<?php

namespace App\Module\ThirdParty\Services;

use App\Module\ThirdParty\Models\ThirdPartyLog;
use App\Module\ThirdParty\Enums\LOG_LEVEL;
use Illuminate\Support\Collection;

/**
 * 第三方服务日志服务类
 */
class LogService
{
    /**
     * 创建日志记录
     *
     * @param array $data
     * @return ThirdPartyLog
     */
    public static function create(array $data): ThirdPartyLog
    {
        return ThirdPartyLog::createLog($data);
    }

    /**
     * 获取日志列表
     *
     * @param array $filters
     * @param array $options
     * @return Collection
     */
    public static function getList(array $filters = [], array $options = []): Collection
    {
        $query = ThirdPartyLog::with('service', 'credential');

        // 应用过滤条件
        if (isset($filters['service_id'])) {
            $query->where('service_id', $filters['service_id']);
        }

        if (isset($filters['credential_id'])) {
            $query->where('credential_id', $filters['credential_id']);
        }

        if (isset($filters['level'])) {
            $query->where('level', $filters['level']);
        }

        if (isset($filters['method'])) {
            $query->where('method', $filters['method']);
        }

        if (isset($filters['status_code'])) {
            $query->where('response_status', $filters['status_code']);
        }

        if (isset($filters['start_date'])) {
            $query->where('created_at', '>=', $filters['start_date']);
        }

        if (isset($filters['end_date'])) {
            $query->where('created_at', '<=', $filters['end_date']);
        }

        if (isset($filters['search'])) {
            $search = $filters['search'];
            $query->where(function ($q) use ($search) {
                $q->where('url', 'like', "%{$search}%")
                  ->orWhere('request_id', 'like', "%{$search}%")
                  ->orWhere('error_message', 'like', "%{$search}%");
            });
        }

        // 只查询错误日志
        if (isset($filters['errors_only']) && $filters['errors_only']) {
            $query->errors();
        }

        // 应用排序
        $sortBy = $options['sort_by'] ?? 'created_at';
        $sortOrder = $options['sort_order'] ?? 'desc';
        $query->orderBy($sortBy, $sortOrder);

        // 应用限制
        if (isset($options['limit'])) {
            $query->limit($options['limit']);
        }

        return $query->get();
    }

    /**
     * 获取日志详情
     *
     * @param int $logId
     * @return ThirdPartyLog
     */
    public static function getById(int $logId): ThirdPartyLog
    {
        return ThirdPartyLog::with('service', 'credential')->findOrFail($logId);
    }

    /**
     * 获取日志统计信息
     *
     * @param array $filters
     * @return array
     */
    public static function getStats(array $filters = []): array
    {
        $query = ThirdPartyLog::query();

        // 应用过滤条件
        if (isset($filters['service_id'])) {
            $query->where('service_id', $filters['service_id']);
        }

        if (isset($filters['start_date'])) {
            $query->where('created_at', '>=', $filters['start_date']);
        }

        if (isset($filters['end_date'])) {
            $query->where('created_at', '<=', $filters['end_date']);
        }

        $total = $query->count();
        $successful = $query->whereBetween('response_status', [200, 299])->count();
        $errors = $query->where('response_status', '>=', 400)->count();

        // 按级别统计
        $levelStats = $query->selectRaw('level, COUNT(*) as count')
            ->groupBy('level')
            ->pluck('count', 'level')
            ->toArray();

        // 按状态码统计
        $statusStats = $query->selectRaw('response_status, COUNT(*) as count')
            ->whereNotNull('response_status')
            ->groupBy('response_status')
            ->pluck('count', 'response_status')
            ->toArray();

        // 平均响应时间
        $avgResponseTime = $query->whereNotNull('response_time')
            ->avg('response_time');

        return [
            'total' => $total,
            'successful' => $successful,
            'errors' => $errors,
            'success_rate' => $total > 0 ? round(($successful / $total) * 100, 2) : 0,
            'avg_response_time' => $avgResponseTime ? round($avgResponseTime, 2) : null,
            'by_level' => $levelStats,
            'by_status' => $statusStats,
        ];
    }

