<?php

namespace App\Http\Controllers\Api\Service\Concerns;

use App\Models\VirtualMachines;
use Illuminate\Support\Carbon;
use App\Services\VmMetricsService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use RuntimeException;

trait ManagesVmMetrics
{
    public function metrics(Request $request, VmMetricsService $metricsService): JsonResponse
    {
        $productId = $request->input('product');
        if (!$productId) {
            return response()->json(['success' => false, 'message' => 'Thiếu product id.'], 422);
        }

        $vm = $this->resolveVmById($productId, $request, requireActiveService: false);
        if ($vm instanceof JsonResponse) {
            return $vm;
        }

        try {
            $inventory = VirtualMachines::where('vm_id', $vm->vmware_id)->first(['ram_mb', 'cpu']);
            $metrics = $metricsService->get((string) $vm->vmware_id, $inventory?->ram_mb, $inventory?->cpu);
        } catch (RuntimeException $exception) {
            $status = $exception->getCode() === 404 ? 404 : 502;

            return response()->json([
                'success' => false,
                'message' => $status === 404
                    ? 'Chưa có dữ liệu giám sát cho VM.'
                    : 'Không thể tải dữ liệu giám sát VM.',
            ], $status);
        }

        return response()->json(['success' => true, 'data' => $metrics]);
    }

    public function metricsHistory(Request $request, VmMetricsService $metricsService): JsonResponse
    {
        $data = $request->validate([
            'product' => 'required|string',
            'from' => 'nullable|date',
            'to' => 'nullable|date|after:from',
        ]);

        $to = isset($data['to']) ? Carbon::parse($data['to']) : now();
        $from = isset($data['from']) ? Carbon::parse($data['from']) : $to->copy()->subDay();
        if ($from->diffInDays($to) > 31) {
            return response()->json(['success' => false, 'message' => 'Chỉ xem được tối đa 31 ngày mỗi lần.'], 422);
        }

        $vm = $this->resolveVmById($data['product'], $request, requireActiveService: false);
        if ($vm instanceof JsonResponse) {
            return $vm;
        }

        try {
            $points = $metricsService->history((string) $vm->vmware_id, $from, $to);
        } catch (RuntimeException $exception) {
            $status = $exception->getCode() === 404 ? 404 : 502;

            return response()->json(['success' => false, 'message' => 'Không thể tải lịch sử giám sát VM.'], $status);
        }

        return response()->json(['success' => true, 'data' => $points]);
    }
}