package makefile

import (
	"github.com/ManyakRus/crud_generator/internal/config"
	"github.com/ManyakRus/crud_generator/internal/constants"
	"github.com/ManyakRus/crud_generator/internal/folders"
	"github.com/ManyakRus/starter/log"
	"github.com/ManyakRus/starter/micro"
	"os"
	"strings"
)

// CreateAllFiles - создаёт файл makefile в корне проекта
func CreateAllFiles() error {
	var err error

	err = CreateMakefile()
	if err != nil {
		log.Error("CreateMakefile() error: ", err)
		return err
	}

	return err
}

// CreateMakefile - создаёт 1 файл в папке grpc
func CreateMakefile() error {
	var err error

	if config.Settings.USE_DEFAULT_TEMPLATE == false {
		return err
	}

	//чтение файлов
	DirBin := micro.ProgramDir_bin()
	DirTemplates := DirBin + config.Settings.TEMPLATE_FOLDERNAME + micro.SeparatorFile()
	DirReady := DirBin + config.Settings.READY_FOLDERNAME + micro.SeparatorFile()
	DirTemplatesMakefile := DirTemplates
	DirReadyMakefile := DirReady
	FilenameReadyMakefile := DirReadyMakefile + constants.MAKEFILE_FILENAME
	FilenameTemplateMakefile := DirTemplatesMakefile + constants.MAKEFILE_FILENAME + "_"

	//создадим папку готовых файлов
	folders.CreateFolder(DirReadyMakefile)

	bytes, err := os.ReadFile(FilenameTemplateMakefile)
	if err != nil {
		log.Panic("ReadFile() ", FilenameTemplateMakefile, " error: ", err)
	}
	TextMakefile := string(bytes)

	//ReplaceAll
	TextMakefile = strings.ReplaceAll(TextMakefile, config.Settings.TEMPLATE_SERVICE_NAME, strings.ToLower(config.Settings.SERVICE_NAME))

	//заполним SERVICEURL
	VariableName := "SERVICEURL"
	Value := config.Settings.SERVICE_REPOSITORY_URL
	TextMakefile = ReplaceVariable(TextMakefile, VariableName, Value)

	//заполним GENERATION_PROTO
	VariableName = "CD_GENERATION_PROTO"
	Value = "cd ./" + config.Settings.TEMPLATE_FOLDERNAME_GRPC_PROTO + " && \\"
	TextMakefile = ReplaceVariable(TextMakefile, VariableName, Value)

	//заполним GENERATION_PROTO
	VariableName = "GENERATION_PROTO"
	Value = "./" + constants.GENERATION_PROTO_FILENAME
	TextMakefile = ReplaceVariable(TextMakefile, VariableName, Value)

	//запись файла
	err = os.WriteFile(FilenameReadyMakefile, []byte(TextMakefile), constants.FILE_PERMISSIONS)

	return err
}

// ReplaceVariable - заменяет переменную в тексте
func ReplaceVariable(Text, VariableName, Value string) string {
	Otvet := Text

	pos1 := strings.Index(Otvet, "\n"+VariableName)
	if pos1 < 0 {
		//нет такого
		Otvet = Otvet + "\n" + VariableName + " = " + Value
		return Otvet
	}

	s2 := Text[pos1+1:]
	posEnd := strings.Index(s2, "\n")
	if posEnd < 0 {
		return Otvet
	}

	Otvet = Otvet[:pos1+1] + VariableName + "=" + Value + Otvet[pos1+1+posEnd:]

	return Otvet
}