using Google.Protobuf;
using RPG.Network.Proto;
using RPG.Services.Core.Network;
using RPG.Services.Core.Network.Command;

namespace RPG.Services.MUIP.Handlers;

internal static class ApiHandler
{
    private const string LogCategoryName = "MuipHttpApi";
    private const string GmTalkSessionIdQueryKey = "s_id";
    private const string GmTalkCommandQueryKey = "cmd";

    private static ILogger? _logger;

    public static IResult OnGmTalk(HttpContext ctx, ServiceBox services, ILoggerFactory loggerFactory)
    {
        _logger ??= loggerFactory.CreateLogger(LogCategoryName);

        IQueryCollection query = ctx.Request.Query;
        if (!query.ContainsKey(GmTalkSessionIdQueryKey) || !query.ContainsKey(GmTalkCommandQueryKey))
            return Results.BadRequest();

        string? sessionIdTxt = query[GmTalkSessionIdQueryKey];
        string? cmd = query[GmTalkCommandQueryKey];

        if (cmd == null || sessionIdTxt == null)
            return Results.BadRequest();

        if (!ulong.TryParse(sessionIdTxt, out ulong sessionId))
            return Results.BadRequest();

        _logger.LogInformation("Received GM Talk request via HTTP, session id: {id}, cmd: {cmd}", sessionId, cmd);

        SendServiceCommand(services, ServiceCommandType.GmtalkByMuip, new CmdGmtalkByMuip
        {
            SessionId = sessionId,
            Msg = cmd
        }, RPGServiceType.Gameserver);

        return Results.Ok("Request forwarded to Gameserver");
    }

    private static void SendServiceCommand<TBody>(ServiceBox services, ServiceCommandType commandType, TBody body, RPGServiceType target) where TBody : IMessage<TBody>
    {
        ServiceCommand command = new(services.CurrentType, commandType, body.ToByteArray());

        byte[] buffer = GC.AllocateUninitializedArray<byte>(command.Body.Length + 7);
        ServiceCommandEncoder.EncodeCommand(command, buffer);

        services.SendToService(target, buffer);
    }
}