<?php

declare(strict_types=1);

namespace App\Jobs\VirtualMachine;

use App\Actions\VM\ChangeIpVMAction;
use App\Http\Services\Telegram;
use App\Models\ModuleVmware;
use App\Services\VirtualMachine\VmIpReservationService;
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;

/**
 * ChangeIpVMJob
 *
 * Customer-initiated VM IP change. Runs the same ChangeIpVMAction that used
 * to execute synchronously inside VmController::changeIp — moved to a queued
 * job so the SSH → PowerCLI round trip can no longer blow past nginx/php-fpm's
 * timeout and surface as a 502.
 */
class ChangeIpVMJob implements ShouldQueue
{
    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;

    /** No auto-retry — mirrors the previous synchronous behaviour (single attempt). */
    public int $tries   = 1;
    public int $timeout = 180;

    public function __construct(
        public readonly int    $moduleVmwareId,
        public readonly string $ipAddress,
        public readonly string $gateway,
        public readonly string $osType,
        public readonly string $dns,
        public readonly string $guestUser,
        public readonly string $guestPassword,
        public readonly ?int   $newIpPoolId = null,
        public readonly ?int   $oldIpPoolId = null,
    ) {}

    public function handle(ChangeIpVMAction $action, VmIpReservationService $ipReservation): void
    {
        $vm = ModuleVmware::with([
            'vCenter',
            'ipAddress.host.datacenter.vCenter',
        ])->find($this->moduleVmwareId);

        if (!$vm) {
            Log::error('[ChangeIpVMJob] ModuleVmware not found', ['module_vmware_id' => $this->moduleVmwareId]);
            if ($this->newIpPoolId) {
                $ipReservation->releaseByPoolId($this->newIpPoolId);
            }
            return;
        }

        $raw = $action->execute(
            $vm,
            $this->ipAddress,
            $this->gateway,
            $this->osType,
            $this->dns,
            $this->guestUser,
            $this->guestPassword,
        );

        $failed = $raw === 'Login_Again'
            || $raw === 'vCenter_Not_Found'
            || str_starts_with((string) $raw, 'Error:')
            || str_contains((string) $raw, '[STDERR]');

        if ($failed) {
            if ($this->newIpPoolId) {
                $ipReservation->releaseByPoolId($this->newIpPoolId);
            }
        } else {
            $vm->update(['ip' => $this->ipAddress, 'dns' => $this->dns]);
            if ($this->oldIpPoolId) {
                $ipReservation->releaseByPoolId($this->oldIpPoolId);
            }
        }

        Log::channel('Custom')->info('[ChangeIpVMJob] raw output', [
            'module_vmware_id' => $this->moduleVmwareId,
            'ip_address'       => $this->ipAddress,
            'gateway'          => $this->gateway,
            'os_type'          => $this->osType,
            'vm_name'          => $vm->name,
            'vmware_id'        => $vm->vmware_id,
            'raw'              => $raw,
        ]);

        $telegram = new Telegram();

        if ($raw === 'Login_Again' || $raw === 'vCenter_Not_Found') {
            $errMsg = $raw === 'vCenter_Not_Found'
                ? 'Không tìm thấy vCenter cho VM này.'
                : 'Không thể đăng nhập vào vCenter.';

            $telegram->SendErrorMessage("❌ Đổi IP thất bại [{$this->osType}]\n"
                . "🖥 VM: {$vm->name} ({$vm->vmware_id})\n"
                . "📍 IP mới: {$this->ipAddress}\n"
                . "🔗 GW: {$this->gateway}\n"
                . "🚫 Lỗi: {$errMsg}");

            return;
        }

        if ($failed) {
            $telegram->SendErrorMessage("❌ Đổi IP thất bại [{$this->osType}]\n"
                . "🖥 VM: {$vm->name} ({$vm->vmware_id})\n"
                . "📍 IP mới: {$this->ipAddress}\n"
                . "🔗 GW: {$this->gateway}\n"
                . "📋 Output:\n" . mb_substr((string) $raw, 0, 800));

            return;
        }

        // Empty raw = script chạy không có output → coi là thành công (PowerShell script không echo)
        // Nhưng vẫn gửi cảnh báo để theo dõi
        if (trim((string) $raw) === '') {
            $telegram->SendMessage("⚠️ Đổi IP [{$this->osType}] - Script chạy nhưng không có output\n"
                . "🖥 VM: {$vm->name} ({$vm->vmware_id})\n"
                . "📍 IP mới: {$this->ipAddress}\n"
                . "🔗 GW: {$this->gateway}\n"
                . "ℹ️ Kiểm tra lại VM để xác nhận IP đã thay đổi chưa.");
        }
    }

    public function failed(\Throwable $e): void
    {
        Log::error('[ChangeIpVMJob] job failed with exception', [
            'module_vmware_id' => $this->moduleVmwareId,
            'ip_address'       => $this->ipAddress,
            'error'            => $e->getMessage(),
        ]);

        if ($this->newIpPoolId) {
            app(VmIpReservationService::class)->releaseByPoolId($this->newIpPoolId);
        }
    }
}