import re

from http import HTTPStatus
from typing import List
from unittest import mock

import orjson
import pytest

from fastapi.testclient import TestClient
from redis.client import Pipeline

import aurweb.models.dependency_type as dt
import aurweb.models.relation_type as rt

from aurweb import asgi, config, db, rpc, scripts, time
from aurweb.models.account_type import USER_ID
from aurweb.models.license import License
from aurweb.models.package import Package
from aurweb.models.package_base import PackageBase
from aurweb.models.package_dependency import PackageDependency
from aurweb.models.package_keyword import PackageKeyword
from aurweb.models.package_license import PackageLicense
from aurweb.models.package_relation import PackageRelation
from aurweb.models.package_vote import PackageVote
from aurweb.models.user import User
from aurweb.redis import redis_connection


@pytest.fixture
def client() -> TestClient:
    yield TestClient(app=asgi.app)


@pytest.fixture
def user(db_test) -> User:
    with db.begin():
        user = db.create(User, Username="test", Email="test@example.org",
                         RealName="Test User 1", Passwd=str(),
                         AccountTypeID=USER_ID)
    yield user


@pytest.fixture
def user2() -> User:
    with db.begin():
        user = db.create(User, Username="user2", Email="user2@example.org",
                         RealName="Test User 2", Passwd=str(),
                         AccountTypeID=USER_ID)
    yield user


@pytest.fixture
def user3() -> User:
    with db.begin():
        user = db.create(User, Username="user3", Email="user3@example.org",
                         RealName="Test User 3", Passwd=str(),
                         AccountTypeID=USER_ID)
    yield user


@pytest.fixture
def packages(user: User, user2: User, user3: User) -> List[Package]:
    output = []

    # Create package records used in our tests.
    with db.begin():
        pkgbase = db.create(PackageBase, Name="big-chungus",
                            Maintainer=user, Packager=user)
        pkg = db.create(Package, PackageBase=pkgbase, Name=pkgbase.Name,
                        Description="Bunny bunny around bunny",
                        URL="https://example.com/")
        output.append(pkg)

        pkgbase = db.create(PackageBase, Name="chungy-chungus",
                            Maintainer=user, Packager=user)
        pkg = db.create(Package, PackageBase=pkgbase, Name=pkgbase.Name,
                        Description="Wubby wubby on wobba wuubu",
                        URL="https://example.com/")
        output.append(pkg)

        pkgbase = db.create(PackageBase, Name="gluggly-chungus",
                            Maintainer=user, Packager=user)
        pkg = db.create(Package, PackageBase=pkgbase, Name=pkgbase.Name,
                        Description="glurrba glurrba gur globba",
                        URL="https://example.com/")
        output.append(pkg)

        pkgbase = db.create(PackageBase, Name="fugly-chungus",
                            Maintainer=user, Packager=user)

        desc = "A Package belonging to a PackageBase with another name."
        pkg = db.create(Package, PackageBase=pkgbase, Name="other-pkg",
                        Description=desc, URL="https://example.com")
        output.append(pkg)

        pkgbase = db.create(PackageBase, Name="woogly-chungus")
        pkg = db.create(Package, PackageBase=pkgbase, Name=pkgbase.Name,
                        Description="wuggla woblabeloop shemashmoop",
                        URL="https://example.com/")
        output.append(pkg)

    # Setup a few more related records on the first package:
    # a license, some keywords and some votes.
    with db.begin():
        lic = db.create(License, Name="GPL")
        db.create(PackageLicense, Package=output[0], License=lic)

        for keyword in ["big-chungus", "smol-chungus", "sizeable-chungus"]:
            db.create(PackageKeyword,
                      PackageBase=output[0].PackageBase,
                      Keyword=keyword)

        now = time.utcnow()
        for user_ in [user, user2, user3]:
            db.create(PackageVote, User=user_,
                      PackageBase=output[0].PackageBase, VoteTS=now)
    scripts.popupdate.run_single(output[0].PackageBase)

    yield output


@pytest.fixture
def depends(packages: List[Package]) -> List[PackageDependency]:
    output = []

    with db.begin():
        dep = db.create(PackageDependency,
                        Package=packages[0],
                        DepTypeID=dt.DEPENDS_ID,
                        DepName="chungus-depends")
        output.append(dep)

