<?php

namespace App\Services;

use App\Clients\AgentClient;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Collection;
use Carbon\Carbon;

class MessageSyncService
{
    private AgentClient $agentClient;

    public function __construct(AgentClient $agentClient)
    {
        $this->agentClient = $agentClient;
    }

    /**
     * 根据消息ID列表从crmslave数据库获取消息数据
     */
    public function getMessagesByIds(array $messageIds): Collection
    {
        if (empty($messageIds)) {
            return collect();
        }

        try {
            $messages = DB::connection('crmslave')
                ->table('system_publish_event')
                ->whereIn('msg_id', $messageIds)
                ->select([
                    'msg_id',
                    'event_type',
                    'trace_id',
                    'event_param',
                    'event_property',
                    'timestamp'
                ])
                ->get();

            return $messages->map(function ($message) {
                return [
                    'msg_id' => $message->msg_id,
                    'event_type' => $message->event_type,
                    'trace_id' => $message->trace_id,
                    'event_param' => $message->event_param,
                    'event_property' => $message->event_property,
                    'timestamp' => $message->timestamp,
                    'parsed_param' => $this->parseJsonField($message->event_param),
                    'parsed_property' => $this->parseJsonField($message->event_property),
                ];
            });
        } catch (\Exception $e) {
            throw new \RuntimeException('从crmslave数据库获取消息失败: ' . $e->getMessage());
        }
    }

    /**
     * 批量同步消息到agent
     */
    public function syncMessages(array $messageIds): array
    {
        $messages = $this->getMessagesByIds($messageIds);
        $results = [];

        foreach ($messages as $message) {
            $result = $this->syncSingleMessage($message);
            $results[] = [
                'msg_id' => $message['msg_id'],
                'success' => $result['success'],
                'response' => $result['response'] ?? null,
                'error' => $result['error'] ?? null,
                'request_data' => $result['request_data'] ?? null,
            ];
        }

        return $results;
    }

    /**
     * 同步单个消息到agent
     */
    private function syncSingleMessage(array $message): array
    {
        try {
            $requestData = $this->buildAgentRequest($message);

            $response = $this->agentClient->dispatchMessage($requestData);

            if ($response->successful()) {
                return [
                    'success' => true,
                    'response' => $response->json(),
                    'request_data' => $requestData,
                ];
            } else {
                return [
                    'success' => false,
                    'error' => 'HTTP ' . $response->status() . ': ' . $response->body(),
                    'request_data' => $requestData,
                ];
            }
        } catch (\Exception $e) {
            return [
                'success' => false,
                'error' => '请求失败: ' . $e->getMessage(),
                'request_data' => $requestData ?? null,
            ];
        }
    }

    /**
     * 构建agent接口请求数据
     */
    private function buildAgentRequest(array $message): array
    {
        $parsedParam = $message['parsed_param'];
        $parsedProperty = $message['parsed_property'];

        return [
            'topic_name' => $message['event_type'],
            'msg_body' => [
                'id' => $message['msg_id'],
                'data' => $parsedParam,
                'timestamp' => $message['timestamp'],
                'property' => $parsedProperty,
            ],
            'target_service' => [1], // 默认目标服务
            'trace_id' => $message['trace_id'],
        ];
    }

    /**
     * 解析JSON字段
     */
    private function parseJsonField(?string $jsonString): mixed
    {
        if (empty($jsonString)) {
            return null;
        }

        try {
            return json_decode($jsonString, true);
        } catch (\Exception $e) {
            return $jsonString; // 如果解析失败，返回原始字符串
        }
    }

    /**
     * 验证消息ID格式
     */
    public function validateMessageIds(array $messageIds): array
    {
        $errors = [];
        
        foreach ($messageIds as $index => $messageId) {
            if (empty($messageId)) {
                $errors[] = "第 " . ($index + 1) . " 行: 消息ID不能为空";
                continue;
            }
            
            if (!is_string($messageId) && !is_numeric($messageId)) {
                $errors[] = "第 " . ($index + 1) . " 行: 消息ID格式无效";
                continue;
            }
            
            // 可以添加更多的格式验证规则
        }
        
        return $errors;
    }

    /**
     * 获取消息统计信息
     */
    public function getMessageStats(array $messageIds): array
    {
        $messages = $this->getMessagesByIds($messageIds);
        
        $stats = [
            'total_requested' => count($messageIds),
            'total_found' => $messages->count(),
            'total_missing' => count($messageIds) - $messages->count(),
            'event_types' => $messages->groupBy('event_type')->map->count(),
            'missing_ids' => array_diff($messageIds, $messages->pluck('msg_id')->toArray()),
        ];
        
        return $stats;
    }
}