<?php

namespace App\Jobs\VirtualMachine\Create;

use App\Http\Facade\SignRSA;
use App\Http\Services\Telegram;
use App\Http\Services\vCenter;
use App\Jobs\Mail\Customer\VMCreationFailedJob;
use App\Jobs\VirtualMachine\Create\AssignIPJob;
use App\Jobs\VirtualMachine\Create\ConfigCLICommand;
use App\Models\OrderItem;
use App\Models\Os;
use App\Models\ModuleVmware;
use App\Models\ModuleIpAddress;
use App\Models\IpPool;
use App\Models\Log as CustomerLog;
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\Facades\Http;

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

    public OrderItem $item;
    public bool $isRetry = false;

    /**
     * Create a new job instance.
     */
    public function __construct(OrderItem $item, bool $isRetry = false)
    {
        $this->item = $item;
        $this->isRetry = $isRetry;
    }

    /**
     * Execute the job.
     */
    public function handle(vCenter $vCenter, Telegram $telegram)
    {
        try {
            $product = $this->item->getProductAttribute();

            if (!$product) {
                $errorMessage = "Không tìm thấy sản phẩm từ OrderItem #{$this->item->id}";
                Log::warning($errorMessage);
                $telegram->SendErrorMessage($errorMessage, 'CreateVirtualMachineJob - Missing Product');

                if (!$this->isRetry) {
                    $this->sendFailureNotification($errorMessage);
                    $this->writeCustomerFailureLog($errorMessage);
                }
                return false;
            }

            $osModel = Os::with('osGroup.host.datacenter.vcenter')->find($this->item->os_id);

            if (!$osModel) {
                $errorMessage = "Không tìm thấy OS id={$this->item->os_id} trong OrderItem #{$this->item->id}. os_id không hợp lệ.";
                Log::error($errorMessage);
                $telegram->SendErrorMessage([
                    'error' => $errorMessage,
                    'os_id' => $this->item->os_id,
                    'order_item_id' => $this->item->id,
                    'product_id' => $product->id,
                ], 'CreateVirtualMachineJob - Invalid OS ID');
                if (!$this->isRetry) {
                    $this->sendFailureNotification($errorMessage);
                    $this->writeCustomerFailureLog($errorMessage);
                }
                return;
            }

            $template = $osModel->template_id;
            $host = $osModel->osGroup?->host; // từ os_group.module_host_id
            $datacenter = $host?->datacenter;
            $vcenter = $datacenter?->vcenter;

            if (!$vcenter || !$host || !$datacenter) {
                $errorMessage = "Thiếu thông tin host/datacenter/vcenter từ sản phẩm ID #{$product->id}";
                Log::error($errorMessage);
                $telegram->SendErrorMessage([
                    'error' => $errorMessage,
                    'product_id' => $product->id,
                    'order_item_id' => $this->item->id,
                    'host_id' => $host?->id,
                    'datacenter_id' => $datacenter?->id,
                    'vcenter_id' => $vcenter?->id
                ], 'CreateVirtualMachineJob - Missing Infrastructure');

                if (!$this->isRetry) {
                    $this->sendFailureNotification($errorMessage);
                    $this->writeCustomerFailureLog($errorMessage);
                }
                return;
            }

            // Login to vCenter
            if (!$vCenter->loginServer($vcenter)) {
                $errorMessage = "Login vào vCenter thất bại với host: {$vcenter->host}";
                Log::error($errorMessage);
                $telegram->SendErrorMessage([
                    'error' => $errorMessage,
                    'vcenter_host' => $vcenter->host,
                    'vcenter_user' => $vcenter->user,
                    'product_id' => $product->id,
                    'order_item_id' => $this->item->id
                ], 'CreateVirtualMachineJob - vCenter Login Failed');

                if (!$this->isRetry) {
                    $this->sendFailureNotification($errorMessage);
                    $this->writeCustomerFailureLog($errorMessage);
                }
                return false;
            }

            // Lấy thông tin addon (CPU, RAM)
            $addonData = [
                'cpu' => 0,
                'ram' => 0,
                'disk' => 0
            ];

            // Lấy addon từ order item
            if ($this->item->addons) {
                foreach ($this->item->addons as $orderAddon) {
                    $addon = $orderAddon->addonItems;
                    if (!$addon)
                        continue;

                    $addonName = strtolower(trim($addon->name));
                    $quantity = (int) $orderAddon->qty;

                    switch ($addonName) {
                        case 'cpu':
                            $addonData['cpu'] += $quantity;
                            break;
                        case 'ram':
                            $addonData['ram'] += $quantity;
                            break;
                        case 'disk':
                        case 'ssd':
                            $addonData['disk'] += $quantity;
                            break;
                    }
                }
            }

