<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Log;
use Minishlink\WebPush\WebPush;
use Minishlink\WebPush\Subscription;

/**
 * Web Push后台管理控制器
 */
class WebPushController extends Controller
{
    /**
     * 订阅列表页面
     */
    public function subscriptions(Request $request)
    {
        $query = DB::table('QPAccountsDB.dbo.WebPushSubscriptions');

        // 筛选条件
        if ($platform = $request->input('platform')) {
            $query->where('Platform', $platform);
        }
        if ($channel = $request->input('channel')) {
            $query->where('Channel', $channel);
        }
        if ($installed = $request->input('installed')) {
            $query->where('Installed', $installed);
        }
        if ($status = $request->input('status', 1)) {
            $query->where('Status', $status);
        }
        if ($userid = $request->input('userid')) {
            $query->where('UserID', $userid);
        }

        $list = $query->orderBy('ID', 'desc')->paginate(20);

        // 统计数据
        $stats = [
            'total' => DB::table('QPAccountsDB.dbo.WebPushSubscriptions')->where('Status', 1)->count(),
            'android' => DB::table('QPAccountsDB.dbo.WebPushSubscriptions')->where('Status', 1)->where('Platform', 'Android')->count(),
            'ios' => DB::table('QPAccountsDB.dbo.WebPushSubscriptions')->where('Status', 1)->where('Platform', 'iOS')->count(),
            'installed' => DB::table('QPAccountsDB.dbo.WebPushSubscriptions')->where('Status', 1)->where('Installed', 1)->count(),
            'today' => DB::table('QPAccountsDB.dbo.WebPushSubscriptions')
                ->where('Status', 1)
                ->whereRaw('CONVERT(date, CreatedAt) = CONVERT(date, GETDATE())')
                ->count(),
        ];

        return view('admin.webpush.subscriptions', [
            'list' => $list,
            'stats' => $stats,
            'platform' => $request->input('platform', ''),
            'channel' => $request->input('channel', ''),
            'installed' => $request->input('installed', ''),
            'status' => $request->input('status', '1'),
            'userid' => $request->input('userid', ''),
        ]);
    }

    /**
     * 广播列表页面
     */
    public function broadcasts(Request $request)
    {
        $query = DB::table('QPAccountsDB.dbo.WebPushBroadcasts');

        if ($status = $request->input('status')) {
            $query->where('Status', $status);
        }

        $list = $query->orderBy('ID', 'desc')->paginate(20);

        return view('admin.webpush.broadcasts', [
            'list' => $list,
            'status' => $request->input('status', ''),
        ]);
    }

    /**
     * 创建广播页面
     */
    public function createBroadcast()
    {
        // 获取可选的渠道列表
        $channels = DB::table('QPAccountsDB.dbo.WebPushSubscriptions')
            ->select('Channel')
            ->where('Status', 1)
            ->distinct()
            ->pluck('Channel');

        return view('admin.webpush.create_broadcast', [
            'channels' => $channels,
        ]);
    }

    /**
     * 保存广播
     */
    public function storeBroadcast(Request $request)
    {
        $request->validate([
            'title' => 'required|max:255',
            'body' => 'required',
        ]);

        try {
            $title = $request->input('title');
            $body = $request->input('body');
            $url = $request->input('url', '');
            $icon = $request->input('icon', '');
            $image = $request->input('image', '');
            $targetType = $request->input('target_type', 'all');
            $targetValue = $request->input('target_value', []);
            $filterInstalled = $request->input('filter_installed');
            $sendNow = $request->input('send_now', false);

            // 计算目标数量
            $query = DB::table('QPAccountsDB.dbo.WebPushSubscriptions')
                ->where('Status', 1);

            if ($targetType === 'channel' && !empty($targetValue)) {
                $query->whereIn('Channel', $targetValue);
            } elseif ($targetType === 'platform' && !empty($targetValue)) {
                $query->whereIn('Platform', $targetValue);
            }

            if ($filterInstalled !== null && $filterInstalled !== '') {
                $query->where('Installed', $filterInstalled);
            }

            $totalCount = $query->count();

            if ($totalCount === 0) {
                return redirect()->back()->with('error', '没有找到符合条件的订阅用户');
            }

