using System.Collections.Generic;
using System.Linq;
using Telegram.Bot.Types;

namespace TelegramBotBase.Commands;

public static class Extensions
{
    /// <summary>
    ///     Adding the command with a description.
    /// </summary>
    /// <param name="cmds"></param>
    /// <param name="command"></param>
    /// <param name="description"></param>
    public static void Add(this Dictionary<BotCommandScope, List<BotCommand>> cmds, string command,
                           string description, BotCommandScope scope = null)
    {
        if (scope == null)
        {
            scope = BotCommandScope.Default();
        }

        var item = cmds.FirstOrDefault(a => a.Key.Type == scope.Type);

        if (item.Value != null)
        {
            item.Value.Add(new BotCommand { Command = command, Description = description });
        }
        else
        {
            cmds.Add(scope, new List<BotCommand> { new() { Command = command, Description = description } });
        }
    }

    /// <summary>
    ///     Adding the command with a description.
    /// </summary>
    /// <param name="cmds"></param>
    /// <param name="command"></param>
    /// <param name="description"></param>
    public static void Clear(this Dictionary<BotCommandScope, List<BotCommand>> cmds, BotCommandScope scope = null)
    {
        if (scope == null)
        {
            scope = BotCommandScope.Default();
        }

        var item = cmds.FirstOrDefault(a => a.Key.Type == scope.Type);

        if (item.Key != null)
        {
            cmds[item.Key] = null;
        }
        else
        {
            cmds[scope] = null;
        }
    }

    /// <summary>
    ///     Adding the default /start command with a description.
    /// </summary>
    /// <param name="cmds"></param>
    /// <param name="description"></param>
    public static void Start(this Dictionary<BotCommandScope, List<BotCommand>> cmds, string description)
    {
        Add(cmds, "start", description);
    }

    /// <summary>
    ///     Adding the default /help command with a description.
    /// </summary>
    /// <param name="cmds"></param>
    /// <param name="description"></param>
    public static void Help(this Dictionary<BotCommandScope, List<BotCommand>> cmds, string description)
    {
        Add(cmds, "help", description);
    }

    /// <summary>
    ///     Adding the default /settings command with a description.
    /// </summary>
    /// <param name="cmds"></param>
    /// <param name="description"></param>
    public static void Settings(this Dictionary<BotCommandScope, List<BotCommand>> cmds, string description)
    {
        Add(cmds, "settings", description);
    }

    /// <summary>
    ///     Clears all default commands.
    /// </summary>
    /// <param name="cmds"></param>
    public static void ClearDefaultCommands(this Dictionary<BotCommandScope, List<BotCommand>> cmds)
    {
        Clear(cmds);
    }

    /// <summary>
    ///     Clears all commands of a specific device.
    /// </summary>
    /// <param name="cmds"></param>
    public static void ClearChatCommands(this Dictionary<BotCommandScope, List<BotCommand>> cmds, long deviceId)
    {
        Clear(cmds, new BotCommandScopeChat { ChatId = deviceId });
    }

    /// <summary>
    ///     Adding a chat command with a description.
    /// </summary>
    /// <param name="cmds"></param>
    /// <param name="command"></param>
    /// <param name="description"></param>
    public static void AddChatCommand(this Dictionary<BotCommandScope, List<BotCommand>> cmds, long deviceId,
                                      string command, string description)
    {
        Add(cmds, command, description, new BotCommandScopeChat { ChatId = deviceId });
    }

    /// <summary>
    ///     Adding a group command with a description.
    /// </summary>
    /// <param name="cmds"></param>
    /// <param name="command"></param>
    /// <param name="description"></param>
    public static void AddGroupCommand(this Dictionary<BotCommandScope, List<BotCommand>> cmds, string command,
                                       string description)
    {
        Add(cmds, command, description, new BotCommandScopeAllGroupChats());
    }

    /// <summary>
    ///     Clears all group commands.
    /// </summary>
    /// <param name="cmds"></param>
    public static void ClearGroupCommands(this Dictionary<BotCommandScope, List<BotCommand>> cmds)
    {
        Clear(cmds, new BotCommandScopeAllGroupChats());
    }

    /// <summary>
    ///     Adding group admin command with a description.
    /// </summary>
    /// <param name="cmds"></param>
    /// <param name="command"></param>
    /// <param name="description"></param>
    public static void AddGroupAdminCommand(this Dictionary<BotCommandScope, List<BotCommand>> cmds, string command,
                                            string description)
    {
        Add(cmds, command, description, new BotCommandScopeAllChatAdministrators());
    }

    /// <summary>
    ///     Clears all group admin commands.
    /// </summary>
    /// <param name="cmds"></param>
    public static void ClearGroupAdminCommand(this Dictionary<BotCommandScope, List<BotCommand>> cmds)
    {
        Clear(cmds, new BotCommandScopeAllChatAdministrators());
    }

    /// <summary>
    ///     Adding a privat command with a description.
    /// </summary>
    /// <param name="cmds"></param>
    /// <param name="command"></param>
    /// <param name="description"></param>
    public static void AddPrivateChatCommand(this Dictionary<BotCommandScope, List<BotCommand>> cmds,
                                             string command, string description)
    {
        Add(cmds, command, description, new BotCommandScopeAllPrivateChats());
    }

    /// <summary>
    ///     Clears all private commands.
    /// </summary>
    /// <param name="cmds"></param>
    public static void ClearPrivateChatCommand(this Dictionary<BotCommandScope, List<BotCommand>> cmds)
    {
        Clear(cmds, new BotCommandScopeAllPrivateChats());
    }
}