            $result = $vCenter->CreateVirtualMachine([
                'item' => $this->item,
                'host' => $host,
                'datacenter' => $datacenter,
                'vcenter' => $vcenter,
                'template' => $template,
                'addon' => $addonData,
            ]);

            if (is_array($result) && ($result['error'] ?? false)) {
                $errorMessage = 'Tạo máy ảo thất bại: ' . json_encode($result);
                Log::warning($errorMessage);
                $telegram->SendErrorMessage([
                    'error' => $result['error'] ?? 'Unknown error',
                    'result' => $result,
                    'product_id' => $product->id,
                    'order_item_id' => $this->item->id,
                    'host_name' => $host?->name,
                    'datacenter_name' => $datacenter?->name,
                    'vcenter_host' => $vcenter?->host
                ], 'CreateVirtualMachineJob - VM Creation Failed');

                if (!$this->isRetry) {
                    $this->sendFailureNotification($errorMessage);
                    $this->writeCustomerFailureLog($errorMessage);
                }
                return false;
            } elseif ($result === 'Login_Again') {
                $errorMessage = 'Tạo máy ảo thất bại: cần đăng nhập lại.';
                Log::error($errorMessage);
                $telegram->SendErrorMessage([
                    'error' => $errorMessage,
                    'product_id' => $product->id,
                    'order_item_id' => $this->item->id,
                    'vcenter_host' => $vcenter?->host
                ], 'CreateVirtualMachineJob - vCenter Re-login Required');

                if (!$this->isRetry) {
                    $this->sendFailureNotification($errorMessage);
                    $this->writeCustomerFailureLog($errorMessage);
                }
                return false;
            } else {
                Log::info('Tạo máy ảo thành công: ' . json_encode($result));

                // Lấy vm_id từ kết quả
                $vmId = is_array($result) ? ($result['data'] ?? 'unknown') : $result;

                if ($vmId !== 'unknown' && $vmId !== 'UNKNOWN') {
                    try {
                        // Lưu vm_id vào bảng invoice
                        $invoice = \App\Models\Invoice::where('order_id', $this->item->order->id)->first();
                        if ($invoice) {
                            $invoice->update(['vm_id' => $vmId]);
                        }

                        // Start VM ngay sau khi tạo thành công (sử dụng API trực tiếp)
                        $startResult = $this->startVirtualMachineDirectly($vCenter, $vmId);

                        if (is_array($startResult) && $startResult['error'] === false) {
                            // Dispatch ConfigCLICommand để cấu hình VM và lấy password
                            $configJob = new ConfigCLICommand($vmId, $this->item, $vCenter);
                            dispatch($configJob)->delay(now()->addMinutes(2)); // Chờ 2 phút để VM boot hoàn toàn
                        }

                        // Lưu dữ liệu VM vào database
                        try {
                            $customer = $this->item->order->customer;
                            $serverName = $this->item->server_name ?? 'VM-' . $vmId;

                            $networkId = $product->ipAddress?->module_network_id ?? 1;
                            $availableIP = $this->getAvailableIPFromPool($networkId);

                            $moduleIpAddress = ModuleIpAddress::create([
                                'vm_name' => $serverName,
                                'module_host_id' => $host->id,
                                'module_network_id' => $networkId,
                                'ip' => $availableIP,
                                'gateway' => $product->ipAddress?->gateway ?? '0.0.0.0',
                                'netmask' => $product->ipAddress?->netmask ?? '255.255.255.0',
                                'dns' => $product->ipAddress?->dns ?? '8.8.8.8',
                                'status' => 1 // 1 = Assigned
                            ]);

                            $moduleVmware = ModuleVmware::create([
                                'name' => $serverName,
                                'module_ip_address_id' => $moduleIpAddress->id,
                                'port' => 22,
                                'order_id' => $this->item->order->id,
                                'first_payment' => $this->item->order->first_payment ?? 0,
                                'next_payment' => $this->item->order->next_payment ?? 0,
                                'next_due_date' => $this->item->order->next_due_date ?? null,
                                'next_invoice' => $this->item->order->next_invoice ?? 0,
                                'user' => 'Administrator',
                                'password' => '',
                                'hostname' => $serverName,
                                'vmware_id' => $vmId,
                                'os_id' => $this->item->os_id ?? 1,
                                'customer_id' => $customer->id,
                                'status' => 1
                            ]);

                            AssignIPJob::dispatch($vmId, $moduleVmware->id, $moduleIpAddress->ip)
                                ->delay(now()->addMinutes(5));
                        } catch (\Exception $e) {
                            Log::error('❌ Lỗi khi lưu dữ liệu VM và IP address: ' . $e->getMessage(), [
                                'vmware_id' => $vmId,
                                'order_item_id' => $this->item->id,
                                'error' => $e->getMessage()
                            ]);
                        }

                    } catch (\Exception $e) {
                        Log::error('❌ Lỗi khi lưu dữ liệu VM hoặc start VM: ' . $e->getMessage(), [
                            'vm_id' => $vmId,
                            'order_id' => $this->item->order->id,
                            'trace' => $e->getTraceAsString()
                        ]);
                    }
                }

                $telegram->SendJobRunInfo(
                    'CreateVirtualMachineJob',
                    'success',
                    [
                        'product_id' => $product->id,
                        'order_item_id' => $this->item->id,
                        'result' => $result,
                        'addon_applied' => !empty($addonData) && array_sum($addonData) > 0,
                        'vm_id_saved' => $vmId !== 'unknown' && $vmId !== 'UNKNOWN',
                        'vm_started' => isset($startResult) && is_array($startResult) && $startResult['error'] === false
                    ]
                );
                $this->writeCustomerSuccessLog();
                return true;
            }

