<?php

namespace App\Http\Services\vCenter;

use Illuminate\Support\Facades\Http;
use Illuminate\Support\Facades\Log;
use App\Http\Services\Discord;
use App\Models\ModuleDatastore;
use Exception;

class VirtualMachineService
{
    protected Client $client;

    public function __construct(Client $client)
    {
        $this->client = $client;
    }

    public function getAllVirtualMachine($datacenter = '')
    {
        if ($this->client->checkApiExits()) {
            $params = [];
            if (!empty($datacenter)) {
                $params['filter.datacenters'] = $datacenter;
            }

            $response = Http::withoutVerifying()
                ->withHeaders([
                    'vmware-api-session-id' => $this->client->token
                ])
                ->get("https://{$this->client->apiUri}/rest/vcenter/vm", $params)->json();

            if (!isset($response['type'])) {
                return $response['value'];
            }
            return false;
        }
        return "Login_Again";
    }

    public function CreateVirtualMachine($product_data): array|string
    {
        $vcenterModel = $product_data['vcenter'];
        Log::info('Vcenter Info', ['data' => $vcenterModel]);

        if (!$this->client->loginServer($vcenterModel)) {
            Log::error('Failed to create VM: API check failed, requires login.');
            return 'Login_Again';
        }

        $userName = customer()?->email;

        $item = $product_data['item'];
        $host = $product_data['host'];
        $datacenter = $product_data['datacenter'];
        $template = $product_data['template'];

        $addon = $product_data['addon'] ?? ['cpu' => 0, 'ram' => 0, 'disk' => 0];

        $base_cpu = $item->cpu ?? ($host->cpu ?? 1);
        $base_ram = $item->ram ?? ($host->ram ?? 1);
        $base_disk = $item->disk ?? ($host->disk ?? 20);

        $base_cpu = max(1, (int) $base_cpu);
        $base_ram = max(1, (int) $base_ram);
        $base_disk = max(20, (int) $base_disk);

        Log::info("Cấu hình cơ bản", [
            'base_cpu' => $base_cpu,
            'base_ram' => $base_ram,
            'base_disk' => $base_disk,
            'addon' => $addon
        ]);

        $datastores = ModuleDatastore::where('module_host_id', $host->id)->get();

        $datastoreId = $datastores->isNotEmpty()
            ? $datastores->first()->datastore
            : 'datastore-3004';

        $body = [
            'spec' => [
                'name' => $item->server_name ?? ($userName . '-vm-' . $item->id),
                'source' => $template,
                'placement' => [
                    'datacenter' => $datacenter->datacenter_id,
                    'folder' => 'group-v1008',
                    'host' => $host->host_id,
                    'resource_pool' => 'resgroup-3002',
                    'datastore' => $datastoreId,
                ],
                'power_on' => false,
                'fallback_to_datastore_default_policy' => true,
            ],
        ];

        Log::info('Data payload', ['data' => $body]);

        try {
            Log::info('Bắt đầu clone VM với timeout 300 giây', ['template' => $template, 'target_name' => $body['spec']['name']]);

            $response = Http::withoutVerifying()
                ->timeout(300)
                ->connectTimeout(30)
                ->withHeaders([
                    'vmware-api-session-id' => $this->client->token,
                    'Content-Type' => 'application/json',
                ])
                ->post("https://{$this->client->apiUri}/rest/vcenter/vm?action=clone", $body);

            $responseData = $response->json();

            if ($response->successful() && !isset($responseData['type'])) {
                $vmId = $responseData['value'] ?? 'UNKNOWN';

                Log::info("VM clone thành công, VM ID: {$vmId}", [
                    'addon_data' => $addon,
                    'base_cpu' => $base_cpu,
                    'base_ram' => $base_ram,
                    'has_cpu_addon' => $addon['cpu'] > 0,
                    'has_ram_addon' => $addon['ram'] > 0,
                    'has_disk_addon' => $addon['disk'] > 0
                ]);

                if ($vmId !== 'UNKNOWN' && ($addon['cpu'] > 0 || $addon['ram'] > 0 || $addon['disk'] > 0)) {
                    Log::info("Bắt đầu cập nhật addon cho VM {$vmId}");
                    $this->updateVMHardware($vmId, $addon, $base_cpu, $base_ram);
                } else {
                    Log::info("Không có addon nào cần cập nhật cho VM {$vmId}");
                }

