//go:build linux

package processor

import (
	"bufio"
	"fmt"
	"log"
	"os"
	"regexp"
	"strings"
)

var numberRegex *regexp.Regexp = regexp.MustCompile(`\d+`)

func getLinuxCpuInfo() (ProcessorInformation, error) {
	procFile, err := os.Open("/proc/meminfo")
	if err != nil {
		return ProcessorInformation{}, fmt.Errorf("Could not find /proc/meminfo. Are you sure you are on linux?")
	}
	defer procFile.Close()

	fileReader := bufio.NewScanner(procFile)

	//var idleTime uint64
	//var kernelTime uint64
	//var userTime uint64

	for fileReader.Scan() {
		line := fileReader.Text()

		if strings.HasPrefix(line, "cpu ") {
			fields := strings.Split(line, " ")
			for _, field := range fields {
				fmt.Print(field)
			}
		}
	}

	return ProcessorInformation{}, nil
}

func GetCPUInformation() ProcessorInformation {
	info, err := getLinuxCpuInfo()
	if err != nil {
		log.Printf("Could not read processor info. Error: %v", err)
		return ProcessorInformation{}
	}
	return info
}