// Author: Gockner, Simon
// Created: 2021-04-07
// Copyright(c) 2021 SimonG. All Rights Reserved.

using System.Collections.Generic;
using Lib.Audio.Controls.Buttons.Factories;
using Lib.Audio.Controls.Buttons.Interfaces;
using Lib.Audio.Controls.Factories;
using Lib.Audio.Controls.Interfaces;
using Lib.Audio.Interfaces;

namespace Lib.Audio
{
    public class Channel : IChannel
    {
        private readonly uint _channelNumber;

        public Channel(uint channelNumber,
            IDeviceButtonConfiguration buttonConfiguration,
            IFaderFactory faderFactory,
            IKnobFactory knobFactory,
            IButtonFactory buttonFactory)
        {
            _channelNumber = channelNumber;
            Fader = faderFactory.Create();
            Knob = knobFactory.Create();
            Buttons = InitializeButtons(buttonConfiguration, buttonFactory);
            
            Fader.PositionChanged += OnFaderPositionChanged;
        }

        public IFader Fader { get; }
        public IKnob Knob { get; }
        public List<IButton> Buttons { get; }
        public IControllable? Controllable { get; private set; }
        
        public void AllocateControllable(IControllable controllable) => Controllable = controllable;

        //TODO: fix button handling
        private List<IButton> InitializeButtons(IDeviceButtonConfiguration buttonConfiguration, IButtonFactory buttonFactory)
        {
            List<IButton> buttons = new();
            for (int i = 0; i < buttonConfiguration.NumberOfButtons; i++) 
                buttons.Add(buttonFactory.Create());

            return buttons;
        }
        
        private void OnFaderPositionChanged(object? sender, float position) => Controllable?.SetVolume(position);

        public override string ToString() => $"Channel {_channelNumber}";
    }
}