import asyncio

import pytest

from tests.configs import LISTEN_MADDR
from tests.factories import PubsubFactory
from tests.utils import cleanup, connect

from .configs import FLOODSUB_PROTOCOL_ID

SUPPORTED_PROTOCOLS = [FLOODSUB_PROTOCOL_ID]

FLOODSUB_PROTOCOL_TEST_CASES = [
    {
        "name": "simple_two_nodes",
        "supported_protocols": SUPPORTED_PROTOCOLS,
        "adj_list": {"A": ["B"]},
        "topic_map": {"topic1": ["B"]},
        "messages": [{"topics": ["topic1"], "data": b"foo", "node_id": "A"}],
    },
    {
        "name": "three_nodes_two_topics",
        "supported_protocols": SUPPORTED_PROTOCOLS,
        "adj_list": {"A": ["B"], "B": ["C"]},
        "topic_map": {"topic1": ["B", "C"], "topic2": ["B", "C"]},
        "messages": [
            {"topics": ["topic1"], "data": b"foo", "node_id": "A"},
            {"topics": ["topic2"], "data": b"Alex is tall", "node_id": "A"},
        ],
    },
    {
        "name": "two_nodes_one_topic_single_subscriber_is_sender",
        "supported_protocols": SUPPORTED_PROTOCOLS,
        "adj_list": {"A": ["B"]},
        "topic_map": {"topic1": ["B"]},
        "messages": [{"topics": ["topic1"], "data": b"Alex is tall", "node_id": "B"}],
    },
    {
        "name": "two_nodes_one_topic_two_msgs",
        "supported_protocols": SUPPORTED_PROTOCOLS,
        "adj_list": {"A": ["B"]},
        "topic_map": {"topic1": ["B"]},
        "messages": [
            {"topics": ["topic1"], "data": b"Alex is tall", "node_id": "B"},
            {"topics": ["topic1"], "data": b"foo", "node_id": "A"},
        ],
    },
    {
        "name": "seven_nodes_tree_one_topics",
        "supported_protocols": SUPPORTED_PROTOCOLS,
        "adj_list": {"1": ["2", "3"], "2": ["4", "5"], "3": ["6", "7"]},
        "topic_map": {"astrophysics": ["2", "3", "4", "5", "6", "7"]},
        "messages": [{"topics": ["astrophysics"], "data": b"e=mc^2", "node_id": "1"}],
    },
    {
        "name": "seven_nodes_tree_three_topics",
        "supported_protocols": SUPPORTED_PROTOCOLS,
        "adj_list": {"1": ["2", "3"], "2": ["4", "5"], "3": ["6", "7"]},
        "topic_map": {
            "astrophysics": ["2", "3", "4", "5", "6", "7"],
            "space": ["2", "3", "4", "5", "6", "7"],
            "onions": ["2", "3", "4", "5", "6", "7"],
        },
        "messages": [
            {"topics": ["astrophysics"], "data": b"e=mc^2", "node_id": "1"},
            {"topics": ["space"], "data": b"foobar", "node_id": "1"},
            {"topics": ["onions"], "data": b"I am allergic", "node_id": "1"},
        ],
    },
    {
        "name": "seven_nodes_tree_three_topics_diff_origin",
        "supported_protocols": SUPPORTED_PROTOCOLS,
        "adj_list": {"1": ["2", "3"], "2": ["4", "5"], "3": ["6", "7"]},
        "topic_map": {
            "astrophysics": ["1", "2", "3", "4", "5", "6", "7"],
            "space": ["1", "2", "3", "4", "5", "6", "7"],
            "onions": ["1", "2", "3", "4", "5", "6", "7"],
        },
        "messages": [
            {"topics": ["astrophysics"], "data": b"e=mc^2", "node_id": "1"},
            {"topics": ["space"], "data": b"foobar", "node_id": "4"},
            {"topics": ["onions"], "data": b"I am allergic", "node_id": "7"},
        ],
    },
    {
        "name": "three_nodes_clique_two_topic_diff_origin",
        "supported_protocols": SUPPORTED_PROTOCOLS,
        "adj_list": {"1": ["2", "3"], "2": ["3"]},
        "topic_map": {"astrophysics": ["1", "2", "3"], "school": ["1", "2", "3"]},
        "messages": [
            {"topics": ["astrophysics"], "data": b"e=mc^2", "node_id": "1"},
            {"topics": ["school"], "data": b"foobar", "node_id": "2"},
            {"topics": ["astrophysics"], "data": b"I am allergic", "node_id": "1"},
        ],
    },
    {
        "name": "four_nodes_clique_two_topic_diff_origin_many_msgs",
        "supported_protocols": SUPPORTED_PROTOCOLS,
        "adj_list": {
            "1": ["2", "3", "4"],
            "2": ["1", "3", "4"],
            "3": ["1", "2", "4"],
            "4": ["1", "2", "3"],
        },
        "topic_map": {
            "astrophysics": ["1", "2", "3", "4"],
            "school": ["1", "2", "3", "4"],
        },
        "messages": [
            {"topics": ["astrophysics"], "data": b"e=mc^2", "node_id": "1"},
            {"topics": ["school"], "data": b"foobar", "node_id": "2"},
            {"topics": ["astrophysics"], "data": b"I am allergic", "node_id": "1"},
            {"topics": ["school"], "data": b"foobar2", "node_id": "2"},
            {"topics": ["astrophysics"], "data": b"I am allergic2", "node_id": "1"},
            {"topics": ["school"], "data": b"foobar3", "node_id": "2"},
            {"topics": ["astrophysics"], "data": b"I am allergic3", "node_id": "1"},
        ],
    },
    {
        "name": "five_nodes_ring_two_topic_diff_origin_many_msgs",
        "supported_protocols": SUPPORTED_PROTOCOLS,
        "adj_list": {"1": ["2"], "2": ["3"], "3": ["4"], "4": ["5"], "5": ["1"]},
        "topic_map": {
            "astrophysics": ["1", "2", "3", "4", "5"],
            "school": ["1", "2", "3", "4", "5"],
        },
        "messages": [
            {"topics": ["astrophysics"], "data": b"e=mc^2", "node_id": "1"},
            {"topics": ["school"], "data": b"foobar", "node_id": "2"},
            {"topics": ["astrophysics"], "data": b"I am allergic", "node_id": "1"},
            {"topics": ["school"], "data": b"foobar2", "node_id": "2"},
            {"topics": ["astrophysics"], "data": b"I am allergic2", "node_id": "1"},
            {"topics": ["school"], "data": b"foobar3", "node_id": "2"},
            {"topics": ["astrophysics"], "data": b"I am allergic3", "node_id": "1"},
        ],
    },
]

