using System;
using System.Drawing;
using System.IO;
using System.Windows.Forms;
using pk3DS.Core.CTR;

namespace pk3DS.WinForms;

public partial class MapPermView : Form
{
    public MapPermView()
    {
        InitializeComponent();
        MapMatrixes = Directory.GetFiles("mapMatrix");
        MapGRs = Directory.GetFiles("mapGR");
    }

    private readonly string[] MapMatrixes;
    private readonly string[] MapGRs;
    private int mapScale = -1;
    public int DrawMap = -1;

    public void SetMap(int Map)
    {
        DrawMap = Map;
        PB_Map.Image = CHK_AutoDraw.Checked ? GetMapImage(sliceArea: true) : null;
    }

    public Bitmap GetMapImage(bool crop = false, bool entity = true, bool sliceArea = false)
    {
        // Load MM
        byte[][] MM = Mini.UnpackMini(File.ReadAllBytes(MapMatrixes[DrawMap]), "MM");
        var mm = OWSE.mm = new MapMatrix(MM);

        // Unknown
        if (ModifierKeys == Keys.Control)
            Clipboard.SetText(mm.Unk2String());

        // Load GR TileMaps
        for (int i = 0; i < mm.EntryList.Length; i++)
        {
            if (mm.EntryList[i] == 0xFFFF) // Mystery Zone
                continue;
            byte[][] GR = Mini.UnpackMini(File.ReadAllBytes(MapGRs[mm.EntryList[i]]), "GR");
            mm.Entries[i] = new MapMatrix.Entry(GR[0]) { coll = new MapMatrix.Collision(GR[2]) };
        }
        mapScale = Math.Max(1, (int)NUD_Scale.Value);
        Bitmap img = mm.Preview(mapScale, (int)NUD_Flavor.Value);

        baseImage = (Bitmap)img.Clone();

        if (sliceArea && mapScale > 3)
        {
            int area = 40 * mapScale;
            for (int x = 0; x < img.Width; x++)
            {
                for (int y = 0; y < img.Height; y++)
                {
                    if (x % area == 0 || y % area == 0)
                        img.SetPixel(x, y, Color.FromArgb(0x10, 0xFF, 0, 0));
                }
            }
        }

        if (entity && mapScale == 8)
            img = OverlayEntities(img);

        if (crop)
            img = WinFormsUtil.TrimBitmap(img);

        return img;
    }

    internal static Bitmap baseImage;

    private Bitmap OverlayEntities(Bitmap img)
    {
        const float opacity = 0.66f;
        // Overlay every... overworld entity
        foreach (var e in OWSE.CurrentZone.Entities.Furniture)
        {
            int x = e.X;
            int y = e.Y;
            for (int sx = 0; sx < e.WX; sx++) // Stretch X
            {
                for (int sy = 0; sy < e.WY; sy++) // Stretch Y
                {
                    try { WinFormsUtil.LayerImage(img, Properties.Resources.F, (x + sx) * mapScale, (y + sy) * mapScale, opacity); }
                    catch { }
                }
            }
        }
        foreach (var e in OWSE.CurrentZone.Entities.NPCs)
        {
            int x = e.X;
            int y = e.Y;
            try { WinFormsUtil.LayerImage(img, Properties.Resources.N, x * mapScale, y * mapScale, opacity); }
            catch { }
        }
        foreach (var e in OWSE.CurrentZone.Entities.Warps)
        {
            int x = (int)e.PX; // shifted warps look weird
            int y = (int)e.PY; // shifted warps look weird
            for (int sx = 0; sx < e.Width; sx++) // Stretch X
            {
                for (int sy = 0; sy < e.Height; sy++) // Stretch Y
                {
                    try { WinFormsUtil.LayerImage(img, Properties.Resources.W, (x + sx) * mapScale, (y + sy) * mapScale, opacity); }
                    catch { }
                }
            }
        }
        foreach (var e in OWSE.CurrentZone.Entities.Triggers1)
        {
            int x = e.X;
            int y = e.Y;
            for (int sx = 0; sx < e.Width; sx++) // Stretch X
            {
                for (int sy = 0; sy < e.Height; sy++) // Stretch Y
                {
                    try { WinFormsUtil.LayerImage(img, Properties.Resources.T1, (x + sx) * mapScale, (y + sy) * mapScale, opacity); }
                    catch { }
                }
            }
        }
        foreach (var e in OWSE.CurrentZone.Entities.Triggers2)
        {
            int x = e.X;
            int y = e.Y;
            for (int sx = 0; sx < e.Width; sx++) // Stretch X
            {
                for (int sy = 0; sy < e.Height; sy++) // Stretch Y
                {
                    try { WinFormsUtil.LayerImage(img, Properties.Resources.T2, (x + sx) * mapScale, (y + sy) * mapScale, opacity); }
                    catch { }
                }
            }
        }

        // Overlay Map Data
        // Flyto
        {
            int x = (int)OWSE.CurrentZone.ZD.PX2;
            int y = (int)OWSE.CurrentZone.ZD.PY2;
            for (int sx = 0; sx < 1; sx++) // Stretch X
            {
                for (int sy = 0; sy < 1; sy++) // Stretch Y
                {
                    try { WinFormsUtil.LayerImage(img, Properties.Resources.FLY, (x + sx) * mapScale, (y + sy) * mapScale, opacity / 2); }
                    catch { }
                }
            }
        }
        // Unknown
        //{
        //    using(var g = Graphics.FromImage(img))
        //        foreach (var l in OWSE.mm.LoadLines)
        //            try { g.DrawLine(new Pen(Color.Red, 4), l.p2 * mapScale, l.p1 * mapScale, l.p4 * mapScale, l.p3 * mapScale); }
        //            catch {}
        //}

        return img;
    }

    // UI
    private void HoverMap(object sender, MouseEventArgs e)
    {
        if (mapScale < 0)
            return;

        if (PB_Map.Image == null)
            return;

        int X = e.X / mapScale;
        int Y = e.Y / mapScale;

        int entryX = X / 40;
        int entryY = Y / 40;

        int entry = (entryY * (PB_Map.Image.Width / 40 / mapScale)) + entryX;
        int epX = X % 40;
        int epY = Y % 40;
        int tile = (epY * 40) + epX;
        try
        {
            var tileVal = OWSE.mm.Entries[entry] == null
                ? "No Tile"
                : OWSE.mm.Entries[entry].Tiles[tile].ToString("X8");

            L_MapCoord.Text = string.Format("V:0x{3}{2}X:{0,3}  Y:{1,3}", X, Y, Environment.NewLine, tileVal);
        }
        catch { }
    }

    private void B_Redraw_Click(object sender, EventArgs e)
    {
        if (DrawMap != -1)
            PB_Map.Image = GetMapImage(sliceArea: true);
    }

    private void MapPermView_FormClosing(object sender, FormClosingEventArgs e)
    {
        CHK_AutoDraw.Checked = false;
        Hide();
        e.Cancel = true;
    }

    private void FocusPanel(object sender, EventArgs e)
    {
        if (ContainsFocus)
            PAN_MAP.Focus();
    }

    private void DclickMap(object sender, EventArgs e)
    {
        DialogResult dr = WinFormsUtil.Prompt(MessageBoxButtons.YesNoCancel, "Copy image to Clipboard?",
            "Yes: Map & Overworlds" + Environment.NewLine + "No: Map Only");
        if (dr == DialogResult.No) // Map Only
            Clipboard.SetImage(WinFormsUtil.TrimBitmap(baseImage));
        if (dr == DialogResult.Yes)
            Clipboard.SetImage(PB_Map.Image);
    }
}