<?php

namespace App\Jobs\VirtualMachine\Sync;

use App\Http\Services\Telegram;
use App\Http\Services\vCenter as ServiceVCenter;
use App\Models\ModuleDatacenter;
use App\Models\ModuleHost;
use App\Models\VirtualMachines;
use App\Models\vCenter;
use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Bus\Dispatchable;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Queue\SerializesModels;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Str;
use Throwable;

class SyncVirtualMachine implements ShouldQueue
{
    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;

    protected $vCenter;
    protected $telegram;

    /**
     * Create a new job instance.
     */
    public function __construct()
    {
        // Keep constructor empty or minimal to ensure lightweight serialization
    }

    /**
     * Execute the job.
     */
    public function handle()
    {
        $this->vCenter = new ServiceVCenter;
        $this->telegram = new Telegram();

        try {
            $data = vCenter::select('id', 'host', 'user', 'password', 'token')->get();

            $vCenterCount = 0;
            $vmTotalCount = 0;

            foreach ($data as $item) {
                Log::info("Processing vCenter: {$item->host}");
                $this->vCenter->apiUri = $item->host;

                // Always login to get a fresh token
                $token = $this->vCenter->loginServer($item);
                if ($token) {
                    $item->token = $token;
                    $item->save();
                    $this->vCenter->token = $token;
                } else {
                    $this->vCenter->token = null;
                    Log::error("Login failed for {$item->host}");
                }

                if (!$this->vCenter->token) {
                    continue;
                }

                $datacenters = ModuleDatacenter::where('vcenter_id', $item->id)->get();
                if ($datacenters->count() > 0) {
                    foreach ($datacenters as $dc) {
                        // Get all hosts for this datacenter
                        $hosts = ModuleHost::where('module_datacenter_id', $dc->id)->get();
                        
                        if ($hosts->count() > 0) {
                            foreach ($hosts as $host) {
                                Log::info("Fetching VMs for host: {$host->host_id} in datacenter: {$dc->name}");
                                $vms = $this->vCenter->getAllVirtualMachine($dc->datacenter_id, $host->host_id);
                                $vmCount = $this->processVMs($vms, $item, $dc->id, $host->id);
                                $vmTotalCount += $vmCount;
                            }
                        } else {
                            // Fallback: Sync VMs by datacenter only
                            Log::info("No hosts found for datacenter {$dc->name}, fetching VMs by datacenter only");
                            $vms = $this->vCenter->getAllVirtualMachine($dc->datacenter_id);
                            $vmCount = $this->processVMs($vms, $item, $dc->id, null);
                            $vmTotalCount += $vmCount;
                        }
                    }
                } else {
                    // Fallback: Sync all VMs without datacenter context
                    Log::info("No datacenters found, fetching all VMs for {$item->host}");
                    $vms = $this->vCenter->getAllVirtualMachine();
                    $vmCount = $this->processVMs($vms, $item, null, null);
                    $vmTotalCount += $vmCount;
                }

                $vCenterCount++; // Increment vCenter synced count
            }

            // Notify success via Telegram
            $this->telegram->SendJobRunInfo('SyncVirtualMachine', 'Success', [
                'message' => 'Sync VMs completed successfully',
                'synced_vcenter_count' => $vCenterCount,
                'synced_vm_count' => $vmTotalCount,
            ]);

        } catch (Throwable $e) {
            Log::error("SyncVirtualMachine Job Failed: " . $e->getMessage());
            // Gửi log lỗi qua Telegram
            if (isset($this->telegram)) {
                $this->telegram->SendJobRunInfo('SyncVirtualMachine', 'Failed', [
                    'error' => $e->getMessage(),
                    'file' => $e->getFile(),
                    'line' => $e->getLine(),
                ]);
            }
        }
    }

    private function processVMs($vms, $vCenterItem, $datacenterId, $hostId)
    {
        // If token expired, retry login (handled inside loop in previous logic, but simpler here if we just handle the array check)
        if ($vms === 'Login_Again') {
            Log::info("Token expired, retrying login for {$vCenterItem->host}");
            $token = $this->vCenter->loginServer($vCenterItem);
            if ($token) {
                $vCenterItem->token = $token;
                $vCenterItem->save();
                $this->vCenter->token = $token;
                // Retry fetch
                $datacenter = $datacenterId ? ModuleDatacenter::find($datacenterId) : null;
                $host = $hostId ? ModuleHost::find($hostId) : null;
                $vms = $this->vCenter->getAllVirtualMachine(
                    $datacenter ? $datacenter->datacenter_id : '',
                    $host ? $host->host_id : ''
                );
            }
        }

        if (!is_array($vms)) {
            Log::warning("Failed to fetch VMs or empty response. Response: " . json_encode($vms));
            return 0;
        }

        Log::info("Fetched " . count($vms) . " VMs");
        $count = 0;
        foreach ($vms as $vmData) {
            $vmObj = VirtualMachines::firstOrNew(['vm_id' => $vmData['vm']]);

            if (!$vmObj->exists) {
                $vmObj->uuid = Str::uuid();
            }

            $vmObj->name = $vmData['name'];
            $vmObj->power_state = $vmData['power_state'];
            $vmObj->cpu = $vmData['cpu_count'] ?? 0;
            $vmObj->ram_mb = $vmData['memory_size_MiB'] ?? 0;
            $vmObj->datacenter_id = $datacenterId;
            $vmObj->host_id = $hostId;
            $vmObj->folder = $vmData['folder'] ?? null;
            $vmObj->last_synced_at = now();

            $vmObj->save();
            $count++;
        }
        return $count;
    }
}