<?php

declare(strict_types=1);

namespace App\View\Engine;

use Hyperf\View\Engine\EngineInterface;
use Smarty;
use RuntimeException;

class SmartyEngine implements EngineInterface
{
    protected Smarty $smarty;
    protected array $shared = [];

    public function __construct()
    {
        $this->smarty = new Smarty();

        // 基础配置
        $this->smarty->setLeftDelimiter('{{');
        $this->smarty->setRightDelimiter('}}');
        $this->smarty->setCompileDir(BASE_PATH . '/runtime/smarty/compile/');
        $this->smarty->setCacheDir(BASE_PATH . '/runtime/smarty/cache/');
        $this->smarty->setTemplateDir(BASE_PATH . '/storage/view/');

        $this->ensureDirectoryExists($this->smarty->getCompileDir());
        $this->ensureDirectoryExists($this->smarty->getCacheDir());
    }

    protected function ensureDirectoryExists(string $path): void
    {
        if (!is_dir($path)) {
            mkdir($path, 0755, true);
        }
    }

    public function share(string $key, $value): void
    {
        $this->shared[$key] = $value;
    }

    public function render(string $template, array $data, array $config): string
    {
        // 合并共享变量
        $data = array_merge($this->shared, $data);

        foreach ($data as $key => $value) {
            $this->smarty->assign($key, $value);
        }

        try {
            return $this->smarty->fetch($template);
        } catch (\SmartyException $e) {
            throw new RuntimeException("Smarty render failed: " . $e->getMessage());
        }
    }
}