package transcode

import "fmt"

type Options struct {
    Format     string
    SampleRate int
    Channels   int
    Codec      string
}

func WhisperOptions() Options {
    return Options{
        Format:     FormatWAV,
        SampleRate: 16000,
        Channels:   1,
        Codec:      "pcm_s16le",
    }
}

func (o *Options) ApplyDefaults() error {
    spec, err := ResolveFormat(o.Format)
    if err != nil {
        return err
    }
    if o.Codec == "" {
        o.Codec = spec.Codec
    }
    return nil
}

func (o *Options) Validate() error {
    if err := o.ApplyDefaults(); err != nil {
        return err
    }
    if o.SampleRate < 0 || o.Channels < 0 {
        return fmt.Errorf("sample_rate and channels must be >= 0")
    }
    if o.Channels > 8 {
        return fmt.Errorf("channels must be <= 8")
    }
    return nil
}