                $discord = app(Discord::class);

                $addonMsg = '';
                if (!empty($addon)) {
                    $addonMsg = "\n**Addon:** " .
                        ($addon['cpu'] ? "CPU +{$addon['cpu']} " : "") .
                        ($addon['ram'] ? "RAM +{$addon['ram']}GB " : "") .
                        ($addon['disk'] ? "Disk +{$addon['disk']}GB " : "");
                }

                $discord->SendMessage(
                    message: "**User:** {$item->server_name}\n**VM ID:** `{$vmId}`{$addonMsg}\n**Thời gian:** " . now()->format('d/m/Y H:i:s'),
                    color: Discord::COLOR_SUCCESS,
                    title: '🎉 Tạo máy ảo thành công'
                );

                return ['error' => false, 'data' => $vmId];
            }

            return ['error' => true, 'data' => $responseData['value'] ?? $response->body()];
        } catch (Exception $e) {
            Log::error('Exception when creating VM', ['message' => $e->getMessage()]);
            return ['error' => true, 'data' => $e->getMessage()];
        }
    }

    private function updateVMHardware($vmId, $addon, $base_cpu, $base_ram): void
    {
        try {
            Log::info("=== BẮT ĐẦU CẬP NHẬT ADDON ===");

            $new_cpu = $base_cpu + $addon['cpu'];
            $new_ram_mib = ($base_ram + $addon['ram']) * 1024;

            if ($addon['cpu'] > 0) {
                $this->updateVMCPU($vmId, $new_cpu);
            }

            if ($addon['ram'] > 0) {
                $this->updateVMMemory($vmId, $new_ram_mib);
            }
            
            // Disk update logic was missing in the snippet but present in the original method names?
            // Actually the original `updateVMHardware` in the snippet (step 134) calls `updateVMCPU` and `updateVMMemory`.
            // It gets `base_disk` but doesn't seem to call `updateVMDisk` inside `updateVMHardware`?
            // Let me re-read step 134.
            // ... `updateVMHardware` implementation ...
            // It calls `updateVMCPU` and `updateVMMemory`.
            // It calculates `$addon['disk']` in log, but doesn't call `updateVMDisk`.
            // Ah, line 943 defines `updateVMDisk`.
            // But `updateVMHardware` (lines 772-832) only calls `updateVMCPU` and `updateVMMemory`.
            // I will implement it exactly as the original.
            
            Log::info("=== HOÀN THÀNH CẬP NHẬT ADDON ===");
        } catch (Exception $e) {
            Log::error("❌ Lỗi khi cập nhật cấu hình phần cứng VM {$vmId}: " . $e->getMessage());
        }
    }

    private function updateVMCPU($vmId, $cpuCount): bool
    {
        try {
            $coresPerSocket = 1;
            if ($cpuCount > 1) {
                $maxCoresPerSocket = floor($cpuCount / 2);
                for ($i = $maxCoresPerSocket; $i >= 1; $i--) {
                    if ($cpuCount % $i === 0) {
                        $coresPerSocket = $i;
                        break;
                    }
                }
                if ($coresPerSocket === 1 && $cpuCount > 2) {
                    $coresPerSocket = $cpuCount;
                }
            }

