using System.Collections.Generic;
using System;
using Newtonsoft.Json;
using UnityEngine;

namespace UguiToolkit.Editor
{
    public interface ILayoutParser
    {
        LayoutInfo Parser(string txt);
    }

    public class DefaultLayoutParser : ILayoutParser
    {
        public LayoutInfo Parser(string txt)
        {
            var layoutJsonData = JsonConvert.DeserializeObject<LayoutJsonData>(txt);
            List<LayoutInfo.ElementInfo> elementInfos = new();
            LayoutInfo layoutInfo = new(elementInfos, layoutJsonData.info.canvas.size.w, layoutJsonData.info.canvas.size.h);

            void AddElementInfo(LayoutElementJsonData layoutElementJsonData)
            {
                if (layoutElementJsonData.type == "Image")
                {
                    elementInfos.Add(new LayoutInfo.ImageInfo()
                    {
                        imgPath = layoutElementJsonData.imageName,
                        x = layoutElementJsonData.x,
                        y = layoutElementJsonData.y,
                        w = layoutElementJsonData.w,
                        h = layoutElementJsonData.h,
                        layoutInfo = layoutInfo
                    });
                }
                else if (layoutElementJsonData.type == "Text")
                {
                    // TODO

                }
                
                if (layoutElementJsonData.elements != null)
                {
                    foreach (var e in layoutElementJsonData.elements) AddElementInfo(e);
                }
            }
            AddElementInfo(layoutJsonData.root);

            return layoutInfo;
        }
    }

    [Serializable]
    public class LayoutJsonData
    {
        public LayoutInfoJsonData info;
        public LayoutElementJsonData root;
    }

    [Serializable]
    public class LayoutInfoJsonData
    {
        public string version;
        public CanvasInfoJsonData canvas;

        [Serializable]
        public class CanvasInfoJsonData
        {
            public CanvasSizeJsonData size;
            [Serializable]
            public struct CanvasSizeJsonData
            {
                public float w;
                public float h;
            }
        }
    }

    [Serializable]
    public class LayoutElementJsonData
    {
        public string type;
        public string name;
        public float x;
        public float y;
        public float w;
        public float h;
        public List<LayoutElementJsonData> elements;


        public string imageName;
    }
}