<?php

namespace App\Filament\Widgets;

use App\Services\PrometheusService;
use Filament\Widgets\ChartWidget;

class CPUStatus extends ChartWidget
{
    protected static ?string $heading = 'CPU 占用率';

    protected static ?int $sort = 5;

    protected int | string | array $columnSpan = '1';

    protected function getData(): array
    {
        $prometheus = new PrometheusService();

        // 查询 CPU 使用率数据，获取最近 60 秒内的平均值
        $query = '100 - (avg by(instance) (rate(node_cpu_seconds_total{mode="idle"}[60s])) * 100)';
        $cpuUsageResult = $prometheus->query($query);

        // 计算使用率和空闲率
        $cpuUsage = 0;
        if (isset($cpuUsageResult['data']['result'][0]['value'][1])) {
            $cpuUsage = floatval($cpuUsageResult['data']['result'][0]['value'][1]);
        }
        $cpuIdle = 100 - $cpuUsage;

        $data = [
            round($cpuUsage, 2),
            round($cpuIdle, 2),
        ];

        return [
            'labels' => ['CPU 使用率', 'CPU 空闲率'],
            'datasets' => [
                [
                    'label' => 'CPU 占用情况',
                    'data' => $data,
                    'backgroundColor' => ['#FF8080', '#E0F5B9'], // 柔和颜色
                    'borderColor' => ['#FF8080', '#E0F5B9'], // 边框颜色
                    'borderWidth' => 1, // 边框宽度
                ],
            ],
        ];
    }

    protected function getType(): string
    {
        return 'pie'; // 设置为饼图
    }

    protected function getPollingInterval(): ?string
    {
        return '1s'; // 每秒更新一次
    }
}