using Sandbox;
using System;
using System.Collections.Generic;

namespace Socer;

// Original synthesized foil / rising air / impact cues; no reference-game audio.
public sealed class PackOpeningSound
{
    static readonly Dictionary<int,SoundFile> files=new();
    readonly List<SoundHandle> playing=new();
    public int CuesPlayed {get;private set;}
    public void Update(float age,float previous,int tier,float reveal)
    {
        playing.RemoveAll(h=>h==null || !h.IsValid || !h.IsPlaying);
        if(GamePreferences.SoundVolume<=0){Stop();return;}
        if(previous<0 && age<.35f){Play(0,.18f);Play(5,.10f);}
        if(previous<.92f && age>=.92f && age<1.3f)Play(1,.38f);
        float rise=Math.Max(1.55f,reveal-1.65f);
        if(tier>=2 && previous<rise && age>=rise && age<rise+.3f)Play(tier>=4?4:2,.28f);
        if(previous<reveal && age>=reveal && age<reveal+.3f){Play(3,tier>=3?.48f:.28f);if(tier>=2)Play(6,.24f);}
    }
    void Play(int cue,float volume)
    {
        if(!files.TryGetValue(cue,out var file) || !file.IsValid)
        {
            if(cue>=5)
            {
                file=SoundFile.FromOgg("socer-pack-crowd-"+cue,FileSystem.Mounted.ReadAllBytes(cue==5?"sounds/stadium_ambient.ogg":"sounds/stadium_cheer.ogg"));
                files[cue]=file;
            }
            else
            {
            const int rate=22050;float seconds=cue switch{0=>.6f,1=>.36f,2=>1.45f,4=>1.65f,_=>1.1f};
            var pcm=new byte[(int)(rate*seconds)*2];uint noise=0x91a1u+(uint)cue;
            for(int i=0;i<pcm.Length/2;i++)
            {
                double t=i/(double)rate,p=t/seconds;noise=noise*1664525u+1013904223u;
                double n=(noise/(double)uint.MaxValue)*2-1;
                double v=cue switch{
                    0=>n*.13*Math.Sin(Math.PI*p)*Math.Sin(Math.PI*p),
                    1=>n*.65*Math.Pow(1-p,2.5)*(.4+.6*Math.Abs(Math.Sin(t*96))),
                    2 or 4=>(n*.10+Math.Sin(2*Math.PI*(130*t+180*t*t))*.18)*p*p*(1-Math.Pow(p,12)),
                    _=>Math.Sin(2*Math.PI*(58*t-12*t*t))*.5*Math.Exp(-t*5)+n*.18*Math.Exp(-t*15)+Math.Sin(2*Math.PI*740*t)*.06*Math.Exp(-t*4)};
                short sample=(short)(Math.Clamp(v,-.9,.9)*27000);pcm[i*2]=(byte)sample;pcm[i*2+1]=(byte)(sample>>8);
            }
            file=SoundFile.FromPcm("socer-pack-cinematic-v1-"+cue,pcm,new SoundFile.PcmOptions{Channels=1,Rate=rate,Bits=16});files[cue]=file;
            }
        }
        var handle=Sound.PlayFile(file,volume*GamePreferences.SoundVolume/100f);handle.SpacialBlend=0;handle.DistanceAttenuation=false;playing.Add(handle);CuesPlayed++;
    }
    public void Stop(){foreach(var h in playing)if(h!=null && h.IsValid)h.Stop();playing.Clear();}
    public object Diagnostics()=>new{CuesPlayed,Active=playing.Count,Volume=GamePreferences.SoundVolume};
}