package services

import (
	"encoding/json"
	"fmt"
	"path/filepath"
	"strings"
)

func GetOutputPath(inputPath, suffix string) string {
	ext := filepath.Ext(inputPath)
	name := strings.TrimSuffix(inputPath, ext)
	return name + suffix + ext
}

func ChangeExtension(filePath, newExt string) string {
	ext := filepath.Ext(filePath)
	name := strings.TrimSuffix(filePath, ext)
	return name + newExt
}

func GetBaseName(filePath string) string {
	name := filepath.Base(filePath)
	ext := filepath.Ext(name)
	return strings.TrimSuffix(name, ext)
}

func ToJSON(v interface{}) ([]byte, error) {
	return json.MarshalIndent(v, "", "  ")
}

func ParseJSON(data []byte, v interface{}) error {
	return json.Unmarshal(data, v)
}

// formatSize 格式化文件大小为可读字符串
func formatSize(bytes int64) string {
	const (
		KB = 1024
		MB = KB * 1024
		GB = MB * 1024
	)

	switch {
	case bytes >= GB:
		return fmt.Sprintf("%.2f GB", float64(bytes)/float64(GB))
	case bytes >= MB:
		return fmt.Sprintf("%.2f MB", float64(bytes)/float64(MB))
	case bytes >= KB:
		return fmt.Sprintf("%.2f KB", float64(bytes)/float64(KB))
	default:
		return fmt.Sprintf("%d B", bytes)
	}
}