package m3u8

import (
	"bytes"
	"context"
	"fmt"
	"os"
)

func configuredKey(path string) (*bytes.Buffer, error) {
	key, err := os.ReadFile(path)
	if err != nil {
		return nil, fmt.Errorf("read media key %s: %w", path, err)
	}
	if len(key) != 16 {
		return nil, fmt.Errorf("media key must contain 16 bytes: %s", path)
	}
	return bytes.NewBuffer(key), nil
}

func Enkey(ctx context.Context) (*bytes.Buffer, error) {
	return configuredKey("conf/m3u8.key")
}

func NewEnkey(ctx context.Context) (*bytes.Buffer, error) {
	return configuredKey("conf/newm3u8.key")
}

func LsjEnkey(ctx context.Context) (*bytes.Buffer, error) {
	return configuredKey("conf/lsjm3u8.key")
}