<?php

declare(strict_types = 1);

namespace Fgm\Drupal\Composer;

use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputDefinition;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;

/**
 * Build the build- and run-time settings for all sites in the multisite.
 *
 * @package Fgm\Drupal\Composer
 */
class BuildSettingsCommand extends BaseBuilderCommand {

  /**
   * Machine name of current building process.
   */
  const BUILD_NAME = 'settings';

  /**
   * The event triggering this command.
   *
   * @var string
   */
  protected $eventName;

  /**
   * Configures the current command.
   */
  public function configure() {
    parent::configure();
    $this->eventName = $this->getName();
    $this
      ->setName('build:settings')
      ->setDescription('Step 4: build the *.settings.local.php files.')
      ->setDefinition(
        new InputDefinition([
          new InputArgument(static::ARG_FILE, InputArgument::OPTIONAL, '', static::BUILD_NAME),
        ])
      )
      ->setHelp(
        <<<EOT
The build:settings command combines shared and per-environment parameters and passes
them to the settings.local.php.twig template to build the settings/(build|run).settings.local.php files.

EOT
      );
  }

  /**
   * Executes the current command.
   *
   * {@inheritDoc}
   */
  public function execute(InputInterface $input, OutputInterface $output): int {
    [$wrapper, $params, $msg, $err] = $this->prepare($input, $output, static::BUILD_NAME);
    if ($err != 0) {
      $output->writeln($msg);
      return $err;
    }

    foreach ($params['sites'] as $name => $siteParams) {
      foreach (['build', 'run'] as $stage) {
        $stageSettings = MergeParamsCommand::mergeDeepArray([
          $siteParams['settings']['both'] ?? [],
          $siteParams['settings'][$stage] ?? [],
        ]);
        $stageParams = $siteParams;
        $stageParams['settings'] = $stageSettings;
        $context = [
          'extra' => array_diff_key($params, ['instance' => 0, 'sites' => 0]),
          'instance' => $params['instance'],
          'name' => $name,
          'stage' => $stage,
          'site' => $stageParams,
        ];
        $destination = "web/sites/${context['name']}/${context['stage']}.settings.local.php";
        echo "Building $destination\n";
        [$msg, $error] = $this->render($wrapper, $context, $destination);
        if ($error) {
          $output->writeln(sprintf("Failed rendering %s settings for site %s: %s", $stage, $name, $msg));
          return 5;
        }
      }
    }

    return 0;
  }

}