using System.Diagnostics;
using Nexus.Game;
using Nexus.Screen;
using Serilog;

namespace Nexus.Bot;

/// <summary>
/// Monitors life/mana and presses flask keys when they drop below thresholds.
/// Call <see cref="Tick"/> from any combat loop iteration.
/// </summary>
public class FlaskManager
{
    private const float LifeThreshold = 0.50f;
    private const float ManaThreshold = 0.50f;
    private const long CooldownMs = 4000;

    // VK codes for number keys 1 and 2
    private const int VK_1 = 0x31;
    private const int VK_2 = 0x32;

    private readonly IGameController _game;
    private readonly HudReader _hudReader;
    private readonly Stopwatch _sw = Stopwatch.StartNew();
    private long _lastLifeFlaskMs = -CooldownMs;
    private long _lastManaFlaskMs = -CooldownMs;

    public FlaskManager(IGameController game, HudReader hudReader)
    {
        _game = game;
        _hudReader = hudReader;
    }

    /// <summary>
    /// Check life/mana and press flask keys if needed. Call every loop iteration.
    /// </summary>
    public async Task Tick()
    {
        var hud = _hudReader.Current;
        var now = _sw.ElapsedMilliseconds;

        if (hud.LifePct < LifeThreshold && now - _lastLifeFlaskMs >= CooldownMs)
        {
            Log.Debug("Life flask: {Life:P0} < {Threshold:P0}", hud.LifePct, LifeThreshold);
            await _game.PressKey(VK_1);
            _lastLifeFlaskMs = now;
        }

        if (hud.ManaPct < ManaThreshold && now - _lastManaFlaskMs >= CooldownMs)
        {
            Log.Debug("Mana flask: {Mana:P0} < {Threshold:P0}", hud.ManaPct, ManaThreshold);
            await _game.PressKey(VK_2);
            _lastManaFlaskMs = now;
        }
    }
}