using System;
using System.IO;
using System.Drawing;
using System.Drawing.Imaging;

namespace Utilities.SetFileAsFolderPicture
{
    class FolderImage
    {
        string folder_path;
        int border_width;
        Color border_color;

        public FolderImage(string path)
        {
            folder_path = path;
            border_width = 0;
        }

        public void SetBorder(int width, Color color)
        {
            border_width = width;
            border_color = color;
        }

        public void SetImage(Image image)
        {
            string albumart_path = Path.Combine(folder_path, "Folder.jpg");
            string smallart_path = Path.Combine(folder_path, "AlbumArtSmall.jpg");
            Size albumart_size = GetSize(image.Size, 200);
            Size smallart_size = GetSize(image.Size, 75);

            Save(image, albumart_size, albumart_path);
            Save(image, smallart_size, smallart_path);
        }

        private Size GetSize(Size image, int size)
        {
            int width = image.Width, height = image.Height;

            if (width > height)
            {
                return new Size(width * (size - border_width) / height + border_width, size);
            }
            else
            {
                return new Size(size, height * (size - border_width) / width + border_width);
            }
        }

        private void Save(Image image, Size size, string path)
        {
            int width = size.Width, height = size.Height;

            Bitmap output = new Bitmap(width, height);

            Graphics graphics = Graphics.FromImage(output);

            graphics.DrawImage(image, border_width, border_width, width - border_width * 2, height - border_width * 2);
            graphics.DrawRectangle(new Pen(border_color, border_width), 0, 0, width, height);

            output.Save(path, ImageFormat.Jpeg);

            File.SetAttributes(path, FileAttributes.Hidden | FileAttributes.System);
        }
    }
}