<?php

namespace App\Module\OpenAPI\Commands;

use App\Module\OpenAPI\Models\OpenApiLog;
use App\Module\OpenAPI\Models\OpenApiRateLimit;
use App\Module\OpenAPI\Models\OpenApiStats;
use App\Module\OpenAPI\Services\RateLimitService;
use Illuminate\Console\Command;
use Carbon\Carbon;

/**
 * 清理OpenAPI数据命令
 */
class CleanDataCommand extends Command
{
    /**
     * 命令签名
     *
     * @var string
     */
    protected $signature = 'openapi:clean-data 
                            {--logs=30 : 保留日志天数}
                            {--rate-limits=7 : 保留限流记录天数}
                            {--stats=365 : 保留统计数据天数}
                            {--dry-run : 仅显示将要删除的数据，不实际删除}
                            {--force : 强制删除，不询问确认}';

    /**
     * 命令描述
     *
     * @var string
     */
    protected $description = '清理OpenAPI过期数据';

    protected RateLimitService $rateLimitService;

    /**
     * 构造函数
     *
     * @param RateLimitService $rateLimitService
     */
    public function __construct(RateLimitService $rateLimitService)
    {
        parent::__construct();
        $this->rateLimitService = $rateLimitService;
    }

    /**
     * 执行命令
     *
     * @return int
     */
    public function handle(): int
    {
        $logsDays = (int)$this->option('logs');
        $rateLimitDays = (int)$this->option('rate-limits');
        $statsDays = (int)$this->option('stats');
        $dryRun = $this->option('dry-run');
        $force = $this->option('force');

        $this->info('OpenAPI数据清理工具');
        $this->line('');

        // 显示清理计划
        $this->table(['数据类型', '保留天数', '清理日期之前'], [
            ['API调用日志', $logsDays, Carbon::now()->subDays($logsDays)->toDateString()],
            ['限流记录', $rateLimitDays, Carbon::now()->subDays($rateLimitDays)->toDateString()],
            ['统计数据', $statsDays, Carbon::now()->subDays($statsDays)->toDateString()],
        ]);

        if ($dryRun) {
            $this->warn('这是一次试运行，不会实际删除数据');
        }

        // 统计将要删除的数据
        $logsCount = $this->getExpiredLogsCount($logsDays);
        $rateLimitsCount = $this->getExpiredRateLimitsCount($rateLimitDays);
        $statsCount = $this->getExpiredStatsCount($statsDays);

        $this->line('');
        $this->info('将要清理的数据统计:');
        $this->table(['数据类型', '记录数'], [
            ['API调用日志', number_format($logsCount)],
            ['限流记录', number_format($rateLimitsCount)],
            ['统计数据', number_format($statsCount)],
        ]);

        if ($logsCount === 0 && $rateLimitsCount === 0 && $statsCount === 0) {
            $this->info('没有需要清理的数据');
            return 0;
        }

        // 确认删除
        if (!$dryRun && !$force) {
            if (!$this->confirm('确定要删除这些数据吗？此操作不可恢复！')) {
                $this->info('操作已取消');
                return 0;
            }
        }

        $this->line('');
        $this->info('开始清理数据...');

        $totalDeleted = 0;

        // 清理API调用日志
        if ($logsCount > 0) {
            $deleted = $this->cleanLogs($logsDays, $dryRun);
            $totalDeleted += $deleted;
            $this->line("✓ 清理API调用日志: " . number_format($deleted) . " 条记录");
        }

        // 清理限流记录
        if ($rateLimitsCount > 0) {
            $deleted = $this->cleanRateLimits($rateLimitDays, $dryRun);
            $totalDeleted += $deleted;
            $this->line("✓ 清理限流记录: " . number_format($deleted) . " 条记录");
        }

        // 清理统计数据
        if ($statsCount > 0) {
            $deleted = $this->cleanStats($statsDays, $dryRun);
            $totalDeleted += $deleted;
            $this->line("✓ 清理统计数据: " . number_format($deleted) . " 条记录");
        }

        $this->line('');
        if ($dryRun) {
            $this->info("试运行完成，共计将删除 " . number_format($totalDeleted) . " 条记录");
        } else {
            $this->info("数据清理完成，共删除 " . number_format($totalDeleted) . " 条记录");
        }

        return 0;
    }

    /**
     * 获取过期日志数量
     *
     * @param int $days
     * @return int
     */
    protected function getExpiredLogsCount(int $days): int
    {
        $cutoffDate = Carbon::now()->subDays($days);
        return OpenApiLog::where('created_at', '<', $cutoffDate)->count();
    }

