package main

import (
	"fmt"
	"io"
	"net/http"
	"regexp"

	"github.com/Masterminds/semver/v3"
)

const (
	version    = "1.1.0"
	versionUrl = "https://git.burkey.co/eburk/epochcli/raw/branch/master/version.go"
)

func needUpdate() (bool, error) {
	resp, err := http.Get(versionUrl)
	if err != nil {
		return false, fmt.Errorf("unable to get version file: %v", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		return false, fmt.Errorf("failed to download update, status code: %d", resp.StatusCode)
	}

	b, err := io.ReadAll(resp.Body)
	if err != nil {
		return false, fmt.Errorf("unable to read response body: %v", err)
	}

	fmt.Println(string(b))
	re := regexp.MustCompile(`version\s+=\s+"(\d+.\d+.\d+)"`)
	ver := re.FindStringSubmatch(string(b))
	if ver[1] == "" {
		return false, fmt.Errorf("unable to parse version number")
	}

	curVer, err := semver.NewVersion(version)
	if err != nil {
		return false, fmt.Errorf("unable to parse current version to semver: %v", err)
	}

	newVer, err := semver.NewVersion(ver[1])
	if err != nil {
		return false, fmt.Errorf("unable to parse new version to semver: %v", err)
	}

	return curVer != newVer, nil
}