package main

import (
	"fmt"
	"log"
	"os"
	"strconv"
	"strings"
	"time"
)

const (
	version     = "0.0.4-alpha"
	chartfile   = "./deploy/sthome-webhook/Chart.yaml"
	valuesfile  = "./deploy/sthome-webhook/values.yaml"
	tagprefix   = "  tag: "
	vertxtfile  = "./version.txt"
	apiVersion  = "v1"
	description = "Cert-Manager webhook for sthome"
	name        = "sthome-webhook"
)

var (
	buildTime        string
	appVersion       string
	longversion      string
	multilineversion string
)

func main() {
	// Load the file content
	vFileData, _ := os.ReadFile("version.txt")

	// Convert from Byte array to string and split
	// on newlines. We now have a slice of strings
	vLines := strings.Split(string(vFileData), "\n")

	// Generate a timestamp.
	buildTime = time.Now().Format("20060102-1504")

	// Load the count from the 3rd line of the file
	// It's a string so we need to convert to integer
	// Then increment it by 1
	bNum, _ := strconv.Atoi(vLines[2])
	bNum++
	longversion = version + "." + fmt.Sprint(bNum)
	appVersion = "v" + longversion
	// Generate a single string to write back to the file
	multilineversion = longversion + "\n" + buildTime + "\n" + fmt.Sprint(bNum)
	chartStr := "apiVersion: " + apiVersion + "\nappVersion: " + appVersion + "\ndescription: " + description + "\nname: " + name + "\nversion: " + longversion + "\n"
	// Write the data back to the file.
	_ = os.WriteFile(vertxtfile, []byte(multilineversion), 0777)
	_ = os.WriteFile(chartfile, []byte(chartStr), 0777)
	replacetxtfilelines(valuesfile, tagprefix, tagprefix+longversion)
}

func replacetxtfilelines(filename string, textLinePrefix string, replacetext string) {
	input, err := os.ReadFile(filename)
	if err != nil {
		log.Fatalln(err)
	}

	lines := strings.Split(string(input), "\n")

	for i, line := range lines {
		if strings.HasPrefix(line, textLinePrefix) {
			lines[i] = replacetext
		}
	}
	output := strings.Join(lines, "\n")
	err = os.WriteFile(filename, []byte(output), 0644)
	if err != nil {
		log.Fatalln(err)
	}
}