import { statSync, existsSync, readFileSync } from 'fs';
import { basename, extname, dirname, sep, resolve, join } from 'path';
import { makeLegalIdentifier, attachScopes, extractAssignedNames, createFilter } from '@rollup/pluginutils';
import getCommonDir from 'commondir';
import glob from 'glob';
import { walk } from 'estree-walker';
import MagicString from 'magic-string';
import { sync } from 'resolve';
import isReference from 'is-reference';

function _slicedToArray(arr, i) {
  return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest();
}

function _arrayWithHoles(arr) {
  if (Array.isArray(arr)) return arr;
}

function _iterableToArrayLimit(arr, i) {
  if (typeof Symbol === "undefined" || !(Symbol.iterator in Object(arr))) return;
  var _arr = [];
  var _n = true;
  var _d = false;
  var _e = undefined;

  try {
    for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
      _arr.push(_s.value);

      if (i && _arr.length === i) break;
    }
  } catch (err) {
    _d = true;
    _e = err;
  } finally {
    try {
      if (!_n && _i["return"] != null) _i["return"]();
    } finally {
      if (_d) throw _e;
    }
  }

  return _arr;
}

function _unsupportedIterableToArray(o, minLen) {
  if (!o) return;
  if (typeof o === "string") return _arrayLikeToArray(o, minLen);
  var n = Object.prototype.toString.call(o).slice(8, -1);
  if (n === "Object" && o.constructor) n = o.constructor.name;
  if (n === "Map" || n === "Set") return Array.from(n);
  if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);
}

function _arrayLikeToArray(arr, len) {
  if (len == null || len > arr.length) len = arr.length;

  for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];

  return arr2;
}

function _nonIterableRest() {
  throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
}

function _createForOfIteratorHelper(o) {
  if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) {
    if (Array.isArray(o) || (o = _unsupportedIterableToArray(o))) {
      var i = 0;

      var F = function () {};

      return {
        s: F,
        n: function () {
          if (i >= o.length) return {
            done: true
          };
          return {
            done: false,
            value: o[i++]
          };
        },
        e: function (e) {
          throw e;
        },
        f: F
      };
    }

    throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
  }

  var it,
      normalCompletion = true,
      didErr = false,
      err;
  return {
    s: function () {
      it = o[Symbol.iterator]();
    },
    n: function () {
      var step = it.next();
      normalCompletion = step.done;
      return step;
    },
    e: function (e) {
      didErr = true;
      err = e;
    },
    f: function () {
      try {
        if (!normalCompletion && it.return != null) it.return();
      } finally {
        if (didErr) throw err;
      }
    }
  };
}

var peerDependencies = {
	rollup: "^2.3.4"
};

/* eslint-disable no-undefined */
const operators = {
  '==': x => equals(x.left, x.right, false),
  '!=': x => not(operators['=='](x)),
  '===': x => equals(x.left, x.right, true),
  '!==': x => not(operators['==='](x)),
  '!': x => isFalsy(x.argument),
  '&&': x => isTruthy(x.left) && isTruthy(x.right),
  '||': x => isTruthy(x.left) || isTruthy(x.right)
};
function flatten(node) {
  const parts = [];

  while (node.type === 'MemberExpression') {
    if (node.computed) return null;
    parts.unshift(node.property.name); // eslint-disable-next-line no-param-reassign

    node = node.object;
  }

  if (node.type !== 'Identifier') return null;
  const _node = node,
        name = _node.name;
  parts.unshift(name);
  return {
    name,
    keypath: parts.join('.')
  };
}

function isTruthy(node) {
  if (node.type === 'Literal') return !!node.value;
  if (node.type === 'ParenthesizedExpression') return isTruthy(node.expression);
  if (node.operator in operators) return operators[node.operator](node);
  return undefined;
}
function isFalsy(node) {
  return not(isTruthy(node));
}

function not(value) {
  return value === undefined ? value : !value;
}

function equals(a, b, strict) {
  if (a.type !== b.type) return undefined; // eslint-disable-next-line eqeqeq

  if (a.type === 'Literal') return strict ? a.value === b.value : a.value == b.value;
  return undefined;
}

const PROXY_SUFFIX = '?commonjs-proxy';
const getProxyId = id => `\0${id}${PROXY_SUFFIX}`;
const getIdFromProxyId = proxyId => proxyId.slice(1, -PROXY_SUFFIX.length);
const EXTERNAL_SUFFIX = '?commonjs-external';
const getExternalProxyId = id => `\0${id}${EXTERNAL_SUFFIX}`;
const getIdFromExternalProxyId = proxyId => proxyId.slice(1, -EXTERNAL_SUFFIX.length);
const VIRTUAL_PATH_BASE = '/$$rollup_base$$';
const getVirtualPathForDynamicRequirePath = (path, commonDir) => {
  if (path.startsWith(commonDir)) return VIRTUAL_PATH_BASE + path.slice(commonDir.length);
  return path;
};
const DYNAMIC_REGISTER_PREFIX = '\0commonjs-dynamic-register:';
const DYNAMIC_JSON_PREFIX = '\0commonjs-dynamic-json:';
const DYNAMIC_PACKAGES_ID = '\0commonjs-dynamic-packages';
const HELPERS_ID = '\0commonjsHelpers.js'; // `x['default']` is used instead of `x.default` for backward compatibility with ES3 browsers.
// Minifiers like uglify will usually transpile it back if compatibility with ES3 is not enabled.

