using System;
using System.Text;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using MonoGame.Extended.Graphics;

namespace MonoGame.Extended.BitmapFonts
{
    public static class BitmapFontExtensions
    {
        /// <summary>
        ///     Adds a string to a batch of sprites for rendering using the specified font, text, position, color, rotation,
        ///     origin, scale, effects and layer.
        /// </summary>
        /// <param name="spriteBatch"></param>
        /// <param name="bitmapFont">A font for displaying text.</param>
        /// <param name="text">The text message to display.</param>
        /// <param name="position">The location (in screen coordinates) to draw the text.</param>
        /// <param name="color">
        ///     The <see cref="Color" /> to tint a sprite. Use <see cref="Color.White" /> for full color with no
        ///     tinting.
        /// </param>
        /// <param name="rotation">Specifies the angle (in radians) to rotate the text about its origin.</param>
        /// <param name="origin">The origin for each letter; the default is (0,0) which represents the upper-left corner.</param>
        /// <param name="scale">Scale factor.</param>
        /// <param name="effect">Effects to apply.</param>
        /// <param name="layerDepth">
        ///     The depth of a layer. By default, 0 represents the front layer and 1 represents a back layer.
        ///     Use SpriteSortMode if you want sprites to be sorted during drawing.
        /// </param>
        /// <param name="clippingRectangle">Clips the boundaries of the text so that it's not drawn outside the clipping rectangle</param>
        public static void DrawString(this SpriteBatch spriteBatch, BitmapFont bitmapFont, string text, Vector2 position,
            Color color, float rotation, Vector2 origin, Vector2 scale, SpriteEffects effect, float layerDepth, Rectangle? clippingRectangle = null)
        {
            if (text == null)
                throw new ArgumentNullException(nameof(text));
            if (effect != SpriteEffects.None)
                throw new NotSupportedException($"{effect} is not currently supported for {nameof(BitmapFont)}");

            var glyphs = bitmapFont.GetGlyphs(text, position);
            foreach (var glyph in glyphs)
            {
                if (glyph.Character == null)
                    continue;
                var characterOrigin = position - glyph.Position + origin;
                spriteBatch.Draw(glyph.Character.TextureRegion, position, color, rotation, characterOrigin, scale, effect, layerDepth, clippingRectangle);
            }
        }

        public static void DrawString(this SpriteBatch spriteBatch, BitmapFont bitmapFont, StringBuilder text, Vector2 position,
            Color color, float rotation, Vector2 origin, Vector2 scale, SpriteEffects effect, float layerDepth, Rectangle? clippingRectangle = null)
        {
            if (text == null)
                throw new ArgumentNullException(nameof(text));
            if (effect != SpriteEffects.None)
                throw new NotSupportedException($"{effect} is not currently supported for {nameof(BitmapFont)}");

            var glyphs = bitmapFont.GetGlyphs(text, position);
            foreach (var glyph in glyphs)
            {
                if (glyph.Character == null)
                    continue;
                var characterOrigin = position - glyph.Position + origin;
                spriteBatch.Draw(glyph.Character.TextureRegion, position, color, rotation, characterOrigin, scale, effect, layerDepth, clippingRectangle);
            }
        }

        /// <summary>
        ///     Adds a string to a batch of sprites for rendering using the specified font, text, position, color, rotation,
        ///     origin, scale, effects and layer.
        /// </summary>
        /// <param name="spriteBatch"></param>
        /// <param name="font">A font for displaying text.</param>
        /// <param name="text">The text message to display.</param>
        /// <param name="position">The location (in screen coordinates) to draw the text.</param>
        /// <param name="color">
        ///     The <see cref="Color" /> to tint a sprite. Use <see cref="Color.White" /> for full color with no
        ///     tinting.
        /// </param>
        /// <param name="rotation">Specifies the angle (in radians) to rotate the text about its origin.</param>
        /// <param name="origin">The origin for each letter; the default is (0,0) which represents the upper-left corner.</param>
        /// <param name="scale">Scale factor.</param>
        /// <param name="effect">Effects to apply.</param>
        /// <param name="layerDepth">
        ///     The depth of a layer. By default, 0 represents the front layer and 1 represents a back layer.
        ///     Use SpriteSortMode if you want sprites to be sorted during drawing.
        /// </param>
        /// <param name="clippingRectangle">Clips the boundaries of the text so that it's not drawn outside the clipping rectangle</param>
        public static void DrawString(this SpriteBatch spriteBatch, BitmapFont font, string text, Vector2 position,
            Color color, float rotation, Vector2 origin, float scale, SpriteEffects effect, float layerDepth, Rectangle? clippingRectangle = null)
        {
            spriteBatch.DrawString(font, text, position, color, rotation, origin, new Vector2(scale, scale), effect, layerDepth, clippingRectangle);
        }

