using UnityEngine;
using UnityEngine.Playables;
using System.Collections.Generic;
using PixelCrushers.DialogueSystem;
using Skatebirb.Gameplay;
using Skatebirb.Managers;

namespace Skatebirb.Timeline
{
	public class DialogMixerBehaviour : PlayableBehaviour
	{
		private List<DialogBehaviour> havePlayedDialogs = new List<DialogBehaviour>();
		private bool shouldPauseForDialog = false;

		private PlayableGraph ourGraph;
		private PlayableDirector ourDiretor;

		public override void OnPlayableCreate(Playable playable)
		{
			ourGraph = playable.GetGraph();
			ourDiretor = ourGraph.GetResolver() as PlayableDirector;
		}

		public override void OnGraphStart(Playable playable)
		{
			havePlayedDialogs.Clear();
			shouldPauseForDialog = false;
		}

		public override void ProcessFrame(Playable playable, FrameData info, object playerData)
		{
			bool noPlayablesPlaying = true;

			// If this code is being run in the editor because we're editing the timelines or something? Just give up, don't do ANY of this.
			if (!Application.isPlaying) { return; }

			// Iterate over all the clips on this track
			int numInputPlayables = playable.GetInputCount();
			for (int playableIndex = 0; playableIndex < numInputPlayables; playableIndex++)
			{
				// First, extract the weight, since it's what tells us if we're even processing this playable
				float inputWeight = playable.GetInputWeight(playableIndex);

				if (inputWeight > 0.1f)
				{
					noPlayablesPlaying = false;

					// Extracting the behavior is... complicated
					ScriptPlayable<DialogBehaviour> inputPlayable = (ScriptPlayable<DialogBehaviour>)playable.GetInput(playableIndex);
					DialogBehaviour inputDialogBehaviour = inputPlayable.GetBehaviour();
					if (inputDialogBehaviour == null || string.IsNullOrEmpty(inputDialogBehaviour.dialogName)) { continue; }

					// If we're active, and haven't actually played dialog yet - NOW IS THE TIME BOY
					if (!havePlayedDialogs.Contains(inputDialogBehaviour))
					{
						// Now start the conversation!
						DialogueManager.StartConversation(inputDialogBehaviour.dialogName);

						havePlayedDialogs.Add(inputDialogBehaviour);
						shouldPauseForDialog = true;
					}
				}
			}

			if (noPlayablesPlaying)
			{
				if (shouldPauseForDialog)
				{
					shouldPauseForDialog = false;

					// If the conversation is still going, pause the timeline so the user can keep reading
					// (this will eventually be resumed over in MissionGiver, which is why we MUST have them as the speaker up above)
					if (DialogueManager.IsConversationActive) { ourDiretor.Pause(); }
				}
			}
		}
	}
}