using ADOFAIRenderer.Core;
using HarmonyLib;

namespace ADOFAIRenderer.Patch.Game;

/// <summary>
/// Prevents the end portal from being spawned on level tiles for the "non-tile" render option.
/// <para>
/// Patched member: <c>scrFloor.SpawnPortalParticles()</c>, which instantiates the animated portal prefab
/// (<c>scrPortalParticles</c>: glow, particles, cap and icon) as a child of the floor. The game calls it from
/// <c>scrLevelMaker</c>, <c>scrController</c> and <c>scrFloor</c> for the portal floor.
/// </para>
/// <para>
/// Active from stage Load when <c>AdvancedConfig.NonTile</c> is enabled, and only for floors that belong to
/// <c>scrLevelMaker.listFloors</c> (the level's tiles). See <see cref="scnGamePatch.ProcessFloors"/> for the other tile renderers.
/// </para>
/// </summary>
[HarmonyPatch(typeof(scrFloor))]
// ReSharper disable once InconsistentNaming
public class scrFloorPatch
{
    /// <summary>Prefix of <c>scrFloor.SpawnPortalParticles</c>.</summary>
    /// <param name="__instance">The floor that would receive the portal.</param>
    /// <returns>True to run the original method (spawn the portal); false to skip it (non-tile render, level floor).</returns>
    [HarmonyPrefix]
    [HarmonyPatch("SpawnPortalParticles")]
    // ReSharper disable once InconsistentNaming
    public static bool SkipPortalSpawn(scrFloor __instance)
    {
        if (!scrLevelMaker.instance.listFloors.Contains(__instance)) return true;
            
        var nonTile = RenderManager.Instance.stage >= RenderStage.Load &&
                      RenderManager.Instance.Configuration.AdvancedConfig.NonTile;
        return !nonTile;
    }

    /// <summary>
    /// Postfix of <c>scrFloor.Start</c>.
    /// The game sets <c>enabled = isVisible</c> in Start(), which disables all off-screen tiles right at spawn.
    /// When <c>DisableTileCulling</c> is enabled, force every floor to remain enabled.
    /// </summary>
    [HarmonyPostfix]
    [HarmonyPatch("Start")]
    public static void ForceEnableOnStart(scrFloor __instance)
    {
        if (RenderManager.Instance &&
            RenderManager.Instance.stage >= RenderStage.Load &&
            RenderManager.Instance.Configuration.AdvancedConfig.DisableTileCulling)
        {
            __instance.enabled = true;
        }
    }

    /// <summary>
    /// Prefix of <c>scrFloor.OnBecameInvisible</c>.
    /// Skips disabling the floor component (<c>enabled = false</c>) while rendering with
    /// <c>AdvancedConfig.DisableTileCulling</c> enabled, preventing the 1-frame update lag/glitch
    /// when tiles enter the camera view.
    /// </summary>
    [HarmonyPrefix]
    [HarmonyPatch("OnBecameInvisible")]
    // ReSharper disable once InconsistentNaming
    public static bool PreventTileCulling(scrFloor __instance)
    {
        if (RenderManager.Instance &&
            RenderManager.Instance.stage >= RenderStage.Load &&
            RenderManager.Instance.Configuration.AdvancedConfig.DisableTileCulling)
        {
            return false;
        }
        return true;
    }
}