using Godot;
using Theriapolis.GodotHost.Platform;
using Theriapolis.GodotHost.Rendering;

namespace Theriapolis.GodotHost;

public partial class Main : Node
{
    public override void _Ready()
    {
        // GetCmdlineArgs returns every arg (Godot's own flags + ours);
        // GetCmdlineUserArgs only returns args after a "--" separator.
        // Use the union so users don't have to remember the separator.
        var userArgs = OS.GetCmdlineUserArgs();
        var allArgs = OS.GetCmdlineArgs();
        var args = new string[userArgs.Length + allArgs.Length];
        userArgs.CopyTo(args, 0);
        allArgs.CopyTo(args, userArgs.Length);

        ulong? smokeTestSeed = null;
        ulong? worldMapSeed = null;
        bool runAssetTest = false;
        for (int i = 0; i < args.Length; i++)
        {
            if (args[i] == "--smoke-test")
            {
                ulong seed = 12345UL;
                if (i + 1 < args.Length && ulong.TryParse(args[i + 1], out var parsed))
                    seed = parsed;
                smokeTestSeed = seed;
                break;
            }
            if (args[i] == "--asset-test")
            {
                runAssetTest = true;
                break;
            }
            if (args[i] == "--world-map")
            {
                ulong seed = 12345UL;
                if (i + 1 < args.Length && ulong.TryParse(args[i + 1], out var parsed))
                    seed = parsed;
                worldMapSeed = seed;
                break;
            }
        }

        if (smokeTestSeed.HasValue)
        {
            int code = SmokeTest.Run(smokeTestSeed.Value);
            GetTree().Quit(code);
            return;
        }

        if (runAssetTest)
        {
            int code = AssetTest.Run();
            GetTree().Quit(code);
            return;
        }

        if (worldMapSeed.HasValue)
        {
            // Replace the M0 hello-world children with the M2 world-map view.
            foreach (Node child in GetChildren())
                child.QueueFree();
            AddChild(new WorldMapView(worldMapSeed.Value));
            return;
        }

        GD.Print("Theriapolis.Godot host ready (M0 hello-world).");
    }

    public override void _UnhandledInput(InputEvent @event)
    {
        if (@event.IsActionPressed("ui_toggle_fullscreen"))
        {
            var mode = DisplayServer.WindowGetMode();
            DisplayServer.WindowSetMode(
                mode == DisplayServer.WindowMode.Fullscreen
                    ? DisplayServer.WindowMode.Windowed
                    : DisplayServer.WindowMode.Fullscreen);
        }
    }
}