using System;
using System.Drawing;
using System.Windows.Forms;
using PKHeX.Core;
using PKHeX.Drawing.Misc;
using static PKHeX.Core.MessageStrings;

namespace PKHeX.WinForms
{
    public partial class QR : Form
    {
        private readonly PKM? pkm;
        private readonly Image icon;
        private Image qr;

        private readonly string[] Lines;
        private string extraText = string.Empty;

        public QR(Image qr, Image icon, params string[] lines)
        {
            InitializeComponent();
            this.qr = qr;
            this.icon = icon;
            Lines = lines;
            splitContainer1.Panel1Collapsed = true;
            RefreshImage();
            ResizeWindow();
        }

        public QR(Image qr, Image icon, PKM pk, params string[] lines)
        {
            InitializeComponent();
            this.qr = qr;
            this.icon = icon;
            Lines = lines;

            pkm = pk;
            // Layer on Text
            if (pkm is PK7 pk7)
                this.qr = ReloadQRData(pk7);
            else
                splitContainer1.Panel1Collapsed = true;

            RefreshImage();
            ResizeWindow();
            splitContainer1.SplitterDistance = 34;
        }

        private void ResizeWindow()
        {
            var img = PB_QR.Image;
            splitContainer1.Height = splitContainer1.Panel1.Height + img.Height;
            splitContainer1.Width = img.Width;
        }

        private Image ReloadQRData(PK7 pk7)
        {
            var box = (int)NUD_Box.Value - 1;
            var slot = (int)NUD_Slot.Value - 1;
            var copies = (int)NUD_Copies.Value;
            extraText = $" (Box {box + 1}, Slot {slot + 1}, {copies} cop{(copies > 1 ? "ies" : "y")})";
            return QREncode.GenerateQRCode7(pk7, box, slot, copies);
        }

        private void RefreshImage()
        {
            SuspendLayout();
            ResumeLayout();
            Font font = !Main.Unicode ? Font : FontUtil.GetPKXFont(8.25f);
            var img = QRImageUtil.GetQRImageExtended(font, qr, icon, Math.Max(qr.Width, 370), qr.Height + 50, Lines, extraText);
            PB_QR.Image = img;
        }

        private void PB_QR_Click(object sender, EventArgs e)
        {
            if (DialogResult.Yes != WinFormsUtil.Prompt(MessageBoxButtons.YesNo, MsgQRClipboardImage))
                return;
            try { Clipboard.SetImage(PB_QR.Image); }
            // Clipboard can be locked periodically, just notify on failure.
            catch { WinFormsUtil.Alert(MsgQRClipboardFail); }
        }

        private void UpdateBoxSlotCopies(object sender, EventArgs e)
        {
            if (pkm is not PK7 pk7)
                throw new ArgumentException("Can't update QR7 if pkm isn't a PK7!");
            qr = ReloadQRData(pk7);
            RefreshImage();
        }
    }
}