<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Dotenv\Command;

use Symfony\Component\Console\Attribute\AsCommand;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\DependencyInjection\Attribute\Autoconfigure;
use Symfony\Component\Dotenv\Dotenv;

/**
 * A console command to compile .env files into a PHP-optimized file called .env.local.php.
 *
 * To use this command, first register it explicitly as a service, e.g in your services.yaml file:
 *
 *     ```yaml
 *     services:
 *         # [...]
 *         Symfony\Component\Dotenv\Command\DotenvDumpCommand: ~
 *     ```
 */
#[Autoconfigure(bind: ['$projectDir' => '%kernel.project_dir%', '$defaultEnv' => '%kernel.environment%'])]
#[AsCommand(name: 'dotenv:dump', description: 'Compile .env files to .env.local.php')]
final class DotenvDumpCommand extends Command
{
    public function __construct(
        private string $projectDir,
        private ?string $defaultEnv = null,
    ) {
        parent::__construct();
    }

    protected function configure(): void
    {
        $this
            ->setDefinition([
                new InputArgument('env', null === $this->defaultEnv ? InputArgument::REQUIRED : InputArgument::OPTIONAL, 'The application environment to dump .env files for - e.g. "prod".'),
            ])
            ->addOption('empty', null, InputOption::VALUE_NONE, 'Ignore the content of .env files')
            ->setHelp(<<<'EOT'
                The <info>%command.name%</info> command compiles .env files into a PHP-optimized file called .env.local.php.

                    <info>%command.full_name%</info>
                EOT
            )
        ;
    }

    protected function execute(InputInterface $input, OutputInterface $output): int
    {
        $config = [];
        $dotenvPath = $this->getDotenvPath($config);

        $env = $input->getArgument('env') ?? $this->defaultEnv;
        $envKey = $config['env_var_name'] ?? 'APP_ENV';

        if ($input->getOption('empty')) {
            $vars = [$envKey => $env];
        } else {
            $vars = $this->loadEnv($dotenvPath, $env, $config);
            $env = $vars[$envKey];
        }

        $vars = var_export($vars, true);
        $vars = <<<EOF
            <?php

            // This file was generated by running "php bin/console dotenv:dump $env"

            return $vars;

            EOF;
        file_put_contents($dotenvPath.'.local.php', $vars, \LOCK_EX);

        $output->writeln(\sprintf('Successfully dumped %s files in <info>%1$s.local.php</> for the <info>%s</> environment.', basename($dotenvPath), $env));

        return 0;
    }

    private function getDotenvPath(array &$config): string
    {
        $config = [];
        $projectDir = $this->projectDir;

        if (is_file($projectDir)) {
            $config = ['dotenv_path' => basename($projectDir)];
            $projectDir = \dirname($projectDir);
        }

        $composerFile = $projectDir.'/composer.json';
        $config += $_SERVER['APP_RUNTIME_OPTIONS'] ?? (is_file($composerFile) ? json_decode(file_get_contents($composerFile), true) : [])['extra']['runtime'] ?? [];

        return $projectDir.'/'.($config['dotenv_path'] ?? '.env');
    }

    private function loadEnv(string $dotenvPath, string $env, array $config): array
    {
        $envKey = $config['env_var_name'] ?? 'APP_ENV';
        $testEnvs = $config['test_envs'] ?? ['test'];

        $dotenv = new Dotenv($envKey);

        $globalsBackup = [$_SERVER, $_ENV];
        unset($_SERVER[$envKey]);
        $_ENV = [$envKey => $env];
        $_SERVER['SYMFONY_DOTENV_VARS'] = implode(',', array_keys($_SERVER));

        try {
            $dotenv->loadEnv($dotenvPath, null, 'dev', $testEnvs);
            unset($_ENV['SYMFONY_DOTENV_VARS']);
            unset($_ENV['SYMFONY_DOTENV_PATH']);

            return $_ENV;
        } finally {
            [$_SERVER, $_ENV] = $globalsBackup;
        }
    }
}
