import { execFileSync } from "node:child_process";
import { readFile } from "node:fs/promises";
import { resolve } from "node:path";
import { fileURLToPath } from "node:url";
import { loadDesktopReleasePolicy, resolveDesktopReleasePolicy } from "./desktop-release-policy.mjs";

const frontendDir = fileURLToPath(new URL("../", import.meta.url));
const rootDir = resolve(frontendDir, "..");
const packageInfo = JSON.parse(await readFile(resolve(frontendDir, "package.json"), "utf8"));
const desktopReleasePolicy = await loadDesktopReleasePolicy();
const desktopReleaseResolution = resolveDesktopReleasePolicy(packageInfo.version, desktopReleasePolicy);
const failures = [];

const env = process.env;
const fullShaPattern = /^[0-9a-f]{40}$/i;
const expectedTag = `v${packageInfo.version}`;
const requiresMacosSigning = env.REQUIRE_DESKTOP_SIGNING === "true";
const requiresWindowsSigning = env.REQUIRE_WINDOWS_SIGNING === "true";
const requiresUpdaterSigning = env.REQUIRE_UPDATER_SIGNING === "true";
const allowsUnsignedPlatformRelease = env.ALLOW_UNSIGNED_PLATFORM_RELEASE === "true";
const desktopPlatformSigningMode = env.DESKTOP_PLATFORM_SIGNING_MODE;
const desktopReleasePlatform = env.DESKTOP_RELEASE_PLATFORM;
const requiredUpdaterEnv = ["TAURI_SIGNING_PRIVATE_KEY", "TAURI_SIGNING_PRIVATE_KEY_PASSWORD"];
const requiredMacosEnv = ["APPLE_ID", "APPLE_PASSWORD", "APPLE_TEAM_ID"];
const requiredWindowsEnv = ["WINDOWS_CERTIFICATE", "WINDOWS_CERTIFICATE_PASSWORD"];

const fail = (message) => failures.push(message);
const assert = (condition, message) => {
  if (!condition) fail(message);
};

const git = (args) =>
  execFileSync("git", args, {
    cwd: rootDir,
    encoding: "utf8",
    stdio: ["ignore", "pipe", "ignore"],
  }).trim();

const gitMaybe = (args) => {
  try {
    return git(args);
  } catch {
    return undefined;
  }
};

const requireEnv = (name) => {
  assert(Boolean(env[name]), `${name} must be configured for desktop release readiness.`);
};

const validateBaseUrl = () => {
  const raw = env.DESKTOP_UPDATE_BASE_URL;
  requireEnv("DESKTOP_UPDATE_BASE_URL");
  if (!raw) return;

  let url;
  try {
    url = new URL(raw.endsWith("/") ? raw : `${raw}/`);
  } catch (error) {
    fail(`DESKTOP_UPDATE_BASE_URL is invalid: ${error.message}`);
    return;
  }

  assert(url.protocol === "https:", "DESKTOP_UPDATE_BASE_URL must use HTTPS.");
  assert(url.username === "" && url.password === "", "DESKTOP_UPDATE_BASE_URL must not include credentials.");
  assert(!/[?&]token=/i.test(url.search), "DESKTOP_UPDATE_BASE_URL must not include token query parameters.");
  assert(
    url.pathname.includes(packageInfo.version),
    `DESKTOP_UPDATE_BASE_URL must include the immutable version segment ${packageInfo.version}.`,
  );
};

const validateWindowsTimestampUrl = () => {
  const raw = env.WINDOWS_TIMESTAMP_URL;
  requireEnv("WINDOWS_TIMESTAMP_URL");
  if (!raw) return;

  let url;
  try {
    url = new URL(raw);
  } catch (error) {
    fail(`WINDOWS_TIMESTAMP_URL is invalid: ${error.message}`);
    return;
  }

  assert(["http:", "https:"].includes(url.protocol), "WINDOWS_TIMESTAMP_URL must use HTTP or HTTPS.");
  assert(url.username === "" && url.password === "", "WINDOWS_TIMESTAMP_URL must not include credentials.");
  assert(!/[?&]token=/i.test(url.search), "WINDOWS_TIMESTAMP_URL must not include token query parameters.");
};

