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

namespace CarManagerV3.Forms
{
    public partial class SettingsForm : Form
    {
        // Settings map (Maps settings to controls and default values + optional change event handler function that takes previous and new value)
        private Dictionary<string, (Control control, string defaultValue, Action<string, string> onChange)> settingsMap = new Dictionary<string, (Control control, string defaultValue, Action<string, string> onChange)>();

        public SettingsForm()
        {
            InitializeComponent();
            initializeSettingsMap();
        }

        private void initializeSettingsMap()
        {
            // Initialize the settings map with setting keys, associated controls, default values, and optional change event handlers
            settingsMap["DataLocation"] = (tbxDataLocation, Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) + "\\CarManagerV3", (string before, string after) =>
            {
                // TODO
            }
            );

        }

        private void SettingsForm_Load(object sender, EventArgs e)
        {
            loadSettings();
        }

        private void loadSettings()
        {
            // with settings map
            foreach (var setting in settingsMap)
            {
                string key = setting.Key;
                Control control = setting.Value.control;
                string value = Properties.Settings.Default[key]?.ToString() ?? string.Empty;
                control.Text = value;
            }
        }

        private void saveSettings()
        {
            // Save settings using the settings map
            foreach (var setting in settingsMap)
            {
                string key = setting.Key;
                Control control = setting.Value.control;
                string value = control.Text;
                string oldValue = Properties.Settings.Default[key]?.ToString() ?? string.Empty;
                // Save the value to application settings
                Properties.Settings.Default[key] = value;
                // Invoke the change event handler if it exists and the value has changed
                if (setting.Value.onChange != null && oldValue != value)
                {
                    setting.Value.onChange(oldValue, value);
                }
            }
            Properties.Settings.Default.Save();
        }

        private void resetSettings()
        {
            DialogResult confirmReset = MessageBox.Show("Are you sure you want to reset all settings to their default values? This action cannot be undone.", "Confirm Reset", MessageBoxButtons.YesNo, MessageBoxIcon.Warning);
            if(confirmReset != DialogResult.Yes)
            {
                return;
            }
            // Reset settings to default values using the settings map
            foreach (var setting in settingsMap)
            {
                string key = setting.Key;
                string defaultValue = setting.Value.defaultValue;
                // Reset the value to default in application settings
                Properties.Settings.Default[key] = defaultValue;
            }
            Properties.Settings.Default.Save();
            loadSettings();
        }

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

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

        private void btnReset_Click(object sender, EventArgs e)
        {
            resetSettings();
        }
    }
}