/**
 * @fileoverview Defines environment settings and globals.
 * @author Elan Shanker
 */

//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------

import globals from 'globals';

//------------------------------------------------------------------------------
// Helpers
//------------------------------------------------------------------------------

/**
 * Get the object that has difference.
 * @param {Record<string,boolean>} current The newer object.
 * @param {Record<string,boolean>} prev The older object.
 * @returns {Record<string,boolean>} The difference object.
 */
function getDiff(current, prev) {
  const retv = {};

  for (const [key, value] of Object.entries(current)) {
    if (!Object.hasOwn(prev, key)) {
      retv[key] = value;
    }
  }

  return retv;
}

const newGlobals2015 = getDiff(globals.es2015, globals.es5); // 19 variables such as Promise, Map, ...
const newGlobals2017 = {
  Atomics: false,
  SharedArrayBuffer: false,
};
const newGlobals2020 = {
  BigInt: false,
  BigInt64Array: false,
  BigUint64Array: false,
  globalThis: false,
};

const newGlobals2021 = {
  AggregateError: false,
  FinalizationRegistry: false,
  WeakRef: false,
};

//------------------------------------------------------------------------------
// Public Interface
//------------------------------------------------------------------------------

/** @type {Map<string, import("../lib/shared/types").Environment>} */
export default new Map(
  Object.entries({
    // Language
    builtin: {
      globals: globals.es5,
    },
    es6: {
      globals: newGlobals2015,
      parserOptions: {
        ecmaVersion: 6,
      },
    },
    es2015: {
      globals: newGlobals2015,
      parserOptions: {
        ecmaVersion: 6,
      },
    },
    es2016: {
      globals: newGlobals2015,
      parserOptions: {
        ecmaVersion: 7,
      },
    },
    es2017: {
      globals: { ...newGlobals2015, ...newGlobals2017 },
      parserOptions: {
        ecmaVersion: 8,
      },
    },
    es2018: {
      globals: { ...newGlobals2015, ...newGlobals2017 },
      parserOptions: {
        ecmaVersion: 9,
      },
    },
    es2019: {
      globals: { ...newGlobals2015, ...newGlobals2017 },
      parserOptions: {
        ecmaVersion: 10,
      },
    },
    es2020: {
      globals: { ...newGlobals2015, ...newGlobals2017, ...newGlobals2020 },
      parserOptions: {
        ecmaVersion: 11,
      },
    },
    es2021: {
      globals: {
        ...newGlobals2015,
        ...newGlobals2017,
        ...newGlobals2020,
        ...newGlobals2021,
      },
      parserOptions: {
        ecmaVersion: 12,
      },
    },
    es2022: {
      globals: {
        ...newGlobals2015,
        ...newGlobals2017,
        ...newGlobals2020,
        ...newGlobals2021,
      },
      parserOptions: {
        ecmaVersion: 13,
      },
    },
    es2023: {
      globals: {
        ...newGlobals2015,
        ...newGlobals2017,
        ...newGlobals2020,
        ...newGlobals2021,
      },
      parserOptions: {
        ecmaVersion: 14,
      },
    },
    es2024: {
      globals: {
        ...newGlobals2015,
        ...newGlobals2017,
        ...newGlobals2020,
        ...newGlobals2021,
      },
      parserOptions: {
        ecmaVersion: 15,
      },
    },

    // Platforms
    browser: {
      globals: globals.browser,
    },
    node: {
      globals: globals.node,
      parserOptions: {
        ecmaFeatures: {
          globalReturn: true,
        },
      },
    },
    'shared-node-browser': {
      globals: globals['shared-node-browser'],
    },
    worker: {
      globals: globals.worker,
    },
    serviceworker: {
      globals: globals.serviceworker,
    },

    // Frameworks
    commonjs: {
      globals: globals.commonjs,
      parserOptions: {
        ecmaFeatures: {
          globalReturn: true,
        },
      },
    },
    amd: {
      globals: globals.amd,
    },
    mocha: {
      globals: globals.mocha,
    },
    jasmine: {
      globals: globals.jasmine,
    },
    jest: {
      globals: globals.jest,
    },
    phantomjs: {
      globals: globals.phantomjs,
    },
    jquery: {
      globals: globals.jquery,
    },
    qunit: {
      globals: globals.qunit,
    },
    prototypejs: {
      globals: globals.prototypejs,
    },
    shelljs: {
      globals: globals.shelljs,
    },
    meteor: {
      globals: globals.meteor,
    },
    mongo: {
      globals: globals.mongo,
    },
    protractor: {
      globals: globals.protractor,
    },
    applescript: {
      globals: globals.applescript,
    },
    nashorn: {
      globals: globals.nashorn,
    },
    atomtest: {
      globals: globals.atomtest,
    },
    embertest: {
      globals: globals.embertest,
    },
    webextensions: {
      globals: globals.webextensions,
    },
    greasemonkey: {
      globals: globals.greasemonkey,
    },
  })
);