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#  license agreements. See the NOTICE file distributed with
#  this work for additional information regarding copyright
#  ownership. Elasticsearch B.V. licenses this file to you under
#  the Apache License, Version 2.0 (the "License"); you may
#  not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
# 	http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing,
#  software distributed under the License is distributed on an
#  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
#  KIND, either express or implied.  See the License for the
#  specific language governing permissions and limitations
#  under the License.

"""
Dynamically generated set of TestCases based on set of yaml files describing
some integration tests. These files are shared among all official Elasticsearch
clients.
"""
import inspect
import json
import warnings

import pytest

from elasticsearch import ElasticsearchWarning, RequestError

from ...test_server.test_rest_api_spec import (
    API_PARAMS_RENAMES,
    IMPLEMENTED_FEATURES,
    PARAMS_RENAMES,
    RUN_ASYNC_REST_API_TESTS,
    YAML_TEST_SPECS,
    YamlRunner,
)
from ...utils import parse_version

pytestmark = pytest.mark.anyio

XPACK_FEATURES = None
ES_VERSION = None


@pytest.fixture
def anyio_backend():
    # we want to only run the YAML tests once, no need to also do trio here
    return "asyncio"


async def await_if_coro(x):
    if inspect.iscoroutine(x):
        return await x
    return x


class AsyncYamlRunner(YamlRunner):
    async def setup(self):
        # Pull skips from individual tests to not do unnecessary setup.
        skip_code = []
        for action in self._run_code:
            assert len(action) == 1
            action_type, _ = list(action.items())[0]
            if action_type == "skip":
                skip_code.append(action)
            else:
                break

        if self._setup_code or skip_code:
            self.section("setup")
        if skip_code:
            await self.run_code(skip_code)
        if self._setup_code:
            await self.run_code(self._setup_code)

    async def teardown(self):
        if self._teardown_code:
            self.section("teardown")
            await self.run_code(self._teardown_code)

    async def es_version(self):
        global ES_VERSION
        if ES_VERSION is None:
            version_string = (await self.client.info())["version"]["number"]
            if "." not in version_string:
                return ()
            version = version_string.strip().split(".")
            ES_VERSION = tuple(int(v) if v.isdigit() else 999 for v in version)
        return ES_VERSION

    def section(self, name):
        print(("=" * 10) + " " + name + " " + ("=" * 10))

    async def run(self):
        try:
            await self.setup()
            self.section("test")
            await self.run_code(self._run_code)
        finally:
            try:
                await self.teardown()
            except Exception:
                pass

    async def run_code(self, test):
        """Execute an instruction based on it's type."""
        for action in test:
            assert len(action) == 1
            action_type, action = list(action.items())[0]
            print(action_type, action)

            if hasattr(self, "run_" + action_type):
                await await_if_coro(getattr(self, "run_" + action_type)(action))
            else:
                raise RuntimeError(f"Invalid action type {action_type!r}")

    async def run_do(self, action):
        api = self.client
        headers = action.pop("headers", None)
        catch = action.pop("catch", None)
        warn = action.pop("warnings", ())
        allowed_warnings = action.pop("allowed_warnings", ())
        assert len(action) == 1

        # Remove the x_pack_rest_user authentication
        # if it's given via headers. We're already authenticated
        # via the 'elastic' user.
        if (
            headers
            and headers.get("Authorization", None)
            == "Basic eF9wYWNrX3Jlc3RfdXNlcjp4LXBhY2stdGVzdC1wYXNzd29yZA=="
        ):
            headers.pop("Authorization")

        method, args = list(action.items())[0]

        if headers:
            args["headers"] = headers

        # locate api endpoint
        for m in method.split("."):
            if not hasattr(api, m):
                pytest.skip("This API isn't implemented yet")
            api = getattr(api, m)

        # Sometimes the 'body' parameter is encoded as a string instead of raw.
        if "body" in args:
            try:
                args["body"] = json.loads(args["body"])
            except (TypeError, ValueError):
                pass

            if isinstance(args["body"], dict):
                # Detect when there are duplicate options that aren't the same value.
                # In this case the test isn't testing the client, it's testing Elasticsearch
                # and its ability to reject multiple values so we either combine
                # like values or skip the test entirely as unnecessary for the client.
                duplicate_args = set(args["body"]).intersection(args)
                if duplicate_args:
                    for arg in list(duplicate_args):
                        if args["body"][arg] == args[arg]:
                            args["body"].pop(arg)
                        else:
                            pytest.skip(
                                "Contains a duplicate parameter with a different value"
                            )

        # some parameters had to be renamed to not clash with python builtins,
        # compensate
        renames = PARAMS_RENAMES.copy()
        renames.update(API_PARAMS_RENAMES.get(method, {}))
        for k in renames:
            if k in args:
                args[renames[k]] = args.pop(k)

        # resolve vars
        for k in args:
            args[k] = self._resolve(args[k])

        warnings.simplefilter("always", category=ElasticsearchWarning)
        with warnings.catch_warnings(record=True) as caught_warnings:
            try:
                self.last_response = (await api(**args)).body
            except Exception as e:
                self._skip_intentional_type_errors(e)
                if not catch:
                    raise
                self.run_catch(catch, e)
            else:
                if catch:
                    raise AssertionError(
                        f"Failed to catch {catch!r} in {self.last_response!r}."
                    )

        # Filter out warnings raised by other components.
        caught_warnings = [
            str(w.message)
            for w in caught_warnings
            if w.category == ElasticsearchWarning
            and str(w.message) not in allowed_warnings
        ]

        # Sorting removes the issue with order raised. We only care about
        # if all warnings are raised in the single API call.
        if warn and sorted(warn) != sorted(caught_warnings):
            raise AssertionError(
                "Expected warnings not equal to actual warnings: expected=%r actual=%r"
                % (warn, caught_warnings)
            )

    async def run_skip(self, skip):
        if "features" in skip:
            features = skip["features"]
            if not isinstance(features, (tuple, list)):
                features = [features]
            for feature in features:
                if feature in IMPLEMENTED_FEATURES:
                    continue
                pytest.skip(f"feature '{feature}' is not supported")

        if "version" in skip:
            version, reason = skip["version"], skip["reason"]
            if version == "all":
                pytest.skip(reason)
            min_version, _, max_version = version.partition("-")
            min_version = parse_version(min_version.strip()) or (0,)
            max_version = parse_version(max_version.strip()) or (999,)
            if min_version <= (await self.es_version()) <= max_version:
                pytest.skip(reason)

    async def _feature_enabled(self, name):
        global XPACK_FEATURES
        if XPACK_FEATURES is None:
            try:
                xinfo = await self.client.xpack.info()
                XPACK_FEATURES = {
                    f for f in xinfo["features"] if xinfo["features"][f]["enabled"]
                }
                IMPLEMENTED_FEATURES.add("xpack")
            except RequestError:
                XPACK_FEATURES = set()
                IMPLEMENTED_FEATURES.add("no_xpack")
        return name in XPACK_FEATURES


@pytest.fixture(scope="function")
def async_runner(async_client_factory):
    return AsyncYamlRunner(async_client_factory)


if RUN_ASYNC_REST_API_TESTS:

    @pytest.mark.parametrize("test_spec", YAML_TEST_SPECS)
    async def test_rest_api_spec(test_spec, async_runner):
        if test_spec.get("fail", False):
            pytest.xfail("Manually marked as failing in 'FAILING_TESTS'")
        elif test_spec.get("skip", False):
            pytest.xfail("Manually skipped")
        async_runner.use_spec(test_spec)
        await async_runner.run()
