'use strict';

function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }

var path = require('path');
var builtinList = _interopDefault(require('builtin-modules'));
var resolveId = _interopDefault(require('resolve'));
var isModule = _interopDefault(require('is-module'));
var fs = _interopDefault(require('fs'));
var rollupPluginutils = require('rollup-pluginutils');

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

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

function _iterableToArrayLimit(arr, i) {
  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 _nonIterableRest() {
  throw new TypeError("Invalid attempt to destructure non-iterable instance");
}

var peerDependencies = {
	rollup: ">=1.11.0"
};

const builtins = new Set(builtinList);
const ES6_BROWSER_EMPTY = '\0node-resolve:empty.js'; // It is important that .mjs occur before .js so that Rollup will interpret npm modules
// which deploy both ESM .mjs and CommonJS .js files as ESM.

const DEFAULT_EXTS = ['.mjs', '.js', '.json', '.node'];

const existsAsync = file => new Promise(fulfil => fs.exists(file, fulfil));

const readFileAsync = file => new Promise((fulfil, reject) => fs.readFile(file, (err, contents) => err ? reject(err) : fulfil(contents)));

const realpathAsync = file => new Promise((fulfil, reject) => fs.realpath(file, (err, contents) => err ? reject(err) : fulfil(contents)));

const statAsync = file => new Promise((fulfil, reject) => fs.stat(file, (err, contents) => err ? reject(err) : fulfil(contents)));

const cache = fn => {
  const cache = new Map();

  const wrapped = (param, done) => {
    if (cache.has(param) === false) {
      cache.set(param, fn(param).catch(err => {
        cache.delete(param);
        throw err;
      }));
    }

    return cache.get(param).then(result => done(null, result), done);
  };

  wrapped.clear = () => cache.clear();

  return wrapped;
};

const ignoreENOENT = err => {
  if (err.code === 'ENOENT') return false;
  throw err;
};

const readFileCached = cache(readFileAsync);
const isDirCached = cache(file => statAsync(file).then(stat => stat.isDirectory(), ignoreENOENT));
const isFileCached = cache(file => statAsync(file).then(stat => stat.isFile(), ignoreENOENT));

function getMainFields(options) {
  let mainFields;

  if (options.mainFields) {
    if ('module' in options || 'main' in options || 'jsnext' in options) {
      throw new Error(`node-resolve: do not use deprecated 'module', 'main', 'jsnext' options with 'mainFields'`);
    }

    mainFields = options.mainFields;
  } else {
    mainFields = [];
    [['module', 'module', true], ['jsnext', 'jsnext:main', false], ['main', 'main', true]].forEach(([option, field, defaultIncluded]) => {
      if (option in options) {
        // eslint-disable-next-line no-console
        console.warn(`node-resolve: setting options.${option} is deprecated, please override options.mainFields instead`);

        if (options[option]) {
          mainFields.push(field);
        }
      } else if (defaultIncluded) {
        mainFields.push(field);
      }
    });
  }

  if (options.browser && mainFields.indexOf('browser') === -1) {
    return ['browser'].concat(mainFields);
  }

  if (!mainFields.length) {
    throw new Error(`Please ensure at least one 'mainFields' value is specified`);
  }

  return mainFields;
}

const alwaysNull = () => null;

const resolveIdAsync = (file, opts) => new Promise((fulfil, reject) => resolveId(file, opts, (err, contents) => err ? reject(err) : fulfil(contents))); // Resolve module specifiers in order. Promise resolves to the first
// module that resolves successfully, or the error that resulted from
// the last attempted module resolution.


function resolveImportSpecifiers(importSpecifierList, resolveOptions) {
  let p = Promise.resolve();

  for (let i = 0; i < importSpecifierList.length; i++) {
    p = p.then(v => {
      // if we've already resolved to something, just return it.
      if (v) return v;
      return resolveIdAsync(importSpecifierList[i], resolveOptions);
    });

    if (i < importSpecifierList.length - 1) {
      // swallow MODULE_NOT_FOUND errors from all but the last resolution
      p = p.catch(err => {
        if (err.code !== 'MODULE_NOT_FOUND') {
          throw err;
        }
      });
    }
  }