    /**
     * 获取过期限流记录数量
     *
     * @param int $days
     * @return int
     */
    protected function getExpiredRateLimitsCount(int $days): int
    {
        $cutoffDate = Carbon::now()->subDays($days);
        return OpenApiRateLimit::where('created_at', '<', $cutoffDate)->count();
    }

    /**
     * 获取过期统计数据数量
     *
     * @param int $days
     * @return int
     */
    protected function getExpiredStatsCount(int $days): int
    {
        $cutoffDate = Carbon::now()->subDays($days);
        return OpenApiStats::where('created_at', '<', $cutoffDate)->count();
    }

    /**
     * 清理API调用日志
     *
     * @param int $days
     * @param bool $dryRun
     * @return int
     */
    protected function cleanLogs(int $days, bool $dryRun): int
    {
        $cutoffDate = Carbon::now()->subDays($days);
        
        if ($dryRun) {
            return OpenApiLog::where('created_at', '<', $cutoffDate)->count();
        }

        $deleted = 0;
        $batchSize = 1000;

        // 分批删除，避免内存溢出
        do {
            $deletedBatch = OpenApiLog::where('created_at', '<', $cutoffDate)
                ->limit($batchSize)
                ->delete();
            
            $deleted += $deletedBatch;
            
            if ($deletedBatch > 0) {
                $this->line("  已删除 {$deleted} 条日志记录...");
            }
            
        } while ($deletedBatch > 0);

        return $deleted;
    }

    /**
     * 清理限流记录
     *
     * @param int $days
     * @param bool $dryRun
     * @return int
     */
    protected function cleanRateLimits(int $days, bool $dryRun): int
    {
        if ($dryRun) {
            $cutoffDate = Carbon::now()->subDays($days);
            return OpenApiRateLimit::where('created_at', '<', $cutoffDate)->count();
        }

        // 使用服务类的清理方法
        return $this->rateLimitService->cleanExpiredRecords($days);
    }

    /**
     * 清理统计数据
     *
     * @param int $days
     * @param bool $dryRun
     * @return int
     */
    protected function cleanStats(int $days, bool $dryRun): int
    {
        $cutoffDate = Carbon::now()->subDays($days);
        
        if ($dryRun) {
            return OpenApiStats::where('created_at', '<', $cutoffDate)->count();
        }

        $deleted = 0;
        $batchSize = 1000;

        // 分批删除
        do {
            $deletedBatch = OpenApiStats::where('created_at', '<', $cutoffDate)
                ->limit($batchSize)
                ->delete();
            
            $deleted += $deletedBatch;
            
            if ($deletedBatch > 0) {
                $this->line("  已删除 {$deleted} 条统计记录...");
            }
            
        } while ($deletedBatch > 0);

        return $deleted;
    }

    /**
     * 清理缓存数据
     *
     * @return void
     */
    protected function cleanCache(): void
    {
        $this->info('清理缓存数据...');
        
        // 清理限流缓存
        $pattern = 'rate_limit:*';
        $keys = \Illuminate\Support\Facades\Cache::getRedis()->keys($pattern);
        
        if (!empty($keys)) {
            \Illuminate\Support\Facades\Cache::getRedis()->del($keys);
            $this->line("✓ 清理限流缓存: " . count($keys) . " 个键");
        }

        // 清理应用缓存
        $pattern = 'openapi_app:*';
        $keys = \Illuminate\Support\Facades\Cache::getRedis()->keys($pattern);
        
        if (!empty($keys)) {
            \Illuminate\Support\Facades\Cache::getRedis()->del($keys);
            $this->line("✓ 清理应用缓存: " . count($keys) . " 个键");
        }

        // 清理权限缓存
        $pattern = 'app_scopes:*';
        $keys = \Illuminate\Support\Facades\Cache::getRedis()->keys($pattern);
        
        if (!empty($keys)) {
            \Illuminate\Support\Facades\Cache::getRedis()->del($keys);
            $this->line("✓ 清理权限缓存: " . count($keys) . " 个键");
        }
    }

    /**
     * 优化数据库表
     *
     * @return void
     */
    protected function optimizeTables(): void
    {
        $this->info('优化数据库表...');
        
        $tables = [
            'kku_openapi_logs',
            'kku_openapi_rate_limits',
            'kku_openapi_stats',
        ];

        foreach ($tables as $table) {
            try {
                \Illuminate\Support\Facades\DB::statement("OPTIMIZE TABLE {$table}");
                $this->line("✓ 优化表: {$table}");
            } catch (\Exception $e) {
                $this->warn("优化表 {$table} 失败: " . $e->getMessage());
            }
        }
    }
}