using System;
using System.IO;
using System.Linq;

class Program {
    static void Main(string[] args) {
        // Resolve vk.xml path
        string vkXml =
            args.FirstOrDefault(a => a.EndsWith("vk.xml", StringComparison.OrdinalIgnoreCase))
            ?? GuessVkXmlFromEnv()
            ?? @"C:\VulkanSDK\1.4.313.0\share\vulkan\registry\vk.xml";

        if (!File.Exists(vkXml)) {
            Console.Error.WriteLine($"vk.xml not found: {vkXml}");
            Environment.Exit(1);
        }

        // Output dir (.../out/VulkanPP)
        string outRoot = args.FirstOrDefault(a => a.StartsWith("--out="))?.Substring("--out=".Length)
                         ?? Path.Combine(Environment.CurrentDirectory, "out");
        string outDir = Path.Combine(outRoot, "VulkanPP");
        Directory.CreateDirectory(outDir);

        Console.WriteLine($"Parsing: {vkXml}");
        var spec = VkSpec.Load(vkXml);

        // Optional sugar methods (empty by default)
        var sugar = Array.Empty<SugarClassSpec>();

        Console.WriteLine($"Generating to: {outDir}");
        var gen = new Generator(spec, outDir, sugar);
        gen.GenerateAll();

        Console.WriteLine("Done.");
    }

    static string? GuessVkXmlFromEnv() {
        var sdk = Environment.GetEnvironmentVariable("VULKAN_SDK");
        if (string.IsNullOrWhiteSpace(sdk)) return null;
        string candidate = Path.Combine(sdk, "share", "vulkan", "registry", "vk.xml");
        return File.Exists(candidate) ? candidate : null;
    }
}