const HELPERS = `
export var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};

export function unwrapExports (x) {
	return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
}

export function createCommonjsModule(fn, basedir, module) {
	return module = {
	  path: basedir,
	  exports: {},
	  require: function (path, base) {
      return commonjsRequire(path, (base === undefined || base === null) ? module.path : base);
    }
	}, fn(module, module.exports), module.exports;
}

export function getCjsExportFromNamespace (n) {
	return n && n['default'] || n;
}
`;
const HELPER_NON_DYNAMIC = `
export function commonjsRequire () {
	throw new Error('Dynamic requires are not currently supported by @rollup/plugin-commonjs');
}
`;
const HELPERS_DYNAMIC = `
export function commonjsRegister (path, loader) {
	DYNAMIC_REQUIRE_LOADERS[path] = loader;
}

const DYNAMIC_REQUIRE_LOADERS = Object.create(null);
const DYNAMIC_REQUIRE_CACHE = Object.create(null);
const DEFAULT_PARENT_MODULE = {
	id: '<' + 'rollup>', exports: {}, parent: undefined, filename: null, loaded: false, children: [], paths: []
};
const CHECKED_EXTENSIONS = ['', '.js', '.json'];

function normalize (path) {
	path = path.replace(/\\\\/g, '/');
	const parts = path.split('/');
	const slashed = parts[0] === '';
	for (let i = 1; i < parts.length; i++) {
		if (parts[i] === '.' || parts[i] === '') {
			parts.splice(i--, 1);
		}
	}
	for (let i = 1; i < parts.length; i++) {
		if (parts[i] !== '..') continue;
		if (i > 0 && parts[i - 1] !== '..' && parts[i - 1] !== '.') {
			parts.splice(--i, 2);
			i--;
		}
	}
	path = parts.join('/');
	if (slashed && path[0] !== '/')
	  path = '/' + path;
	else if (path.length === 0)
	  path = '.';
	return path;
}

function join () {
	if (arguments.length === 0)
	  return '.';
	let joined;
	for (let i = 0; i < arguments.length; ++i) {
	  let arg = arguments[i];
	  if (arg.length > 0) {
		if (joined === undefined)
		  joined = arg;
		else
		  joined += '/' + arg;
	  }
	}
	if (joined === undefined)
	  return '.';

	return joined;
}

function isPossibleNodeModulesPath (modulePath) {
	let c0 = modulePath[0];
	if (c0 === '/' || c0 === '\\\\') return false;
	let c1 = modulePath[1], c2 = modulePath[2];
	if ((c0 === '.' && (!c1 || c1 === '/' || c1 === '\\\\')) ||
		(c0 === '.' && c1 === '.' && (!c2 || c2 === '/' || c2 === '\\\\'))) return false;
	if (c1 === ':' && (c2 === '/' || c2 === '\\\\'))
		return false;
	return true;
}

function dirname (path) {
  if (path.length === 0)
    return '.';

  let i = path.length - 1;
  while (i > 0) {
    const c = path.charCodeAt(i);
    if ((c === 47 || c === 92) && i !== path.length - 1)
      break;
    i--;
  }

  if (i > 0)
    return path.substr(0, i);

  if (path.chartCodeAt(0) === 47 || path.chartCodeAt(0) === 92)
    return path.charAt(0);

  return '.';
}

export function commonjsRequire (path, originalModuleDir) {
	const shouldTryNodeModules = isPossibleNodeModulesPath(path);
	path = normalize(path);
	let relPath;
	while (true) {
		if (!shouldTryNodeModules) {
			relPath = originalModuleDir ? normalize(originalModuleDir + '/' + path) : path;
		} else if (originalModuleDir) {
			relPath = normalize(originalModuleDir + '/node_modules/' + path);
		} else {
			relPath = normalize(join('node_modules', path));
		}
		for (let extensionIndex = 0; extensionIndex < CHECKED_EXTENSIONS.length; extensionIndex++) {
			const resolvedPath = relPath + CHECKED_EXTENSIONS[extensionIndex];
			let cachedModule = DYNAMIC_REQUIRE_CACHE[resolvedPath];
			if (cachedModule) return cachedModule.exports;
			const loader = DYNAMIC_REQUIRE_LOADERS[resolvedPath];
			if (loader) {
				DYNAMIC_REQUIRE_CACHE[resolvedPath] = cachedModule = {
					id: resolvedPath,
					filename: resolvedPath,
					path: dirname(resolvedPath),
					exports: {},
					parent: DEFAULT_PARENT_MODULE,
					loaded: false,
					children: [],
					paths: [],
					require: function (path, base) {
					  return commonjsRequire(path, (base === undefined || base === null) ? cachedModule.path : base);
					}
				};
				try {
					loader.call(commonjsGlobal, cachedModule, cachedModule.exports);
				} catch (error) {
					delete DYNAMIC_REQUIRE_CACHE[resolvedPath];
					throw error;
				}
				cachedModule.loaded = true;
				return cachedModule.exports;
			};
		}
		if (!shouldTryNodeModules) break;
		const nextDir = normalize(originalModuleDir + '/..');
		if (nextDir === originalModuleDir) break;
		originalModuleDir = nextDir;
	}
	return require(path);
}

commonjsRequire.cache = DYNAMIC_REQUIRE_CACHE;
`;

