using XSDVisualiser.Core;
using XSDVisualiser.Utils;

/*
if (args.Length == 0 || args[0] is "-h" or "--help")
{
    PrintHelp();
    return;
}
var inputPath = args[0];
*/

const string inputPath = "/home/frederik/Work/XSDVisualiser/XSDVisualiser/Rescources/SF2900/SF2900_EP_MS1-2/DistributionServiceMsgV2.xsd"; 

if (!File.Exists(inputPath))
{
    Console.Error.WriteLine($"Input XSD file not found: {inputPath}");
    Environment.Exit(1);
}

var format = "json";
string? outPath = null;
for (int i = 1; i < args.Length; i++)
{
    switch (args[i])
    {
        case "--format":
            if (i + 1 < args.Length)
            {
                format = args[++i].ToLowerInvariant();
            }
            else
            {
                Console.Error.WriteLine("--format requires a value: xml or json");
                Environment.Exit(2);
            }
            break;
        case "--out":
            if (i + 1 < args.Length)
            {
                outPath = args[++i];
            }
            else
            {
                Console.Error.WriteLine("--out requires a file path");
                Environment.Exit(2);
            }
            break;
    }
}

try
{
    var parser = new XsdSchemaParser();
    var model = parser.Parse(inputPath);

    string output = format switch
    {
        "json" => Serialization.ToJson(model),
        _ => Serialization.ToXml(model)
    };

    if (!string.IsNullOrWhiteSpace(outPath))
    {
        File.WriteAllText(outPath!, output);
        Console.WriteLine($"Wrote {format.ToUpperInvariant()} to {Path.GetFullPath(outPath!)}");
    }
    else
    {
        Console.WriteLine(output);
    }
}
catch (Exception ex)
{
    Console.Error.WriteLine("Error: " + ex.ToString());
    if (ex.InnerException != null)
    {
        Console.Error.WriteLine("Inner: " + ex.InnerException.ToString());
    }
    Environment.Exit(3);
}

return;

static void PrintHelp()
{
    Console.WriteLine("XSDVisualiser - Parse an XSD and emit a structural model with types, constraints, and cardinality");
    Console.WriteLine("Usage: XSDVisualiser <schema.xsd> [--format xml|json] [--out outputFile]");
    Console.WriteLine("Default format is xml; if --out is omitted the output is printed to stdout.");
}