using UnityEngine;
using UnityEngine.UI;

namespace DepthsOfGreed.HandbookUI
{
    // Only rendering and input change; all GameObjects and gameplay keep running.
    public sealed class BasementRoomView : MonoBehaviour
    {
        public Canvas roomCanvas;
        public GraphicRaycaster roomRaycaster;
        public Camera roomCamera;
        public RectTransform[] horizontalSurfaces;
        public RectTransform leftBoundary,rightBoundary;
        public Vector2 referenceSize=new Vector2(1920,1080);
        public bool IsVisible {get;private set;}
        public void SetVisible(bool visible)
        {
            IsVisible=visible;
            roomCanvas.enabled=visible;roomRaycaster.enabled=visible;roomCamera.enabled=visible;
            Fit();
        }
        void Awake()=>SetVisible(false);
        void LateUpdate(){if(IsVisible)Fit();}
        void Fit()
        {
            float scale=Mathf.Abs(roomCanvas.transform.lossyScale.y);
            roomCamera.orthographicSize=Mathf.Max(referenceSize.y*.5f,referenceSize.x*.5f/Mathf.Max(.1f,roomCamera.aspect))*scale;
            float width=Mathf.Max(referenceSize.x,roomCamera.orthographicSize*2*roomCamera.aspect/Mathf.Max(.00001f,scale));
            ((RectTransform)roomCanvas.transform).sizeDelta=new Vector2(width,referenceSize.y);
            if(horizontalSurfaces!=null)foreach(var surface in horizontalSurfaces)if(surface)surface.sizeDelta=new Vector2(width,surface.sizeDelta.y);
            if(leftBoundary)leftBoundary.anchoredPosition=new Vector2(-width*.5f+10,leftBoundary.anchoredPosition.y);
            if(rightBoundary)rightBoundary.anchoredPosition=new Vector2(width*.5f-10,rightBoundary.anchoredPosition.y);
        }
    }
}