using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace TestVideo
{
    internal class Extraction
    {
        private List<Zone> _zones;
        private Screen _currentScreen;
        private Bitmap _screenPreview;

        public Screen CurrentScreen { get => _currentScreen; set => _currentScreen = value; }
        public List<Zone> Zones { get => _zones; private set => _zones = value; }
        public Bitmap ScreenPreview { get => _screenPreview; set => _screenPreview = value; }

        public Extraction(Screen screen)
        {
            CurrentScreen = screen;
        }
        public Extraction(List<Zone> zones)
        {
            Zones = zones;
        }

        public void UpdateZones()
        {
            ScreenPreview = ScreenShot();
            DrawZones();
            foreach (Zone zone in Zones)
            {
                Bitmap bmpData = ScreenPreview.Clone(zone.ZoneArea, ScreenPreview.PixelFormat);
                zone.Update(bmpData);
            }
        }
        public void ChangeScreen(Screen newScreen)
        {
            if (newScreen != CurrentScreen)
                CurrentScreen = newScreen;

            //This makes sure that if you go from a screen with smaller dimensions only the zones that are valid for it stays
            List<Zone> newZones = new List<Zone>();
            foreach (Zone zone in newZones)
            {
                if (IsZoneInBounds(zone.ZoneArea))
                    newZones.Add(zone);
            }
            Zones = newZones;

            ScreenPreview = ScreenShot();
        }
        public List<string> GetZonesNames()
        {
            List<string> zoneNames = new List<string>();
            foreach (Zone zone in Zones)
            {
                zoneNames.Add(zone.Name);
            }
            return zoneNames;
        }
        public void AddZone(Rectangle zoneArea,Zone.ZoneType type,string name)
        {
            if (!IsZoneInBounds(zoneArea))
                throw new ArgumentException("Rectangle is outside the screen");

            Zones.Add(new Zone(zoneArea,type,name));
        }
        public void RemoveZone(int idZone)
        {
            Zones.RemoveAt(idZone);
        }

        public Rectangle GetZoneArea(int idZone)
        {
            return Zones[idZone].ZoneArea;
        }

        public Bitmap GetZoneData(int idZone)
        {
            return Zones[idZone].ZoneData;
        }

        public string GetZoneRawText(int idZone)
        {
            return Zones[idZone].RawText;
        }
        public string[] GetZonesCleanText(int idZone)
        {
            return Zones[idZone].CleanText;
        }
        private Bitmap ScreenShot()
        {
            Bitmap screenshot;
            screenshot = new Bitmap(CurrentScreen.Bounds.Width, CurrentScreen.Bounds.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
            // Create a graphics object from the bitmap
            Graphics gfxScreenshot = Graphics.FromImage(screenshot);
            // Take the screenshot from the upper left corner to the right bottom corner
            gfxScreenshot.CopyFromScreen(
                CurrentScreen.Bounds.X,
                CurrentScreen.Bounds.Y,
                0,
                0,
                CurrentScreen.Bounds.Size,
                CopyPixelOperation.SourceCopy);
            return screenshot;
        }
        public void DrawZones()
        {
            using (Graphics g = Graphics.FromImage(ScreenPreview))
            {
                foreach (Zone zone in Zones)
                {
                    g.DrawRectangle(new Pen(Color.Red,3),zone.ZoneArea);
                }
            }
        }
        private string SaveScreenshot(Bitmap image)
        {
            //This method is now quite old. If you plan to use it I would recommand rewriting it
            string path = "";
            string directory = AppDomain.CurrentDomain.BaseDirectory + "Screens";
            path = directory + "\\Screenshot" + DateTime.Now.ToString("yyyy_MM_dd-hh_mm_ss") + ".png";
            if (Directory.Exists(directory))
            {
                image.Save(path, ImageFormat.Png);
            }
            else
            {
                Directory.CreateDirectory(AppDomain.CurrentDomain.BaseDirectory + "\\Screens");
            }
            return path;
        }
        private bool IsZoneInBounds(Rectangle zoneArea)
        {
            bool result = true;
            //Check that the position of the zone is possible
            if (zoneArea.X < 0 || zoneArea.X >= CurrentScreen.Bounds.Width)
                result = false;
            if (zoneArea.Y < 0 || zoneArea.Y >= CurrentScreen.Bounds.Width)
                result = false;
            //Check that the zone does'nt go outside the bounds of the Screen
            if (zoneArea.X + zoneArea.Width >= CurrentScreen.Bounds.Width)
                result = false;
            if (zoneArea.Y + zoneArea.Height >= CurrentScreen.Bounds.Height)
                result = false;

            return result;
        }
    }
}