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

using System.Collections.Generic;
using System.Linq;
using Lib.Audio.Factories;
using Lib.Audio.Interfaces;
using Lib.Driver.Interfaces;
using Lib.Logging;
using Lib.Midi.Factories;
using Lib.Midi.Interfaces;
using Lib.Midi.Messages.Interfaces;

namespace Lib.Audio
{
    public class Device : IDevice
    {
        private readonly IDriver _driver;
        private readonly IMidiCommunication _midiCommunication;
        private readonly IChannelFactory _channelFactory;

        public Device(IDriver driver, IControllableCollector controllableCollector, IMidiCommunicationFactory midiCommunicationFactory, IChannelFactory channelFactory)
        {
            _driver = driver;
            _midiCommunication = midiCommunicationFactory.Create(driver);
            _channelFactory = channelFactory;

            Channels = InitializeChannels(controllableCollector);
            
            _midiCommunication.MessageReceived += OnMidiCommunicationMessageReceived;
            _midiCommunication.ErrorReceived += OnMidiCommunicationErrorReceived;
        }

        public string Name => _driver.Name ?? "";
        public List<IChannel> Channels { get; }
        
        public void StartCommunication(bool useMidiView) => _midiCommunication.Open(useMidiView);
        public void StopCommunication() => _midiCommunication.Close();
        private List<IChannel> InitializeChannels(IControllableCollector controllableCollector) => _driver.Channels == null ? new List<IChannel>()
            : _driver.Channels.Select(c => _channelFactory.Create(c, controllableCollector, _midiCommunication)).ToList();

        private void OnMidiCommunicationMessageReceived(object? sender, IMidiMessage message)
        {
            IChannel channel = Channels.First(c => c.ChannelNumber == message.ChannelNumber);
            
            channel.HandleMessage(message);
            channel.SendAcknowledge();
        }

        private void OnMidiCommunicationErrorReceived(object? sender, IMidiMessage message) => 
            Log.Write<Device>($"Midi Error: Message type: {message.GetType()}, Channel: {message.ChannelNumber}, RawMessage: {message.RawMessage}");

        public void Dispose()
        {
            Channels.ForEach(c => c.Dispose());
            _midiCommunication.Close();
        }
    }
}