        dep = db.create(PackageDependency,
                        Package=packages[1],
                        DepTypeID=dt.DEPENDS_ID,
                        DepName="chungy-depends")
        output.append(dep)

        dep = db.create(PackageDependency,
                        Package=packages[0],
                        DepTypeID=dt.OPTDEPENDS_ID,
                        DepName="chungus-optdepends",
                        DepCondition="=50")
        output.append(dep)

        dep = db.create(PackageDependency,
                        Package=packages[0],
                        DepTypeID=dt.MAKEDEPENDS_ID,
                        DepName="chungus-makedepends")
        output.append(dep)

        dep = db.create(PackageDependency,
                        Package=packages[0],
                        DepTypeID=dt.CHECKDEPENDS_ID,
                        DepName="chungus-checkdepends")
        output.append(dep)

    yield output


@pytest.fixture
def relations(user: User, packages: List[Package]) -> List[PackageRelation]:
    output = []

    with db.begin():
        rel = db.create(PackageRelation,
                        Package=packages[0],
                        RelTypeID=rt.CONFLICTS_ID,
                        RelName="chungus-conflicts")
        output.append(rel)

        rel = db.create(PackageRelation,
                        Package=packages[1],
                        RelTypeID=rt.CONFLICTS_ID,
                        RelName="chungy-conflicts")
        output.append(rel)

        rel = db.create(PackageRelation,
                        Package=packages[0],
                        RelTypeID=rt.PROVIDES_ID,
                        RelName="chungus-provides",
                        RelCondition="<=200")
        output.append(rel)

        rel = db.create(PackageRelation,
                        Package=packages[0],
                        RelTypeID=rt.REPLACES_ID,
                        RelName="chungus-replaces",
                        RelCondition="<=200")
        output.append(rel)

    # Finally, yield the packages.
    yield output


@pytest.fixture(autouse=True)
def setup(db_test):
    # Create some extra package relationships.
    pass


@pytest.fixture
def pipeline():
    redis = redis_connection()
    pipeline = redis.pipeline()

    # The 'testclient' host is used when requesting the app
    # via fastapi.testclient.TestClient.
    pipeline.delete("ratelimit-ws:testclient")
    pipeline.delete("ratelimit:testclient")
    pipeline.execute()

    yield pipeline


def test_rpc_documentation(client: TestClient):
    with client as request:
        resp = request.get("/rpc")
    assert resp.status_code == int(HTTPStatus.OK)
    assert "aurweb RPC Interface" in resp.text


def test_rpc_documentation_missing():
    config_get = config.get

    def mock_get(section: str, key: str) -> str:
        if section == "options" and key == "aurwebdir":
            return "/missing"
        return config_get(section, key)

    with mock.patch("aurweb.config.get", side_effect=mock_get):
        config.rehash()
        expr = r"^doc/rpc\.html could not be read$"
        with pytest.raises(OSError, match=expr):
            rpc.documentation()
    config.rehash()


def test_rpc_singular_info(client: TestClient,
                           user: User,
                           packages: List[Package],
                           depends: List[PackageDependency],
                           relations: List[PackageRelation]):
    # Define expected response.
    pkg = packages[0]
    expected_data = {
        "version": 5,
        "results": [{
            "Name": pkg.Name,
            "Version": pkg.Version,
            "Description": pkg.Description,
            "URL": pkg.URL,
            "PackageBase": pkg.PackageBase.Name,
            "NumVotes": pkg.PackageBase.NumVotes,
            "Popularity": float(pkg.PackageBase.Popularity),
            "OutOfDate": None,
            "Maintainer": user.Username,
            "URLPath": f"/cgit/aur.git/snapshot/{pkg.Name}.tar.gz",
            "Depends": ["chungus-depends"],
            "OptDepends": ["chungus-optdepends=50"],
            "MakeDepends": ["chungus-makedepends"],
            "CheckDepends": ["chungus-checkdepends"],
            "Conflicts": ["chungus-conflicts"],
            "Provides": ["chungus-provides<=200"],
            "Replaces": ["chungus-replaces<=200"],
            "License": [pkg.package_licenses.first().License.Name],
            "Keywords": [
                "big-chungus",
                "sizeable-chungus",
                "smol-chungus"
            ]
        }],
        "resultcount": 1,
        "type": "multiinfo"
    }

