<?php

namespace addon\aikefu\event;

use addon\aikefu\model\Conversation as KefuConversationModel;
use addon\aikefu\model\Message as KefuMessageModel;

/**
 * 清除客服会话历史
 */
class KefuClearConversation
{
    /**
     * 处理清除会话历史事件
     * @param array $data 事件数据
     * @return array
     */
    public function handle($data)
    {
        try {
            $conversation_id = $data['conversation_id'] ?? '';
            $user_id = $data['user_id'] ?? '';
            $site_id = $data['site_id'] ?? 0;

            // 验证参数
            if (empty($conversation_id) && empty($user_id)) {
                return [
                    'code' => -1,
                    'message' => '会话ID或用户ID不能为空',
                    'data' => []
                ];
            }

            $conversation_model = new KefuConversationModel();
            $message_model = new KefuMessageModel();

            $deleted_messages = 0;
            $deleted_conversations = 0;

            if (!empty($conversation_id)) {
                // 删除指定会话的消息和会话记录
                
                // 先删除该会话的所有消息
                $message_condition = [
                    ['site_id', '=', $site_id],
                    ['conversation_id', '=', $conversation_id]
                ];
                
                $message_result = $message_model->deleteMessage($message_condition);
                if ($message_result['code'] >= 0) {
                    $deleted_messages = $message_result['data']['result'] ?? 0;
                }
                
                // 再删除会话记录
                $conversation_condition = [
                    ['site_id', '=', $site_id],
                    ['conversation_id', '=', $conversation_id]
                ];
                
                $conversation_result = $conversation_model->deleteConversation($conversation_condition);
                if ($conversation_result['code'] >= 0) {
                    $deleted_conversations = $conversation_result['data']['result'] ?? 0;
                }
                
            } else if (!empty($user_id)) {
                // 删除指定用户的所有会话和消息
                
                // 先获取该用户的所有会话ID
                $conversation_list = $conversation_model->getConversationList([
                    ['site_id', '=', $site_id],
                    ['user_id', '=', $user_id]
                ], 'conversation_id');
                
                $conversation_ids = array_column($conversation_list['data'], 'conversation_id');
                
                if (!empty($conversation_ids)) {
                    // 删除所有会话的消息
                    $message_condition = [
                        ['site_id', '=', $site_id],
                        ['conversation_id', 'in', $conversation_ids]
                    ];
                    
                    $message_result = $message_model->deleteMessage($message_condition);
                    if ($message_result['code'] >= 0) {
                        $deleted_messages = $message_result['data']['result'] ?? 0;
                    }
                    
                    // 删除所有会话记录
                    $conversation_condition = [
                        ['site_id', '=', $site_id],
                        ['user_id', '=', $user_id]
                    ];
                    
                    $conversation_result = $conversation_model->deleteConversation($conversation_condition);
                    if ($conversation_result['code'] >= 0) {
                        $deleted_conversations = $conversation_result['data']['result'] ?? 0;
                    }
                }
            }

            return [
                'code' => 0,
                'message' => '清除成功',
                'data' => [
                    'deleted_messages' => $deleted_messages,
                    'deleted_conversations' => $deleted_conversations
                ]
            ];
            
        } catch (\Exception $e) {
            return [
                'code' => -1,
                'message' => '清除失败：' . $e->getMessage(),
                'data' => []
            ];
        }
    }
}