/* eslint-disable import/prefer-default-export */
function getName(id) {
  const name = makeLegalIdentifier(basename(id, extname(id)));

  if (name !== 'index') {
    return name;
  }

  const segments = dirname(id).split(sep);
  return makeLegalIdentifier(segments[segments.length - 1]);
}

const reserved = 'process location abstract arguments boolean break byte case catch char class const continue debugger default delete do double else enum eval export extends false final finally float for from function goto if implements import in instanceof int interface let long native new null package private protected public return short static super switch synchronized this throw throws transient true try typeof var void volatile while with yield'.split(' ');
const blacklist = {
  __esModule: true
};
reserved.forEach(word => blacklist[word] = true);
const exportsPattern = /^(?:module\.)?exports(?:\.([a-zA-Z_$][a-zA-Z_$0-9]*))?$/;
const firstpassGlobal = /\b(?:require|module|exports|global)\b/;
const firstpassNoGlobal = /\b(?:require|module|exports)\b/;
const importExportDeclaration = /^(?:Import|Export(?:Named|Default))Declaration/;
const functionType = /^(?:FunctionDeclaration|FunctionExpression|ArrowFunctionExpression)$/;

function deconflict(scope, globals, identifier) {
  let i = 1;
  let deconflicted = makeLegalIdentifier(identifier);

  while (scope.contains(deconflicted) || globals.has(deconflicted) || deconflicted in blacklist) {
    deconflicted = `${identifier}_${i}`;
    i += 1;
  }

  scope.declarations[deconflicted] = true;
  return deconflicted;
}

function tryParse(parse, code, id) {
  try {
    return parse(code, {
      allowReturnOutsideFunction: true
    });
  } catch (err) {
    err.message += ` in ${id}`;
    throw err;
  }
}

function normalizePathSlashes(path) {
  return path.replace(/\\/g, '/');
}
function hasCjsKeywords(code, ignoreGlobal) {
  const firstpass = ignoreGlobal ? firstpassNoGlobal : firstpassGlobal;
  return firstpass.test(code);
}
function checkEsModule(parse, code, id) {
  const ast = tryParse(parse, code, id);
  let isEsModule = false;

  var _iterator = _createForOfIteratorHelper(ast.body),
      _step;

  try {
    for (_iterator.s(); !(_step = _iterator.n()).done;) {
      const node = _step.value;
      if (node.type === 'ExportDefaultDeclaration') return {
        isEsModule: true,
        hasDefaultExport: true,
        ast
      };

      if (node.type === 'ExportNamedDeclaration') {
        isEsModule = true;

        var _iterator2 = _createForOfIteratorHelper(node.specifiers),
            _step2;

        try {
          for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
            const specifier = _step2.value;

            if (specifier.exported.name === 'default') {
              return {
                isEsModule: true,
                hasDefaultExport: true,
                ast
              };
            }
          }
        } catch (err) {
          _iterator2.e(err);
        } finally {
          _iterator2.f();
        }
      } else if (importExportDeclaration.test(node.type)) isEsModule = true;
    }
  } catch (err) {
    _iterator.e(err);
  } finally {
    _iterator.f();
  }

  return {
    isEsModule,
    hasDefaultExport: false,
    ast
  };
}

function getDefinePropertyCallName(node, targetName) {
  if (node.type !== 'CallExpression') return;
  const _node$callee = node.callee,
        object = _node$callee.object,
        property = _node$callee.property;
  if (!object || object.type !== 'Identifier' || object.name !== 'Object') return;
  if (!property || property.type !== 'Identifier' || property.name !== 'defineProperty') return;
  if (node.arguments.length !== 3) return;

  const _node$arguments = _slicedToArray(node.arguments, 2),
        target = _node$arguments[0],
        val = _node$arguments[1];

  if (target.type !== 'Identifier' || target.name !== targetName) return; // eslint-disable-next-line consistent-return

  return val.value;
}

function transformCommonjs(parse, code, id, isEntry, isEsModule, ignoreGlobal, ignoreRequire, sourceMap, isDynamicRequireModulesEnabled, dynamicRequireModuleSet, commonDir, astCache) {
  const ast = astCache || tryParse(parse, code, id);
  const magicString = new MagicString(code);
  const required = {}; // Because objects have no guaranteed ordering, yet we need it,
  // we need to keep track of the order in a array

  const sources = [];
  let uid = 0;
  let scope = attachScopes(ast, 'scope');
  const uses = {
    module: false,
    exports: false,
    global: false,
    require: false
  };
  let lexicalDepth = 0;
  let programDepth = 0;
  const globals = new Set(); // TODO technically wrong since globals isn't populated yet, but ¯\_(ツ)_/¯

  const HELPERS_NAME = deconflict(scope, globals, 'commonjsHelpers');
  const namedExports = {}; // TODO handle transpiled modules

  let shouldWrap = /__esModule/.test(code);
  let usesCommonjsHelpers = false;

  function isRequireStatement(node) {
    if (!node) return false;
    if (node.type !== 'CallExpression') return false; // Weird case of `require()` or `module.require()` without arguments

    if (node.arguments.length === 0) return false;
    return isRequireIdentifier(node.callee);
  }

  function isRequireIdentifier(node) {
    if (!node) return false;

    if (node.type === 'Identifier' && node.name === 'require'
    /* `require` */
    ) {
        // `require` is hidden by a variable in local scope
        if (scope.contains('require')) return false;
        return true;
      } else if (node.type === 'MemberExpression'
    /* `[something].[something]` */
    ) {
        // `module.[something]`
        if (node.object.type !== 'Identifier' || node.object.name !== 'module') return false; // `module` is hidden by a variable in local scope

        if (scope.contains('module')) return false; // `module.require(...)`

        if (node.property.type !== 'Identifier' || node.property.name !== 'require') return false;
        return true;
      }

    return false;
  }

  function hasDynamicArguments(node) {
    return node.arguments.length > 1 || node.arguments[0].type !== 'Literal' && (node.arguments[0].type !== 'TemplateLiteral' || node.arguments[0].expressions.length > 0);
  }

  function isStaticRequireStatement(node) {
    if (!isRequireStatement(node)) return false;
    if (hasDynamicArguments(node)) return false;
    return true;
  }

  function isIgnoredRequireStatement(requiredNode) {
    return ignoreRequire(requiredNode.arguments[0].value);
  }

