'use strict';

module.exports = exports = testbinary;

exports.usage = 'Tests that the binary.node can be required';

const path = require('path');
const log = require('npmlog');
const cp = require('child_process');
const versioning = require('./util/versioning.js');
const napi = require('./util/napi.js');

function testbinary(gyp, argv, callback) {
  const args = [];
  const options = {};
  let shell_cmd = process.execPath;
  const package_json = gyp.package_json;
  const napi_build_version = napi.get_napi_build_version_from_command_args(argv);
  const opts = versioning.evaluate(package_json, gyp.opts, napi_build_version);
  // skip validation for runtimes we don't explicitly support (like electron)
  if (opts.runtime &&
        opts.runtime !== 'node-webkit' &&
        opts.runtime !== 'node') {
    return callback();
  }
  const nw = (opts.runtime && opts.runtime === 'node-webkit');
  // ensure on windows that / are used for require path
  const binary_module = opts.module.replace(/\\/g, '/');
  if ((process.arch !== opts.target_arch) ||
        (process.platform !== opts.target_platform)) {
    let msg = 'skipping validation since host platform/arch (';
    msg += process.platform + '/' + process.arch + ')';
    msg += ' does not match target (';
    msg += opts.target_platform + '/' + opts.target_arch + ')';
    log.info('validate', msg);
    return callback();
  }
  if (nw) {
    options.timeout = 5000;
    if (process.platform === 'darwin') {
      shell_cmd = 'node-webkit';
    } else if (process.platform === 'win32') {
      shell_cmd = 'nw.exe';
    } else {
      shell_cmd = 'nw';
    }
    const modulePath = path.resolve(binary_module);
    const appDir = path.join(__dirname, 'util', 'nw-pre-gyp');
    args.push(appDir);
    args.push(modulePath);
    log.info('validate', "Running test command: '" + shell_cmd + ' ' + args.join(' ') + "'");
    cp.execFile(shell_cmd, args, options, (err, stdout, stderr) => {
      // check for normal timeout for node-webkit
      if (err) {
        if (err.killed === true && err.signal && err.signal.indexOf('SIG') > -1) {
          return callback();
        }
        const stderrLog = stderr.toString();
        log.info('stderr', stderrLog);
        if (/^\s*Xlib:\s*extension\s*"RANDR"\s*missing\s*on\s*display\s*":\d+\.\d+"\.\s*$/.test(stderrLog)) {
          log.info('RANDR', 'stderr contains only RANDR error, ignored');
          return callback();
        }
        return callback(err);
      }
      return callback();
    });
    return;
  }
  args.push('--eval');
  args.push("require('" + binary_module.replace(/'/g, '\'') + "')");
  log.info('validate', "Running test command: '" + shell_cmd + ' ' + args.join(' ') + "'");
  cp.execFile(shell_cmd, args, options, (err, stdout, stderr) => {
    if (err) {
      return callback(err, { stdout: stdout, stderr: stderr });
    }
    return callback();
  });
}