#!/usr/bin/env node

const isMusl = () => {
  let musl = false;
  if (process.platform === "linux") {
    musl = isMuslFromFilesystem();
    if (musl === null) {
      musl = isMuslFromReport();
    }
    if (musl === null) {
      musl = isMuslFromChildProcess();
    }
  }
  return musl;
};

const isFileMusl = (f) => f.includes("libc.musl-") || f.includes("ld-musl-");

const isMuslFromFilesystem = () => {
  const { readFileSync } = require("fs");
  try {
    return readFileSync("/usr/bin/ldd", "utf-8").includes("musl");
  } catch {
    return null;
  }
};

const isMuslFromReport = () => {
  const report =
    typeof process.report.getReport === "function"
      ? process.report.getReport()
      : null;
  if (!report) {
    return null;
  }
  if (report.header && report.header.glibcVersionRuntime) {
    return false;
  }
  if (Array.isArray(report.sharedObjects)) {
    if (report.sharedObjects.some(isFileMusl)) {
      return true;
    }
  }
  return false;
};

const isMuslFromChildProcess = () => {
  try {
    return require("child_process")
      .execSync("ldd --version", { encoding: "utf8" })
      .includes("musl");
  } catch (e) {
    // If we reach this case, we don't know if the system is musl or not, so is better to just fallback to false
    return false;
  }
};

const { platform, arch, env, version, release } = process;

const PLATFORMS = {
  // win32: {
  //   x64: {
  //     musl: "@pactup/win32-x64/pactup.exe",
  //     gnu: "@pactup/win32-x64/pactup.exe",
  //   },
  //   arm64: {
  //     musl: "@pactup/win32-arm64/pactup.exe",
  //     gnu: "@pactup/win32-arm64/pactup.exe",
  //   },
  // },
  darwin: {
    x64: {
      musl: "@pactup/darwin-x64/pactup",
      gnu: "@pactup/darwin-x64/pactup",
    },
    arm64: {
      musl: "@pactup/darwin-arm64/pactup",
      gnu: "@pactup/darwin-arm64/pactup",
    },
  },
  linux: {
    x64: {
      musl: "@pactup/linux-x64-musl/pactup",
      gnu: "@pactup/linux-x64-gnu/pactup",
    },
    arm64: {
      musl: "@pactup/linux-arm64-musl/pactup",
      gnu: "@pactup/linux-arm64-gnu/pactup",
    },
  },
};

let binPath = PLATFORMS[platform]?.[arch]?.[isMusl() ? "musl" : "gnu"];

if (binPath) {
  const result = require("child_process").spawnSync(
    require.resolve(binPath),
    process.argv.slice(2),
    {
      shell: false,
      stdio: "inherit",
      env: {
        ...env,
        JS_RUNTIME_VERSION: version,
        JS_RUNTIME_NAME: release.name,
        NODE_PACKAGE_MANAGER: detectPackageManager(),
      },
    }
  );

  if (result.error) {
    throw result.error;
  }

  process.exitCode = result.status;
} else {
  let target = `${platform}-${arch}`;
  if (isMusl()) {
    target = `${target}-musl`;
  }
  console.error(
    `The pactup CLI package doesn't ship with prebuilt binaries for your platform (${target}) yet. ` +
      "You can create an issue at https://github.com/kadena-community/pactup/issues for support."
  );
  process.exitCode = 1;
}

/**
 * NPM, Yarn, and other package manager set the `npm_config_user_agent`. It has the following format:
 *
 * ```
 * "npm/8.3.0 node/v16.13.2 win32 x64 workspaces/false
 * ```
 *
 * @returns The package manager string (`npm/8.3.0`) or null if the user agent string isn't set.
 */
function detectPackageManager() {
  const userAgent = env.npm_config_user_agent;

  if (userAgent == null) {
    return null;
  }

  return userAgent.split(" ")[0];
}