/*
 * prepare-release.test.cjs — Test standalone (zero deps) pour scripts/prepare-release.cjs
 *
 * Contrat vérifié (issu du planner / critères d'acceptation) :
 *   - `node scripts/prepare-release.cjs <semver>` met à jour `version.json` (racine)
 *     ET `admin-web/package.json` (champ `version`) avec la valeur passée.
 *   - Sans argument        -> exit code != 0.
 *   - Version non-semver   -> exit code != 0.
 *   - semver simple (1.2.3) ou avec prerelease (1.2.3-beta.1) -> succès.
 *   - Les autres clés de `admin-web/package.json` (name, dependencies, scripts...)
 *     sont préservées (pas écrasées).
 *
 * Ce test s'exécute AVANT l'implémentation (le script n'existe pas encore).
 * Dans ce cas, chaque test échoue proprement avec "[FAIL] ... script not implemented yet",
 * ce qui confirme l'état rouge attendu (TDD spec-first).
 *
 * Usage :  node scripts/prepare-release.test.cjs
 * Exit  :  0 si tous les tests passent, 1 sinon.
 */

"use strict";

const assert = require("node:assert");
const fs = require("node:fs");
const path = require("node:path");
const { spawnSync } = require("node:child_process");

const ROOT = path.resolve(__dirname, "..");
const SCRIPT = path.join(ROOT, "scripts", "prepare-release.cjs");
const VERSION_JSON = path.join(ROOT, "version.json");
const ADMIN_PKG = path.join(ROOT, "admin-web", "package.json");

let passed = 0;
let failed = 0;

function ok(name) {
  console.log(`[PASS] ${name}`);
  passed++;
}
function ko(name, detail) {
  console.log(`[FAIL] ${name}${detail ? " — " + detail : ""}`);
  failed++;
}

/**
 * Exécute prepare-release.cjs via node et renvoie { status, stdout, stderr }.
 * Si le script n'existe pas, on simule un échec avec status null.
 */
function runScript(args) {
  if (!fs.existsSync(SCRIPT)) {
    return {
      status: null,
      stdout: "",
      stderr: "scripts/prepare-release.cjs not implemented yet",
      missing: true,
    };
  }
  const res = spawnSync(process.execPath, [SCRIPT, ...args], {
    cwd: ROOT,
    encoding: "utf8",
    timeout: 15000,
  });
  return {
    status: res.status,
    stdout: res.stdout ?? "",
    stderr: res.stderr ?? "",
    missing: false,
  };
}

/* ------------------------------------------------------------------ *
 * Backup / restore : on ne veut PAS polluer le working tree.
 * On backup les fichiers AVANT les tests d'écriture et on restore à la fin,
 * même si une assertion throw.
 * ------------------------------------------------------------------ */

const backup = {};

function backupFile(file) {
  if (fs.existsSync(file)) {
    backup[file] = { existed: true, content: fs.readFileSync(file) };
  } else {
    backup[file] = { existed: false };
  }
}

function restoreFile(file) {
  const b = backup[file];
  if (!b) return;
  if (b.existed) {
    fs.writeFileSync(file, b.content);
  } else if (fs.existsSync(file)) {
    fs.unlinkSync(file);
  }
}

function readJSON(file) {
  return JSON.parse(fs.readFileSync(file, "utf8"));
}

/* ------------------------------------------------------------------ *
 * TEST CASES
 * ------------------------------------------------------------------ */

// (a) succès semver simple
function test_simple_semver_updates_both_files() {
  const name = "simple semver (9.9.9) updates version.json + admin-web/package.json";
  const r = runScript(["9.9.9"]);
  if (r.missing) return ko(name, "script not implemented yet");
  try {
    assert.strictEqual(r.status, 0, `expected exit 0, got ${r.status} (stderr=${r.stderr.trim()})`);
    const v = readJSON(VERSION_JSON);
    assert.strictEqual(v.version, "9.9.9", `version.json.version=${v.version}`);
    const p = readJSON(ADMIN_PKG);
    assert.strictEqual(p.version, "9.9.9", `admin-web/package.json.version=${p.version}`);
    ok(name);
  } catch (e) {
    ko(name, e.message);
  }
}