  function getRequireStringArg(node) {
    return node.arguments[0].type === 'Literal' ? node.arguments[0].value : node.arguments[0].quasis[0].value.cooked;
  }

  function getRequired(node, name) {
    let sourceId = getRequireStringArg(node);
    const isDynamicRegister = sourceId.startsWith(DYNAMIC_REGISTER_PREFIX);

    if (isDynamicRegister) {
      sourceId = sourceId.substr(DYNAMIC_REGISTER_PREFIX.length);
    }

    const existing = required[sourceId]; // eslint-disable-next-line no-undefined

    if (existing === undefined) {
      const isDynamic = hasDynamicModuleForPath(sourceId);

      if (!name) {
        do {
          name = `require$$${uid}`;
          uid += 1;
        } while (scope.contains(name));
      }

      if (isDynamicRegister && sourceId.endsWith('.json')) {
        sourceId = DYNAMIC_JSON_PREFIX + sourceId;
      }

      if (isDynamicRegister || !isDynamic || sourceId.endsWith('.json')) {
        sources.push([sourceId, !isDynamicRegister]);
      }

      required[sourceId] = {
        source: sourceId,
        name,
        importsDefault: false,
        isDynamic
      };
    }

    return required[sourceId];
  }

  function hasDynamicModuleForPath(source) {
    if (!/[/\\]/.test(source)) {
      try {
        const resolvedPath = normalizePathSlashes(sync(source, {
          basedir: dirname(id)
        }));

        if (dynamicRequireModuleSet.has(resolvedPath)) {
          return true;
        }
      } catch (ex) {
        // Probably a node.js internal module
        return false;
      }

      return false;
    }

    for (var _i = 0, _arr = ['', '.js', '.json']; _i < _arr.length; _i++) {
      const attemptExt = _arr[_i];
      const resolvedPath = normalizePathSlashes(resolve(dirname(id), source + attemptExt));

      if (dynamicRequireModuleSet.has(resolvedPath)) {
        return true;
      }
    }

    return false;
  }

  function shouldUseSimulatedRequire(required) {
    return hasDynamicModuleForPath(required.source) && ( // We only do `commonjsRequire` for json if it's the `commonjsRegister` call.
    required.source.startsWith(DYNAMIC_REGISTER_PREFIX) || !required.source.endsWith('.json'));
  } // do a first pass, see which names are assigned to. This is necessary to prevent
  // illegally replacing `var foo = require('foo')` with `import foo from 'foo'`,
  // where `foo` is later reassigned. (This happens in the wild. CommonJS, sigh)


  const assignedTo = new Set();
  walk(ast, {
    enter(node) {
      if (node.type !== 'AssignmentExpression') return;
      if (node.left.type === 'MemberExpression') return;
      extractAssignedNames(node.left).forEach(name => {
        assignedTo.add(name);
      });
    }

  });
  walk(ast, {
    enter(node, parent) {
      if (sourceMap) {
        magicString.addSourcemapLocation(node.start);
        magicString.addSourcemapLocation(node.end);
      } // skip dead branches


      if (parent && (parent.type === 'IfStatement' || parent.type === 'ConditionalExpression')) {
        if (node === parent.consequent && isFalsy(parent.test)) {
          this.skip();
          return;
        }

        if (node === parent.alternate && isTruthy(parent.test)) {
          this.skip();
          return;
        }
      }

      if (node._skip) {
        this.skip();
        return;
      }

      programDepth += 1;

      if (node.scope) {
        scope = node.scope;
      }

      if (functionType.test(node.type)) lexicalDepth += 1; // if toplevel return, we need to wrap it

      if (node.type === 'ReturnStatement' && lexicalDepth === 0) {
        shouldWrap = true;
      } // rewrite `this` as `commonjsHelpers.commonjsGlobal`


      if (node.type === 'ThisExpression' && lexicalDepth === 0) {
        uses.global = true;

        if (!ignoreGlobal) {
          magicString.overwrite(node.start, node.end, `${HELPERS_NAME}.commonjsGlobal`, {
            storeName: true
          });
          usesCommonjsHelpers = true;
        }

        return;
      } // rewrite `typeof module`, `typeof module.exports` and `typeof exports` (https://github.com/rollup/rollup-plugin-commonjs/issues/151)


      if (node.type === 'UnaryExpression' && node.operator === 'typeof') {
        const flattened = flatten(node.argument);
        if (!flattened) return;
        if (scope.contains(flattened.name)) return;

        if (flattened.keypath === 'module.exports' || flattened.keypath === 'module' || flattened.keypath === 'exports') {
          magicString.overwrite(node.start, node.end, `'object'`, {
            storeName: false
          });
        }
      } // rewrite `require` (if not already handled) `global` and `define`, and handle free references to
      // `module` and `exports` as these mean we need to wrap the module in commonjsHelpers.createCommonjsModule


      if (node.type === 'Identifier') {
        if (isReference(node, parent) && !scope.contains(node.name)) {
          if (node.name in uses) {
            if (isRequireIdentifier(node)) {
              if (!isDynamicRequireModulesEnabled && isStaticRequireStatement(parent)) {
                return;
              }

              if (isDynamicRequireModulesEnabled && isRequireStatement(parent)) {
                magicString.appendLeft(parent.end - 1, `,${JSON.stringify(dirname(id) === '.' ? null
                /* default behavior */
                : getVirtualPathForDynamicRequirePath(normalizePathSlashes(dirname(id)), commonDir))}`);
              }

              magicString.overwrite(node.start, node.end, `${HELPERS_NAME}.commonjsRequire`, {
                storeName: true
              });
              usesCommonjsHelpers = true;
            }

            uses[node.name] = true;

            if (node.name === 'global' && !ignoreGlobal) {
              magicString.overwrite(node.start, node.end, `${HELPERS_NAME}.commonjsGlobal`, {
                storeName: true
              });
              usesCommonjsHelpers = true;
            } // if module or exports are used outside the context of an assignment
            // expression, we need to wrap the module


            if (node.name === 'module' || node.name === 'exports') {
              shouldWrap = true;
            }
          }

          if (node.name === 'define') {
            magicString.overwrite(node.start, node.end, 'undefined', {
              storeName: true
            });
          }

          globals.add(node.name);
        }

        return;
      } // Is this an assignment to exports or module.exports?


