import gzip
import json
import re
from itertools import starmap, repeat, chain
from operator import itemgetter

import pytest
from funcy import compose, lpluck, first, second

from pyinfra.default_objects import (
    get_callback,
    get_response_strategy,
    get_consumer,
    get_queue_manager,
    get_storage,
)
from pyinfra.queue.consumer import Consumer
from pyinfra.server.packing import unpack, pack
from pyinfra.visitor import QueueVisitor, get_download_strategy
from test.utils.input import pair_data_with_queue_message


@pytest.mark.parametrize(
    "batched",
    [
        False,
        True,
    ],
)
@pytest.mark.parametrize(
    "one_to_many",
    [
        False,
        True,
    ],
)
@pytest.mark.parametrize(
    "analysis_task",
    [
        # False,
        True,
    ],
)
@pytest.mark.parametrize(
    "n_items",
    [
        1,
        3,
    ],
)
@pytest.mark.parametrize("n_pages", [2])
@pytest.mark.parametrize("buffer_size", [1, 2])
@pytest.mark.parametrize(
    "item_type",
    [
        "string",
        "image",
        "pdf",
    ],
)
@pytest.mark.parametrize(
    "queue_manager_name",
    [
        # "mock",
        "pika",
    ],
    scope="session",
)
@pytest.mark.parametrize(
    "client_name",
    [
        "mock",
        # "s3",
        # "azure",
    ],
    scope="session",
)
@pytest.mark.parametrize(
    "components_type",
    [
        # "test",
        "real",
    ],
)
@pytest.mark.parametrize(
    "many_to_n",
    [
        False,
        True,
    ],
)
def test_serving(
    server_process, bucket_name, components, targets, data_message_pairs, n_items, many_to_n, download_strategy
):

    storage, queue_manager, consumer = components

    assert queue_manager.input_queue.to_list() == []
    assert queue_manager.output_queue.to_list() == []
    assert [*storage.get_all_object_names(bucket_name)] == []

    if n_items:
        assert data_message_pairs

    if many_to_n:
        upload_data_to_folder_in_storage_and_publish_single_request_to_queue(
            storage, queue_manager, data_message_pairs, download_strategy
        )
    else:
        upload_data_to_storage_and_publish_requests_to_queue(
            storage, queue_manager, data_message_pairs, download_strategy
        )

    consumer.consume_and_publish(n=int(many_to_n) or n_items)

    outputs = get_data_uploaded_by_consumer(queue_manager, storage, bucket_name)

    # TODO: correctness of target should be validated as well, since production was become non-trivial
    assert sorted(outputs) == sorted(targets)


@pytest.fixture
def data_metadata_packs(input_data_items, metadata):
    return list(starmap(compose(lambda s: s.encode(), json.dumps, pack), zip(input_data_items, metadata)))


@pytest.fixture
def data_message_pairs(data_metadata_packs):
    data_message_pairs = pair_data_with_queue_message(data_metadata_packs)
    return data_message_pairs


# TODO: refactor; too many params
def upload_data_to_storage_and_publish_requests_to_queue(storage, queue_manager, data_message_pairs, download_strategy):
    for data, message in data_message_pairs:
        upload_data_to_storage_and_publish_request_to_queue(storage, queue_manager, data, message, download_strategy)


# TODO: refactor; too many params
def upload_data_to_storage_and_publish_request_to_queue(storage, queue_manager, data, message, download_strategy):
    storage.put_object(**download_strategy.get_object_descriptor(message), data=gzip.compress(data))
    queue_manager.publish_request(message)


# TODO: refactor body; too long and scripty
def upload_data_to_folder_in_storage_and_publish_single_request_to_queue(
    storage, queue_manager, data_message_pairs, download_strategy
):
    assert data_message_pairs

    ref_message = second(first(data_message_pairs))
    pages = ref_message["pages"]

    for data, page in zip(map(first, data_message_pairs), pages):
        object_descriptor = download_strategy.get_object_descriptor(ref_message)
        object_descriptor["object_name"] = build_filepath(object_descriptor, page)

        storage.put_object(**object_descriptor, data=gzip.compress(data))

    queue_manager.publish_request(ref_message)


def build_filepath(object_descriptor, page):
    object_name = object_descriptor["object_name"]
    parts = object_name.split("/")
    parts.insert(-1, "pages")
    path = "/".join(parts)
    path = re.sub("id:\d", f"id:{page}", path)

    return path


def get_data_uploaded_by_consumer(queue_manager, storage, bucket_name):
    names_of_uploaded_files = lpluck("responseFile", queue_manager.output_queue.to_list())
    uploaded_files = starmap(storage.get_object, zip(repeat(bucket_name), names_of_uploaded_files))
    outputs = sorted(chain(*map(decode, uploaded_files)), key=itemgetter(0))
    return outputs


@pytest.fixture
def components(components_type, real_components, test_components, bucket_name):
    if components_type == "real":
        components = real_components
    elif components_type == "test":
        components = test_components
    else:
        raise ValueError(f"Unknown component type '{components_type}'.")

    storage, queue_manager, consumer = components

    queue_manager.clear()
    storage.make_bucket(bucket_name)
    storage.clear_bucket(bucket_name)

    yield storage, queue_manager, consumer

    queue_manager.clear()
    storage.clear_bucket(bucket_name)


def decode(storage_item):
    storage_item = json.loads(gzip.decompress(storage_item).decode())
    if not isinstance(storage_item, list):
        storage_item = [storage_item]

    yield from map(unpack, storage_item)


@pytest.fixture(params=["real", "mixed"])
def components_type(request):
    return request.param


@pytest.fixture
def real_components(url, download_strategy):
    callback = get_callback(url)
    consumer = get_consumer(callback)
    queue_manager = get_queue_manager()
    storage = get_storage()

    consumer.visitor.download_strategy = download_strategy
    return storage, queue_manager, consumer


@pytest.fixture
def download_strategy(many_to_n):
    return get_download_strategy("multi" if many_to_n else "single")


@pytest.fixture
def test_components(url, queue_manager, storage):

    callback = get_callback(url)
    visitor = QueueVisitor(storage, callback, get_response_strategy(storage))
    consumer = Consumer(visitor, queue_manager)

    return storage, queue_manager, consumer