using ADOFAIRenderer.Core;
using HarmonyLib;

namespace ADOFAIRenderer.Patch.Game;

/// <summary>
/// Applies the configured color of the third (green, "wind") planet used by multi-planet levels.
/// <para>
/// Patched members: <c>PlanetarySystem.Init()</c>, which creates the planets including <c>planetGreen</c> (default color
/// RGB 0.3, 0.7, 0.0); and <c>PlanetarySystem.ApplyMultiplanetColors()</c>, which recolors the extra planets
/// (green, yellow, purple, ...) from the red/blue planet colors (skipped by the game when <c>GCS.staticPlanetColors</c> is set).
/// Both postfixes reapply the override after the game has set its color.
/// </para>
/// <para>Active from stage Load until the stage returns to None. The fire/ice colors are handled by <see cref="PersistencePatch"/>.</para>
/// </summary>
[HarmonyPatch(typeof(PlanetarySystem))]
public static class PlanetarySystemPatch
{
    /// <summary>Postfix of <c>PlanetarySystem.Init</c>: applies the wind planet color override to the new planets.</summary>
    /// <param name="__instance">The planetary system that was initialized.</param>
    [HarmonyPostfix]
    [HarmonyPatch("Init")]
    // ReSharper disable once InconsistentNaming
    public static void OnInit(PlanetarySystem __instance)
    {
        ApplyWindPlanetColor(__instance);
    }

    /// <summary>Postfix of <c>PlanetarySystem.ApplyMultiplanetColors</c>: reapplies the wind planet color override.</summary>
    /// <param name="__instance">The planetary system whose extra planet colors were updated.</param>
    [HarmonyPostfix]
    [HarmonyPatch("ApplyMultiplanetColors")]
    // ReSharper disable once InconsistentNaming
    public static void OnApplyMultiplanetColors(PlanetarySystem __instance)
    {
        ApplyWindPlanetColor(__instance);
    }

    /// <summary>
    /// Sets <c>planetGreen</c>'s renderer color to <c>AdvancedConfig.windPlanetColor</c> when a render is in progress
    /// (stage != None) and the override is set. Does nothing when the override is null or the planet does not exist.
    /// </summary>
    /// <param name="planetarySystem">The planetary system to update.</param>
    private static void ApplyWindPlanetColor(PlanetarySystem planetarySystem)
    {
        if (RenderManager.Instance == null || RenderManager.Instance.stage == RenderStage.None) return;

        var advConf = RenderManager.Instance.Configuration.AdvancedConfig;
        if (advConf.windPlanetColor.HasValue && planetarySystem.planetGreen)
        {
            planetarySystem.planetGreen.planetRenderer.SetColor(new PlanetColor(advConf.windPlanetColor.Value));
        }
    }
}