      if (node.type === 'AssignmentExpression') {
        if (node.left.type !== 'MemberExpression') return;
        const flattened = flatten(node.left);
        if (!flattened) return;
        if (scope.contains(flattened.name)) return;
        const match = exportsPattern.exec(flattened.keypath);
        if (!match || flattened.keypath === 'exports') return;
        uses[flattened.name] = true; // we're dealing with `module.exports = ...` or `[module.]exports.foo = ...` –
        // if this isn't top-level, we'll need to wrap the module

        if (programDepth > 3) shouldWrap = true;
        node.left._skip = true;

        if (flattened.keypath === 'module.exports' && node.right.type === 'ObjectExpression') {
          node.right.properties.forEach(prop => {
            if (prop.computed || !('key' in prop) || prop.key.type !== 'Identifier') return;
            const name = prop.key.name;
            if (name === makeLegalIdentifier(name)) namedExports[name] = true;
          });
          return;
        }

        if (match[1]) namedExports[match[1]] = true;
        return;
      }

      const name = getDefinePropertyCallName(node, 'exports');
      if (name && name === makeLegalIdentifier(name)) namedExports[name] = true; // if this is `var x = require('x')`, we can do `import x from 'x'`

      if (node.type === 'VariableDeclarator' && node.id.type === 'Identifier' && isStaticRequireStatement(node.init) && !isIgnoredRequireStatement(node.init)) {
        // for now, only do this for top-level requires. maybe fix this in future
        if (scope.parent) return; // edge case — CJS allows you to assign to imports. ES doesn't

        if (assignedTo.has(node.id.name)) return;
        const required = getRequired(node.init, node.id.name);
        required.importsDefault = true;

        if (required.name === node.id.name && !required.isDynamic) {
          node._shouldRemove = true;
        }
      }

      if (!isStaticRequireStatement(node) || isIgnoredRequireStatement(node)) {
        return;
      }

      const required = getRequired(node);

      if (parent.type === 'ExpressionStatement') {
        // is a bare import, e.g. `require('foo');`
        magicString.remove(parent.start, parent.end);
      } else {
        required.importsDefault = true;

        if (shouldUseSimulatedRequire(required)) {
          magicString.overwrite(node.start, node.end, `${HELPERS_NAME}.commonjsRequire(${JSON.stringify(getVirtualPathForDynamicRequirePath(normalizePathSlashes(required.source), commonDir))}, ${JSON.stringify(dirname(id) === '.' ? null
          /* default behavior */
          : getVirtualPathForDynamicRequirePath(normalizePathSlashes(dirname(id)), commonDir))})`);
          usesCommonjsHelpers = true;
        } else {
          magicString.overwrite(node.start, node.end, required.name);
        }
      }

      node.callee._skip = true;
    },

    leave(node) {
      programDepth -= 1;
      if (node.scope) scope = scope.parent;
      if (functionType.test(node.type)) lexicalDepth -= 1;

      if (node.type === 'VariableDeclaration') {
        let keepDeclaration = false;
        let c = node.declarations[0].start;

        for (let i = 0; i < node.declarations.length; i += 1) {
          const declarator = node.declarations[i];

          if (declarator._shouldRemove) {
            magicString.remove(c, declarator.end);
          } else {
            if (!keepDeclaration) {
              magicString.remove(c, declarator.start);
              keepDeclaration = true;
            }

            c = declarator.end;
          }
        }

        if (!keepDeclaration) {
          magicString.remove(node.start, node.end);
        }
      }
    }

  });

  if (!sources.length && !uses.module && !uses.exports && !uses.require && (ignoreGlobal || !uses.global)) {
    if (Object.keys(namedExports).length) {
      throw new Error(`Custom named exports were specified for ${id} but it does not appear to be a CommonJS module`);
    } // not a CommonJS module


    return null;
  } // If `isEsModule` is on, it means it has ES6 import/export statements,
  //   which just can't be wrapped in a function.


  if (isEsModule) shouldWrap = false;
  usesCommonjsHelpers = usesCommonjsHelpers || shouldWrap;
  const importBlock = `${(usesCommonjsHelpers ? [`import * as ${HELPERS_NAME} from '${HELPERS_ID}';`] : []).concat(sources.map(([source]) => // import the actual module before the proxy, so that we know
  // what kind of proxy to build
  `import '${source}';`), sources.filter(([, importProxy]) => importProxy).map(([source]) => {
    const _required$source = required[source],
          name = _required$source.name,
          importsDefault = _required$source.importsDefault;
    return `import ${importsDefault ? `${name} from ` : ``}'${getProxyId(source)}';`;
  })).join('\n')}\n\n`;
  const namedExportDeclarations = [];
  let wrapperStart = '';
  let wrapperEnd = '';
  const moduleName = deconflict(scope, globals, getName(id));

  if (!isEntry && !isEsModule) {
    const exportModuleExports = {
      str: `export { ${moduleName} as __moduleExports };`,
      name: '__moduleExports'
    };
    namedExportDeclarations.push(exportModuleExports);
  }

  const name = getName(id);

