'use strict';

var _fs;

function _load_fs() {
  return (_fs = _interopRequireDefault(require('fs')));
}

var _path;

function _load_path() {
  return (_path = _interopRequireDefault(require('path')));
}

var _node_modules_paths;

function _load_node_modules_paths() {
  return (_node_modules_paths = _interopRequireDefault(
    require('./node_modules_paths')
  ));
}

var _is_builtin_module;

function _load_is_builtin_module() {
  return (_is_builtin_module = _interopRequireDefault(
    require('./is_builtin_module')
  ));
}

var _default_resolver;

function _load_default_resolver() {
  return (_default_resolver = _interopRequireDefault(
    require('./default_resolver.js')
  ));
}

var _chalk;

function _load_chalk() {
  return (_chalk = _interopRequireDefault(require('chalk')));
}

function _interopRequireDefault(obj) {
  return obj && obj.__esModule ? obj : {default: obj};
}

function _toConsumableArray(arr) {
  if (Array.isArray(arr)) {
    for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++)
      arr2[i] = arr[i];
    return arr2;
  } else {
    return Array.from(arr);
  }
}
/**
 * Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 *
 */

const NATIVE_PLATFORM = 'native';

// We might be inside a symlink.
const cwd = process.cwd();
const resolvedCwd = (_fs || _load_fs()).default.realpathSync(cwd) || cwd;
const nodePaths = process.env.NODE_PATH
  ? process.env.NODE_PATH.split((_path || _load_path()).default.delimiter)
      .filter(Boolean)
      // The resolver expects absolute paths.
      .map(p => (_path || _load_path()).default.resolve(resolvedCwd, p))
  : null;

class Resolver {
  constructor(moduleMap, options) {
    this._options = {
      browser: options.browser,
      defaultPlatform: options.defaultPlatform,
      extensions: options.extensions,
      hasCoreModules:
        options.hasCoreModules === undefined ? true : options.hasCoreModules,
      moduleDirectories: options.moduleDirectories || ['node_modules'],
      moduleNameMapper: options.moduleNameMapper,
      modulePaths: options.modulePaths,
      platforms: options.platforms,
      resolver: options.resolver,
      rootDir: options.rootDir
    };
    this._moduleMap = moduleMap;
    this._moduleIDCache = Object.create(null);
    this._moduleNameCache = Object.create(null);
    this._modulePathCache = Object.create(null);
  }

  static findNodeModule(path, options) {
    const resolver = options.resolver /* $FlowFixMe */
      ? require(options.resolver)
      : (_default_resolver || _load_default_resolver()).default;
    const paths = options.paths;

    try {
      return resolver(path, {
        basedir: options.basedir,
        browser: options.browser,
        extensions: options.extensions,
        moduleDirectory: options.moduleDirectory,
        paths: paths ? (nodePaths || []).concat(paths) : nodePaths,
        rootDir: options.rootDir
      });
    } catch (e) {}
    return null;
  }

  resolveModuleFromDirIfExists(dirname, moduleName, options) {
    const paths = (options && options.paths) || this._options.modulePaths;
    const moduleDirectory = this._options.moduleDirectories;
    const key =
      dirname + (_path || _load_path()).default.delimiter + moduleName;
    const defaultPlatform = this._options.defaultPlatform;
    const extensions = this._options.extensions.slice();
    if (this._supportsNativePlatform()) {
      extensions.unshift.apply(
        extensions,
        _toConsumableArray(
          this._options.extensions.map(ext => '.' + NATIVE_PLATFORM + ext)
        )
      );
    }
    if (defaultPlatform) {
      extensions.unshift.apply(
        extensions,
        _toConsumableArray(
          this._options.extensions.map(ext => '.' + defaultPlatform + ext)
        )
      );
    }

    // 0. If we have already resolved this module for this directory name,
    //    return a value from the cache.
    if (this._moduleNameCache[key]) {
      return this._moduleNameCache[key];
    }

    // 1. Check if the module is a haste module.
    let module = this.getModule(moduleName);
    if (module) {
      return (this._moduleNameCache[key] = module);
    }

