using System.Drawing;

using Microsoft.Extensions.Logging;

namespace File_Folder_Helper.ADO2025.PI6;

internal static partial class Helper20250705 {

    internal static void ExportFaces(ILogger<Worker> logger, List<string> args) {
        string checkFile;
        logger.LogInformation(args[0]);
        logger.LogInformation(args[1]);
        logger.LogInformation(args[2]);
        logger.LogInformation(args[3]);
        logger.LogInformation(args[4]);
        logger.LogInformation(args[5]);
        logger.LogInformation(args[6]);
        logger.LogInformation(args[7]);
        string locationDigits = args[6];
        string[] mp = args[4].Split('~');
        string[] mwg = args[5].Split('~');
        string[] xyz = args[3].Split(',');
        string[] fileNames = args[2].Split('~');
        string[] wholePercentages = args[7].Split('~');
        string sourceDirectory = Path.GetFullPath(args[0].Split('~')[0]);
        if (mp.Length != mwg.Length || mp.Length != wholePercentages.Length) {
            logger.LogWarning("Lengths don't match!");
        } else {
            foreach (string fileName in fileNames) {
                checkFile = Path.Combine(sourceDirectory, fileName);
                if (!File.Exists(checkFile)) {
                    logger.LogWarning("<{file}> doesn't exist!", args[2]);
                    continue;
                }
                for (int i = 0; i < mp.Length; i++) {
                    if (wholePercentages[i].StartsWith("x-")) {
                        logger.LogWarning("Skipping {wholePercentages}", wholePercentages[i]);
                        continue;
                    }
                    Ext(checkFile, xyz, i, mp[i], mwg[i], locationDigits, wholePercentages[i]);
                }
            }
        }
    }

    private static void Ext(string checkFile, string[] xyz, int i, string mp, string mwg, string locationDigits, string wholePercentages) {
        int width = int.Parse(xyz[0]);
        int height = int.Parse(xyz[1]);
        string[] mpValues = mp.Split(',');
        string[] mwgValues = mwg.Split(',');
        float mpWidth = float.Parse(mpValues[2]) * width;
        float mpHeight = float.Parse(mpValues[3]) * height;
        double mpLeft = (float.Parse(mpValues[0]) * width) - (mpWidth * .5);
        double mpTop = (float.Parse(mpValues[1]) * height) - (mpHeight * .5);
        Extract(file: checkFile,
                width: mpWidth,
                height: mpHeight,
                left: mpLeft,
                top: mpTop,
                suffix: $"-{i}mp.jpg");
        float mwgWidth = float.Parse(mwgValues[2]) * width;
        float mwgHeight = float.Parse(mwgValues[3]) * height;
        double mwgLeft = double.Parse(mwgValues[0]) * width;
        double mwgTop = double.Parse(mwgValues[1]) * height;
        Extract(file: checkFile,
                width: mwgWidth,
                height: mwgHeight,
                left: mwgLeft,
                top: mwgTop,
                suffix: $"-{i}mwg.jpg");
        int length = (int.Parse(locationDigits) - 1) / 4;
        string[] segments =
        [
            wholePercentages[..1],
            wholePercentages.Substring(1, length),
            wholePercentages.Substring(3, length),
            wholePercentages.Substring(5, length),
            wholePercentages.Substring(7, length)
        ];
        if (string.Join(string.Empty, segments) == wholePercentages) {
            if (int.TryParse(segments[1], out int xWholePercent)
                && int.TryParse(segments[2], out int yWholePercent)
                && int.TryParse(segments[3], out int wWholePercent)
                && int.TryParse(segments[4], out int hWholePercent)) {
                float factor = 100;
                RectangleF rectangleF = new(xWholePercent / factor, yWholePercent / factor, wWholePercent / factor, hWholePercent / factor);
                float rectangleFWidth = rectangleF.Width * width;
                float rectangleFHeight = rectangleF.Height * height;
                double rectangleFLeft = rectangleF.Left * width;
                double rectangleFTop = rectangleF.Top * height;
                Extract(file: checkFile,
                        width: rectangleFWidth,
                        height: rectangleFHeight,
                        left: rectangleFLeft,
                        top: rectangleFTop,
                        suffix: $"-{i}whole-percentages.jpg");
            }
        }
    }

    private static void Extract(string file, float width, float height, double left, double top, string suffix) {
        RectangleF rectangle = new((float)left, (float)top, width, height);
        using (Bitmap source = new(file)) {
            using (Bitmap bitmap = new((int)width, (int)height)) {
                using (Graphics graphics = Graphics.FromImage(bitmap))
                    graphics.DrawImage(source, new RectangleF(0, 0, width, height), rectangle, GraphicsUnit.Pixel);
                bitmap.Save($"{file}{suffix}");
            }
        }
    }
}