  function addExport(x) {
    const deconflicted = deconflict(scope, globals, name);
    const declaration = deconflicted === name ? `export var ${x} = ${moduleName}.${x};` : `var ${deconflicted} = ${moduleName}.${x};\nexport { ${deconflicted} as ${x} };`;
    namedExportDeclarations.push({
      str: declaration,
      name: x
    });
  }

  const defaultExportPropertyAssignments = [];
  let hasDefaultExport = false;

  if (shouldWrap) {
    const args = `module${uses.exports ? ', exports' : ''}`;
    wrapperStart = `var ${moduleName} = ${HELPERS_NAME}.createCommonjsModule(function (${args}) {\n`;
    wrapperEnd = `\n}`;

    if (isDynamicRequireModulesEnabled) {
      wrapperEnd += `, ${JSON.stringify(getVirtualPathForDynamicRequirePath(normalizePathSlashes(dirname(id)), commonDir))}`;
    }

    wrapperEnd += `);`;
  } else {
    const names = [];

    var _iterator3 = _createForOfIteratorHelper(ast.body),
        _step3;

    try {
      for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
        const node = _step3.value;

        if (node.type === 'ExpressionStatement' && node.expression.type === 'AssignmentExpression') {
          const left = node.expression.left;
          const flattened = flatten(left);

          if (!flattened) {
            continue;
          }

          const match = exportsPattern.exec(flattened.keypath);

          if (!match) {
            continue;
          }

          if (flattened.keypath === 'module.exports') {
            hasDefaultExport = true;
            magicString.overwrite(left.start, left.end, `var ${moduleName}`);
          } else {
            const _match = _slicedToArray(match, 2),
                  name = _match[1];

            const deconflicted = deconflict(scope, globals, name);
            names.push({
              name,
              deconflicted
            });
            magicString.overwrite(node.start, left.end, `var ${deconflicted}`);
            const declaration = name === deconflicted ? `export { ${name} };` : `export { ${deconflicted} as ${name} };`;

            if (name !== 'default') {
              namedExportDeclarations.push({
                str: declaration,
                name
              });
              delete namedExports[name];
            }

            defaultExportPropertyAssignments.push(`${moduleName}.${name} = ${deconflicted};`);
          }
        }
      }
    } catch (err) {
      _iterator3.e(err);
    } finally {
      _iterator3.f();
    }

    if (!hasDefaultExport && (names.length || !isEntry && !isEsModule)) {
      wrapperEnd = `\n\nvar ${moduleName} = {\n${names.map(({
        name,
        deconflicted
      }) => `\t${name}: ${deconflicted}`).join(',\n')}\n};`;
    }
  }

  Object.keys(namedExports).filter(key => !blacklist[key]).forEach(addExport);
  const defaultExport = /__esModule/.test(code) ? `export default ${HELPERS_NAME}.unwrapExports(${moduleName});` : `export default ${moduleName};`;
  const named = namedExportDeclarations.filter(x => x.name !== 'default' || !hasDefaultExport).map(x => x.str);
  const exportBlock = `\n\n${(isEsModule ? [] : [defaultExport]).concat(named).concat(hasDefaultExport ? defaultExportPropertyAssignments : []).join('\n')}`;
  magicString.trim().prepend(importBlock + wrapperStart).trim().append(wrapperEnd);
  const injectExportBlock = hasDefaultExport || named.length > 0 || shouldWrap || !isEntry;

  if (injectExportBlock) {
    magicString.append(exportBlock);
  }

  code = magicString.toString();
  const map = sourceMap ? magicString.generateMap() : null;
  return {
    code,
    map,
    syntheticNamedExports: injectExportBlock
  };
}

function getDynamicRequirePaths(patterns) {
  const dynamicRequireModuleSet = new Set();

  var _iterator = _createForOfIteratorHelper(!patterns || Array.isArray(patterns) ? patterns || [] : [patterns]),
      _step;

  try {
    for (_iterator.s(); !(_step = _iterator.n()).done;) {
      const pattern = _step.value;
      const isNegated = pattern.startsWith('!');
      const modifySet = Set.prototype[isNegated ? 'delete' : 'add'].bind(dynamicRequireModuleSet);

      var _iterator2 = _createForOfIteratorHelper(glob.sync(isNegated ? pattern.substr(1) : pattern)),
          _step2;

      try {
        for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
          const path = _step2.value;
          modifySet(normalizePathSlashes(resolve(path)));
        }
      } catch (err) {
        _iterator2.e(err);
      } finally {
        _iterator2.f();
      }
    }
  } catch (err) {
    _iterator.e(err);
  } finally {
    _iterator.f();
  }

  const dynamicRequireModuleDirPaths = Array.from(dynamicRequireModuleSet.values()).filter(path => {
    try {
      if (statSync(path).isDirectory()) return true;
    } catch (ignored) {// Nothing to do here
    }

    return false;
  });
  return {
    dynamicRequireModuleSet,
    dynamicRequireModuleDirPaths
  };
}

/* eslint-disable no-undefined */
const isCjsPromises = new Map();
function getIsCjsPromise(id) {
  let isCjsPromise = isCjsPromises.get(id);
  if (isCjsPromise) return isCjsPromise.promise;
  const promise = new Promise(resolve => {
    isCjsPromise = {
      resolve,
      promise: undefined
    };
    isCjsPromises.set(id, isCjsPromise);
  });
  isCjsPromise.promise = promise;
  return promise;
}
function setIsCjsPromise(id, resolution) {
  const isCjsPromise = isCjsPromises.get(id);

  if (isCjsPromise) {
    if (isCjsPromise.resolve) {
      isCjsPromise.resolve(resolution);
      isCjsPromise.resolve = undefined;
    }
  } else {
    isCjsPromises.set(id, {
      promise: Promise.resolve(resolution),
      resolve: undefined
    });
  }
}

