using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

namespace RimWorldAnimationStudio
{
    public class StageCardManager : Singleton<StageCardManager>
    {
        public StageCard stageCardPrefab;

        public void Initialize()
        {
            foreach(AnimationStage stage in Workspace.animationDef.animationStages)
            { MakeStageCard(stage.stageName); }
        }

        public void Reset()
        {
            foreach(StageCard stageCard in GetComponentsInChildren<StageCard>())
            { Destroy(stageCard.gameObject); }
        }

        public StageCard MakeStageCard(string stageName = null)
        {
            StageCard stageCard = Instantiate(stageCardPrefab, transform);

            if (stageName != null)
            { stageCard.Initialize(stageName); }

            return stageCard;
        }

        public void OnNewStage()
        {
            if (AddAnimationStage())
            { MakeStageCard("NewStage"); }
        }

        public bool AddAnimationStage()
        {
            AnimationStage stage = new AnimationStage();

            Workspace.Instance.MakeDirty();

            return stage.MakeNew();
        }

        public void OnCloneStage()
        {
            if (CloneAnimationStage())
            {
                StageCard stageCard = MakeStageCard(Workspace.animationDef.animationStages[Workspace.stageID + 1].stageName);
                stageCard.transform.SetSiblingIndex(Workspace.stageID + 1);
            }
        }

        public bool CloneAnimationStage()
        {
            AnimationStage stage = Workspace.animationDef.animationStages[Workspace.stageID].Copy();
            stage.Initialize();
            stage.stageName += " (Clone)";

            Workspace.animationDef.animationStages.Insert(Workspace.stageID + 1, stage);

            Workspace.Instance.MakeDirty();

            return true;
        }

        public bool MoveAnimationStage(int startIndex, int delta)
        {
            if (startIndex + delta < 0 || startIndex + delta >= Workspace.animationDef.animationStages.Count)
            { return false; }

            AnimationStage stage = Workspace.animationDef.animationStages[startIndex];
            Workspace.animationDef.animationStages[startIndex] = Workspace.animationDef.animationStages[startIndex + delta];
            Workspace.animationDef.animationStages[startIndex + delta] = stage;

            Workspace.Instance.MakeDirty();

            return true;
        }

        public void OnRemoveStage()
        {
            if (RemoveAnimationStage())
            { Destroy(transform.GetChild(Workspace.stageID).gameObject); }
        }

        public bool RemoveAnimationStage()
        {
            if (Workspace.animationDef.animationStages.Count == 1)
            {
                Debug.LogWarning("Cannot delete animation stage - the animation must contain at least one animation stage.");
                return false;
            }

            Workspace.animationDef.animationStages.RemoveAt(Workspace.stageID);
            Workspace.stageID = Workspace.stageID >= Workspace.animationDef.animationStages.Count ? Workspace.stageID = Workspace.animationDef.animationStages.Count - 1 : Workspace.stageID;

            Workspace.Instance.MakeDirty();

            return true;
        }
    }
}