package javaentities

import (
	"errors"
	"os"
	"path"
	"runtime"
	"strconv"
	"strings"
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	"git.gregbrzezinski.com/Skirda/skirdaGoLauncher/api"
	"git.gregbrzezinski.com/Skirda/skirdaGoLauncher/downloader"
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)

type JavaVersion struct {
	Major int
	Minor int
	Patch int
}

type JavaMetas struct {
	JavaVersions []JavaMeta `json:"javaVersions"`
}

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func (jm JavaMetas) GetOsURL() (string, error) {

}

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type JavaMeta struct {
	Version struct {
		Major string `json:"major"`
		Minor string `json:"minor"`
		Patch string `json:"patch"`
	} `json:"version"`
	Specifics `json:"specifics"`
}

type SpecificJavaVersion struct {
	Os   string `json:"os"`
	Arch string `json:"arch"`
	URL  string `json:"URL"`
	Sha1 string `json:"SHA1"`
}

type Specifics []SpecificJavaVersion

func (s Specifics) getOsJava() (SpecificJavaVersion, error) {
	for _, v := range s {
		if v.Os == runtime.GOOS {
			return v, nil
		}
	}
	return SpecificJavaVersion{}, errors.New("not java for current os")
}

func (v *JavaVersion) CheckNotExists(launcherPath string) bool {
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	javaBinPath := path.Join(launcherPath, ".redist", "java", v.GetString())
	_, err := os.Stat(javaBinPath)

	return err != nil
}

func (v *JavaVersion) GetString() string {
	var stringBuilder strings.Builder
	stringBuilder.WriteString(strconv.Itoa(v.Major))
	stringBuilder.WriteRune('.')
	stringBuilder.WriteString(strconv.Itoa(v.Minor))
	stringBuilder.WriteRune('.')
	stringBuilder.WriteString(strconv.Itoa(v.Patch))

	return stringBuilder.String()
}
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func (v *JavaVersion) DownloadLatest(downloadDir string) (downloader.DownloadFile, error) {
	javaVersionMeta := JavaMetas{}
	task := downloader.DownloadFile{
		Url:  "",
		Path: "",
	}

	javaVersionMeta, err := api.GetJavaVersionMetas()

	// if err := downloadJson("https://skirda.gregbrzezinski.com/java_version_manifest.json", &javaVersionMeta); err != nil {
	// 	return task, errors.New("error in download json")
	// }

	// javaSpecific := SpecificJavaVersion{}

	javaSpecific, err := javaVersionMeta.getOsJava()
	if err != nil {
		return task, err
	}

	task = downloader.DownloadFile{
		Url:  javaSpecific.URL,
		Path: path.Join(downloadDir, v.GetString()),
	}

	return task, nil
}
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