    # Make dummy request.
    with client as request:
        resp = request.get("/rpc", params={
            "v": 5,
            "type": "info",
            "arg": ["chungy-chungus", "big-chungus"],
        })

    # Load  request response into Python dictionary.
    response_data = orjson.loads(resp.text)

    # Remove the FirstSubmitted LastModified, ID and PackageBaseID keys from
    # reponse, as the key's values aren't guaranteed to match between the two
    # (the keys are already removed from 'expected_data').
    for i in ["FirstSubmitted", "LastModified", "ID", "PackageBaseID"]:
        response_data["results"][0].pop(i)

    # Validate that the new dictionaries are the same.
    assert response_data == expected_data


def test_rpc_nonexistent_package(client: TestClient):
    # Make dummy request.
    with client as request:
        response = request.get("/rpc/?v=5&type=info&arg=nonexistent-package")

    # Load request response into Python dictionary.
    response_data = orjson.loads(response.content.decode())

    # Validate data.
    assert response_data["resultcount"] == 0


def test_rpc_multiinfo(client: TestClient, packages: List[Package]):
    # Make dummy request.
    request_packages = ["big-chungus", "chungy-chungus"]
    with client as request:
        response = request.get("/rpc", params={
            "v": 5, "type": "info", "arg[]": request_packages
        })

    # Load request response into Python dictionary.
    response_data = orjson.loads(response.content.decode())

    # Validate data.
    for i in response_data["results"]:
        request_packages.remove(i["Name"])

    assert request_packages == []


def test_rpc_mixedargs(client: TestClient, packages: List[Package]):
    # Make dummy request.
    response1_packages = ["gluggly-chungus"]
    response2_packages = ["gluggly-chungus", "chungy-chungus"]

    with client as request:
        # Supply all of the args in the url to enforce ordering.
        response1 = request.get(
            "/rpc?v=5&arg[]=big-chungus&arg=gluggly-chungus&type=info")
    assert response1.status_code == int(HTTPStatus.OK)

    with client as request:
        response2 = request.get(
            "/rpc?v=5&arg=big-chungus&arg[]=gluggly-chungus"
            "&type=info&arg[]=chungy-chungus")
    assert response1.status_code == int(HTTPStatus.OK)

    # Load request response into Python dictionary.
    response1_data = orjson.loads(response1.content.decode())
    response2_data = orjson.loads(response2.content.decode())

    # Validate data.
    for i in response1_data["results"]:
        response1_packages.remove(i["Name"])

    for i in response2_data["results"]:
        response2_packages.remove(i["Name"])

    for i in [response1_packages, response2_packages]:
        assert i == []


def test_rpc_no_dependencies_omits_key(client: TestClient, user: User,
                                       packages: List[Package],
                                       depends: List[PackageDependency],
                                       relations: List[PackageRelation]):
    """
    This makes sure things like 'MakeDepends' get removed from JSON strings
    when they don't have set values.
    """
    pkg = packages[1]
    expected_response = {
        'version': 5,
        'results': [{
            'Name': pkg.Name,
            'Version': pkg.Version,
            'Description': pkg.Description,
            'URL': pkg.URL,
            'PackageBase': pkg.PackageBase.Name,
            'NumVotes': pkg.PackageBase.NumVotes,
            'Popularity': int(pkg.PackageBase.Popularity),
            'OutOfDate': None,
            'Maintainer': user.Username,
            'URLPath': '/cgit/aur.git/snapshot/chungy-chungus.tar.gz',
            'Depends': ['chungy-depends'],
            'Conflicts': ['chungy-conflicts'],
            'License': [],
            'Keywords': []
        }],
        'resultcount': 1,
        'type': 'multiinfo'
    }

    # Make dummy request.
    with client as request:
        response = request.get("/rpc", params={
            "v": 5, "type": "info", "arg": "chungy-chungus"
        })
    response_data = orjson.loads(response.content.decode())

    # Remove inconsistent keys.
    for i in ["ID", "PackageBaseID", "FirstSubmitted", "LastModified"]:
        response_data["results"][0].pop(i)

    assert response_data == expected_response


def test_rpc_bad_type(client: TestClient):
    # Define expected response.
    expected_data = {
        'version': 5,
        'results': [],
        'resultcount': 0,
        'type': 'error',
        'error': 'Incorrect request type specified.'
    }

