// Loaded from https://raw.githubusercontent.com/denjucks/dex/master/lib/deps/debug@4.1.1/src/node.dew.js


import _tty from "../../@jspm/core@1.1.0/nodelibs/tty.js";
import _util from "../../@jspm/core@1.1.0/nodelibs/util.js";
import { dew as _commonDewDew } from "./common.dew.js";
import _process from "../../@jspm/core@1.1.0/nodelibs/process.js";
var exports = {},
    _dewExec = false;

var _global = typeof globalThis !== "undefined" ? globalThis : typeof self !== "undefined" ? self : global;

export function dew() {
  if (_dewExec) return exports;
  _dewExec = true;


  var process = _process;

  /**
   * Module dependencies.
   */
  const tty = _tty;
  const util = _util;
  /**
   * This is the Node.js implementation of `debug()`.
   */

  exports.init = init;
  exports.log = log;
  exports.formatArgs = formatArgs;
  exports.save = save;
  exports.load = load;
  exports.useColors = useColors;
  /**
   * Colors.
   */

  exports.colors = [6, 2, 3, 4, 5, 1];

  try {
    // Optional dependency (as in, doesn't need to be installed, NOT like optionalDependencies in package.json)
    // eslint-disable-next-line import/no-extraneous-dependencies

  } catch (error) {} // Swallow - we only care if `supports-color` is available; it doesn't have to be.

  /**
   * Build up the default `inspectOpts` object from the environment variables.
   *
   *   $ DEBUG_COLORS=no DEBUG_DEPTH=10 DEBUG_SHOW_HIDDEN=enabled node script.js
   */


  exports.inspectOpts = Object.keys(process.env).filter(key => {
    return /^debug_/i.test(key);
  }).reduce((obj, key) => {
    // Camel-case
    const prop = key.substring(6).toLowerCase().replace(/_([a-z])/g, (_, k) => {
      return k.toUpperCase();
    }); // Coerce string value into JS value

    let val = process.env[key];

    if (/^(yes|on|true|enabled)$/i.test(val)) {
      val = true;
    } else if (/^(no|off|false|disabled)$/i.test(val)) {
      val = false;
    } else if (val === 'null') {
      val = null;
    } else {
      val = Number(val);
    }

    obj[prop] = val;
    return obj;
  }, {});
  /**
   * Is stdout a TTY? Colored output is enabled when `true`.
   */

  function useColors() {
    return 'colors' in exports.inspectOpts ? Boolean(exports.inspectOpts.colors) : tty.isatty(process.stderr.fd);
  }
  /**
   * Adds ANSI color escape codes if enabled.
   *
   * @api public
   */


  function formatArgs(args) {
    const {
      namespace: name,
      useColors
    } = this || _global;

    if (useColors) {
      const c = (this || _global).color;
      const colorCode = '\u001B[3' + (c < 8 ? c : '8;5;' + c);
      const prefix = `  ${colorCode};1m${name} \u001B[0m`;
      args[0] = prefix + args[0].split('\n').join('\n' + prefix);
      args.push(colorCode + 'm+' + exports.humanize((this || _global).diff) + '\u001B[0m');
    } else {
      args[0] = getDate() + name + ' ' + args[0];
    }
  }

  function getDate() {
    if (exports.inspectOpts.hideDate) {
      return '';
    }

    return new Date().toISOString() + ' ';
  }
  /**
   * Invokes `util.format()` with the specified arguments and writes to stderr.
   */


  function log(...args) {
    return process.stderr.write(util.format(...args) + '\n');
  }
  /**
   * Save `namespaces`.
   *
   * @param {String} namespaces
   * @api private
   */


  function save(namespaces) {
    if (namespaces) {
      process.env.DEBUG = namespaces;
    } else {
      // If you set a process.env field to null or undefined, it gets cast to the
      // string 'null' or 'undefined'. Just delete instead.
      delete process.env.DEBUG;
    }
  }
  /**
   * Load `namespaces`.
   *
   * @return {String} returns the previously persisted debug modes
   * @api private
   */


  function load() {
    return process.env.DEBUG;
  }
  /**
   * Init logic for `debug` instances.
   *
   * Create a new `inspectOpts` object in case `useColors` is set
   * differently for a particular `debug` instance.
   */


  function init(debug) {
    debug.inspectOpts = {};
    const keys = Object.keys(exports.inspectOpts);

    for (let i = 0; i < keys.length; i++) {
      debug.inspectOpts[keys[i]] = exports.inspectOpts[keys[i]];
    }
  }

  exports = _commonDewDew()(exports);
  const {
    formatters
  } = exports;
  /**
   * Map %o to `util.inspect()`, all on a single line.
   */

  formatters.o = function (v) {
    (this || _global).inspectOpts.colors = (this || _global).useColors;
    return util.inspect(v, (this || _global).inspectOpts).replace(/\s*\n\s*/g, ' ');
  };
  /**
   * Map %O to `util.inspect()`, allowing multiple lines if needed.
   */


  formatters.O = function (v) {
    (this || _global).inspectOpts.colors = (this || _global).useColors;
    return util.inspect(v, (this || _global).inspectOpts);
  };

  return exports;
}