using Godot;
using IslaApocalypse.Core;

namespace IslaApocalypse.Tools
{
	/// <summary>
	/// A print-and-quit diagnostic: resolves and reports this project's user:// directory, then
	/// exits. It generates nothing and writes nothing.
	///
	/// ═══ WHY IT EXISTS ═══
	///
	/// The old prototype is named "islaApocalypse" and owns
	/// ~/.local/share/godot/app_userdata/islaApocalypse/, which holds the PRESERVED reference
	/// seeds, blueprints and batches. A v2 project sharing that name would read and clobber them
	/// at runtime. project.godot pins the isolation two ways (distinct name + custom user dir);
	/// this probe CONFIRMS the pin actually resolves, rather than trusting that it does.
	///
	/// Run it after any change to project.godot's [application] block:
	///
	///   Godot_v4.7.2-stable_mono_linux.x86_64 --headless \
	///     --path ~/celerNexus/islaApocalypse-v2 res://Tools/Scenes/UserDirProbe.tscn
	///
	/// --headless is fine HERE — it hangs only on the snapshot capture's render-frame awaits, and
	/// this awaits nothing. → Tools/README.md, `Design - Tooling - Iteration and Batching.md`.
	/// </summary>
	public partial class UserDirProbe : Node
	{
		public override void _Ready()
		{
			string userDir = OS.GetUserDataDir();

			// Hand Core the engine-resolved directory — Core is engine-free and never asks Godot itself.
			ToolingPaths.Configure(userDir);

			GD.Print("==================================================================");
			GD.Print("  user:// PROBE — islaApocalypse-v2");
			GD.Print("==================================================================");
			GD.Print($"project name     : {ProjectSettings.GetSetting("application/config/name")}");
			GD.Print($"custom user dir  : {ProjectSettings.GetSetting("application/config/use_custom_user_dir")} " +
					 $"(\"{ProjectSettings.GetSetting("application/config/custom_user_dir_name")}\")");
			GD.Print($"user:// resolves : {userDir}");
			GD.Print($"globalized       : {ProjectSettings.GlobalizePath("user://")}");
			GD.Print("------------------------------------------------------------------");
			GD.Print("  ISOLATION CHECK");
			GD.Print("------------------------------------------------------------------");

			// The one path this project must never resolve to.
			const string forbidden = "app_userdata/islaApocalypse";
			bool clash = userDir.Replace('\\', '/').TrimEnd('/').EndsWith(forbidden, System.StringComparison.Ordinal);
			GD.Print(clash
				? "  ✗ FAIL — resolves to the OLD prototype's dir. Do not run anything else."
				: "  ✓ PASS — not the old prototype's app_userdata/islaApocalypse/.");

			GD.Print("------------------------------------------------------------------");
			GD.Print("  RESOLVED TOOLING PATHS (env-overridable)");
			GD.Print("------------------------------------------------------------------");
			GD.Print(ToolingPaths.Describe());
			GD.Print("------------------------------------------------------------------");
			GD.Print($"  Core self-check: {MaterialRegistry.TerrainCount} terrain materials, " +
					 $"{MaterialRegistry.BuildingCount} building materials, " +
					 $"{RecipeRegistry.Count} recipes (0 is correct — the seam is deliberately empty).");
			GD.Print($"  Scale self-check: {new GenerationScale(10240)}");
			GD.Print("==================================================================");

			GetTree().Quit(clash ? 1 : 0);
		}
	}
}