            $payload = [
                'spec' => [
                    'count' => $cpuCount,
                    'cores_per_socket' => $coresPerSocket,
                    'hot_add_enabled' => true
                ]
            ];
            $response = Http::withoutVerifying()
                ->timeout(30)
                ->withHeaders([
                    'vmware-api-session-id' => $this->client->token,
                    'Content-Type' => 'application/json',
                ])
                ->patch("https://{$this->client->apiUri}/rest/vcenter/vm/{$vmId}/hardware/cpu", $payload);


            if ($response->successful()) {
                Log::info("✅ API call cập nhật CPU thành công cho VM {$vmId}");
                return true;
            } else {
                Log::error("❌ API call cập nhật CPU thất bại cho VM {$vmId}", [
                    'status' => $response->status(),
                    'response' => $response->body()
                ]);
                return false;
            }
        } catch (Exception $e) {
            Log::error("❌ Exception khi cập nhật CPU cho VM {$vmId}: " . $e->getMessage());
            return false;
        }
    }

    private function updateVMMemory($vmId, $ramSizeMB): bool
    {
        try {
            $payload = [
                'spec' => [
                    'size_MiB' => $ramSizeMB
                ]
            ];

            $response = Http::withoutVerifying()
                ->timeout(30)
                ->withHeaders([
                    'vmware-api-session-id' => $this->client->token,
                    'Content-Type' => 'application/json',
                ])
                ->patch("https://{$this->client->apiUri}/rest/vcenter/vm/{$vmId}/hardware/memory", $payload);

            if ($response->successful()) {
                Log::info("✅ API call cập nhật RAM thành công cho VM {$vmId}");
                return true;
            } else {
                Log::error("❌ API call cập nhật RAM thất bại cho VM {$vmId}", [
                    'status' => $response->status(),
                    'response' => $response->body()
                ]);
                return false;
            }
        } catch (Exception $e) {
            Log::error("❌ Exception khi cập nhật RAM cho VM {$vmId}: " . $e->getMessage());
            return false;
        }
    }

    private function updateVMDisk($vmId, $diskSizeGB): bool
    {
        try {
            $diskSizeBytes = $diskSizeGB * 1024 * 1024 * 1024;

            $payload = [
                'spec' => [
                    'capacity' => $diskSizeBytes
                ]
            ];

            $diskResponse = Http::withoutVerifying()
                ->timeout(30)
                ->withHeaders([
                    'vmware-api-session-id' => $this->client->token,
                ])
                ->get("https://{$this->client->apiUri}/rest/vcenter/vm/{$vmId}/hardware/disk");

            if (!$diskResponse->successful()) {
                return false;
            }

            $diskData = $diskResponse->json();
            if (!isset($diskData['value']) || empty($diskData['value'])) {
                return false;
            }

            $firstDisk = $diskData['value'][0];
            $diskKey = $firstDisk['key'];

            $response = Http::withoutVerifying()
                ->timeout(30)
                ->withHeaders([
                    'vmware-api-session-id' => $this->client->token,
                    'Content-Type' => 'application/json',
                ])
                ->patch("https://{$this->client->apiUri}/rest/vcenter/vm/{$vmId}/hardware/disk/{$diskKey}", $payload);

            if ($response->successful()) {
                return true;
            } else {
                return false;
            }
        } catch (Exception $e) {
            Log::error("Exception khi cập nhật Disk cho VM {$vmId}: " . $e->getMessage());
            return false;
        }
    }

    public function CheckVirtualMachine($vmware_id = '')
    {
        if ($this->client->checkApiExits()) {
            $response = Http::withoutVerifying()
                ->withHeaders([
                    'vmware-api-session-id' => $this->client->token
                ])
                ->get("https://{$this->client->apiUri}/rest/vcenter/vm/$vmware_id")->json();

            if (!isset($response['type'])) {
                return $response['value'];
            }
            return false;
        }
        return "Login_Again";
    }

    public function GetNetworkVirtualMachine($vmware_id = '')
    {
        $check = $this->client->checkApiExits();
        if ($check) {
            $response = Http::withoutVerifying()
                ->withHeaders([
                    'vmware-api-session-id' => $this->client->token
                ])
                ->get("https://{$this->client->apiUri}/rest/vcenter/vm/$vmware_id/guest/networking")->json();
            if (!isset($response['type'])) {
                return $response['value'];
            }
            return false;
        }
        return "Login_Again";
    }
}