<?php

namespace Modules\Stylist\Console;

use Illuminate\Console\Command;
use Illuminate\Filesystem\Filesystem;

final class CreateThemeCommand extends Command
{
    protected $signature = 'stylist:create-theme {key : Lowercase theme key} {--parent=common : Parent theme key} {--name= : Display name}';

    protected $description = 'Create a minimal child theme without copying shared views.';

    public function __construct(private readonly Filesystem $files)
    {
        parent::__construct();
    }

    public function handle(): int
    {
        $key = strtolower(trim((string) $this->argument('key')));
        if (! preg_match('/^[a-z0-9][a-z0-9_-]*$/', $key)) {
            $this->error('Theme keys may contain lowercase letters, numbers, dashes, and underscores only.');

            return self::FAILURE;
        }

        $path = rtrim((string) config('stylist.themes_path'), '/\\').DIRECTORY_SEPARATOR.$key;
        if ($this->files->exists($path)) {
            $this->error("Theme [{$key}] already exists.");

            return self::FAILURE;
        }

        $parent = trim((string) $this->option('parent'));
        $name = trim((string) ($this->option('name') ?: str($key)->headline()));
        $this->files->ensureDirectoryExists($path.'/views');

        $manifest = [
            'manifest_version' => 1,
            'name' => $name,
            'slug' => $key,
            'version' => '1.0.0',
            'description' => "Child theme for {$name}.",
            'extends' => $parent !== '' ? $parent : null,
            'entry_view' => 'home',
            'views' => true,
            'variables' => [],
            'settings' => [],
        ];

        if ($manifest['extends'] === null) {
            unset($manifest['extends']);
        }

        $this->files->put($path.'/theme.json', json_encode($manifest, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES).PHP_EOL);
        $this->files->put($path.'/views/.gitkeep', '');

        $this->info("Theme [{$key}] created at {$path}.");
        $this->line('Shared views will resolve through its parent; only add genuine overrides.');

        return self::SUCCESS;
    }
}