const headSha = gitMaybe(["rev-parse", "HEAD"]);
const exactTag = gitMaybe(["describe", "--tags", "--exact-match", "HEAD"]);
const status = gitMaybe(["status", "--porcelain"]);

assert(Boolean(headSha), "Current Git commit cannot be resolved.");
assert(exactTag === expectedTag, `Current commit must be exactly tagged ${expectedTag}; found ${exactTag || "<none>"}.`);
assert(status === "", "Release readiness requires a clean working tree.");

assert(env.VITE_BUILD_CHANNEL === "release", "VITE_BUILD_CHANNEL must be release.");
assert(fullShaPattern.test(env.VITE_BUILD_COMMIT || ""), "VITE_BUILD_COMMIT must be the full release commit SHA.");
if (headSha && env.VITE_BUILD_COMMIT) {
  assert(env.VITE_BUILD_COMMIT === headSha, "VITE_BUILD_COMMIT must match the current release commit.");
}

assert(
  !(requiresMacosSigning && requiresWindowsSigning),
  "macOS and Windows signing readiness must be checked in their native jobs.",
);
assert(
  desktopReleasePlatform === "macos" || desktopReleasePlatform === "windows",
  "DESKTOP_RELEASE_PLATFORM must be macos or windows.",
);
assert(
  desktopPlatformSigningMode === desktopReleaseResolution.platformSigningMode,
  `DESKTOP_PLATFORM_SIGNING_MODE must be ${desktopReleaseResolution.platformSigningMode} for v${packageInfo.version}.`,
);
assert(
  desktopReleasePolicy.updaterSigningRequired === true && requiresUpdaterSigning,
  "Release readiness requires REQUIRE_UPDATER_SIGNING=true; updater signing cannot be disabled.",
);

for (const name of requiredUpdaterEnv) {
  requireEnv(name);
}

if (desktopPlatformSigningMode === "signed") {
  assert(!allowsUnsignedPlatformRelease, "Signed releases must not enable ALLOW_UNSIGNED_PLATFORM_RELEASE.");
  assert(
    (desktopReleasePlatform === "macos" && requiresMacosSigning && !requiresWindowsSigning) ||
      (desktopReleasePlatform === "windows" && requiresWindowsSigning && !requiresMacosSigning),
    "Signed readiness must enable only the matching native platform signing requirement.",
  );
}

if (desktopPlatformSigningMode === "unsigned-exception") {
  assert(
    desktopReleaseResolution.platformSigningMode === "unsigned-exception",
    `v${packageInfo.version} has no approved unsigned platform release exception.`,
  );
  assert(allowsUnsignedPlatformRelease, "The approved exception requires ALLOW_UNSIGNED_PLATFORM_RELEASE=true.");
  assert(
    !requiresMacosSigning && !requiresWindowsSigning,
    "Unsigned platform readiness must not claim Apple or Windows platform signing.",
  );
  if (desktopReleasePlatform === "macos") {
    assert(process.platform === "darwin", "The macOS ad-hoc readiness check must run on macOS.");
  }
  if (desktopReleasePlatform === "windows") {
    assert(process.platform === "win32", "The unsigned Windows readiness check must run on Windows.");
  }
}

if (requiresMacosSigning) {
  assert(process.platform === "darwin", "Signed macOS desktop release readiness must run on macOS.");
  for (const name of requiredMacosEnv) {
    requireEnv(name);
  }
  assert(
    Boolean(env.APPLE_CERTIFICATE || env.APPLE_SIGNING_IDENTITY),
    "APPLE_CERTIFICATE or APPLE_SIGNING_IDENTITY must be configured for macOS signing.",
  );
  if (env.APPLE_CERTIFICATE) {
    requireEnv("APPLE_CERTIFICATE_PASSWORD");
  }
}

if (requiresWindowsSigning) {
  assert(process.platform === "win32", "Signed Windows desktop release readiness must run on Windows.");
  for (const name of requiredWindowsEnv) {
    requireEnv(name);
  }
  validateWindowsTimestampUrl();
}

validateBaseUrl();

if (failures.length > 0) {
  console.error(`Desktop release readiness check failed:\n${failures.map((item) => `  - ${item}`).join("\n")}`);
  process.exitCode = 1;
} else {
  console.log("Desktop release readiness check passed.");
}