// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License. See LICENSE in the project root for license information.

using UnityEngine;
using HoloToolkit.Unity;
using HoloToolkit.Unity.InputModule;

public class LoFiFilterSelection : MonoBehaviour, IInputClickHandler
{
    [Tooltip("Material used when the emitter is set to Narrow Band Telephony")]
    [SerializeField]
    private Material NarrowBandTelephony;

    [Tooltip("Material used when the emitter is set to AM Radio")]
    [SerializeField]
    private Material AmRadio;

    [Tooltip("Material used when the emitter is set to Full Range")]
    [SerializeField]
    private Material FullRange;

    [Tooltip("Material used when the emitter is set to an unknown quality")]
    [SerializeField]
    private Material UnknownQuality;

    private AudioLoFiEffect loFiEffect;

    private void Start()
    {
        // Get the attached AudioLoFiEffect script.
        loFiEffect = gameObject.GetComponent<AudioLoFiEffect>();
        if (loFiEffect == null)
        {
            Debug.LogError("LoFiFilterSelection requires an AudioLoFiEffect to be attached to the game object.");
        }

        // Set the material of the emitter object to match that of the
        // initial AudioLoFiEffect.SourceQuality value.
        SetEmitterMaterial(loFiEffect.SourceQuality);
    }

    /// <summary>
    /// Changes the AudioLoFiEffect source quality on click.
    /// </summary>
    /// <param name="data">Not used by this implementation.</param>
    public void OnInputClicked(InputClickedEventData data)
    {
        // Make sure we found an AudioLoFiEffect script.
        if (loFiEffect == null) { return; }

        // Get the current source quality setting.
        AudioLoFiSourceQuality sourceQuality = loFiEffect.SourceQuality;

        // Increment the source quality.
        switch (sourceQuality)
        {
            case AudioLoFiSourceQuality.NarrowBandTelephony:
                sourceQuality = AudioLoFiSourceQuality.AmRadio;
                break;

            case AudioLoFiSourceQuality.AmRadio:
                sourceQuality = AudioLoFiSourceQuality.FullRange;
                break;

            case AudioLoFiSourceQuality.FullRange:
                sourceQuality = AudioLoFiSourceQuality.NarrowBandTelephony;
                break;

        }

        // Update the emitter material to match the new source quality.
        SetEmitterMaterial(sourceQuality);

        // Update the source quality.
        loFiEffect.SourceQuality = sourceQuality;
    }

    private void SetEmitterMaterial(AudioLoFiSourceQuality sourceQuality)
    {
        Material emitterMaterial = UnknownQuality;

        // Determine the material for the emitter based on the source quality.
        switch (sourceQuality)
        {
            case AudioLoFiSourceQuality.NarrowBandTelephony:
                emitterMaterial = NarrowBandTelephony;
                break;

            case AudioLoFiSourceQuality.AmRadio:
                emitterMaterial = AmRadio;
                break;

            case AudioLoFiSourceQuality.FullRange:
                emitterMaterial = FullRange;
                break;
        }

        // Set the material on the emitter.
        gameObject.GetComponent<Renderer>().sharedMaterial = emitterMaterial;
    }
}