<?php
/**
 * The MIT License (MIT)
 * 
 * Copyright (c) Taylor Otwell
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
namespace Illuminate\Console;

use Illuminate\Support\Str;
use Illuminate\Filesystem\Filesystem;
use Symfony\Component\Console\Input\InputArgument;

abstract class GeneratorCommand extends Command
{
    /**
     * The filesystem instance.
     *
     * @var \Illuminate\Filesystem\Filesystem
     */
    protected $files;

    /**
     * The type of class being generated.
     *
     * @var string
     */
    protected $type;

    /**
     * Create a new controller creator command instance.
     *
     * @param  \Illuminate\Filesystem\Filesystem  $files
     * @return void
     */
    public function __construct(Filesystem $files)
    {
        parent::__construct();

        $this->files = $files;
    }

    /**
     * Get the stub file for the generator.
     *
     * @return string
     */
    abstract protected function getStub();

    /**
     * Execute the console command.
     *
     * @return bool|null
     */
    public function handle()
    {
        $name = $this->qualifyClass($this->getNameInput());

        $path = $this->getPath($name);

        // First we will check to see if the class already exists. If it does, we don't want
        // to create the class and overwrite the user's code. So, we will bail out so the
        // code is untouched. Otherwise, we will continue generating this class' files.
        if ($this->alreadyExists($this->getNameInput())) {
            $this->error($this->type.' already exists!');

            return false;
        }

        // Next, we will generate the path to the location where this class' file should get
        // written. Then, we will build the class and make the proper replacements on the
        // stub files so that it gets the correctly formatted namespace and class name.
        $this->makeDirectory($path);

        $this->files->put($path, $this->buildClass($name));

        $this->info($this->type.' created successfully.');
    }

    /**
     * Parse the class name and format according to the root namespace.
     *
     * @param  string  $name
     * @return string
     */
    protected function qualifyClass($name)
    {
        $name = ltrim($name, '\\/');

        $rootNamespace = $this->rootNamespace();

        if (Str::startsWith($name, $rootNamespace)) {
            return $name;
        }

        $name = str_replace('/', '\\', $name);

        return $this->qualifyClass(
            $this->getDefaultNamespace(trim($rootNamespace, '\\')).'\\'.$name
        );
    }

    /**
     * Get the default namespace for the class.
     *
     * @param  string  $rootNamespace
     * @return string
     */
    protected function getDefaultNamespace($rootNamespace)
    {
        return $rootNamespace;
    }

    /**
     * Determine if the class already exists.
     *
     * @param  string  $rawName
     * @return bool
     */
    protected function alreadyExists($rawName)
    {
        return $this->files->exists($this->getPath($this->qualifyClass($rawName)));
    }

    /**
     * Get the destination class path.
     *
     * @param  string  $name
     * @return string
     */
    protected function getPath($name)
    {
        $name = Str::replaceFirst($this->rootNamespace(), '', $name);

        return $this->laravel['path'].'/'.str_replace('\\', '/', $name).'.php';
    }

    /**
     * Build the directory for the class if necessary.
     *
     * @param  string  $path
     * @return string
     */
    protected function makeDirectory($path)
    {
        if (! $this->files->isDirectory(dirname($path))) {
            $this->files->makeDirectory(dirname($path), 0777, true, true);
        }

        return $path;
    }

    /**
     * Build the class with the given name.
     *
     * @param  string  $name
     * @return string
     */
    protected function buildClass($name)
    {
        $stub = $this->files->get($this->getStub());

        return $this->replaceNamespace($stub, $name)->replaceClass($stub, $name);
    }

    /**
     * Replace the namespace for the given stub.
     *
     * @param  string  $stub
     * @param  string  $name
     * @return $this
     */
    protected function replaceNamespace(&$stub, $name)
    {
        $stub = str_replace(
            ['DummyNamespace', 'DummyRootNamespace', 'NamespacedDummyUserModel'],
            [$this->getNamespace($name), $this->rootNamespace(), config('auth.providers.users.model')],
            $stub
        );

        return $this;
    }

    /**
     * Get the full namespace for a given class, without the class name.
     *
     * @param  string  $name
     * @return string
     */
    protected function getNamespace($name)
    {
        return trim(implode('\\', array_slice(explode('\\', $name), 0, -1)), '\\');
    }

    /**
     * Replace the class name for the given stub.
     *
     * @param  string  $stub
     * @param  string  $name
     * @return string
     */
    protected function replaceClass($stub, $name)
    {
        $class = str_replace($this->getNamespace($name).'\\', '', $name);

        return str_replace('DummyClass', $class, $stub);
    }

    /**
     * Get the desired class name from the input.
     *
     * @return string
     */
    protected function getNameInput()
    {
        return trim($this->argument('name'));
    }

    /**
     * Get the root namespace for the class.
     *
     * @return string
     */
    protected function rootNamespace()
    {
        return $this->laravel->getNamespace();
    }

    /**
     * Get the console command arguments.
     *
     * @return array
     */
    protected function getArguments()
    {
        return [
            ['name', InputArgument::REQUIRED, 'The name of the class'],
        ];
    }
}