floodsub_protocol_pytest_params = [
    pytest.param(test_case, id=test_case["name"])
    for test_case in FLOODSUB_PROTOCOL_TEST_CASES
]


async def perform_test_from_obj(obj, router_factory):
    """
    Perform pubsub tests from a test obj.
    test obj are composed as follows:

    {
        "supported_protocols": ["supported/protocol/1.0.0",...],
        "adj_list": {
            "node1": ["neighbor1_of_node1", "neighbor2_of_node1", ...],
            "node2": ["neighbor1_of_node2", "neighbor2_of_node2", ...],
            ...
        },
        "topic_map": {
            "topic1": ["node1_subscribed_to_topic1", "node2_subscribed_to_topic1", ...]
        },
        "messages": [
            {
                "topics": ["topic1_for_message", "topic2_for_message", ...],
                "data": b"some contents of the message (newlines are not supported)",
                "node_id": "message sender node id"
            },
            ...
        ]
    }
    NOTE: In adj_list, for any neighbors A and B, only list B as a neighbor of A
    or B as a neighbor of A once. Do NOT list both A: ["B"] and B:["A"] as the behavior
    is undefined (even if it may work)
    """

    # Step 1) Create graph
    adj_list = obj["adj_list"]
    node_map = {}
    pubsub_map = {}

    async def add_node(node_id_str: str) -> None:
        pubsub_router = router_factory(protocols=obj["supported_protocols"])
        pubsub = PubsubFactory(router=pubsub_router)
        await pubsub.host.get_network().listen(LISTEN_MADDR)
        node_map[node_id_str] = pubsub.host
        pubsub_map[node_id_str] = pubsub

    tasks_connect = []
    for start_node_id in adj_list:
        # Create node if node does not yet exist
        if start_node_id not in node_map:
            await add_node(start_node_id)

        # For each neighbor of start_node, create if does not yet exist,
        # then connect start_node to neighbor
        for neighbor_id in adj_list[start_node_id]:
            # Create neighbor if neighbor does not yet exist
            if neighbor_id not in node_map:
                await add_node(neighbor_id)
            tasks_connect.append(
                connect(node_map[start_node_id], node_map[neighbor_id])
            )
    # Connect nodes and wait at least for 2 seconds
    await asyncio.gather(*tasks_connect, asyncio.sleep(2))

    # Step 2) Subscribe to topics
    queues_map = {}
    topic_map = obj["topic_map"]

    tasks_topic = []
    tasks_topic_data = []
    for topic, node_ids in topic_map.items():
        for node_id in node_ids:
            tasks_topic.append(pubsub_map[node_id].subscribe(topic))
            tasks_topic_data.append((node_id, topic))
    tasks_topic.append(asyncio.sleep(2))

    # Gather is like Promise.all
    responses = await asyncio.gather(*tasks_topic)
    for i in range(len(responses) - 1):
        node_id, topic = tasks_topic_data[i]
        if node_id not in queues_map:
            queues_map[node_id] = {}
        # Store queue in topic-queue map for node
        queues_map[node_id][topic] = responses[i]

    # Allow time for subscribing before continuing
    await asyncio.sleep(0.01)

    # Step 3) Publish messages
    topics_in_msgs_ordered = []
    messages = obj["messages"]
    tasks_publish = []

    for msg in messages:
        topics = msg["topics"]
        data = msg["data"]
        node_id = msg["node_id"]

        # Publish message
        # TODO: Should be single RPC package with several topics
        for topic in topics:
            tasks_publish.append(pubsub_map[node_id].publish(topic, data))

        # For each topic in topics, add (topic, node_id, data) tuple to ordered test list
        for topic in topics:
            topics_in_msgs_ordered.append((topic, node_id, data))

    # Allow time for publishing before continuing
    await asyncio.gather(*tasks_publish, asyncio.sleep(2))

    # Step 4) Check that all messages were received correctly.
    for topic, origin_node_id, data in topics_in_msgs_ordered:
        # Look at each node in each topic
        for node_id in topic_map[topic]:
            # Get message from subscription queue
            msg = await queues_map[node_id][topic].get()
            assert data == msg.data
            # Check the message origin
            assert node_map[origin_node_id].get_id().to_bytes() == msg.from_id

    # Success, terminate pending tasks.
    await cleanup()