using Azimuth;
using Glass.Materials;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using UnitTestSharp;

namespace Glass.UnitTests.Materials
{
    public class GlyphMaterialTests : TestFixture
    {
        [IgnoreTest]
        private SpriteFontDefinition MakeFont(char glyph, Point size, Point? invalidSize = null)
        {
            var font = new SpriteFontDefinition();
            font.GlyphDefinitions[glyph] = new SpriteFontDefinition.GlyphDefinition
            {
                Size = size
            };
            if (invalidSize != null)
            {
                font.InvalidGlyph = new SpriteFontDefinition.GlyphDefinition
                {
                    Size = invalidSize.Value,
                };
            }
            return font;
        }

        public void CalculateLayoutSizeReturnsGlyphSize()
        {
            var material = new GlyphMaterial
            {
                Glyph = 'A',
                Font = MakeFont('A', new Point(7, 12))
            };

            CheckEqual(new Vector(7, 12), material.CalculateLayoutSize(Vector.PositiveInfinity));
        }

        public void CalculateLayoutSizeClamps()
        {
            var material = new GlyphMaterial
            {
                Glyph = 'A',
                Font = MakeFont('A', new Point(7, 12))
            };

            CheckEqual(new Vector(3, 4), material.CalculateLayoutSize(new Vector(3, 4)));
        }

        public void CalculateLayoutSizeMissingGlyph()
        {
            var material = new GlyphMaterial
            {
                Glyph = 'A',
                Font = MakeFont('B', new Point(7, 12), new Point(3, 4))
            };

            CheckEqual(new Vector(3, 4), material.CalculateLayoutSize(Vector.PositiveInfinity));
        }

        public void CalculateLayoutSizeMissingGlyphClamps()
        {
            var material = new GlyphMaterial
            {
                Glyph = 'A',
                Font = MakeFont('B', new Point(7, 12), new Point(3, 4))
            };

            CheckEqual(new Vector(1, 2), material.CalculateLayoutSize(new Vector(1, 2)));
        }

        public void CalculateLayoutSizeIsNotXAdvance()
        {
            var font = new SpriteFontDefinition();
            font.GlyphDefinitions['A'] = new SpriteFontDefinition.GlyphDefinition
            {
                Size = new Point(7, 12),
                XAdvance = 99
            };

            var material = new GlyphMaterial { Glyph = 'A', Font = font };

            CheckEqual(new Vector(7, 12), material.CalculateLayoutSize(Vector.PositiveInfinity));
        }
    }
}