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from elasticapm.instrumentation.packages.asyncio.base import AbstractInstrumentedModule
from elasticapm.utils.logging import get_logger

logger = get_logger("elasticapm.instrument")


class GRPCClientInstrumentation(AbstractInstrumentedModule):
    name = "grpc_client_instrumentation"
    creates_transactions = True
    instrument_list = [("grpc", "insecure_channel"), ("grpc", "secure_channel")]

    def call(self, module, method, wrapped, instance, args, kwargs):
        import grpc

        from elasticapm.contrib.grpc.client_interceptor import _ClientInterceptor

        result = wrapped(*args, **kwargs)
        target = kwargs.get("target") or args[0]
        if ":" in target:
            host, port = target.split(":")
            try:
                port = int(port)
            except ValueError:
                port = None
        else:
            host, port = None, None
        return grpc.intercept_channel(result, _ClientInterceptor(host, port, secure=method == "secure_channel"))


class GRPCServerInstrumentation(AbstractInstrumentedModule):
    name = "grpc_server_instrumentation"
    creates_transactions = True
    instrument_list = [("grpc", "server")]

    def call(self, module, method, wrapped, instance, args, kwargs):
        from elasticapm.contrib.grpc.server_interceptor import _ServerInterceptor

        interceptors = kwargs.get("interceptors") or (args[2] if len(args) > 2 else [])
        interceptors.insert(0, _ServerInterceptor())
        if len(args) > 2:
            args = list(args)
            args[2] = interceptors
        else:
            kwargs["interceptors"] = interceptors
        return wrapped(*args, **kwargs)


class GRPCAsyncServerInstrumentation(AbstractInstrumentedModule):
    name = "grpc_async_server_instrumentation"
    creates_transactions = True
    instrument_list = [("grpc.aio", "server")]

    def call(self, module, method, wrapped, instance, args, kwargs):
        from elasticapm.contrib.grpc.async_server_interceptor import _AsyncServerInterceptor

        interceptors = kwargs.get("interceptors") or (args[2] if len(args) > 2 else [])
        interceptors.insert(0, _AsyncServerInterceptor())
        if len(args) > 2:
            args = list(args)
            args[2] = interceptors
        else:
            kwargs["interceptors"] = interceptors
        return wrapped(*args, **kwargs)