#  BSD 3-Clause License
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#  Copyright (c) 2019, Elasticsearch BV
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from __future__ import absolute_import

from elasticapm.contrib.asyncio.traces import async_capture_span
from elasticapm.instrumentation.packages.asyncio.base import AsyncAbstractInstrumentedModule


class RedisAsyncioInstrumentation(AsyncAbstractInstrumentedModule):
    name = "redis"

    instrument_list = [
        ("redis.asyncio.client", "Redis.execute_command"),
        ("redis.asyncio.client", "PubSub.execute_command"),
    ]

    async def call(self, module, method, wrapped, instance, args, kwargs):
        if len(args) > 0:
            wrapped_name = args[0]
            if isinstance(wrapped_name, bytes):
                wrapped_name = wrapped_name.decode()
        else:
            wrapped_name = self.get_wrapped_name(wrapped, instance, method)

        async with async_capture_span(
            wrapped_name, span_type="db", span_subtype="redis", span_action="query", leaf=True
        ) as span:
            if span.context is not None:
                span.context["destination"] = _get_destination_info(instance)

            return await wrapped(*args, **kwargs)


class RedisPipelineInstrumentation(AsyncAbstractInstrumentedModule):
    name = "redis"

    instrument_list = [("redis.asyncio.client", "Pipeline.execute")]

    async def call(self, module, method, wrapped, instance, args, kwargs):
        wrapped_name = self.get_wrapped_name(wrapped, instance, method)

        async with async_capture_span(
            wrapped_name, span_type="db", span_subtype="redis", span_action="query", leaf=True
        ) as span:
            if span.context is not None:
                span.context["destination"] = _get_destination_info(instance)

            return await wrapped(*args, **kwargs)


def _get_destination_info(connection):
    destination_info = {"service": {"name": "", "resource": "redis", "type": ""}}
    if connection.connection_pool:
        destination_info["port"] = connection.connection_pool.connection_kwargs.get("port")
        destination_info["address"] = connection.connection_pool.connection_kwargs.get("host")

    return destination_info