<?php

declare(strict_types=1);

namespace App\Jobs\VirtualMachine\Rebuild;

use App\Http\Services\Telegram;
use App\Jobs\Mail\Customer\VmRebuildFailedJob;
use App\Models\ModuleVmware;
use App\Models\ReinstallLog;
use App\Models\Service;
use App\Services\VirtualMachine\Rebuild\VmRebuildCloneService;
use App\Services\VirtualMachine\Rebuild\VmRebuildService;
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 Throwable;

/**
 * RebuildVirtualMachineJob
 *
 * First step of the isolated rebuild pipeline.
 *
 *   [1] Build RebuildContext from current DB state (idempotent reload).
 *   [2] Power off old VM (best-effort).
 *   [3] Clone new VM from chosen OS template.
 *   [4] Power on new VM + wait for VMware Tools.
 *   [5] Dispatch RebuildAssignIpJob with the new vSphere vm_id.
 *
 * On failure: old VM remains active, no DB references are swapped, no IP
 * change, no deletion. ReinstallLog is marked failed; service is reverted
 * to 'active' for visibility.
 */
final class RebuildVirtualMachineJob implements ShouldQueue
{
    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;

    public int $tries   = 1;
    public int $timeout = 900;

    private bool $failureHandled = false;

    public function __construct(
        public readonly int $moduleVmwareId,
        public readonly int $newOsId,
        public readonly int $reinstallLogId,
    ) {
    }

    public function handle(
        VmRebuildService $rebuildService,
        VmRebuildCloneService $cloneService,
    ): void {
        Log::info('RebuildVirtualMachineJob: start', [
            'module_vmware_id' => $this->moduleVmwareId,
            'new_os_id'        => $this->newOsId,
            'reinstall_log_id' => $this->reinstallLogId,
        ]);

        try {
            $ctx = $rebuildService->buildContext($this->moduleVmwareId, $this->newOsId);

            $this->markServiceStatus($ctx->serviceId, 'rebuilding');

            $cloneService->powerOffOldVm($ctx);

            $newVmId = $cloneService->clone($ctx);
            $ctx     = $ctx->withNewVmId($newVmId);

            $cloneService->powerOnAndWaitTools($ctx);

            $this->markLog([
                'status'        => ReinstallLog::STATUS_IN_PROGRESS,
                'new_vmware_id' => $newVmId,
                'started_at'    => now(),
            ]);

            RebuildAssignIpJob::dispatch(
                $this->moduleVmwareId,
                $this->newOsId,
                $newVmId,
                $this->reinstallLogId,
            )->onQueue('default');

            Log::info('RebuildVirtualMachineJob: completed, IP job dispatched', [
                'module_vmware_id' => $this->moduleVmwareId,
                'new_vm_id'        => $newVmId,
            ]);

            (new Telegram)->SendRebuildStepNotification($ctx->vmName, $ctx->ip, 'Clone VM mới', true);
        } catch (Throwable $e) {
            $this->onFailure($e);
            throw $e;
        }
    }

    public function failed(Throwable $e): void
    {
        $this->onFailure($e);
    }

    private function onFailure(Throwable $e): void
    {
        if ($this->failureHandled) {
            return;
        }
        $this->failureHandled = true;

        Log::error('RebuildVirtualMachineJob: failed — old VM preserved', [
            'module_vmware_id' => $this->moduleVmwareId,
            'error'            => $e->getMessage(),
        ]);

        ModuleVmware::where('id', $this->moduleVmwareId)->update(['status' => 1]);
        $service = Service::where('vm_id', $this->moduleVmwareId)->first();
        if ($service) {
            $service->update(['status' => 'active']);
        }

        $this->markLog([
            'status'        => ReinstallLog::STATUS_FAILED,
            'error_message' => $e->getMessage(),
        ]);

        $vm = ModuleVmware::with('customer')->find($this->moduleVmwareId);
        (new Telegram)->SendRebuildStepNotification(
            $vm->name ?? "VM #{$this->moduleVmwareId}",
            $vm->ip ?? '',
            'Clone VM mới',
            false,
            $e->getMessage(),
        );

        VmRebuildFailedJob::dispatch([
            'customer_email'   => $vm?->customer?->email,
            'customer_name'    => $vm?->customer?->fullname,
            'vm_name'          => $vm->name ?? "VM #{$this->moduleVmwareId}",
            'ip'               => $vm->ip ?? '',
            'module_vmware_id' => $this->moduleVmwareId,
        ]);
    }

    private function markServiceStatus(?int $serviceId, string $status): void
    {
        if ($serviceId) {
            Service::where('id', $serviceId)->update(['status' => $status]);
        }
    }

    private function markLog(array $attrs): void
    {
        ReinstallLog::where('id', $this->reinstallLogId)->update($attrs + ['updated_at' => now()]);
    }
}