    # Make dummy request.
    with client as request:
        response = request.get("/rpc", params={
            "v": 5, "type": "invalid-type", "arg": "big-chungus"
        })

    # Load  request response into Python dictionary.
    response_data = orjson.loads(response.content.decode())

    # Validate data.
    assert expected_data == response_data


def test_rpc_bad_version(client: TestClient):
    # Define expected response.
    expected_data = {
        'version': 0,
        'resultcount': 0,
        'results': [],
        'type': 'error',
        'error': 'Invalid version specified.'
    }

    # Make dummy request.
    with client as request:
        response = request.get("/rpc", params={
            "v": 0, "type": "info", "arg": "big-chungus"
        })

    # Load  request response into Python dictionary.
    response_data = orjson.loads(response.content.decode())

    # Validate data.
    assert expected_data == response_data


def test_rpc_no_version(client: TestClient):
    # Define expected response.
    expected_data = {
        'version': None,
        'resultcount': 0,
        'results': [],
        'type': 'error',
        'error': 'Please specify an API version.'
    }

    # Make dummy request.
    with client as request:
        response = request.get("/rpc", params={
            "type": "info",
            "arg": "big-chungus"
        })

    # Load  request response into Python dictionary.
    response_data = orjson.loads(response.content.decode())

    # Validate data.
    assert expected_data == response_data


def test_rpc_no_type(client: TestClient):
    # Define expected response.
    expected_data = {
        'version': 5,
        'results': [],
        'resultcount': 0,
        'type': 'error',
        'error': 'No request type/data specified.'
    }

    # Make dummy request.
    with client as request:
        response = request.get("/rpc", params={"v": 5, "arg": "big-chungus"})

    # Load  request response into Python dictionary.
    response_data = orjson.loads(response.content.decode())

    # Validate data.
    assert expected_data == response_data


def test_rpc_no_args(client: TestClient):
    # Define expected response.
    expected_data = {
        'version': 5,
        'results': [],
        'resultcount': 0,
        'type': 'error',
        'error': 'No request type/data specified.'
    }

    # Make dummy request.
    with client as request:
        response = request.get("/rpc", params={"v": 5, "type": "info"})

    # Load  request response into Python dictionary.
    response_data = orjson.loads(response.content.decode())

    # Validate data.
    assert expected_data == response_data


def test_rpc_no_maintainer(client: TestClient, packages: List[Package]):
    # Make dummy request.
    with client as request:
        response = request.get("/rpc", params={
            "v": 5, "type": "info", "arg": "woogly-chungus"
        })

    # Load  request response into Python dictionary.
    response_data = orjson.loads(response.content.decode())

    # Validate data.
    assert response_data["results"][0]["Maintainer"] is None


def test_rpc_suggest_pkgbase(client: TestClient, packages: List[Package]):
    params = {"v": 5, "type": "suggest-pkgbase", "arg": "big"}
    with client as request:
        response = request.get("/rpc", params=params)
    data = response.json()
    assert data == ["big-chungus"]

    params["arg"] = "chungy"
    with client as request:
        response = request.get("/rpc", params=params)
    data = response.json()
    assert data == ["chungy-chungus"]

    # Test no arg supplied.
    del params["arg"]
    with client as request:
        response = request.get("/rpc", params=params)
    data = response.json()
    assert data == []


def test_rpc_suggest(client: TestClient, packages: List[Package]):
    params = {"v": 5, "type": "suggest", "arg": "other"}
    with client as request:
        response = request.get("/rpc", params=params)
    data = response.json()
    assert data == ["other-pkg"]

    # Test non-existent Package.
    params["arg"] = "nonexistent"
    with client as request:
        response = request.get("/rpc", params=params)
    data = response.json()
    assert data == []

    # Test no arg supplied.
    del params["arg"]
    with client as request:
        response = request.get("/rpc", params=params)
    data = response.json()
    assert data == []


def mock_config_getint(section: str, key: str):
    if key == "request_limit":
        return 4
    elif key == "window_length":
        return 100
    return config.getint(section, key)


