using UnityEngine;
using UnityEngine.Serialization;
using System;
using System.Collections;
using System.Collections.Generic;

namespace Fungus
{
	[CommandInfo("Narrative", 
	             "Menu", 
	             "Displays a button in a multiple choice menu")]
	[AddComponentMenu("")]
	public class Menu : Command, ILocalizable
	{
		[Tooltip("Text to display on the menu button")]
		public string text = "Option Text";

		[Tooltip("Notes about the option text for other authors, localization, etc.")]
		public string description = "";

		[FormerlySerializedAs("targetSequence")]
		[Tooltip("Block to execute when this option is selected")]
		public Block targetBlock;

		[Tooltip("Hide this option if the target block has been executed previously")]
		public bool hideIfVisited;

		[Tooltip("If false, the menu option will be displayed but will not be selectable")]
		public BooleanData interactable = new BooleanData(true);

		[Tooltip("A custom Menu Dialog to use to display this menu. All subsequent Menu commands will use this dialog.")]
		public MenuDialog setMenuDialog;

		public override void OnEnter()
		{
			if (setMenuDialog != null)
			{
				// Override the active menu dialog
				MenuDialog.activeMenuDialog = setMenuDialog;
			}

			bool hideOption = (hideIfVisited && targetBlock != null && targetBlock.GetExecutionCount() > 0);

			if (!hideOption)
			{
				MenuDialog menuDialog = MenuDialog.GetMenuDialog();
				if (menuDialog != null)
				{
					menuDialog.gameObject.SetActive(true);

					Flowchart flowchart = GetFlowchart();
					string displayText = flowchart.SubstituteVariables(text);

					menuDialog.AddOption(displayText, interactable, targetBlock);
				}
			}

			Continue();
		}

		public override void GetConnectedBlocks(ref List<Block> connectedBlocks)
		{
			if (targetBlock != null)
			{
				connectedBlocks.Add(targetBlock);
			}		
		}

		public override string GetSummary()
		{
			if (targetBlock == null)
			{
				return "Error: No target block selected";
			}

			if (text == "")
			{
				return "Error: No button text selected";
			}

			return text + " : " + targetBlock.blockName;
		}

		public override Color GetButtonColor()
		{
			return new Color32(184, 210, 235, 255);
		}

		//
		// ILocalizable implementation
		//
		
		public virtual string GetStandardText()
		{
			return text;
		}

		public virtual void SetStandardText(string standardText)
		{
			text = standardText;
		}
		
		public virtual string GetDescription()
		{
			return description;
		}
		
		public virtual string GetStringId()
		{
			// String id for Menu commands is MENU.<Localization Id>.<Command id>
			return "MENU." + GetFlowchartLocalizationId() + "." + itemId;
		}
	}

}