'use strict';

var errors = require('../../_virtual/errors.js');

var hasRequiredErrors;

function requireErrors () {
	if (hasRequiredErrors) return errors.__exports;
	hasRequiredErrors = 1;

	const codes = {};

	function createErrorType(code, message, Base) {
	  if (!Base) {
	    Base = Error;
	  }

	  function getMessage (arg1, arg2, arg3) {
	    if (typeof message === 'string') {
	      return message
	    } else {
	      return message(arg1, arg2, arg3)
	    }
	  }

	  class NodeError extends Base {
	    constructor (arg1, arg2, arg3) {
	      super(getMessage(arg1, arg2, arg3));
	    }
	  }

	  NodeError.prototype.name = Base.name;
	  NodeError.prototype.code = code;

	  codes[code] = NodeError;
	}

	// https://github.com/nodejs/node/blob/v10.8.0/lib/internal/errors.js
	function oneOf(expected, thing) {
	  if (Array.isArray(expected)) {
	    const len = expected.length;
	    expected = expected.map((i) => String(i));
	    if (len > 2) {
	      return `one of ${thing} ${expected.slice(0, len - 1).join(', ')}, or ` +
	             expected[len - 1];
	    } else if (len === 2) {
	      return `one of ${thing} ${expected[0]} or ${expected[1]}`;
	    } else {
	      return `of ${thing} ${expected[0]}`;
	    }
	  } else {
	    return `of ${thing} ${String(expected)}`;
	  }
	}

	// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith
	function startsWith(str, search, pos) {
		return str.substr(0 , search.length) === search;
	}

	// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith
	function endsWith(str, search, this_len) {
		if (this_len === undefined || this_len > str.length) {
			this_len = str.length;
		}
		return str.substring(this_len - search.length, this_len) === search;
	}

	// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/includes
	function includes(str, search, start) {
	  if (typeof start !== 'number') {
	    start = 0;
	  }

	  if (start + search.length > str.length) {
	    return false;
	  } else {
	    return str.indexOf(search, start) !== -1;
	  }
	}

	createErrorType('ERR_INVALID_OPT_VALUE', function (name, value) {
	  return 'The value "' + value + '" is invalid for option "' + name + '"'
	}, TypeError);
	createErrorType('ERR_INVALID_ARG_TYPE', function (name, expected, actual) {
	  // determiner: 'must be' or 'must not be'
	  let determiner;
	  if (typeof expected === 'string' && startsWith(expected, 'not ')) {
	    determiner = 'must not be';
	    expected = expected.replace(/^not /, '');
	  } else {
	    determiner = 'must be';
	  }

	  let msg;
	  if (endsWith(name, ' argument')) {
	    // For cases like 'first argument'
	    msg = `The ${name} ${determiner} ${oneOf(expected, 'type')}`;
	  } else {
	    const type = includes(name, '.') ? 'property' : 'argument';
	    msg = `The "${name}" ${type} ${determiner} ${oneOf(expected, 'type')}`;
	  }

	  msg += `. Received type ${typeof actual}`;
	  return msg;
	}, TypeError);
	createErrorType('ERR_STREAM_PUSH_AFTER_EOF', 'stream.push() after EOF');
	createErrorType('ERR_METHOD_NOT_IMPLEMENTED', function (name) {
	  return 'The ' + name + ' method is not implemented'
	});
	createErrorType('ERR_STREAM_PREMATURE_CLOSE', 'Premature close');
	createErrorType('ERR_STREAM_DESTROYED', function (name) {
	  return 'Cannot call ' + name + ' after a stream was destroyed';
	});
	createErrorType('ERR_MULTIPLE_CALLBACK', 'Callback called multiple times');
	createErrorType('ERR_STREAM_CANNOT_PIPE', 'Cannot pipe, not readable');
	createErrorType('ERR_STREAM_WRITE_AFTER_END', 'write after end');
	createErrorType('ERR_STREAM_NULL_VALUES', 'May not write null values to stream', TypeError);
	createErrorType('ERR_UNKNOWN_ENCODING', function (arg) {
	  return 'Unknown encoding: ' + arg
	}, TypeError);
	createErrorType('ERR_STREAM_UNSHIFT_AFTER_END_EVENT', 'stream.unshift() after end event');

	errors.__exports.codes = codes;
	return errors.__exports;
}

exports.__require = requireErrors;
