using System;
using System.Runtime.InteropServices;
using Dalamud.Game.ClientState.GamePad;
using Dalamud.Plugin.Services;
using FFXIVClientStructs.FFXIV.Client.System.Framework;
using FFXIVClientStructs.FFXIV.Client.UI.Misc;
using HSUI.Interface.GeneralElements;

namespace HSUI.Helpers
{
    /// <summary>Provides current cross hotbar trigger state (L2/R2) and game controller-mode detection for sync with game client.</summary>
    public static class ControllerHotbarHelper
    {
        private static IGamepadState? _gamepadState;

        public static void SetGamepadState(IGamepadState? gamepadState)
        {
            _gamepadState = gamepadState;
        }

        /// <summary>True when the game's Character Configuration has controller (gamepad) mode enabled. Reads the PadMode config option so bar mode follows the toggle and does not switch on input.</summary>
        public static unsafe bool IsGameInControllerMode()
        {
            try
            {
                Framework* framework = Framework.Instance();
                if (framework == null) return false;
                int option = (int)ConfigOption.PadMode;
                if (framework->SystemConfig.SystemConfigBase.UiConfig.ConfigCount <= option)
                    return false;
                uint value = framework->SystemConfig.SystemConfigBase.UiConfig.ConfigEntry[option].Value.UInt;
                // PadMode: 0 = keyboard/mouse, 1 = gamepad
                return value != 0;
            }
            catch
            {
                return false;
            }
        }

        /// <summary>Returns the current trigger combo for which cross bar should be visible. Uses L2/R2 from gamepad.</summary>
        public static CrossBarTrigger GetCurrentTrigger()
        {
            if (_gamepadState == null)
                return CrossBarTrigger.None;

            try
            {
                // Raw returns float (analog); treat as pressed when > 0.5
                bool l2 = _gamepadState.Raw(GamepadButtons.L2) > 0.5f;
                bool r2 = _gamepadState.Raw(GamepadButtons.R2) > 0.5f;

                if (l2 && r2)
                {
                    // Both held - could distinguish L2 then R2 vs R2 then L2 by order; for now use L2R2
                    return CrossBarTrigger.L2R2;
                }
                if (l2) return CrossBarTrigger.L2;
                if (r2) return CrossBarTrigger.R2;
                return CrossBarTrigger.None;
            }
            catch
            {
                return CrossBarTrigger.None;
            }
        }
    }
}