        public static void DrawString(this SpriteBatch spriteBatch, BitmapFont font, StringBuilder text, Vector2 position,
            Color color, float rotation, Vector2 origin, float scale, SpriteEffects effect, float layerDepth, Rectangle? clippingRectangle = null)
        {
            spriteBatch.DrawString(font, text, position, color, rotation, origin, new Vector2(scale, scale), effect, layerDepth, clippingRectangle);
        }

        /// <summary>
        ///     Adds a string to a batch of sprites for rendering using the specified font, text, position, color, layer,
        ///     and width (in pixels) where to wrap the text at.
        /// </summary>
        /// <remarks>
        ///     <see cref="BitmapFont" /> objects are loaded from the Content Manager. See the <see cref="BitmapFont" /> class for
        ///     more information.
        ///     Before any calls to this method you must call <see cref="SpriteBatch.Begin" />. Once all calls 
        ///     are complete, call <see cref="SpriteBatch.End" />.
        ///     Use a newline character (\n) to draw more than one line of text.
        /// </remarks>
        /// <param name="spriteBatch"></param>
        /// <param name="font">A font for displaying text.</param>
        /// <param name="text">The text message to display.</param>
        /// <param name="position">The location (in screen coordinates) to draw the text.</param>
        /// <param name="color">
        ///     The <see cref="Color" /> to tint a sprite. Use <see cref="Color.White" /> for full color with no
        ///     tinting.
        /// </param>
        /// <param name="layerDepth">
        ///     The depth of a layer. By default, 0 represents the front layer and 1 represents a back layer.
        ///     Use SpriteSortMode if you want sprites to be sorted during drawing.
        /// </param>
        /// <param name="clippingRectangle">Clips the boundaries of the text so that it's not drawn outside the clipping rectangle</param>
        public static void DrawString(this SpriteBatch spriteBatch, BitmapFont font, string text, Vector2 position, Color color, float layerDepth, Rectangle? clippingRectangle = null)
        {
            spriteBatch.DrawString(font, text, position, color, rotation: 0, origin: Vector2.Zero, scale: Vector2.One, effect: SpriteEffects.None,
                layerDepth: layerDepth, clippingRectangle: clippingRectangle);
        }

        /// <summary>
        ///     Adds a string to a batch of sprites for rendering using the specified font, text, position, color,
        ///     and width (in pixels) where to wrap the text at. The text is drawn on layer 0f.
        /// </summary>
        /// <param name="spriteBatch"></param>
        /// <param name="font">A font for displaying text.</param>
        /// <param name="text">The text message to display.</param>
        /// <param name="position">The location (in screen coordinates) to draw the text.</param>
        /// <param name="color">
        ///     The <see cref="Color" /> to tint a sprite. Use <see cref="Color.White" /> for full color with no
        ///     tinting.
        /// </param>
        /// <param name="clippingRectangle">Clips the boundaries of the text so that it's not drawn outside the clipping rectangle</param>
        public static void DrawString(this SpriteBatch spriteBatch, BitmapFont font, string text, Vector2 position, Color color, Rectangle? clippingRectangle = null)
        {
            spriteBatch.DrawString(font, text, position, color, rotation: 0, origin: Vector2.Zero, scale: Vector2.One, effect: SpriteEffects.None,
                layerDepth: 0, clippingRectangle: clippingRectangle);
        }

        public static void DrawString(this SpriteBatch spriteBatch, BitmapFont font, StringBuilder text, Vector2 position, Color color, Rectangle? clippingRectangle = null)
        {
            spriteBatch.DrawString(font, text, position, color, rotation: 0, origin: Vector2.Zero, scale: Vector2.One, effect: SpriteEffects.None,
                layerDepth: 0, clippingRectangle: clippingRectangle);
        }
    }
}