using System.Diagnostics.CodeAnalysis;
using ADOFAIRenderer.Core;
using HarmonyLib;
using UnityEngine;
using UnityEngine.UI;

namespace ADOFAIRenderer.Patch.Game;

/// <summary>
/// Replaces the game's status text (normally "Autoplay", "Auto tile" or "Debug Mode") with the render status.
/// <para>
/// Patched member: <c>scrShowIfDebug.Update()</c>, which each frame sets its UI <c>Text</c> (<c>txt</c>) to the autoplay /
/// auto-tile / debug label or hides it (no-HUD modes, recording mode), in <c>defaultColor</c> (green) or orange for auto tiles.
/// </para>
/// <para>
/// Active while <see cref="RenderManager.IsActive"/> (stage &gt;= OnScene). The postfix overwrites whatever the original set,
/// every frame, so the text is shown even in the game's no-HUD modes.
/// </para>
/// </summary>
[HarmonyPatch(typeof(scrShowIfDebug))]
// ReSharper disable once InconsistentNaming
public static class scrShowIfDebugPatch
{
    /// <summary>
    /// Postfix of <c>scrShowIfDebug.Update</c>. Shows, in the default (green) color:
    /// <list type="bullet">
    /// <item>"Render in Ns.." during the countdown (N = <c>RenderManager.countdown</c>, seconds), otherwise "Render";</item>
    /// <item>after the end condition is met (<c>endFrame</c> != -1), a second line "Waiting for X.Xs.." with the remaining
    /// part of <c>DelayAfterEnd</c> in render seconds ((frameCount - endFrame) / RenderFPS elapsed), clamped at 0.</item>
    /// </list>
    /// </summary>
    /// <param name="___txt">Private field <c>txt</c>: the status Text component.</param>
    /// <param name="___defaultColor">Private field <c>defaultColor</c>: the game's status text color.</param>
    [HarmonyPostfix]
    [HarmonyPatch("Update")]
    [SuppressMessage("ReSharper", "InconsistentNaming")]
    private static void IgnoreInput(Text ___txt, Color ___defaultColor)
    {
        if (!RenderManager.IsActive) return;

        ___txt.enabled = true;
        ___txt.text = "Render";
        if (RenderManager.Instance)
        {
            if (RenderManager.Instance.countdown > 0) ___txt.text = $"Render in {RenderManager.Instance.countdown}s..";

            if (RenderManager.Instance.endFrame != -1)
            {
                var elapsedFrames = RenderManager.Instance.frameCount - RenderManager.Instance.endFrame;
                var remainingTime = RenderManager.Instance.Configuration.DelayAfterEnd - elapsedFrames / RenderManager.Instance.Configuration.RenderFPS;
                if (remainingTime < 0) remainingTime = 0;
                ___txt.text += $"\nWaiting for {remainingTime:F1}s..";
            }
        }
            
        ___txt.color = ___defaultColor;
    }
}