package main

import (
	"encoding/json"
	"fmt"
	"io/ioutil"
	"log"
	"os"
	"path/filepath"
	"strings"
)

func release_branch(b string, sDir string, tDir string, dryrun bool, v string) {
	check_sDir, _ := os.ReadDir(sDir)
	check_tDir, _ := os.ReadDir(tDir)
	var newImages bool = false
	if len(check_sDir) > 0 {
		newImages = true
	}
	sVersion := GetGluonVersion(sDir)
	tVersion := GetGluonVersion(tDir)
	//check wanted version in target
	if tVersion != v {
		log.Println("published version is outdated, try to update from source folder")
		if sVersion != v {
			log.Println("wanted Version is not availible in source folder")
			os.Exit(1)
		}
	}

	if newImages {
		// delete old firmware files in public folder
		for _, file := range check_tDir {
			if !(dryrun) {
				err := os.RemoveAll(tDir + file.Name())
				if err != nil {
					log.Println("error deleting file: ", err)
				} else {
					log.Println("removed file: ", file.Name())
				}
			} else {
				log.Println("DRYRUN: delete folder :", file.Name())
			}
		}

		//move new files to folder
		for _, file := range check_sDir {
			if !(dryrun) {
				os.Rename(sDir+file.Name(), tDir+file.Name())
				log.Println("moved file: ", file.Name())
			} else {
				log.Println("DRYRUN: move folder: ", file.Name())
			}
		}
	}
}

func GetGluonVersion(path string) string {
	image_folder := path + "sysupgrade/"
	files, err := filepath.Glob(filepath.Join(image_folder, "gluon-tdf-*"))
	if err != nil {
		fmt.Println("Error reading directory: ", err)
		os.Exit(1)
	}

	if len(files) > 0 {
		fileName := filepath.Base(files[0])
		parts := strings.Split(fileName, "-")
		if len(parts) >= 4 {
			version := parts[2]
			return version
		}
	}

	return ""
}

func readVersions(branch string) string {
	filePath := "release_state.json"
	v, err := ioutil.ReadFile(filePath)
	if err != nil {
		log.Fatalln("Error reading version JSON file!")
	}

	var data Versions
	err = json.Unmarshal(v, &data)
	if err != nil {
		log.Fatalln("Error in JSON data!")
	}
	switch branch {
	case "stable":
		return data.Stable
	case "beta":
		return data.Beta
	case "experimental":
		return data.Experimental
	}
	return ""
}