using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using EchoChamber.Library;

namespace EchoChamber.Win
{
    public partial class Generator : Form
    {
        public Generator()
        {
            InitializeComponent();
        }

        private void Generator_Load(object sender, EventArgs e)
        {
            LoadFiles();
        }

        private void loadButton_Click(object sender, EventArgs e)
        {
            LoadFiles();
        }

        private void LoadFiles()
        {
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Multiselect = true;
            ofd.Title = "Select Index Files";
            if (ofd.ShowDialog() != DialogResult.OK)
            {
                return;
            }

            foreach (string filename in ofd.FileNames)
            {
                Indexer indexer = Indexer.Load(filename);
                sourceList.Items.Add(indexer);
            }
        }

        private void generateButton_Click(object sender, EventArgs e)
        {
            List<Indexer> sourceIndexers = new List<Indexer>();
            foreach (Indexer selectedIndexer in sourceList.SelectedItems)
            {
                sourceIndexers.Add(selectedIndexer);
            }

            if (sourceIndexers.Count == 0)
            {
                return;
            }

            Indexer generationIndexer;
            if (sourceIndexers.Count == 1)
            {
                generationIndexer = sourceIndexers[0];
            }
            else
            {
                generationIndexer = Indexer.Merge(sourceIndexers.ToArray());
                sourceList.Items.Add(generationIndexer);
                sourceList.SelectedItems.Clear();
                sourceList.SelectedItem = generationIndexer;
            }

            outputBox.Text = generationIndexer.Generate(int.Parse(maxTermsBox.Text), int.Parse(prefixLengthBox.Text), initialText.Text);
        }
    }
}