  return p;
}

function nodeResolve(options = {}) {
  const mainFields = getMainFields(options);
  const useBrowserOverrides = mainFields.indexOf('browser') !== -1;
  const dedupe = options.dedupe || [];
  const isPreferBuiltinsSet = options.preferBuiltins === true || options.preferBuiltins === false;
  const preferBuiltins = isPreferBuiltinsSet ? options.preferBuiltins : true;
  const customResolveOptions = options.customResolveOptions || {};
  const jail = options.jail;
  const only = Array.isArray(options.only) ? options.only.map(o => o instanceof RegExp ? o : new RegExp('^' + String(o).replace(/[\\^$*+?.()|[\]{}]/g, '\\$&') + '$')) : null;
  const browserMapCache = new Map();

  if (options.skip) {
    throw new Error('options.skip is no longer supported — you should use the main Rollup `external` option instead');
  }

  const extensions = options.extensions || DEFAULT_EXTS;
  const packageInfoCache = new Map();
  const shouldDedupe = typeof dedupe === 'function' ? dedupe : importee => dedupe.includes(importee);

  function getCachedPackageInfo(pkg, pkgPath) {
    if (packageInfoCache.has(pkgPath)) {
      return packageInfoCache.get(pkgPath);
    }

    const pkgRoot = path.dirname(pkgPath);
    let overriddenMain = false;

    for (let i = 0; i < mainFields.length; i++) {
      const field = mainFields[i];

      if (typeof pkg[field] === 'string') {
        pkg['main'] = pkg[field];
        overriddenMain = true;
        break;
      }
    }

    const packageInfo = {
      cachedPkg: pkg,
      hasModuleSideEffects: alwaysNull,
      hasPackageEntry: overriddenMain !== false || mainFields.indexOf('main') !== -1,
      packageBrowserField: useBrowserOverrides && typeof pkg['browser'] === 'object' && Object.keys(pkg['browser']).reduce((browser, key) => {
        let resolved = pkg['browser'][key];

        if (resolved && resolved[0] === '.') {
          resolved = path.resolve(pkgRoot, resolved);
        }

        browser[key] = resolved;

        if (key[0] === '.') {
          const absoluteKey = path.resolve(pkgRoot, key);
          browser[absoluteKey] = resolved;

          if (!path.extname(key)) {
            extensions.reduce((browser, ext) => {
              browser[absoluteKey + ext] = browser[key];
              return browser;
            }, browser);
          }
        }

        return browser;
      }, {})
    };
    const packageSideEffects = pkg['sideEffects'];

    if (typeof packageSideEffects === 'boolean') {
      packageInfo.hasModuleSideEffects = () => packageSideEffects;
    } else if (Array.isArray(packageSideEffects)) {
      packageInfo.hasModuleSideEffects = rollupPluginutils.createFilter(packageSideEffects, null, {
        resolve: pkgRoot
      });
    }

    packageInfoCache.set(pkgPath, packageInfo);
    return packageInfo;
  }

  let preserveSymlinks;
  return {
    name: 'node-resolve',

    buildStart(options) {
      preserveSymlinks = options.preserveSymlinks;

      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-node-resolve" requires at least rollup@${minVersion} but found rollup@${this.meta.rollupVersion}.`);
      }
    },

    generateBundle() {
      readFileCached.clear();
      isFileCached.clear();
      isDirCached.clear();
    },

    resolveId(importee, importer) {
      if (importee === ES6_BROWSER_EMPTY) {
        return importee;
      }

      if (/\0/.test(importee)) return null; // ignore IDs with null character, these belong to other plugins

      const basedir = importer ? path.dirname(importer) : process.cwd();

      if (shouldDedupe(importee)) {
        importee = path.join(process.cwd(), 'node_modules', importee);
      } // https://github.com/defunctzombie/package-browser-field-spec


      const browser = browserMapCache.get(importer);

      if (useBrowserOverrides && browser) {
        const resolvedImportee = path.resolve(basedir, importee);

        if (browser[importee] === false || browser[resolvedImportee] === false) {
          return ES6_BROWSER_EMPTY;
        }

        const browserImportee = browser[importee] || browser[resolvedImportee] || browser[resolvedImportee + '.js'] || browser[resolvedImportee + '.json'];

        if (browserImportee) {
          importee = browserImportee;
        }
      }

      const parts = importee.split(/[/\\]/);
      let id = parts.shift();

