<?php

namespace App\Module\System\Providers;

use App\Module\System\Events\ConfigChangedEvent;
use App\Module\System\Events\SystemLogCreatedEvent;
use App\Module\System\Events\ViewConfigChangedEvent;
use App\Module\System\Listeners\SystemEventListener;
use Illuminate\Support\ServiceProvider;

/**
 * 系统模块服务提供者
 */
class SystemServiceProvider extends ServiceProvider
{
    /**
     * 事件到监听器的映射
     *
     * @var array
     */
    protected $listen = [
        ConfigChangedEvent::class => [
            SystemEventListener::class . '@handleConfigChanged',
        ],
        ViewConfigChangedEvent::class => [
            SystemEventListener::class . '@handleViewConfigChanged',
        ],
        SystemLogCreatedEvent::class => [
            SystemEventListener::class . '@handleSystemLogCreated',
        ],
    ];

    /**
     * 需要注册的订阅者
     *
     * @var array
     */
    protected $subscribe = [
        SystemEventListener::class,
    ];

    /**
     * 注册服务
     *
     * @return void
     */
    public function register(): void
    {
        // 注册服务...
        $this->app->singleton('system.config.service', function ($app) {
            return new \App\Module\System\Services\ConfigService();
        });
        
        $this->app->singleton('system.view.config.service', function ($app) {
            return new \App\Module\System\Services\ViewConfigService();
        });
        
        $this->app->singleton('system.log.service', function ($app) {
            return new \App\Module\System\Services\LogService();
        });
    }

    /**
     * 启动服务
     *
     * @return void
     */
    public function boot(): void
    {
        // 注册事件监听器
        $this->registerEvents();
    }

    /**
     * 注册事件和监听器
     *
     * @return void
     */
    protected function registerEvents(): void
    {
        $events = $this->app['events'];

        foreach ($this->listen as $event => $listeners) {
            foreach ($listeners as $listener) {
                $events->listen($event, $listener);
            }
        }

        foreach ($this->subscribe as $subscriber) {
            $events->subscribe($subscriber);
        }
    }
}