    /**
     * 获取错误日志
     *
     * @param array $filters
     * @param int $limit
     * @return Collection
     */
    public static function getErrorLogs(array $filters = [], int $limit = 100): Collection
    {
        $filters['errors_only'] = true;
        $options = ['limit' => $limit];
        
        return static::getList($filters, $options);
    }

    /**
     * 获取慢请求日志
     *
     * @param int $threshold 响应时间阈值（毫秒）
     * @param array $filters
     * @param int $limit
     * @return Collection
     */
    public static function getSlowLogs(int $threshold = 5000, array $filters = [], int $limit = 100): Collection
    {
        $query = ThirdPartyLog::with('service', 'credential')
            ->where('response_time', '>', $threshold);

        // 应用其他过滤条件
        if (isset($filters['service_id'])) {
            $query->where('service_id', $filters['service_id']);
        }

        if (isset($filters['start_date'])) {
            $query->where('created_at', '>=', $filters['start_date']);
        }

        if (isset($filters['end_date'])) {
            $query->where('created_at', '<=', $filters['end_date']);
        }

        return $query->orderBy('response_time', 'desc')
            ->limit($limit)
            ->get();
    }

    /**
     * 清理旧日志
     *
     * @param int $days 保留天数
     * @return int 删除数量
     */
    public static function cleanup(int $days = 30): int
    {
        return ThirdPartyLog::where('created_at', '<', now()->subDays($days))->delete();
    }

    /**
     * 导出日志
     *
     * @param array $filters
     * @param string $format
     * @return array
     */
    public static function export(array $filters = [], string $format = 'array'): array
    {
        $logs = static::getList($filters);
        $exported = [];

        foreach ($logs as $log) {
            $exported[] = [
                'id' => $log->id,
                'service_name' => $log->service->name,
                'service_code' => $log->service->code,
                'request_id' => $log->request_id,
                'method' => $log->method,
                'url' => $log->url,
                'response_status' => $log->response_status,
                'response_time' => $log->response_time,
                'level' => $log->level,
                'error_message' => $log->error_message,
                'user_id' => $log->user_id,
                'ip_address' => $log->ip_address,
                'created_at' => $log->created_at->toDateTimeString(),
            ];
        }

        return $exported;
    }

    /**
     * 获取请求追踪信息
     *
     * @param string $requestId
     * @return ThirdPartyLog|null
     */
    public static function getByRequestId(string $requestId): ?ThirdPartyLog
    {
        return ThirdPartyLog::with('service', 'credential')
            ->where('request_id', $requestId)
            ->first();
    }

    /**
     * 获取用户的调用日志
     *
     * @param int $userId
     * @param array $options
     * @return Collection
     */
    public static function getUserLogs(int $userId, array $options = []): Collection
    {
        $query = ThirdPartyLog::with('service', 'credential')
            ->where('user_id', $userId);

        $limit = $options['limit'] ?? 50;
        $query->limit($limit);

        return $query->orderBy('created_at', 'desc')->get();
    }

    /**
     * 记录API调用
     *
     * @param array $data
     * @return ThirdPartyLog
     */
    public static function logApiCall(array $data): ThirdPartyLog
    {
        // 过滤敏感信息
        if (isset($data['headers'])) {
            $data['headers'] = static::filterSensitiveData($data['headers']);
        }

        if (isset($data['params'])) {
            $data['params'] = static::filterSensitiveData($data['params']);
        }

        return static::create($data);
    }

    /**
     * 过滤敏感数据
     *
     * @param array $data
     * @return array
     */
    protected static function filterSensitiveData(array $data): array
    {
        $sensitiveFields = config('thirdparty.logging.sensitive_fields', []);
        
        foreach ($sensitiveFields as $field) {
            if (isset($data[$field])) {
                $data[$field] = '***';
            }
        }
        
        return $data;
    }
}