import asyncio
import json
from time import time
from urllib.parse import quote

import pytest
from slack_sdk.signature import SignatureVerifier
from slack_sdk.web.async_client import AsyncWebClient

from slack_bolt.async_app import AsyncApp
from slack_bolt.request.async_request import AsyncBoltRequest
from tests.mock_web_api_server import (
    setup_mock_web_api_server,
    cleanup_mock_web_api_server,
)
from tests.utils import remove_os_env_temporarily, restore_os_env


class TestAsyncLazy:
    signing_secret = "secret"
    valid_token = "xoxb-valid"
    mock_api_server_base_url = "http://localhost:8888"
    signature_verifier = SignatureVerifier(signing_secret)
    web_client = AsyncWebClient(
        token=valid_token,
        base_url=mock_api_server_base_url,
    )

    @pytest.fixture
    def event_loop(self):
        old_os_env = remove_os_env_temporarily()
        try:
            setup_mock_web_api_server(self)
            loop = asyncio.get_event_loop()
            yield loop
            loop.close()
            cleanup_mock_web_api_server(self)
        finally:
            restore_os_env(old_os_env)

    # ----------------
    #  utilities
    # ----------------

    def generate_signature(self, body: str, timestamp: str):
        return self.signature_verifier.generate_signature(
            body=body,
            timestamp=timestamp,
        )

    def build_headers(self, timestamp: str, body: str):
        return {
            "content-type": ["application/x-www-form-urlencoded"],
            "x-slack-signature": [self.generate_signature(body, timestamp)],
            "x-slack-request-timestamp": [timestamp],
        }

    def build_valid_request(self) -> AsyncBoltRequest:
        body = {
            "type": "block_actions",
            "user": {
                "id": "W111",
            },
            "api_app_id": "A111",
            "token": "verification_token",
            "trigger_id": "111.222.valid",
            "team": {
                "id": "T111",
            },
            "channel": {"id": "C111", "name": "test-channel"},
            "response_url": "https://hooks.slack.com/actions/T111/111/random-value",
            "actions": [
                {
                    "action_id": "a",
                    "block_id": "b",
                    "text": {"type": "plain_text", "text": "Button"},
                    "value": "click_me_123",
                    "type": "button",
                    "action_ts": "1596530385.194939",
                }
            ],
        }
        raw_body = f"payload={quote(json.dumps(body))}"
        timestamp = str(int(time()))
        return AsyncBoltRequest(body=raw_body, headers=self.build_headers(timestamp, raw_body))

    # ----------------
    #  tests
    # ----------------

    @pytest.mark.asyncio
    async def test_lazy(self):
        async def just_ack(ack):
            await ack()

        async def async1(say):
            await asyncio.sleep(0.3)
            await say(text="lazy function 1")

        async def async2(say):
            await asyncio.sleep(0.5)
            await say(text="lazy function 2")

        app = AsyncApp(
            client=self.web_client,
            signing_secret=self.signing_secret,
        )
        app.action("a")(
            ack=just_ack,
            lazy=[async1, async2],
        )

        request = self.build_valid_request()
        response = await app.async_dispatch(request)
        assert response.status == 200
        await asyncio.sleep(1)  # wait a bit
        assert self.mock_received_requests["/chat.postMessage"] == 2

    @pytest.mark.asyncio
    async def test_issue_545_context_copy_failure(self):
        async def just_ack(ack):
            await ack()

        async def async1(context, say):
            assert context.get("foo") == "FOO"
            assert context.get("ssl_context") is None
            await asyncio.sleep(0.3)
            await say(text="lazy function 1")

        async def async2(context, say):
            assert context.get("foo") == "FOO"
            assert context.get("ssl_context") is None
            await asyncio.sleep(0.5)
            await say(text="lazy function 2")

        app = AsyncApp(
            client=self.web_client,
            signing_secret=self.signing_secret,
        )

        @app.middleware
        async def set_ssl_context(context, next_):
            from ssl import SSLContext

            context["foo"] = "FOO"
            # This causes an error when starting lazy listener executions
            context["ssl_context"] = SSLContext()
            await next_()

        # 2021-12-13 11:52:46 ERROR Failed to run a middleware function (error: cannot pickle 'SSLContext' object)
        # Traceback (most recent call last):
        #   File "/path/to/bolt-python/slack_bolt/app/async_app.py", line 585, in async_dispatch
        #     ] = await self._async_listener_runner.run(
        #   File "/path/to/bolt-python/slack_bolt/listener/asyncio_runner.py", line 167, in run
        #     self._start_lazy_function(lazy_func, request)
        #   File "/path/to/bolt-python/slack_bolt/listener/asyncio_runner.py", line 194, in _start_lazy_function
        #     copied_request = self._build_lazy_request(request, func_name)
        #   File "/path/to/bolt-python/slack_bolt/listener/asyncio_runner.py", line 201, in _build_lazy_request
        #     copied_request = create_copy(request)
        #   File "/path/to/bolt-python/slack_bolt/util/utils.py", line 48, in create_copy
        #     return copy.deepcopy(original)
        #   File "/path/to/python/lib/python3.9/copy.py", line 172, in deepcopy
        #     y = _reconstruct(x, memo, *rv)
        #   File "/path/to/python/lib/python3.9/copy.py", line 270, in _reconstruct
        #     state = deepcopy(state, memo)
        #   File "/path/to/python/lib/python3.9/copy.py", line 146, in deepcopy
        #     y = copier(x, memo)
        #   File "/path/to/python/lib/python3.9/copy.py", line 230, in _deepcopy_dict
        #     y[deepcopy(key, memo)] = deepcopy(value, memo)
        #   File "/path/to/python/lib/python3.9/copy.py", line 172, in deepcopy
        #     y = _reconstruct(x, memo, *rv)
        #   File "/path/to/python/lib/python3.9/copy.py", line 296, in _reconstruct
        #     value = deepcopy(value, memo)
        #   File "/path/to/python/lib/python3.9/copy.py", line 161, in deepcopy
        #     rv = reductor(4)
        # TypeError: cannot pickle 'SSLContext' object

        app.action("a")(
            ack=just_ack,
            lazy=[async1, async2],
        )

        request = self.build_valid_request()
        response = await app.async_dispatch(request)
        assert response.status == 200
        await asyncio.sleep(1)  # wait a bit
        assert self.mock_received_requests["/chat.postMessage"] == 2