using UnityEngine;
using UnityEngine.UI;

public class SettingsManager : MonoBehaviour {

	public static SettingsManager Instance {
		get;
		set;
	}

	/// <summary>
	///		The given music volume slider element
	/// </summary>
	public Slider musicSlider;

	/// <summary>
	///		The given sfx volume slider element
	/// </summary>
	public Slider sfxSlider;

	private Settings settings;

	void Awake() {
		Instance = this;
	}

	void Start() {
		ApplySettings(GameManager.Instance.settings);
	}

	/// <summary>
	///		Sets the musics volume for whole environment and applies volume to global settings
	/// </summary>
	/// <param name="volume"></param>
	public void SetMusicsVolume(float volume) {
		SetMusicsVolumeSoundSystem(volume);

		//Changes settings
		settings.audio.MusicsVolume = volume;
		GameManager.Instance.ApplySettings(settings);
	}

	/// <summary>
	///		Sets the sfx volume for whole environment and applies volume to global settings
	/// </summary>
	/// <param name="volume"></param>
	public void SetSFXVolume(float volume) {
		SetSFXVolumeSoundSystem(volume);

		//Changes settings
		settings.audio.SfxVolume = volume;
		GameManager.Instance.ApplySettings(settings);
	}

	private void SetMusicsVolumeSoundSystem(float volume) {
		AudioManager.Instance.SetMusicsVolume(volume);

		Debug.Log("Music volume changed: " + volume.ToString("0.00"));
	}

	private void SetSFXVolumeSoundSystem(float volume) {
		AudioManager.Instance.SetSFXVolume(volume);

		Debug.Log("SFX volume changed: " + volume.ToString("0.00"));
	}


	/// <summary>
	///		Applies given settings to global settings and executes them
	/// </summary>
	/// <param name="settings"></param>
	public void ApplySettings(Settings settings) {
		this.settings = settings;

		ApplyAudioSettings(settings.audio);

		Debug.Log("All settings successfully applied");
	}

	private void ApplyAudioSettings(Settings.Audio settings) {
		float music = settings.MusicsVolume;
		float sfx = settings.SfxVolume;

		if (musicSlider.value == music) {
			musicSlider.value = music;
			SetMusicsVolumeSoundSystem(music);
		}
		else {
			musicSlider.value = music;
		}

		if (sfxSlider.value == sfx) {
			sfxSlider.value = sfx;
			SetSFXVolumeSoundSystem(sfx);
		}
		else {
			sfxSlider.value = sfx;
		}

		Debug.Log("Applied sound settings: Music=" + settings.MusicsVolume.ToString("0.00")
			+ " SFX=" + settings.SfxVolume.ToString("0.00"));
	}
}