using System;
using System.Collections.Generic;
using System.Collections.Immutable;
using System.Collections.ObjectModel;
using System.IO;
using System.Reflection;
using Dashboard.Resources;
using Dashboard.Windowing;

namespace Dashboard.Controls
{
    public enum MessageBoxIcon
    {
        Info,
        Question,
        Warning,
        Error,
        Custom,
    }

    public enum MessageBoxButtons
    {
        AbortRetryIgnore,
        CancelRetryContinue,
        Ok,
        OkCancel,
        RetryCancel,
        YesNo,
        YesNoCancel,
        Custom,
    }

    /// <summary>
    /// A simple message box dialog.
    /// </summary>
    public class MessageBox : Form
    {
        private Image? _icon;
        private Label  _label = new Label();
        private readonly List<Label> _buttons = new List<Label>();

        public MessageBoxIcon Icon { get; set; }
        public Image? CustomImage { get; set; }
        public string? Message { get; set; }
        public MessageBoxButtons Buttons { get; set; }
        public ObservableCollection<string> CustomButtons { get; } = new ObservableCollection<string>();
        public int Result { get; private set; }

        public MessageBox(IWindow window) : base(window)
        {
            SetParent(this, _label);
        }

        public static readonly Image s_questionIcon;
        public static readonly Image s_infoIcon;
        public static readonly Image s_warningIcon;
        public static readonly Image s_errorIcon;

        private static readonly ImmutableList<string> s_abortRetryContinue  = ["Abort", "Retry", "Continue"];
        private static readonly ImmutableList<string> s_cancelRetryContinue = ["Cancel", "Retry", "Continue"];
        private static readonly ImmutableList<string> s_ok = ["OK"];
        private static readonly ImmutableList<string> s_okCancel = ["OK", "Cancel"];
        private static readonly ImmutableList<string> s_retryCancel = ["Retry", "Cancel"];
        private static readonly ImmutableList<string> s_yesNo = ["Yes", "No"];
        private static readonly ImmutableList<string> s_yesNoCancel = ["Yes", "No", "Cancel"];

        static MessageBox()
        {
            Assembly asm = typeof(MessageBox).Assembly;
            using (Stream str = asm.GetManifestResourceStream("Dashboard.Resources.question.png")!)
                s_questionIcon = Image.Load(str);
            using (Stream str = asm.GetManifestResourceStream("Dashboard.Resources.info.png")!)
                s_infoIcon = Image.Load(str);
            using (Stream str = asm.GetManifestResourceStream("Dashboard.Resources.warning.png")!)
                s_warningIcon = Image.Load(str);
            using (Stream str = asm.GetManifestResourceStream("Dashboard.Resources.error.png")!)
                s_errorIcon = Image.Load(str);
        }

        public override void OnPaint()
        {
            base.OnPaint();
        }

        public static MessageBox Create(IWindow window, string message, string title, MessageBoxIcon icon, MessageBoxButtons buttons)
        {
            return new MessageBox(window)
            {
                Message = message,
                Title = title,
                Icon = icon,
                Buttons = buttons,
            };
        }

        // public static MessageBox Create(IWindow window, string message, string title, Image icon, IEnumerable<string> buttons)
        // {
        //     throw new NotImplementedException();
        // }

        private static string GetDefaultTitle(MessageBoxIcon icon)
        {
            return icon switch
            {
                MessageBoxIcon.Error => "Error",
                MessageBoxIcon.Info => "Info",
                MessageBoxIcon.Question => "Question",
                MessageBoxIcon.Warning => "Warning",
                _ => "Message Box",
            };
        }

        private static Image GetDefaultIcon(MessageBoxIcon icon)
        {
            return icon switch
            {
                MessageBoxIcon.Error => s_errorIcon,
                MessageBoxIcon.Question => s_questionIcon,
                MessageBoxIcon.Warning => s_warningIcon,
                _ => s_infoIcon,
            };
        }

        private static ImmutableList<string> GetDefaultButtons(MessageBoxButtons buttons)
        {
            return buttons switch
            {
                MessageBoxButtons.AbortRetryIgnore => s_abortRetryContinue,
                MessageBoxButtons.CancelRetryContinue => s_cancelRetryContinue,
                MessageBoxButtons.OkCancel => s_okCancel,
                MessageBoxButtons.RetryCancel => s_retryCancel,
                MessageBoxButtons.YesNo => s_yesNo,
                MessageBoxButtons.YesNoCancel => s_yesNoCancel,
                _ => s_ok,
            };
        }
    }
}