    // 2. Check if the module is a node module and resolve it based on
    //    the node module resolution algorithm.
    // If skipNodeResolution is given we ignore all modules that look like
    // node modules (ie. are not relative requires). This enables us to speed
    // up resolution when we build a dependency graph because we don't have
    // to look at modules that may not exist and aren't mocked.
    const skipResolution =
      options &&
      options.skipNodeResolution &&
      !moduleName.includes((_path || _load_path()).default.sep);

    const resolveNodeModule = name =>
      Resolver.findNodeModule(name, {
        basedir: dirname,
        browser: this._options.browser,
        extensions: extensions,
        moduleDirectory: moduleDirectory,
        paths: paths,
        resolver: this._options.resolver,
        rootDir: this._options.rootDir
      });

    if (!skipResolution) {
      module = resolveNodeModule(moduleName);

      if (module) {
        return (this._moduleNameCache[key] = module);
      }
    }

    // 3. Resolve "haste packages" which are `package.json` files outside of
    // `node_modules` folders anywhere in the file system.
    const parts = moduleName.split('/');
    const hastePackage = this.getPackage(parts.shift());
    if (hastePackage) {
      try {
        const module = (_path || _load_path()).default.join.apply(
          (_path || _load_path()).default,
          [(_path || _load_path()).default.dirname(hastePackage)].concat(parts)
        );
        // try resolving with custom resolver first to support extensions,
        // then fallback to require.resolve
        return (this._moduleNameCache[key] =
          resolveNodeModule(module) || require.resolve(module));
      } catch (ignoredError) {}
    }

    return null;
  }

  resolveModule(from, moduleName, options) {
    const dirname = (_path || _load_path()).default.dirname(from);
    const module = this.resolveModuleFromDirIfExists(
      dirname,
      moduleName,
      options
    );
    if (module) return module;

    // (4.) Throw an error if the module could not be found. `resolve.sync`
    //      only produces an error based on the dirname but we have the actual
    //      current module name available.
    const relativePath = (_path || _load_path()).default.relative(
      dirname,
      from
    );
    const err = new Error(
      `Cannot find module '${moduleName}' from '${relativePath || '.'}'`
    );
    err.code = 'MODULE_NOT_FOUND';
    throw err;
  }

  isCoreModule(moduleName) {
    return (
      this._options.hasCoreModules &&
      (0, (_is_builtin_module || _load_is_builtin_module()).default)(moduleName)
    );
  }

  getModule(name) {
    return this._moduleMap.getModule(
      name,
      this._options.defaultPlatform,
      this._supportsNativePlatform()
    );
  }

  getModulePath(from, moduleName) {
    if (
      moduleName[0] !== '.' ||
      (_path || _load_path()).default.isAbsolute(moduleName)
    ) {
      return moduleName;
    }
    return (_path || _load_path()).default.normalize(
      (_path || _load_path()).default.dirname(from) + '/' + moduleName
    );
  }

  getPackage(name) {
    return this._moduleMap.getPackage(
      name,
      this._options.defaultPlatform,
      this._supportsNativePlatform()
    );
  }

  getMockModule(from, name) {
    const mock = this._moduleMap.getMockModule(name);
    if (mock) {
      return mock;
    } else {
      const moduleName = this._resolveStubModuleName(from, name);
      if (moduleName) {
        return this.getModule(moduleName) || moduleName;
      }
    }
    return null;
  }

  getModulePaths(from) {
    if (!this._modulePathCache[from]) {
      const moduleDirectory = this._options.moduleDirectories;
      const paths = (0,
      (_node_modules_paths || _load_node_modules_paths()).default)(from, {
        moduleDirectory: moduleDirectory
      });
      if (paths[paths.length - 1] === undefined) {
        // circumvent node-resolve bug that adds `undefined` as last item.
        paths.pop();
      }
      this._modulePathCache[from] = paths;
    }
    return this._modulePathCache[from];
  }

  getModuleID(virtualMocks, from, _moduleName) {
    const moduleName = _moduleName || '';