/* eslint-disable no-param-reassign, no-undefined */

function getCandidatesForExtension(resolved, extension) {
  return [resolved + extension, `${resolved}${sep}index${extension}`];
}

function getCandidates(resolved, extensions) {
  return extensions.reduce((paths, extension) => paths.concat(getCandidatesForExtension(resolved, extension)), [resolved]);
}

function getResolveId(extensions) {
  function resolveExtensions(importee, importer) {
    // not our problem
    if (importee[0] !== '.' || !importer) return undefined;
    const resolved = resolve(dirname(importer), importee);
    const candidates = getCandidates(resolved, extensions);

    for (let i = 0; i < candidates.length; i += 1) {
      try {
        const stats = statSync(candidates[i]);
        if (stats.isFile()) return {
          id: candidates[i]
        };
      } catch (err) {
        /* noop */
      }
    }

    return undefined;
  }

  function resolveId(importee, importer) {
    const isProxyModule = importee.endsWith(PROXY_SUFFIX);

    if (isProxyModule) {
      importee = getIdFromProxyId(importee);
    } else if (importee.startsWith('\0')) {
      if (importee === HELPERS_ID || importee === DYNAMIC_PACKAGES_ID || importee.startsWith(DYNAMIC_JSON_PREFIX)) {
        return importee;
      }

      return null;
    }

    if (importee.startsWith(DYNAMIC_JSON_PREFIX)) {
      return importee;
    }

    if (importer && importer.endsWith(PROXY_SUFFIX)) {
      importer = getIdFromProxyId(importer);
    }

    return this.resolve(importee, importer, {
      skipSelf: true
    }).then(resolved => {
      if (!resolved) {
        resolved = resolveExtensions(importee, importer);
      }

      if (isProxyModule) {
        if (!resolved) {
          return {
            id: getExternalProxyId(importee),
            external: false
          };
        }

        resolved.id = (resolved.external ? getExternalProxyId : getProxyId)(resolved.id);
        resolved.external = false;
        return resolved;
      }

      return resolved;
    });
  }

  return resolveId;
}

function commonjs(options = {}) {
  const extensions = options.extensions || ['.js'];
  const filter = createFilter(options.include, options.exclude);
  const ignoreGlobal = options.ignoreGlobal;

  const _getDynamicRequirePat = getDynamicRequirePaths(options.dynamicRequireTargets),
        dynamicRequireModuleSet = _getDynamicRequirePat.dynamicRequireModuleSet,
        dynamicRequireModuleDirPaths = _getDynamicRequirePat.dynamicRequireModuleDirPaths;

  const isDynamicRequireModulesEnabled = dynamicRequireModuleSet.size > 0;
  const commonDir = isDynamicRequireModulesEnabled ? getCommonDir(null, Array.from(dynamicRequireModuleSet).concat(process.cwd())) : null;
  const esModulesWithoutDefaultExport = new Set();
  const esModulesWithDefaultExport = new Set();
  const ignoreRequire = typeof options.ignore === 'function' ? options.ignore : Array.isArray(options.ignore) ? id => options.ignore.includes(id) : () => false;
  const resolveId = getResolveId(extensions);
  const sourceMap = options.sourceMap !== false;

  function transformAndCheckExports(code, id) {
    const _checkEsModule = checkEsModule(this.parse, code, id),
          isEsModule = _checkEsModule.isEsModule,
          hasDefaultExport = _checkEsModule.hasDefaultExport,
          ast = _checkEsModule.ast;

    const isDynamicRequireModule = dynamicRequireModuleSet.has(normalizePathSlashes(id));

    if (isEsModule && (!isDynamicRequireModule || !options.transformMixedEsModules)) {
      (hasDefaultExport ? esModulesWithDefaultExport : esModulesWithoutDefaultExport).add(id);

      if (!options.transformMixedEsModules) {
        setIsCjsPromise(id, false);
        return null;
      }
    } // it is not an ES module AND it does not have CJS-specific elements.
    else if (!hasCjsKeywords(code, ignoreGlobal)) {
        esModulesWithoutDefaultExport.add(id);
        setIsCjsPromise(id, false);
        return null;
      }

    const transformed = transformCommonjs(this.parse, code, id, this.getModuleInfo(id).isEntry, isEsModule, ignoreGlobal || isEsModule, ignoreRequire, sourceMap, isDynamicRequireModulesEnabled, dynamicRequireModuleSet, commonDir, ast);
    setIsCjsPromise(id, isEsModule ? false : Boolean(transformed));

    if (!transformed) {
      if (!isEsModule || isDynamicRequireModule) esModulesWithoutDefaultExport.add(id);
      return null;
    }

    return transformed;
  }

  return {
    name: 'commonjs',

    buildStart() {
      if (options.namedExports != null) {
        this.warn('The namedExports option from "@rollup/plugin-commonjs" is deprecated. Named exports are now handled automatically.');
      }

      const _this$meta$rollupVers = this.meta.rollupVersion.split('.').map(Number),
            _this$meta$rollupVers2 = _slicedToArray(_this$meta$rollupVers, 2),
            major = _this$meta$rollupVers2[0],
            minor = _this$meta$rollupVers2[1];

      const minVersion = peerDependencies.rollup.slice(2);

      const _minVersion$split$map = minVersion.split('.').map(Number),
            _minVersion$split$map2 = _slicedToArray(_minVersion$split$map, 2),
            minMajor = _minVersion$split$map2[0],
            minMinor = _minVersion$split$map2[1];

      if (major < minMajor || major === minMajor && minor < minMinor) {
        this.error(`Insufficient Rollup version: "@rollup/plugin-commonjs" requires at least rollup@${minVersion} but found rollup@${this.meta.rollupVersion}.`);
      }
    },

