<?php

// Plugin System - manages global and page-level plugins

class PluginManager {
    private array $loadedPlugins = [];
    private array $globalPlugins = [];
    
    public function loadGlobalPlugins(array $config): void {
        if (!isset($config['plugins']['enabled'])) return;
        
        $plugins = array_map('trim', explode(',', $config['plugins']['enabled']));
        foreach ($plugins as $pluginName) {
            if (!empty($pluginName)) {
                $this->loadPlugin($pluginName, 'global');
            }
        }
    }
    
    public function loadPagePlugins(?array $metadata): void {
        if (!$metadata || !isset($metadata['plugins'])) return;
        
        $plugins = array_map('trim', explode(',', $metadata['plugins']));
        foreach ($plugins as $pluginName) {
            if (!empty($pluginName)) {
                $this->loadPlugin($pluginName, 'page');
            }
        }
    }
    
    private function loadPlugin(string $pluginName, string $scope): bool {
        if (isset($this->loadedPlugins[$pluginName])) return true;
        
        $pluginName = basename($pluginName);
        
        $customPluginPath = __DIR__ . "/../custom/plugins/{$scope}/{$pluginName}.php";
        $appPluginPath = __DIR__ . "/plugins/{$scope}/{$pluginName}.php";
        
        $pluginPath = file_exists($customPluginPath) ? $customPluginPath 
            : (file_exists($appPluginPath) ? $appPluginPath : null);
        
        if (!$pluginPath) {
            error_log("Plugin not found: {$pluginName} (scope: {$scope})");
            return false;
        }
        
        require_once $pluginPath;
        
        $this->loadedPlugins[$pluginName] = [
            'path' => $pluginPath,
            'scope' => $scope,
            'loaded_at' => microtime(true)
        ];
        
        if ($scope === 'global') {
            $this->globalPlugins[] = $pluginName;
        }
        
        return true;
    }
    
    public function getLoadedPlugins(): array {
        return array_keys($this->loadedPlugins);
    }
    
    public function getGlobalPlugins(): array {
        return $this->globalPlugins;
    }
    
    public function isLoaded(string $pluginName): bool {
        return isset($this->loadedPlugins[$pluginName]);
    }
    
    public function getPluginInfo(string $pluginName): ?array {
        return $this->loadedPlugins[$pluginName] ?? null;
    }
}

$GLOBALS['pluginManager'] = new PluginManager();

function getPluginManager(): PluginManager {
    return $GLOBALS['pluginManager'];
}