            // 创建广播记录
            $broadcastId = DB::table('QPAccountsDB.dbo.WebPushBroadcasts')->insertGetId([
                'Title' => $title,
                'Body' => $body,
                'Icon' => $icon,
                'Image' => $image,
                'URL' => $url,
                'TargetType' => $targetType,
                'TargetValue' => json_encode($targetValue),
                'FilterInstalled' => $filterInstalled,
                'Status' => $sendNow ? 'processing' : 'pending',
                'TotalCount' => $totalCount,
                'CreatedBy' => session('admin_user')['nickname'] ?? 'Admin',
                'CreatedAt' => date('Y-m-d H:i:s'),
                'UpdatedAt' => date('Y-m-d H:i:s')
            ]);

            // 如果立即发送
            if ($sendNow) {
                $this->processBroadcast($broadcastId);
                return redirect()->route('admin.webpush.broadcasts')->with('success', "广播已发送,ID: {$broadcastId}, 目标用户: {$totalCount}");
            }

            return redirect()->route('admin.webpush.broadcasts')->with('success', "广播已创建,ID: {$broadcastId}, 目标用户: {$totalCount}");

        } catch (\Exception $e) {
            Log::error('Create broadcast error: ' . $e->getMessage());
            return redirect()->back()->with('error', '创建失败: ' . $e->getMessage());
        }
    }

    /**
     * 发送广播
     */
    public function sendBroadcast($id)
    {
        $broadcast = DB::table('QPAccountsDB.dbo.WebPushBroadcasts')
            ->where('ID', $id)
            ->first();

        if (!$broadcast) {
            return redirect()->back()->with('error', '广播不存在');
        }

        if ($broadcast->Status === 'completed') {
            return redirect()->back()->with('error', '该广播已发送');
        }

        $result = $this->processBroadcast($id);

        if ($result['success']) {
            return redirect()->back()->with('success', $result['message']);
        } else {
            return redirect()->back()->with('error', $result['message']);
        }
    }

    /**
     * 禁用订阅
     */
    public function disableSubscription($id)
    {
        DB::table('QPAccountsDB.dbo.WebPushSubscriptions')
            ->where('ID', $id)
            ->update(['Status' => 0, 'UpdatedAt' => date('Y-m-d H:i:s')]);

        return redirect()->back()->with('success', '订阅已禁用');
    }

    /**
     * 删除订阅
     */
    public function deleteSubscription($id)
    {
        DB::table('QPAccountsDB.dbo.WebPushSubscriptions')
            ->where('ID', $id)
            ->delete();

        return redirect()->back()->with('success', '订阅已删除');
    }

    /**
     * 发送日志
     */
    public function sendLogs(Request $request)
    {
        $broadcastId = $request->input('broadcast_id');

        $query = DB::table('QPAccountsDB.dbo.WebPushSendLogs as wps')
            ->leftJoin('QPAccountsDB.dbo.WebPushSubscriptions as sub', 'wps.SubscriptionID', '=', 'sub.ID')
            ->select('wps.*', 'sub.UserID', 'sub.FPID', 'sub.Platform');

        if ($broadcastId) {
            $query->where('wps.BroadcastID', $broadcastId);
        }

        $list = $query->orderBy('wps.ID', 'desc')->paginate(50);

        return view('admin.webpush.send_logs', [
            'list' => $list,
            'broadcast_id' => $broadcastId ?? '',
        ]);
    }

    /**
     * 处理广播发送(核心逻辑)
     */
    private function processBroadcast($broadcastId)
    {
        try {
            $broadcast = DB::table('QPAccountsDB.dbo.WebPushBroadcasts')
                ->where('ID', $broadcastId)
                ->first();

            if (!$broadcast) {
                return ['success' => false, 'message' => '广播不存在'];
            }

            // 更新状态为处理中
            DB::table('QPAccountsDB.dbo.WebPushBroadcasts')
                ->where('ID', $broadcastId)
                ->update([
                    'Status' => 'processing',
                    'SentAt' => date('Y-m-d H:i:s'),
                    'UpdatedAt' => date('Y-m-d H:i:s')
                ]);

