//go:build linux

package zypper

import (
	"git.jmbit.de/jmb/patchman/client/common"
	"git.jmbit.de/jmb/patchman/client/utils"
	"log"
	"os/exec"
	"strings"
	"sync"
)

// GetInstalledList Because Zypper sadly can't give both the upgradeable and installed packages at the same time,
// concurrently get both a list of all installed packages and all upgradeable and merge them
func GetInstalledList() []common.ListPackage {
	var allPackages []common.ListPackage
	var upgradeablePackages []common.ListPackage

	var wg sync.WaitGroup
	wg.Add(2)
	go func() {
		defer wg.Done()
		allPackages = getAllPackagesList()
		log.Println("Got Zypper Package list")
	}()
	go func() {
		defer wg.Done()
		upgradeablePackages = getUpgradeableList()
		log.Println("Got Zypper upgradable Package list")
	}()
	wg.Wait()

	return utils.DedupAndMergePackageList(allPackages, upgradeablePackages)

}

func getAllPackagesList() []common.ListPackage {
	var packageList []common.ListPackage
	// List of all upgradeable packages
	cmd := exec.Command("/usr/bin/zypper", "se", "-si")
	out, err := cmd.Output()
	if err != nil {
		log.Printf("Could not get zypper packages %w", err)
	}
	// Convert Output into text and split it into newlines
	lines := strings.Split(string(out[:]), "\n")
	// Parse lines
	//TODO parallelize this
	for i, line := range lines {
		if i < 6 {
			continue
		}

		sections := strings.Split(line, "|")
		if len(sections) != 6 {
			log.Print(line)
			continue
		}
		name := strings.TrimSpace(sections[1])
		source := strings.TrimSpace(sections[5])
		version := strings.TrimSpace(sections[3])
		architecture := strings.TrimSpace(sections[4])

		listPackage := common.ListPackage{
			Name:           name,
			Source:         source,
			Version:        version,
			Architecture:   architecture,
			PackageManager: "zypper",
		}
		packageList = append(packageList, listPackage)
	}
	return packageList
}

func getUpgradeableList() []common.ListPackage {
	var packageList []common.ListPackage
	// List of all upgradeable packages
	cmd := exec.Command("/usr/bin/zypper", "list-updates", "--all")
	out, err := cmd.Output()
	if err != nil {
		log.Printf("Could not get zypper packages %w", err)
	}
	// Convert Output into text and split it into newlines
	lines := strings.Split(string(out[:]), "\n")
	// Parse lines
	//TODO parallelize this
	for i, line := range lines {
		if i < 6 {
			continue
		}

		sections := strings.Split(line, "|")

		if len(sections) != 6 {
			log.Print(line)
			continue
		}
		name := strings.TrimSpace(sections[2])
		source := strings.TrimSpace(sections[1])
		version := strings.TrimSpace(sections[3])
		upgradeableTo := strings.TrimSpace(sections[4])
		architecture := strings.TrimSpace(sections[5])

		listPackage := common.ListPackage{
			Name:           name,
			Source:         source,
			Version:        version,
			Architecture:   architecture,
			Upgradeable:    true,
			UpgradeableTo:  upgradeableTo,
			PackageManager: "zypper",
		}
		packageList = append(packageList, listPackage)
	}

	return packageList
}