      if (id[0] === '@' && parts.length > 0) {
        // scoped packages
        id += `/${parts.shift()}`;
      } else if (id[0] === '.') {
        // an import relative to the parent dir of the importer
        id = path.resolve(basedir, importee);
      }

      if (only && !only.some(pattern => pattern.test(id))) return null;
      let hasModuleSideEffects = alwaysNull;
      let hasPackageEntry = true;
      let packageBrowserField = false;
      const resolveOptions = {
        basedir,

        packageFilter(pkg, pkgPath) {
          let cachedPkg;

          var _getCachedPackageInfo = getCachedPackageInfo(pkg, pkgPath);

          cachedPkg = _getCachedPackageInfo.cachedPkg;
          hasModuleSideEffects = _getCachedPackageInfo.hasModuleSideEffects;
          hasPackageEntry = _getCachedPackageInfo.hasPackageEntry;
          packageBrowserField = _getCachedPackageInfo.packageBrowserField;
          return cachedPkg;
        },

        readFile: readFileCached,
        isFile: isFileCached,
        isDirectory: isDirCached,
        extensions: extensions
      };

      if (preserveSymlinks !== undefined) {
        resolveOptions.preserveSymlinks = preserveSymlinks;
      }

      const importSpecifierList = [];

      if (importer === undefined && !importee[0].match(/^\.?\.?\//)) {
        // For module graph roots (i.e. when importer is undefined), we
        // need to handle 'path fragments` like `foo/bar` that are commonly
        // found in rollup config files. If importee doesn't look like a
        // relative or absolute path, we make it relative and attempt to
        // resolve it. If we don't find anything, we try resolving it as we
        // got it.
        importSpecifierList.push('./' + importee);
      }

      const importeeIsBuiltin = builtins.has(importee);

      if (importeeIsBuiltin && (!preferBuiltins || !isPreferBuiltinsSet)) {
        // The `resolve` library will not resolve packages with the same
        // name as a node built-in module. If we're resolving something
        // that's a builtin, and we don't prefer to find built-ins, we
        // first try to look up a local module with that name. If we don't
        // find anything, we resolve the builtin which just returns back
        // the built-in's name.
        importSpecifierList.push(importee + '/');
      }

      importSpecifierList.push(importee);
      return resolveImportSpecifiers(importSpecifierList, Object.assign(resolveOptions, customResolveOptions)).then(resolved => {
        if (resolved && packageBrowserField) {
          if (Object.prototype.hasOwnProperty.call(packageBrowserField, resolved)) {
            if (!packageBrowserField[resolved]) {
              browserMapCache.set(resolved, packageBrowserField);
              return ES6_BROWSER_EMPTY;
            }

            resolved = packageBrowserField[resolved];
          }

          browserMapCache.set(resolved, packageBrowserField);
        }

        if (hasPackageEntry && !preserveSymlinks && resolved) {
          return existsAsync(resolved).then(exists => exists ? realpathAsync(resolved) : resolved);
        }

        return resolved;
      }).then(resolved => {
        if (hasPackageEntry) {
          if (builtins.has(resolved) && preferBuiltins && isPreferBuiltinsSet) {
            return null;
          } else if (importeeIsBuiltin && preferBuiltins) {
            if (!isPreferBuiltinsSet) {
              this.warn(`preferring built-in module '${importee}' over local alternative ` + `at '${resolved}', pass 'preferBuiltins: false' to disable this ` + `behavior or 'preferBuiltins: true' to disable this warning`);
            }

            return null;
          } else if (jail && resolved.indexOf(path.normalize(jail.trim(path.sep))) !== 0) {
            return null;
          }
        }

        if (resolved && options.modulesOnly) {
          return readFileAsync(resolved).then(code => isModule(code) ? {
            id: resolved,
            moduleSideEffects: hasModuleSideEffects(resolved)
          } : null);
        } else {
          return {
            id: resolved,
            moduleSideEffects: hasModuleSideEffects(resolved)
          };
        }
      }).catch(() => null);
    },

    load(importee) {
      if (importee === ES6_BROWSER_EMPTY) {
        return 'export default {};';
      }

      return null;
    }

  };
}

module.exports = nodeResolve;