import { readFile } from "node:fs/promises";
import { resolve } from "node:path";
import { fileURLToPath } from "node:url";

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

const allowedChannels = new Set(["dev", "main", "release", "local"]);
const fullShaPattern = /^[0-9a-f]{40}$/i;
const semverTag = `v${packageInfo.version}`;

const env = process.env;
const channel = env.VITE_BUILD_CHANNEL || "local";
const commit = env.VITE_BUILD_COMMIT || "local";
const isCi = env.CI === "true" || env.GITHUB_ACTIONS === "true";
const isTagBuild = env.GITHUB_REF_TYPE === "tag";
const isReleaseBuild = env.RELEASE_BUILD === "true" || isTagBuild || channel === "release";

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

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

assert(allowedChannels.has(channel), `VITE_BUILD_CHANNEL must be one of ${[...allowedChannels].join(", ")}.`);

if (isCi || isReleaseBuild) {
  assert(channel !== "local", "CI and release builds must inject VITE_BUILD_CHANNEL.");
  assert(fullShaPattern.test(commit), "CI and release builds must inject a full 40-character VITE_BUILD_COMMIT.");
}

if (env.GITHUB_SHA) {
  assert(
    commit === env.GITHUB_SHA || commit === "local",
    "VITE_BUILD_COMMIT must match GITHUB_SHA when GitHub Actions provides a source commit.",
  );
}

if (isTagBuild) {
  assert(env.GITHUB_REF_NAME === semverTag, `Release tag must be ${semverTag}; found ${env.GITHUB_REF_NAME || "<missing>"}.`);
  assert(channel === "release", "Release tag builds must set VITE_BUILD_CHANNEL=release.");
}

if (env.REQUIRE_DESKTOP_SIGNING === "true") {
  assert(process.platform === "darwin", "Signed macOS desktop release builds must run on macOS.");
  requireEnv("TAURI_SIGNING_PRIVATE_KEY");
  requireEnv("TAURI_SIGNING_PRIVATE_KEY_PASSWORD");
  requireEnv("APPLE_ID");
  requireEnv("APPLE_PASSWORD");
  requireEnv("APPLE_TEAM_ID");
  assert(
    Boolean(env.APPLE_CERTIFICATE || env.APPLE_SIGNING_IDENTITY),
    "APPLE_CERTIFICATE or APPLE_SIGNING_IDENTITY must be configured for macOS signing.",
  );
}

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