<?php

namespace Paymenter\Extensions\Servers\Proxmox\Livewire;

use Paymenter\Extensions\Servers\Proxmox\Models\Server as ServerModel;
use Paymenter\Extensions\Servers\Proxmox\Models\ServerStatistics;
use Carbon\Carbon;
use Illuminate\Support\Facades\Cache;

class Server extends Component
{
    public function mount(ServerModel $server): void
    {
        parent::mount($server);
        
        // Check and enforce bandwidth throttling if exceeded
        $this->checkAndEnforceBandwidthLimit();
    }

    public function getMonthlyTrafficProperty()
    {
        $startOfMonth = Carbon::now()->startOfMonth();
        
        // Get the earliest and latest statistics for this month
        $firstStat = $this->server->statistics()
            ->where('DateTime', '>=', $startOfMonth)
            ->orderBy('DateTime', 'asc')
            ->first();
            
        $latestStat = $this->server->statistics()
            ->where('DateTime', '>=', $startOfMonth)
            ->orderBy('DateTime', 'desc')
            ->first();
        
        if (!$firstStat || !$latestStat) {
            return 0;
        }
        
        // Calculate total traffic (in + out) for the month
        $netinDiff = max(0, $latestStat->netin - $firstStat->netin);
        $netoutDiff = max(0, $latestStat->netout - $firstStat->netout);
        $totalBytes = $netinDiff + $netoutDiff;
        
        // Convert to GiB
        return round($totalBytes / (1024 * 1024 * 1024), 2);
    }

    public function getBandwidthThreshold95Property()
    {
        // Cache for 15 minutes to avoid recalculating for every server
        return Cache::remember('bandwidth_threshold_95_' . Carbon::now()->format('Y-m'), 15, function () {
            $startOfMonth = Carbon::now()->startOfMonth();
            
            // Get all servers
            $allServers = ServerModel::all();
            
            if ($allServers->isEmpty()) {
                return 10; // Minimum threshold of 10 GiB
            }
            
            $totalTraffic = 0;
            $serverCount = 0;
            
            foreach ($allServers as $server) {
                // Get the earliest and latest statistics for this month for each server
                $firstStat = ServerStatistics::where('server_id', $server->id)
                    ->where('DateTime', '>=', $startOfMonth)
                    ->orderBy('DateTime', 'asc')
                    ->first();
                    
                $latestStat = ServerStatistics::where('server_id', $server->id)
                    ->where('DateTime', '>=', $startOfMonth)
                    ->orderBy('DateTime', 'desc')
                    ->first();
                
                if ($firstStat && $latestStat) {
                    // Calculate total traffic (in + out) for the month
                    $netinDiff = max(0, $latestStat->netin - $firstStat->netin);
                    $netoutDiff = max(0, $latestStat->netout - $firstStat->netout);
                    $totalBytes = $netinDiff + $netoutDiff;
                    
                    // Convert to GiB and add to total
                    $totalTraffic += $totalBytes / (1024 * 1024 * 1024);
                    $serverCount++;
                }
            }
            
            if ($serverCount === 0) {
                return 10; // Minimum threshold of 10 GiB
            }
            
            // Calculate average bandwidth across all servers
            $averageBandwidth = $totalTraffic / $serverCount;
            
            // Calculate 95% of average
            $threshold95Percent = $averageBandwidth * 0.95;
            
            // Return the maximum of 95% average or 10 GiB minimum
            return round(max($threshold95Percent, 10), 2);
        });
    }

    protected function checkAndEnforceBandwidthLimit()
    {
        $monthlyTraffic = $this->monthlyTraffic;
        $threshold = $this->bandwidthThreshold95;
        
        // Check if bandwidth is exceeded
        if ($monthlyTraffic > $threshold) {
            // Throttle the server to 1 MiB/s
            $this->throttleServerBandwidth();
        }
    }

    protected function throttleServerBandwidth()
    {
        try {
            $proxmox = new \Paymenter\Extensions\Servers\Proxmox\Proxmox;
            
            // Get current VM config
            $config = $proxmox->request('/nodes/' . $this->server->node->name . '/qemu/' . $this->server->vm_id . '/config')->json()['data'];
            
            $updates = [];
            
            // Update all network interfaces to rate limit of 1 MiB/s
            foreach ($config as $key => $value) {
                if (preg_match('/^net\d+$/', $key)) {
                    // Parse existing network config
                    $parts = explode(',', $value);
                    $newParts = [];
                    $hasRate = false;
                    
                    foreach ($parts as $part) {
                        if (strpos($part, 'rate=') === 0) {
                            // Replace existing rate
                            $newParts[] = 'rate=1';
                            $hasRate = true;
                        } else {
                            $newParts[] = $part;
                        }
                    }
                    
                    // Add rate if not present
                    if (!$hasRate) {
                        $newParts[] = 'rate=1';
                    }
                    
                    $updates[$key] = implode(',', $newParts);
                }
            }
            
            // Apply the updates if any network interfaces were found
            if (!empty($updates)) {
                $proxmox->request('/nodes/' . $this->server->node->name . '/qemu/' . $this->server->vm_id . '/config', 'put', $updates);
            }
        } catch (\Throwable $e) {
            // Log the error but don't fail the page load
            \Log::error('Failed to throttle bandwidth for server ' . $this->server->id, [
                'error' => $e->getMessage(),
                'server_id' => $this->server->id,
            ]);
        }
    }

    public function render()
    {
        return view('proxmox::server');
    }

    public function placeholder(array $params = [])
    {
        return view('proxmox::serverplaceholder', $params);
    }
}