package ncmcrypt

import (
	"fmt"
	"os"
)

func EmbedMetadata(audio []byte, format NcmFormat, title, artist, album string, coverData []byte) ([]byte, error) {
	tmpFile, err := os.CreateTemp("", "ncmdump-embed-*")
	if err != nil {
		return nil, fmt.Errorf("create temp file: %w", err)
	}
	tmpPath := tmpFile.Name()
	defer os.Remove(tmpPath)

	if _, err := tmpFile.Write(audio); err != nil {
		tmpFile.Close()
		return nil, fmt.Errorf("write temp: %w", err)
	}
	tmpFile.Close()

	ncm := &NeteaseCloudMusic{
		mPng:          [8]byte{0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A},
		mFormat:       format,
		mDumpFilePath: tmpPath,
		mImageData:    coverData,
		mMetadata: &NeteaseClousMusicMetadata{
			mName:   title,
			mArtist: artist,
			mAlbum:  album,
		},
	}

	if _, err := ncm.FixMetadata(false); err != nil {
		return nil, fmt.Errorf("write metadata: %w", err)
	}

	result, err := os.ReadFile(tmpPath)
	if err != nil {
		return nil, fmt.Errorf("read result: %w", err)
	}

	return result, nil
}