        } catch (\Throwable $e) {
            $errorMessage = 'Lỗi khi tạo máy ảo (Job): ' . $e->getMessage();
            Log::error($errorMessage, [
                'exception' => $e,
                'order_item_id' => $this->item->id,
                'trace' => $e->getTraceAsString()
            ]);

            $telegram->SendErrorMessage([
                'error' => $e->getMessage(),
                'file' => $e->getFile(),
                'line' => $e->getLine(),
                'order_item_id' => $this->item->id,
                'trace' => substr($e->getTraceAsString(), 0, 500) // Giới hạn độ dài trace
            ], 'CreateVirtualMachineJob - Exception');

            if (!$this->isRetry) {
                $this->sendFailureNotification($errorMessage);
                $this->writeCustomerFailureLog($errorMessage);
            }
            return false;
        }
    }

    private function writeCustomerSuccessLog(): void
    {
        try {
            $order = $this->item->order;
            $customer = $order?->customer;

            if (!$order || !$customer) {
                return;
            }

            CustomerLog::create([
                'agent' => 'system',
                'client_ip' => null,
                'customer_id' => $customer->id,
                'description' => 'Khởi tạo dịch vụ thành công cho đơn hàng #' . $order->order_num
                    . ' (product_id: ' . $this->item->product_id . ', os_id: ' . $this->item->os_id . ').',
            ]);
        } catch (\Throwable $e) {
            Log::warning('Không thể ghi log thành công khởi tạo VM: ' . $e->getMessage());
        }
    }

    private function writeCustomerFailureLog(string $errorMessage): void
    {
        try {
            $order = $this->item->order;
            $customer = $order?->customer;

            if (!$order || !$customer) {
                return;
            }

            CustomerLog::create([
                'agent' => 'system',
                'client_ip' => null,
                'customer_id' => $customer->id,
                'description' => 'Khởi tạo dịch vụ thất bại cho đơn hàng #' . $order->order_num
                    . ' (product_id: ' . $this->item->product_id . ', os_id: ' . $this->item->os_id . ').'
                    . ' Lỗi: ' . $errorMessage . '. '
                    . 'Nếu có lỗi xảy ra khi khởi tạo dịch vụ quý khách nhấn khởi tạo tại đây, hoặc quý khách có thể liên hệ với kỹ thuật support@tgs.com.vn',
            ]);
        } catch (\Throwable $e) {
            Log::warning('Không thể ghi log thất bại khởi tạo VM: ' . $e->getMessage());
        }
    }

    private function getAvailableIPFromPool(int $networkId): string
    {
        // Lấy tất cả IP từ IPPool theo network_id, order by ip_address
        $ipPoolList = IpPool::where('module_network_id', $networkId)
            ->orderBy('ip_address')
            ->get();

        if ($ipPoolList->isEmpty()) {
            // Nếu không có IP trong pool, trả về IP default
            return '0.0.0.0';
        }

        $assignedIPs = ModuleIpAddress::where('module_network_id', $networkId)
            ->pluck('ip')
            ->toArray();

        foreach ($ipPoolList as $ipPool) {
            if (!in_array($ipPool->ip_address, $assignedIPs)) {
                return $ipPool->ip_address;
            }
        }
        return '0.0.0.0';
    }

    /**
     * Start VM directly using vCenter API
     */
    private function startVirtualMachineDirectly(vCenter $vCenter, string $vmId): array|string
    {
        try {
            // Kiểm tra xem đã có session chưa
            $check = $vCenter->checkApiExits();
            if (!$check) {
                return 'Login_Again';
            }

            // Gọi API start VM trực tiếp
            $response = Http::withoutVerifying()
                ->withHeaders([
                    'vmware-api-session-id' => $vCenter->token
                ])
                ->post("https://{$vCenter->apiUri}/rest/vcenter/vm/{$vmId}/power/start");

            if ($response->status() === 200) {
                return [
                    'error' => false,
                    'data' => 'success'
                ];
            }

            return [
                'error' => true,
                'data' => $response->body()
            ];
        } catch (\Exception $e) {
            Log::error('Lỗi khi start VM: ' . $e->getMessage());
            return [
                'error' => true,
                'data' => $e->getMessage()
            ];
        }
    }


    /**
     * Send failure notification to customer
     */
    private function sendFailureNotification(string $errorMessage): void
    {
        try {
            $customer = $this->item->order->customer;
            $product = $this->item->getProductAttribute();

            VMCreationFailedJob::dispatch([
                'customer_email' => $customer->email,
                'customer_name' => trim($customer->firstname . ' ' . $customer->lastname),
                'product_name' => $product?->name ?? 'Unknown Product',
                'order_id' => $this->item->order->id,
                'order_num' => $this->item->order->order_num,
                'error_message' => $errorMessage,
                'order_item_id' => $this->item->id
            ]);
        } catch (\Throwable $e) {
            Log::error('Không thể gửi email thông báo lỗi VM: ' . $e->getMessage());
        }
    }
}