<?php namespace Illuminate\Foundation\Console;

use Boris\Boris;
use Illuminate\Console\Command;

class TinkerCommand extends Command
{

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

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = "Interact with your application";

    /**
     * Execute the console command.
     *
     * @return void
     */
    public function fire()
    {
        if ($this->supportsBoris()) {
            $this->runBorisShell();
        } else {
            $this->comment('Full REPL not supported. Falling back to simple shell.');

            $this->runPlainShell();
        }
    }

    /**
     * Run the Boris REPL with the current context.
     *
     * @return void
     */
    protected function runBorisShell()
    {
        $this->setupBorisErrorHandling();

        (new Boris('> '))->start();
    }

    /**
     * Setup the Boris exception handling.
     *
     * @return void
     */
    protected function setupBorisErrorHandling()
    {
        restore_error_handler();
        restore_exception_handler();

        $this->laravel->make('artisan')->setCatchExceptions(false);

        $this->laravel->error(function () {
            return '';
        });
    }


    public function dump($obj, $ext = 0)
    {
        if ($ext == 1) {
            $extends = get_parent_class($obj)
                ? ':<comment>' . get_parent_class($obj) . '</comment>'
                : '';
            $this->output->writeln('class(<info>' . print_r($obj, 1) . '</info>)' . $extends . "\n");
        } elseif ($ext == 2) {
            $this->output->writeln('function(<info>' . print_r($obj, 1) . "</info>)\n");
        } else {
            if (!is_object($obj)) {
                var_dump($obj);
            } else {
                ob_start();
                var_dump($obj);
                $objectId = preg_replace('~.+#(\d+).+~s', '$1', ob_get_clean());
                $this->output->writeln('object(<info>' . get_class($obj) . '</info>#' . $objectId . ")\n");
            }
        }

    }

    /**
     * Run the plain Artisan tinker shell.
     *
     * @return void
     */
    protected function runPlainShell()
    {
        $input = $this->prompt();

        while ($input != 'quit') {
            $input = preg_replace('/\becho\b/is', '', $input);
            if (!trim($input)) {
                $input = $this->prompt();
                continue;
            }

            if ($input == 'reload') {
                passthru('php ' . base_path('artisan') . ' tinker');
                die;
            } elseif ($input == 'new') {
                system('start php ' . base_path('artisan') . ' tinker');
                $input = $this->prompt();
                continue;
            }

            // We will wrap the execution of the command in a try / catch block so we
            // can easily display the errors in a convenient way instead of having
            // them bubble back out to the CLI and stop the entire command loop.
            try {
                eval('$query = ' . $input . '; $this->dump($query);');
            } catch (\Exception $e) {
                if (class_exists(trim($input))) {
                    $input = '"' . str_replace('"', '\"', trim($input)) . '"';
                    eval('$query = ' . $input . '; $this->dump($query, 1);');
                } elseif (function_exists(trim($input))) {
                    $input = '"' . str_replace('"', '\"', trim($input)) . '"';
                    eval('$query = ' . $input . '; $this->dump($query, 2);');
                } else {
                    $this->error($e->getMessage());
                }
            }
            $input = $this->prompt();
        }
    }

    /**
     * Prompt the developer for a command.
     *
     * @return string
     */
    protected function prompt()
    {
        $dialog = $this->getHelperSet()->get('dialog');

        return $dialog->ask($this->output, "<info>></info>", null);
    }

    /**
     * Determine if the current environment supports Boris.
     *
     * @return bool
     */
    protected function supportsBoris()
    {
        return extension_loaded('readline') && extension_loaded('posix') && extension_loaded('pcntl');
    }

}