using System;
using System.Windows.Forms;
using MuPDF;
using PDFPatcher.Common;

namespace PDFPatcher.Functions.Editor
{
	sealed partial class DocumentInfoForm : Form
	{
		internal Document Document { get; set; }
		internal Model.PdfInfoXmlDocument InfoDocument { get; set; }

		public DocumentInfoForm() {
			InitializeComponent();
			this.OnFirstLoad(OnLoad);
		}

		void OnLoad() {
			if (Document != null) {
				var info = Document.Info;
				_AuthorBox.Text = info.Author;
				_CreationDateBox.Text = Processor.PdfHelper.ParseDateTime(info.CreationDate).ToString();
				_CreatorBox.Text = info.Creator;
				_FilePathBox.Text = Document.FilePath;
				_KeywordsBox.Text = info.Keywords;
				_ModDateBox.Text = Processor.PdfHelper.ParseDateTime(info.ModificationDate).ToString();
				_PageCountBox.Text = Document.PageCount.ToString();
				_ProducerBox.Text = info.Producer;
				_SubjectBox.Text = info.Subject;
				_TitleBox.Text = info.Title;
			}
			if (InfoDocument != null) {
				var info = InfoDocument.InfoNode;
				SetText(_AuthorBox, info.Author);
				SetText(_CreatorBox, info.Creator);
				SetText(_KeywordsBox, info.Keywords);
				SetText(_ProducerBox, info.Producer);
				SetText(_SubjectBox, info.Subject);
				SetText(_TitleBox, info.Title);
			}
			else {
				_OkButton.Enabled = false;
			}
			_OkButton.Click += (s, args) => {
				DialogResult = DialogResult.OK;
				var info = InfoDocument.InfoNode;
				info.Author = _AuthorBox.Text;
				info.Creator = _CreatorBox.Text;
				info.Keywords = _KeywordsBox.Text;
				info.Producer = _ProducerBox.Text;
				info.Subject = _SubjectBox.Text;
				info.Title = _TitleBox.Text;
				Close();
			};
			_CancelButton.Click += (s, args) => {
				DialogResult = DialogResult.Cancel;
				Close();
			};
		}

		static void SetText(Control control, string value) {
			if (value == null) {
				return;
			}
			control.Text = value;
		}
	}
}