using System;
using System.Windows.Forms;

namespace NBTExplorer.Windows
{
    public static class FormHandlers
    {
        public static void Register ()
        {
            FormRegistry.EditByteArray = EditByteArrayHandler;
            FormRegistry.EditString = EditStringHandler;
            FormRegistry.EditTagScalar = EditTagScalarValueHandler;
            FormRegistry.RenameTag = RenameTagHandler;
            FormRegistry.CreateNode = CreateNodeHandler;

            FormRegistry.MessageBox = MessageBoxHandler;
        }

        public static void MessageBoxHandler (string message)
        {
            MessageBox.Show(message);
        }

        public static bool EditStringHandler (StringFormData data)
        {
            EditString form = new EditString(data.Value);
            if (form.ShowDialog() == DialogResult.OK) {
                data.Value = form.StringValue;
                return true;
            }
            else
                return false;
        }

        public static bool RenameTagHandler (RestrictedStringFormData data)
        {
            EditName form = new EditName(data.Value);
            form.InvalidNames.AddRange(data.RestrictedValues);

            if (form.ShowDialog() == DialogResult.OK && form.IsModified) {
                data.Value = form.TagName;
                return true;
            }
            else
                return false;
        }

        public static bool EditTagScalarValueHandler (TagScalarFormData data)
        {
            EditValue form = new EditValue(data.Tag);
            if (form.ShowDialog() == DialogResult.OK)
                return true;
            else
                return false;
        }

        public static bool EditByteArrayHandler (ByteArrayFormData data)
        {
            HexEditor form = new HexEditor(data.NodeName, data.Data, data.BytesPerElement);
            if (form.ShowDialog() == DialogResult.OK && form.Modified) {
                Array.Copy(form.Data, data.Data, data.Data.Length);
                return true;
            }
            else
                return false;
        }

        public static bool CreateNodeHandler (CreateTagFormData data)
        {
            CreateNodeForm form = new CreateNodeForm(data.TagType, data.HasName);
            form.InvalidNames.AddRange(data.RestrictedNames);

            if (form.ShowDialog() == DialogResult.OK) {
                data.TagNode = form.TagNode;
                data.TagName = form.TagName;
                return true;
            }
            else
                return false;
        }
    }
}