//-----------------------------------------------------------------------
//-----------------------------------------------------------------------
//     file="CharacterIndexImage.cs"
//     Project: StgSharp
//     AuthorGroup: Nitload Space
//     Copyright (c) Nitload Space. All rights reserved.
//     
//     Permission is hereby granted, free of charge, to any person 
//     obtaining a copy of this software and associated documentation 
//     files (the “Software”), to deal in the Software without restriction, 
//     including without limitation the rights to use, copy, modify, merge,
//     publish, distribute, sublicense, and/or sell copies of the Software, 
//     and to permit persons to whom the Software is furnished to do so, 
//     subject to the following conditions:
//     
//     The above copyright notice and 
//     this permission notice shall be included in all copies 
//     or substantial portions of the Software.
//     
//     THE SOFTWARE IS PROVIDED “AS IS”, 
//     WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
//     INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
//     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
//     IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
//     DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
//     ARISING FROM, OUT OF OR IN CONNECTION WITH 
//     THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//     
//-----------------------------------------------------------------------
//-----------------------------------------------------------------------
using StgSharp.Geometries;
using StgSharp.Graphics;
using StgSharp.Mathematics;

using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics.Contracts;
using System.Linq;
using System.Text;

namespace StgSharp.Controls
{
    public class CharacterLineIndexImage : ControllingItem
    {

        private char[] displayIndex;
        private char defaultChar;

        private Dictionary<char, PlainGeometryMesh> texIndex;
        private int length;
        private PlainGeometryMesh _tittleMesh;

        public CharacterLineIndexImage(
               int length,
               char defaultChar,
               PlainGeometryMesh tittleMesh,
               IEnumerable<(char, PlainGeometryMesh)> indexEnumeration )
        {
            this.length = length;
            displayIndex = new char[length];
            _tittleMesh = tittleMesh;
            texIndex = indexEnumeration.ToDictionary( item => item.Item1, item => item.Item2 );
        }

        public bool IsEntity
        {
            get => true;
        }

        public ReadOnlySpan<Vec4> TextureBox
        {
            get => throw new NotSupportedException();
        }

        public Rectangle BoundingBox
        {
            get => throw new NotImplementedException();
            set => throw new NotImplementedException();
        }

        public Vec2 Position
        {
            get => throw new NotImplementedException();
            set => throw new NotImplementedException();
        }

        public void Display( string message )
        {
            if( string.IsNullOrEmpty( message ) ) {
                message = string.Empty;
            }

            string result = ( message.Length >= length ) ?
                    message.Substring( message.Length - displayIndex.Length ) : message.PadLeft(
                        length, defaultChar );

            displayIndex = result.ToCharArray();
        }

        public IEnumerator<PlainGeometryMesh> GetEnumerator()
        {
            yield return _tittleMesh;
            foreach( char item in displayIndex ) {
                yield return texIndex[ item ];
            }
        }

    }
}