    const key = from + (_path || _load_path()).default.delimiter + moduleName;
    if (this._moduleIDCache[key]) {
      return this._moduleIDCache[key];
    }

    const moduleType = this._getModuleType(moduleName);
    const absolutePath = this._getAbsolutePath(virtualMocks, from, moduleName);
    const mockPath = this._getMockPath(from, moduleName);

    const sep = (_path || _load_path()).default.delimiter;
    const id =
      moduleType +
      sep +
      (absolutePath ? absolutePath + sep : '') +
      (mockPath ? mockPath + sep : '');

    return (this._moduleIDCache[key] = id);
  }

  _getModuleType(moduleName) {
    return this.isCoreModule(moduleName) ? 'node' : 'user';
  }

  _getAbsolutePath(virtualMocks, from, moduleName) {
    if (this.isCoreModule(moduleName)) {
      return moduleName;
    }
    return this._isModuleResolved(from, moduleName)
      ? this.getModule(moduleName)
      : this._getVirtualMockPath(virtualMocks, from, moduleName);
  }

  _getMockPath(from, moduleName) {
    return !this.isCoreModule(moduleName)
      ? this.getMockModule(from, moduleName)
      : null;
  }

  _getVirtualMockPath(virtualMocks, from, moduleName) {
    const virtualMockPath = this.getModulePath(from, moduleName);
    return virtualMocks[virtualMockPath]
      ? virtualMockPath
      : moduleName
        ? this.resolveModule(from, moduleName)
        : from;
  }

  _isModuleResolved(from, moduleName) {
    return !!(
      this.getModule(moduleName) || this.getMockModule(from, moduleName)
    );
  }

  _resolveStubModuleName(from, moduleName) {
    const dirname = (_path || _load_path()).default.dirname(from);
    const paths = this._options.modulePaths;
    const extensions = this._options.extensions;
    const moduleDirectory = this._options.moduleDirectories;
    const moduleNameMapper = this._options.moduleNameMapper;
    const resolver = this._options.resolver;

    if (moduleNameMapper) {
      for (const _ref of moduleNameMapper) {
        const mappedModuleName = _ref.moduleName;
        const regex = _ref.regex;

        if (regex.test(moduleName)) {
          // Note: once a moduleNameMapper matches the name, it must result
          // in a module, or else an error is thrown.
          const matches = moduleName.match(regex);
          const updatedName = matches
            ? mappedModuleName.replace(
                /\$([0-9]+)/g,
                (_, index) => matches[parseInt(index, 10)]
              )
            : mappedModuleName;

          const module =
            this.getModule(updatedName) ||
            Resolver.findNodeModule(updatedName, {
              basedir: dirname,
              browser: this._options.browser,
              extensions: extensions,
              moduleDirectory: moduleDirectory,
              paths: paths,
              resolver: resolver,
              rootDir: this._options.rootDir
            });
          if (!module) {
            throw createNoMappedModuleFoundError(
              moduleName,
              updatedName,
              mappedModuleName,
              regex,
              resolver
            );
          }
          return module;
        }
      }
    }
    return null;
  }

  _supportsNativePlatform() {
    return (this._options.platforms || []).indexOf(NATIVE_PLATFORM) !== -1;
  }
}

const createNoMappedModuleFoundError = (
  moduleName,
  updatedName,
  mappedModuleName,
  regex,
  resolver
) => {
  const error = new Error(
    (_chalk || _load_chalk()).default.red(`${(
      _chalk || _load_chalk()
    ).default.bold('Configuration error')}:

Could not locate module ${(_chalk || _load_chalk()).default.bold(
      moduleName
    )} mapped as:
${(_chalk || _load_chalk()).default.bold(updatedName)}.

Please check your configuration for these entries:
{
  "moduleNameMapper": {
    "${regex.toString()}": "${(_chalk || _load_chalk()).default.bold(
      mappedModuleName
    )}"
  },
  "resolver": ${(_chalk || _load_chalk()).default.bold(String(resolver))}
}`)
  );

  error.name = '';

  return error;
};

module.exports = Resolver;