using UnityEngine;

namespace GameKitController.Audio
{
	public class AudioPlayer
	{
		public static void Play (AudioElement audioElement, GameObject gameObj)
		{
			if (audioElement == null) {
				return;
			}

			if (audioElement.audioPlayMethod == AudioPlayMethod.UnityAudio) {
				GetComponentAudioSourceIfNull (audioElement, gameObj);

				if (!audioElement.audioSourceAssigned) {
					return;
				}

				if (audioElement.clip != null) {
					audioElement.audioSource.clip = audioElement.clip;
				}

				if (audioElement.audioSource.enabled) {
					audioElement.audioSource.Play ();
				}
			} else if (audioElement.audioPlayMethod == AudioPlayMethod.External) {
				var externalAudioPlayer = AudioManager.Instance.GetExternalAudioPlayer ();

				if (externalAudioPlayer == null) {
					return;
				}

				externalAudioPlayer.Play (audioElement, gameObj);
			}
		}

		public static void PlayOneShot (AudioElement audioElement, GameObject gameObj, float volumeScale = 1.0f)
		{
			if (audioElement == null)
				return;

			if (audioElement.audioPlayMethod == AudioPlayMethod.UnityAudio) {
				GetComponentAudioSourceIfNull (audioElement, gameObj);

				if (!audioElement.audioSourceAssigned || audioElement.clip == null) {
					return;
				}

				if (audioElement.audioSource.enabled) {
					audioElement.audioSource.PlayOneShot (audioElement.clip, volumeScale);
				}
			} else if (audioElement.audioPlayMethod == AudioPlayMethod.External) {
				var externalAudioPlayer = AudioManager.Instance.GetExternalAudioPlayer ();

				if (externalAudioPlayer == null) {
					return;
				}

				externalAudioPlayer.PlayOneShot (audioElement, gameObj, volumeScale);
			}
		}

		public static void Stop (AudioElement audioElement, GameObject gameObj)
		{
			if (audioElement == null) {
				return;
			}

			if (audioElement.audioPlayMethod == AudioPlayMethod.UnityAudio) {
				GetComponentAudioSourceIfNull (audioElement, gameObj);

				if (!audioElement.audioSourceAssigned) {
					return;
				}

				audioElement.audioSource.Stop ();
			} else if (audioElement.audioPlayMethod == AudioPlayMethod.External) {
				var externalAudioPlayer = AudioManager.Instance.GetExternalAudioPlayer ();

				if (externalAudioPlayer == null) {
					return;
				}

				externalAudioPlayer.Stop (audioElement, gameObj);
			}
		}

		public static void Pause (AudioElement audioElement, GameObject gameObj)
		{
			if (audioElement == null) {
				return;
			}

			if (audioElement.audioPlayMethod == AudioPlayMethod.UnityAudio) {
				GetComponentAudioSourceIfNull (audioElement, gameObj);

				if (!audioElement.audioSourceAssigned) {
					return;
				}

				audioElement.audioSource.Pause ();
			} else if (audioElement.audioPlayMethod == AudioPlayMethod.External) {
				var externalAudioPlayer = AudioManager.Instance.GetExternalAudioPlayer ();

				if (externalAudioPlayer == null) {
					return;
				}

				externalAudioPlayer.Pause (audioElement, gameObj);
			}
		}

		public static void UnPause (AudioElement audioElement, GameObject gameObj)
		{
			if (audioElement == null) {
				return;
			}

			if (audioElement.audioPlayMethod == AudioPlayMethod.UnityAudio) {
				GetComponentAudioSourceIfNull (audioElement, gameObj);

				if (!audioElement.audioSourceAssigned) {
					return;
				}

				audioElement.audioSource.UnPause ();
			} else if (audioElement.audioPlayMethod == AudioPlayMethod.External) {
				var externalAudioPlayer = AudioManager.Instance.GetExternalAudioPlayer ();

				if (externalAudioPlayer == null) {
					return;
				}

				externalAudioPlayer.UnPause (audioElement, gameObj);
			}
		}

		private static void GetComponentAudioSourceIfNull (AudioElement audioElement, GameObject gameObj)
		{
			if (!audioElement.audioSourceAssigned) {
				audioElement.audioSourceAssigned = audioElement.audioSource != null;
			}

			if (!audioElement.audioSourceAssigned) {
				audioElement.audioSource = gameObj.GetComponent<AudioSource> ();

				audioElement.audioSourceAssigned = audioElement.audioSource != null;
			}
		}
	}
}