    resolveId,

    load(id) {
      if (id === HELPERS_ID) {
        let code = HELPERS; // Do not bloat everyone's code with the module manager code

        if (isDynamicRequireModulesEnabled) code += HELPERS_DYNAMIC;else code += HELPER_NON_DYNAMIC;
        return code;
      } // generate proxy modules


      if (id.endsWith(EXTERNAL_SUFFIX)) {
        const actualId = getIdFromExternalProxyId(id);
        const name = getName(actualId);
        if (actualId === HELPERS_ID || actualId === DYNAMIC_PACKAGES_ID) // These do not export default
          return `import * as ${name} from ${JSON.stringify(actualId)}; export default ${name};`;
        return `import ${name} from ${JSON.stringify(actualId)}; export default ${name};`;
      }

      if (id === DYNAMIC_PACKAGES_ID) {
        let code = `const { commonjsRegister } = require('${HELPERS_ID}');`;

        var _iterator = _createForOfIteratorHelper(dynamicRequireModuleDirPaths),
            _step;

        try {
          for (_iterator.s(); !(_step = _iterator.n()).done;) {
            const dir = _step.value;
            let entryPoint = 'index.js';

            try {
              if (existsSync(join(dir, 'package.json'))) {
                entryPoint = JSON.parse(readFileSync(join(dir, 'package.json'), {
                  encoding: 'utf8'
                })).main || entryPoint;
              }
            } catch (ignored) {// ignored
            }

            code += `\ncommonjsRegister(${JSON.stringify(getVirtualPathForDynamicRequirePath(dir, commonDir))}, function (module, exports) {
  module.exports = require(${JSON.stringify(normalizePathSlashes(join(dir, entryPoint)))});
});`;
          }
        } catch (err) {
          _iterator.e(err);
        } finally {
          _iterator.f();
        }

        return code;
      }

      let actualId = id;
      const isDynamicJson = actualId.startsWith(DYNAMIC_JSON_PREFIX);

      if (isDynamicJson) {
        actualId = actualId.slice(DYNAMIC_JSON_PREFIX.length);
      }

      const normalizedPath = normalizePathSlashes(actualId);

      if (isDynamicJson) {
        return `require('${HELPERS_ID}').commonjsRegister(${JSON.stringify(getVirtualPathForDynamicRequirePath(normalizedPath, commonDir))}, function (module, exports) {
  module.exports = require(${JSON.stringify(normalizedPath)});
});`;
      }

      if (dynamicRequireModuleSet.has(normalizedPath) && !normalizedPath.endsWith('.json')) {
        // Try our best to still export the module fully.
        // The commonjs polyfill should take care of circular references.
        return `require('${HELPERS_ID}').commonjsRegister(${JSON.stringify(getVirtualPathForDynamicRequirePath(normalizedPath, commonDir))}, function (module, exports) {
  ${readFileSync(normalizedPath, {
          encoding: 'utf8'
        })}
});`;
      }

      if (actualId.endsWith(PROXY_SUFFIX)) {
        actualId = getIdFromProxyId(actualId);
        const name = getName(actualId);
        return getIsCjsPromise(actualId).then(isCjs => {
          if (dynamicRequireModuleSet.has(normalizePathSlashes(actualId)) && !actualId.endsWith('.json')) return `import {commonjsRequire} from '${HELPERS_ID}'; const ${name} = commonjsRequire(${JSON.stringify(getVirtualPathForDynamicRequirePath(normalizePathSlashes(actualId), commonDir))}); export default (${name} && ${name}['default']) || ${name}`;else if (isCjs) return `import { __moduleExports } from ${JSON.stringify(actualId)}; export default __moduleExports;`;else if (esModulesWithoutDefaultExport.has(actualId)) return `import * as ${name} from ${JSON.stringify(actualId)}; export default ${name};`;else if (esModulesWithDefaultExport.has(actualId)) {
            return `export {default} from ${JSON.stringify(actualId)};`;
          }
          return `import * as ${name} from ${JSON.stringify(actualId)}; import {getCjsExportFromNamespace} from "${HELPERS_ID}"; export default getCjsExportFromNamespace(${name})`;
        });
      }

      if (isDynamicRequireModulesEnabled && this.getModuleInfo(id).isEntry) {
        let code;

        try {
          code = readFileSync(actualId, {
            encoding: 'utf8'
          });
        } catch (ex) {
          this.warn(`Failed to read file ${actualId}, dynamic modules might not work correctly`);
          return null;
        }

        let dynamicImports = Array.from(dynamicRequireModuleSet).map(dynamicId => `require(${JSON.stringify(DYNAMIC_REGISTER_PREFIX + dynamicId)});`).join('\n');

        if (dynamicRequireModuleDirPaths.length) {
          dynamicImports += `require(${JSON.stringify(DYNAMIC_REGISTER_PREFIX + DYNAMIC_PACKAGES_ID)});`;
        }

        code = `${dynamicImports}\n${code}`;
        return code;
      }

      return null;
    },

    transform(code, id) {
      if (id !== DYNAMIC_PACKAGES_ID && !id.startsWith(DYNAMIC_JSON_PREFIX)) {
        if (!filter(id) || extensions.indexOf(extname(id)) === -1) {
          setIsCjsPromise(id, null);
          return null;
        }
      }

      let transformed;

      try {
        transformed = transformAndCheckExports.call(this, code, id);
      } catch (err) {
        transformed = null;
        setIsCjsPromise(id, false);
        this.error(err, err.loc);
      }

      return transformed;
    }

  };
}

export default commonjs;
//# sourceMappingURL=index.es.js.map