using System;
using System.IO;
using System.Windows.Forms;

namespace drop_location
{
    public partial class Form1 : Form
    {
        // Add OpenFileDialog to the form class
        private OpenFileDialog openFile = new OpenFileDialog();

        public Form1()
        {
            InitializeComponent();

            // Optional: Configure the OpenFileDialog
            openFile.Filter = "Text Files (*.txt)|*.txt|All Files (*.*)|*.*";
            openFile.Title = "Select a File";
        }

        // The GetFileName method gets a filename from the user
        private bool GetFileName(out string selectedFile)
        {
            if (openFile.ShowDialog() == DialogResult.OK)
            {
                selectedFile = openFile.FileName;
                return true;
            }
            else
            {
                selectedFile = "";
                return false;
            }
        }

        // The LoadFileContents method loads file contents into the ListBox
        private void LoadFileContents(string filename)
        {
            try
            {
                string lineContent;

                // Clear the ListBox first
                listBox1.Items.Clear();

                // Read the file
                using (StreamReader inputFile = File.OpenText(filename))
                {
                    while (!inputFile.EndOfStream)
                    {
                        lineContent = inputFile.ReadLine();

                        // Only add non-empty lines (optional)
                        if (!string.IsNullOrWhiteSpace(lineContent))
                        {
                            listBox1.Items.Add(lineContent);
                        }
                    }
                }

                // Optional: Show success message or update status
                if (listBox1.Items.Count > 0)
                {
                    MessageBox.Show($"Successfully loaded {listBox1.Items.Count} items.",
                                  "File Loaded",
                                  MessageBoxButtons.OK,
                                  MessageBoxIcon.Information);
                }
                else
                {
                    MessageBox.Show("The file is empty.",
                                  "No Data",
                                  MessageBoxButtons.OK,
                                  MessageBoxIcon.Warning);
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show($"Error loading file: {ex.Message}",
                              "Error",
                              MessageBoxButtons.OK,
                              MessageBoxIcon.Error);
            }
        }

        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            // Optional: Add functionality when an item is selected
            if (listBox1.SelectedItem != null)
            {
                // For example, display the selected item in a label or textbox
                // labelSelectedItem.Text = $"Selected: {listBox1.SelectedItem}";
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            // Load file button click
            string filename;

            if (GetFileName(out filename))
            {
                LoadFileContents(filename);
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            // Optional: Initialize form properties
            listBox1.SelectionMode = SelectionMode.One;

            // Set button text for clarity
            button1.Text = "Load File";
            button2.Text = "Exit";

            // Optional: Set form title
            this.Text = "Drop Location - File Viewer";
        }

        // Optional: Add method to clear the ListBox
        private void ClearListBox()
        {
            listBox1.Items.Clear();
        }

        // Optional: Add method to save ListBox contents to a file
        private void SaveListBoxContents()
        {
            SaveFileDialog saveFile = new SaveFileDialog();
            saveFile.Filter = "Text Files (*.txt)|*.txt|All Files (*.*)|*.*";
            saveFile.Title = "Save ListBox Contents";

            if (saveFile.ShowDialog() == DialogResult.OK)
            {
                try
                {
                    using (StreamWriter outputFile = new StreamWriter(saveFile.FileName))
                    {
                        foreach (var item in listBox1.Items)
                        {
                            outputFile.WriteLine(item.ToString());
                        }
                    }
                    MessageBox.Show("File saved successfully!",
                                  "Success",
                                  MessageBoxButtons.OK,
                                  MessageBoxIcon.Information);
                }
                catch (Exception ex)
                {
                    MessageBox.Show($"Error saving file: {ex.Message}",
                                  "Error",
                                  MessageBoxButtons.OK,
                                  MessageBoxIcon.Error);
                }
            }
        }

        // Optional: Add a third button for saving
        private void button3_Click(object sender, EventArgs e)
        {
            SaveListBoxContents();
        }
    }
}