using RecrownedAthenaeum.SpecialTypes;

namespace RecrownedAthenaeum.ContentSystem.ContentResolvers
{
    class ResolutionContentResolver : IContentPathModifier
    {
        int width, height;
        bool updated;
        Resolution bestResolution;

        public int Width
        {
            get
            {
                return width;
            }

            set
            {
                updated = true;
                width = value;
            }
        }

        public int Height
        {
            get
            {
                return height;
            }

            set
            {
                updated = true;
                height = value;
            }
        }

        Resolution[] resolutions = {
             new Resolution(1920, 1080),
             new Resolution(2560, 1440),
             new Resolution(3840, 2160)
        };
        
        Resolution ChooseRounded()
        {
            updated = false;
            Resolution best = resolutions[0];

            int leastDifference = -1;

            int w = Width, h = Height;

            if (w > h)
            {
                for (int i = 0; i < resolutions.Length; i++)
                {
                    int currentDiff = h - resolutions[i].Height;

                    if (currentDiff < 0)
                    {
                        currentDiff = currentDiff * -1;
                    }

                    if ((currentDiff < leastDifference) || leastDifference == -1)
                    {
                        best = resolutions[i];
                        leastDifference = currentDiff;
                    }
                }
            }
            else
            {
                for (int i = 0; i < resolutions.Length; i++)
                {
                    int currentDiff = w - resolutions[i].Width;

                    if (currentDiff < 0)
                    {
                        currentDiff = currentDiff * -1;
                    }

                    if (currentDiff < leastDifference || leastDifference == -1)
                    {
                        best = resolutions[i];
                        leastDifference = currentDiff;
                    }
                }
            }
            return best;
        }

        public string Modify(string path)
        {
            if (updated)
            {
                bestResolution = ChooseRounded();
            }
            return bestResolution + "/" + path;
        }
    }
}