProjectConverter(root) {
  const opts = { cwd: root };
  const pkgPath = path.join(root, "package.json");
  let pkg;
  try {
    pkg = JSON.parse(fs.readFileSync(pkgPath, "utf8"));
  } catch {
    fail("project-converter: could not read package.json");
  }
  if (!pkg.scripts?.test) {
    fail(
      'project-converter: add a "test" script and tests in the same PR as behavior changes (policy A — see project.mdc)',
    );
  }
  try {
    run("npm run lint", opts);
  } catch {
    fail("project-converter: npm run lint failed");
  }
  const files = ["src/main.js", "src/renderer.js", "src/run-electron.mjs"];
  for (const f of files) {
    const p = path.join(root, f);
    if (fs.existsSync(p)) {
      try {
        run(`node --check "${p}"`, { cwd: root });
      } catch {
        fail(`project-converter: node --check failed for ${f}`);
      }
    }
  }
  try {
    run("npm run test", opts);
  } catch {
    fail("project-converter: npm run test failed");
  }
}

function verifyLicenseServer(root) {
  const opts = { cwd: root };
  const checks = [
    path.join(root, "src", "server.mjs"),
    path.join(root, "lib", "canonicalJson.mjs"),
  ];
  for (const p of checks) {
    if (!fs.existsSync(p)) continue;
    try {
      run(`node --check "${p}"`, opts);
    } catch {
      fail(`DndGamePlayerLicenseServer: node --check failed for ${path.relative(root, p)}`);
    }
  }
  const pkgPath = path.join(root, "package.json");
  let pkg;
  try {
    pkg = JSON.parse(fs.readFileSync(pkgPath, "utf8"));
  } catch {
    fail("DndGamePlayerLicenseServer: could not read package.json");
  }
  if (!pkg.scripts?.test) {
    fail(
      'DndGamePlayerLicenseServer: add a "test" script and tests in the same PR as behavior changes (policy A — see project.mdc)',
    );
  }
  try {
    run("npm run test", opts);
  } catch {
    fail("DndGamePlayerLicenseServer: npm run test failed");
  }
}

const cwd = process.cwd();
const state = readState();

const envRepo = process.env.VERIFY_REPO;
const verifyRepo =
  envRepo && REPO_IDS.has(envRepo) ? envRepo : state.verify_repo || "dnd_player";

if (!REPO_IDS.has(verifyRepo)) {
  fail(
    `Invalid verify_repo "${verifyRepo}". Use: dnd_player | project-converter | DndGamePlayerLicenseServer | none (override: env VERIFY_REPO)`,
  );
}

if (verifyRepo === "none") {
  process.exit(0);
}

if (state.frontend_development !== "done") {
  fail("Run frontend-developer stage (see .cursor/agents/frontend-developer.md)");
}

if (state.ui_autotests !== "done") {
  fail("Run ui-test-developer stage (see .cursor/agents/ui-test-developer.md)");
}

if (state.code_review !== "done") {
  fail("Run code-reviewer stage (see .cursor/agents/code-reviewer.md)");
}

if (state.ui_browser_verification !== "done") {
  fail(
    "Run ui-tester stage — UI or API verification (see .cursor/agents/ui-tester.md)",
  );
}

const root = resolveRepoRoot(verifyRepo, cwd);
if (!root) {
  fail(
    `Cannot resolve repo root for verify_repo="${verifyRepo}" (sibling of workspace parent, see WORKSPACE.md; override: DND_PROJECT_ROOT, DND_PLAYER_ROOT for dnd_player)`,
  );
}

try {
  if (verifyRepo === "dnd_player") {
    verifyDndPlayer(root);
  } else if (verifyRepo === "project-converter") {
    verifyProjectConverter(root);
  } else if (verifyRepo === "DndGamePlayerLicenseServer") {
    verifyLicenseServer(root);
  }
} catch (e) {
  const msg = e && typeof e === "object" && "message" in e ? e.message : String(e);
  fail(`Verify failed (${verifyRepo}): ${msg}`);
}

process.exit(0);