using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using FFmpeg.AutoGen;

namespace ADOFAIRenderer.Data;

/// <summary>
/// Video codec of the output. The encoder implementation (hardware or software) is chosen at run time from the
/// encoders available for the codec (VideoEncoder, GPUUtil.GetPrioritizedEncoders).
/// Values: <c>H264</c> (H.264 / AVC), <c>H265</c> (H.265 / HEVC), <c>VP9</c>, <c>AV1</c>, <c>VVC</c> (H.266).
/// The audio codec paired with each value is given by CodecUtil.AudioCodecMatch.
/// </summary>
[SuppressMessage("ReSharper", "InconsistentNaming")]
public enum Codec
{
    H264, H265, VP9, AV1, VVC
}

/// <summary>Audio codec choice and supported sample rates per video codec.</summary>
internal static class CodecUtil
{
    /// <summary>Audio codec encoded together with each video codec (AAC for H.264/H.265, Opus for the others).</summary>
    public static readonly Dictionary<Codec, AVCodecID> AudioCodecMatch = new()
    {
        [Codec.H264] = AVCodecID.AV_CODEC_ID_AAC,
        [Codec.H265] = AVCodecID.AV_CODEC_ID_AAC,
        [Codec.VP9] = AVCodecID.AV_CODEC_ID_OPUS,
        [Codec.AV1] = AVCodecID.AV_CODEC_ID_OPUS,
        [Codec.VVC] = AVCodecID.AV_CODEC_ID_OPUS
    };

    /// <summary>
    /// Output sample rates (Hz) the mod allows per audio codec. RenderManager.SetupPlay replaces a configured rate that
    /// is not in the list with 48000 Hz.
    /// </summary>
    public static readonly Dictionary<AVCodecID, List<int>> AvailableSampleRate = new()
    {
        [AVCodecID.AV_CODEC_ID_AAC] = new List<int> { 44100, 48000, 96000 },
        [AVCodecID.AV_CODEC_ID_OPUS] = new List<int> { 48000 }
    };
}