<?php

namespace Dipper\Console\Commands;

use Dipper\Console\Finder;
use Dipper\Console\Command;
use Illuminate\Support\Composer;
use Illuminate\Filesystem\Filesystem;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Finder\Finder as SymfonyFinder;
use Symfony\Component\Console\Command\Command as SymfonyCommand;

/**
 * @author HollyTeng <n.haoyuan@gmail.com>
 */
class ChangeAppNamespaceCommand extends SymfonyCommand
{
    use Finder;
    use Command;

    /**
     * The console command name.
     *
     * @var string
     */
    protected $name = 'app:name';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Set the app source directory namespace.';

    /**
     * The Composer class instance.
     *
     * @var \Illuminate\Support\Composer
     */
    protected $composer;

    /**
     * The filesystem instance.
     *
     * @var \Illuminate\Filesystem\Filesystem
     */
    protected $files;

    /**
     * Create a new key generator command.
     */
    public function __construct()
    {
        parent::__construct();

        $this->files = new Filesystem();
        $this->composer = new Composer($this->files);
    }

    /**
     * Execute the console command.
     */
    public function fire()
    {
        try {
            $this->setAppDirectoryNamespace();

            $this->setAppConfigNamespaces();

            $this->setBootstrapNamespace();

            $this->setComposerNamespace();

            $this->info('Dipper source directory namespace set!');

            $this->composer->dumpAutoloads();
        } catch (\Exception $e) {
            $this->error($e->getMessage());
        }
    }

    /**
     * Set the namespace on the files in the app directory.
     */
    protected function setAppDirectoryNamespace()
    {
        $files = SymfonyFinder::create()
                            ->in($this->findSourceRoot())
                            ->contains($this->findRootNamespace())
                            ->name('*.php');

        foreach ($files as $file) {
            $this->replaceNamespace($file->getRealPath());
        }
    }

    /**
     * Replace the App namespace at the given path.
     *
     * @param string $path
     */
    protected function replaceNamespace($path)
    {
        $search = [
            'namespace ' . $this->findRootNamespace() . ';',
            $this->findRootNamespace() . '\\',
        ];

        $replace = [
            'namespace ' . $this->argument('name') . ';',
            $this->argument('name') . '\\',
        ];

        $this->replaceIn($path, $search, $replace);
    }

    /**
     * Set the namespace in the appropriate configuration files.
     */
    protected function setAppConfigNamespaces()
    {
        $search = [
            $this->findRootNamespace() . '\\Providers',
            $this->findRootNamespace() . '\\Foundation',
            $this->findRootNamespace() . '\\Http\\Controllers\\',
        ];

        $replace = [
            $this->argument('name') . '\\Providers',
            $this->argument('name') . '\\Foundation',
            $this->argument('name') . '\\Http\\Controllers\\',
        ];

        $this->replaceIn($this->getConfigPath('app'), $search, $replace);
    }

    /**
     * Set the PSR-4 namespace in the Composer file.
     */
    protected function setComposerNamespace()
    {
        $this->replaceIn(
            $this->getComposerPath(),
            str_replace('\\', '\\\\', $this->findRootNamespace()) . '\\\\',
            str_replace('\\', '\\\\', $this->argument('name')) . '\\\\'
        );
    }

    /**
     * Set bootstrap php file namespace.
     */
    protected function setBootstrapNamespace()
    {
        $this->replaceIn(
            base_path('bootstrap/app.php'),
            [$this->findRootNamespace() . '\\'],
            [$this->argument('name') . '\\']
        );
    }

    /**
     * Replace the given string in the given file.
     *
     * @param string       $path
     * @param string|array $search
     * @param string|array $replace
     */
    protected function replaceIn($path, $search, $replace)
    {
        if ($this->files->exists($path)) {
            $this->files->put($path, str_replace($search, $replace, $this->files->get($path)));
        }
    }

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