#!/usr/bin/env node

const This = require('./this');
const util = require('util');

// Example of subcommands which are implemented as stand-alone executable files.
//
// When `.command()` is invoked with a description argument,
// this tells Commander that you're going to use a stand-alone executable for the subcommand.
//
// Only `install` and `list` are implemented, see pm-install and pm-list.js
class Pm extends This {
  constructor() {
    super();
    this.version = '0.0.1';
    this.description = 'Fake package manager';
    super.init(); // initialize commander with overridden version and description
  }

  install() {
    /**
     * @command('install one or more packages')
     * @alias('i')
     */
    // Calls stand-alone excutable `pm-install` because of @command(<description>) in docstring
  }

  search() {
    /**
     * @command('search with optional query')
     * @alias('s')
     */
    // Calls stand-alone excutable `pm-search` because of @command(<description>) in docstring
  }

  update() {
    /**
     * @command('update installed packages')
     * @executable('myUpdateSubCommand')
     */
    // Calls stand-alone excutable `myUpdateSubCommand` because of @command(<description>) in docstring
  }

  list() {
    /**
     * @command('list packages installed')
     */
    // Calls stand-alone excutable `pm-list` because of @command(<description>) in docstring
  }

  // override This.discovery()
  discovery() {
    const methods = this.listMethods();
    return methods;
  }

  // Basic test methods
  _testListMethod() {
    const pm = new Pm();
    const pmMethods = pm.listMethods();

    const testMethods =
      pmMethods.includes('install') &&
      pmMethods.includes('search') &&
      pmMethods.includes('update') &&
      pmMethods.includes('list') &&
      pmMethods.includes('discovery') &&
      pmMethods.includes('start');
    const testInternalMethods = !pmMethods.includes('_testListMethod');

    console.assert(testMethods, 'Pm.listMethod() failed');
    console.assert(
      testInternalMethods,
      'Pm.listMethod() for internal methods failed. Classes with _ should be ignored'
    );

    if (testMethods && testInternalMethods) {
      this.execCmd(`${this.workingDir}/log success 'testListMethod passed'`);
    } else {
      this.execCmd(`${this.workingDir}/log error 'testListMethod failed'`);
    }
  }

  _testListProperties() {
    const pm = new Pm();
    const pmProperties = pm.listProperties();

    const testProperties =
      pmProperties.includes('version') && pmProperties.includes('description') && pmProperties.includes('program');
    console.assert(testProperties, 'Pm.listProperties() failed');

    if (testProperties) {
      this.execCmd(`${this.workingDir}/log success 'testListProperties passed'`);
    } else {
      this.execCmd(`${this.workingDir}/log error 'testListProperties failed'`);
    }
  }

  _testGetClassName() {
    const pm = new Pm();
    const pmClassName = pm.getClassName();

    const testClassName = pmClassName === 'Pm';
    console.assert(testClassName, 'Pm.getClassName() failed');

    if (testClassName) {
      this.execCmd(`${this.workingDir}/log success 'testGetClassName passed'`);
    } else {
      this.execCmd(`${this.workingDir}/log error 'testGetClassName failed'`);
    }
  }

  selfTest() {
    // Run tests
    this._testListMethod();
    this._testListProperties();
    this._testGetClassName();
  }

  start() {
    this.program.parse();

    if (Object.keys(this.program.opts()).length || this.program.args.length) {
      // Debugging commander options and arguments
      const opts = util.inspect(this.program.opts(), { depth: null, colors: true, showHidden: true });
      const args = util.inspect(this.program.args, { depth: null, colors: true, showHidden: true });
      this.execCmd(`${this.workingDir}/log echo 'Options: ${opts}'`);
      this.execCmd(`${this.workingDir}/log echo 'Remaining arguments: ${args}'`);
    } else {
      this.program.outputHelp();
    }

    // applies logDecorator to this.discovery() and binds it to 'this' to maintain the correct context
    //const logDecoratedDiscovery = this._logDecorator(this.discovery).bind(this);
    //logDecoratedDiscovery();

    // Try the following on macOS or Linux:
    //    ./examples/pm
    //
    // Try the following:
    //    ./pm
    //    ./pm help install
    //    ./pm install -h
    //    ./pm install foo bar baz
    //    ./pm install foo bar baz --force
  }
}

// main
const pm = new Pm();
// // applies logDecorator to this.discovery() and binds it to the instance to maintain the correct context
// const logDecoratedDiscovery = pm._logDecorator(pm.discovery).bind(pm);
// logDecoratedDiscovery();

pm.start();
//pm.selfTest();