using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace CutToLength.Forms
{
	public partial class ResultsForm : Form
	{
		public ResultsForm()
		{
			InitializeComponent();

			dataGridView1.RowPostPaint += DataGridView1_RowPostPaint;
		}

		private void DataGridView1_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)
		{
			var grid = sender as DataGridView;
			var rowIdx = (e.RowIndex + 1).ToString();

			var centerFormat = new StringFormat()
			{
				Alignment = StringAlignment.Far,
				LineAlignment = StringAlignment.Center
			};

			var headerBounds = new Rectangle(e.RowBounds.Left, e.RowBounds.Top, grid.RowHeadersWidth - 4, e.RowBounds.Height);
			e.Graphics.DrawString(rowIdx, this.Font, Brushes.Blue, headerBounds, centerFormat);
		}

		private void dataGridView1_RowEnter(object sender, DataGridViewCellEventArgs e)
		{
			var selectedBin = dataGridView1.Rows[e.RowIndex].DataBoundItem as Bin;

			if (selectedBin == null)
				return;

			binLayoutView1.Bin = selectedBin;
			binLayoutView1.Invalidate();

			dataGridView2.DataSource = selectedBin.Items;
		}

		public List<Bin> Bins
		{
			get { return dataGridView1.DataSource as List<Bin>; }
			set { dataGridView1.DataSource = value; }
		}

        private void saveToolStripMenuItem_Click(object sender, EventArgs e)
        {
			var s = new SaveFileDialog();

			var today = DateTime.Today;
			var name = $"{today.Year}-{today.Month.ToString().PadLeft(2, '0')}-{today.Day.ToString().PadLeft(2, '0')} cut list.txt";

			s.FileName = name;
			s.Filter = "Text File|*.txt";
			
			if (s.ShowDialog() != DialogResult.OK)
            {
				return;
            }

			SaveBins(s.FileName);
        }

		private void SaveBins(string file)
		{
			var writer = new StreamWriter(file);
			writer.AutoFlush = true;

			var max = Bins.Max(b => b.Items.Max(i => i.Length.ToString().Length));
			var id = 1;

			foreach (var bin in Bins)
			{
				writer.WriteLine(id++.ToString() + ". " + bin.ToString());

				var groups = bin.Items.GroupBy(i => $"{i.Name} {i.Length}");

				foreach (var group in groups)
				{
					var first = group.First();
					var count = group.Count();
					var length = first.Length.ToString().PadLeft(max);
					var name = first.Name;

					var pcsSingularOrPlural = count == 1 ? "pc" : "pcs";

					writer.WriteLine($"   {count}{pcsSingularOrPlural}  @  {length}\" LG   Tag:{name}");
				}

				writer.WriteLine("---------------------------------------------------------------------");
				writer.WriteLine();
			}

			writer.Close();

			Process.Start(file);
		}
	}
}