// (b) succès prerelease
function test_prerelease_semver_accepted() {
  const name = "prerelease semver (1.2.3-beta.1) accepted";
  const r = runScript(["1.2.3-beta.1"]);
  if (r.missing) return ko(name, "script not implemented yet");
  try {
    assert.strictEqual(r.status, 0, `expected exit 0, got ${r.status} (stderr=${r.stderr.trim()})`);
    const v = readJSON(VERSION_JSON);
    assert.strictEqual(v.version, "1.2.3-beta.1", `version.json.version=${v.version}`);
    const p = readJSON(ADMIN_PKG);
    assert.strictEqual(p.version, "1.2.3-beta.1", `admin-web/package.json.version=${p.version}`);
    ok(name);
  } catch (e) {
    ko(name, e.message);
  }
}

// (c) échec sans arg
function test_no_arg_fails() {
  const name = "no argument -> exit != 0";
  const r = runScript([]);
  if (r.missing) return ko(name, "script not implemented yet");
  try {
    assert.notStrictEqual(r.status, 0, `expected non-zero exit, got ${r.status}`);
    ok(name);
  } catch (e) {
    ko(name, e.message);
  }
}

// (d) échec version invalide
function test_invalid_version_fails() {
  const name = "invalid version ('not-a-version') -> exit != 0";
  const r = runScript(["not-a-version"]);
  if (r.missing) return ko(name, "script not implemented yet");
  try {
    assert.notStrictEqual(r.status, 0, `expected non-zero exit, got ${r.status}`);
    // fichiers ne doivent pas avoir été modifiés avec une version invalide
    if (fs.existsSync(VERSION_JSON)) {
      const v = readJSON(VERSION_JSON);
      assert.notStrictEqual(v.version, "not-a-version", "version.json should not contain invalid version");
    }
    ok(name);
  } catch (e) {
    ko(name, e.message);
  }
}

// (e) préservation des autres clés du package.json
function test_preserves_other_keys() {
  const name = "other keys of admin-web/package.json preserved (name, scripts, dependencies)";
  const r = runScript(["7.7.7"]);
  if (r.missing) return ko(name, "script not implemented yet");
  try {
    assert.strictEqual(r.status, 0, `expected exit 0, got ${r.status}`);
    const p = readJSON(ADMIN_PKG);
    // Le package.json actuel contient name, scripts, dependencies, devDependencies.
    // On vérifie que ces clés sont toujours là et non vides.
    assert.ok(typeof p.name === "string" && p.name.length > 0, `name missing/empty: ${p.name}`);
    assert.ok(p.scripts && typeof p.scripts === "object", "scripts object missing");
    assert.ok(Object.keys(p.scripts).length > 0, "scripts object empty");
    assert.ok(p.dependencies && typeof p.dependencies === "object", "dependencies object missing");
    assert.ok(Object.keys(p.dependencies).length > 0, "dependencies object empty");
    // La version, elle, doit avoir été bumpée
    assert.strictEqual(p.version, "7.7.7", `version should be 7.7.7, got ${p.version}`);
    ok(name);
  } catch (e) {
    ko(name, e.message);
  }
}

/* ------------------------------------------------------------------ *
 * RUN
 * ------------------------------------------------------------------ */

function main() {
  console.log("# prepare-release.cjs — test suite (standalone, zero deps)");
  console.log(`# script: ${path.relative(ROOT, SCRIPT)}`);
  console.log(`# exists: ${fs.existsSync(SCRIPT)}`);
  console.log("");

  // Backup AVANT les tests d'écriture
  backupFile(VERSION_JSON);
  backupFile(ADMIN_PKG);

  let crashed = false;
  try {
    test_simple_semver_updates_both_files();
    test_prerelease_semver_accepted();
    test_no_arg_fails();
    test_invalid_version_fails();
    test_preserves_other_keys();
  } catch (e) {
    crashed = true;
    console.error("[ERROR] unexpected exception in test runner:", e);
  } finally {
    // Restore TOUJOURS
    restoreFile(VERSION_JSON);
    restoreFile(ADMIN_PKG);
  }

  console.log("");
  console.log(`# Summary: ${passed} passed, ${failed} failed${crashed ? " (+runner crash)" : ""}`);
  process.exit(failed === 0 && !crashed ? 0 : 1);
}

main();