            // 获取目标订阅
            $query = DB::table('QPAccountsDB.dbo.WebPushSubscriptions')
                ->where('Status', 1);

            if ($broadcast->TargetType === 'channel') {
                $channels = json_decode($broadcast->TargetValue, true);
                $query->whereIn('Channel', $channels);
            } elseif ($broadcast->TargetType === 'platform') {
                $platforms = json_decode($broadcast->TargetValue, true);
                $query->whereIn('Platform', $platforms);
            }

            if ($broadcast->FilterInstalled !== null) {
                $query->where('Installed', $broadcast->FilterInstalled);
            }

            $subscriptions = $query->get();

            // Web Push配置
            $auth = [
                'VAPID' => [
                    'subject' => env('VAPID_SUBJECT', 'mailto:admin@example.com'),
                    'publicKey' => env('VAPID_PUBLIC_KEY', ''),
                    'privateKey' => env('VAPID_PRIVATE_KEY', ''),
                ]
            ];

            $webPush = new WebPush($auth);

            // 准备推送数据
            $payload = json_encode([
                'title' => $broadcast->Title,
                'body' => $broadcast->Body,
                'icon' => $broadcast->Icon,
                'image' => $broadcast->Image,
                'url' => $broadcast->URL,
                'tag' => 'broadcast-' . $broadcastId,
                'requireInteraction' => false
            ]);

            $successCount = 0;
            $failedCount = 0;

            // 批量发送
            foreach ($subscriptions as $sub) {
                try {
                    $subscriptionInfo = json_decode($sub->SubscriptionInfo, true);

                    $subscription = Subscription::create([
                        'endpoint' => $subscriptionInfo['endpoint'],
                        'keys' => $subscriptionInfo['keys'] ?? []
                    ]);

                    $webPush->queueNotification($subscription, $payload);

                } catch (\Exception $e) {
                    Log::error("Queue notification error for subscription {$sub->ID}: " . $e->getMessage());
                }
            }

            // 发送所有排队的通知
            foreach ($webPush->flush() as $report) {
                $endpoint = $report->getEndpoint();

                $subscription = collect($subscriptions)->first(function ($sub) use ($endpoint) {
                    return $sub->Endpoint === $endpoint;
                });

                if ($subscription) {
                    if ($report->isSuccess()) {
                        $successCount++;
                        $status = 'success';
                        $errorMsg = null;

                        // 更新订阅的推送统计
                        DB::table('QPAccountsDB.dbo.WebPushSubscriptions')
                            ->where('ID', $subscription->ID)
                            ->update([
                                'LastPushAt' => date('Y-m-d H:i:s'),
                                'PushCount' => DB::raw('PushCount + 1')
                            ]);
                    } else {
                        $failedCount++;
                        $status = 'failed';
                        $errorMsg = $report->getReason();

                        // 如果订阅已失效,禁用它
                        if (in_array($report->getStatusCode(), [404, 410])) {
                            DB::table('QPAccountsDB.dbo.WebPushSubscriptions')
                                ->where('ID', $subscription->ID)
                                ->update(['Status' => 0]);
                        }
                    }

                    // 记录发送日志
                    DB::table('QPAccountsDB.dbo.WebPushSendLogs')->insert([
                        'BroadcastID' => $broadcastId,
                        'SubscriptionID' => $subscription->ID,
                        'Status' => $status,
                        'ErrorMsg' => $errorMsg,
                        'SentAt' => date('Y-m-d H:i:s')
                    ]);
                }
            }

            // 更新广播状态
            DB::table('QPAccountsDB.dbo.WebPushBroadcasts')
                ->where('ID', $broadcastId)
                ->update([
                    'Status' => 'completed',
                    'SuccessCount' => $successCount,
                    'FailedCount' => $failedCount,
                    'UpdatedAt' => date('Y-m-d H:i:s')
                ]);

            return [
                'success' => true,
                'message' => "推送完成! 成功: {$successCount}, 失败: {$failedCount}"
            ];

        } catch (\Exception $e) {
            Log::error("Process broadcast error: " . $e->getMessage());

            DB::table('QPAccountsDB.dbo.WebPushBroadcasts')
                ->where('ID', $broadcastId)
                ->update([
                    'Status' => 'failed',
                    'UpdatedAt' => date('Y-m-d H:i:s')
                ]);

            return ['success' => false, 'message' => '发送失败: ' . $e->getMessage()];
        }
    }
}