@mock.patch("aurweb.config.getint", side_effect=mock_config_getint)
def test_rpc_ratelimit(getint: mock.MagicMock, client: TestClient,
                       pipeline: Pipeline, packages: List[Package]):
    params = {"v": 5, "type": "suggest-pkgbase", "arg": "big"}

    for i in range(4):
        # The first 4 requests should be good.
        with client as request:
            response = request.get("/rpc", params=params)
        assert response.status_code == int(HTTPStatus.OK)

    # The fifth request should be banned.
    with client as request:
        response = request.get("/rpc", params=params)
    assert response.status_code == int(HTTPStatus.TOO_MANY_REQUESTS)

    # Delete the cached records.
    pipeline.delete("ratelimit-ws:testclient")
    pipeline.delete("ratelimit:testclient")
    one, two = pipeline.execute()
    assert one and two

    # The new first request should be good.
    with client as request:
        response = request.get("/rpc", params=params)
    assert response.status_code == int(HTTPStatus.OK)


def test_rpc_etag(client: TestClient, packages: List[Package]):
    params = {"v": 5, "type": "suggest-pkgbase", "arg": "big"}

    with client as request:
        response1 = request.get("/rpc", params=params)
    with client as request:
        response2 = request.get("/rpc", params=params)

    assert response1.headers.get("ETag") is not None
    assert response1.headers.get("ETag") != str()
    assert response1.headers.get("ETag") == response2.headers.get("ETag")


def test_rpc_search_arg_too_small(client: TestClient):
    params = {"v": 5, "type": "search", "arg": "b"}
    with client as request:
        response = request.get("/rpc", params=params)
    assert response.status_code == int(HTTPStatus.OK)
    assert response.json().get("error") == "Query arg too small."


def test_rpc_search(client: TestClient, packages: List[Package]):
    params = {"v": 5, "type": "search", "arg": "big"}
    with client as request:
        response = request.get("/rpc", params=params)
    assert response.status_code == int(HTTPStatus.OK)

    data = response.json()
    assert data.get("resultcount") == 1

    result = data.get("results")[0]
    assert result.get("Name") == packages[0].Name

    # Test the If-None-Match headers.
    etag = response.headers.get("ETag").strip('"')
    headers = {"If-None-Match": etag}
    response = request.get("/rpc", params=params, headers=headers)
    assert response.status_code == int(HTTPStatus.NOT_MODIFIED)
    assert response.content == b''

    # No args on non-m by types return an error.
    del params["arg"]
    with client as request:
        response = request.get("/rpc", params=params)
    assert response.json().get("error") == "No request type/data specified."


def test_rpc_msearch(client: TestClient, user: User, packages: List[Package]):
    params = {"v": 5, "type": "msearch", "arg": user.Username}
    with client as request:
        response = request.get("/rpc", params=params)
    data = response.json()

    # user1 maintains 4 packages; assert that we got them all.
    assert data.get("resultcount") == 4
    names = list(sorted(r.get("Name") for r in data.get("results")))
    expected_results = [
        "big-chungus",
        "chungy-chungus",
        "gluggly-chungus",
        "other-pkg"
    ]
    assert names == expected_results

    # Search for a non-existent maintainer, giving us zero packages.
    params["arg"] = "blah-blah"
    response = request.get("/rpc", params=params)
    data = response.json()
    assert data.get("resultcount") == 0

    with db.begin():
        packages[0].PackageBase.Maintainer = None

    # A missing arg still succeeds, but it returns all orphans.
    # Just verify that we receive no error and the orphaned result.
    params.pop("arg")
    response = request.get("/rpc", params=params)
    data = response.json()
    assert data.get("resultcount") == 1
    result = data.get("results")[0]
    assert result.get("Name") == "big-chungus"


def test_rpc_search_depends(client: TestClient, packages: List[Package],
                            depends: List[PackageDependency]):
    params = {
        "v": 5, "type": "search", "by": "depends", "arg": "chungus-depends"
    }
    with client as request:
        response = request.get("/rpc", params=params)
    data = response.json()
    assert data.get("resultcount") == 1
    result = data.get("results")[0]
    assert result.get("Name") == packages[0].Name


def test_rpc_search_makedepends(client: TestClient, packages: List[Package],
                                depends: List[PackageDependency]):
    params = {
        "v": 5,
        "type": "search",
        "by": "makedepends",
        "arg": "chungus-makedepends"
    }
    with client as request:
        response = request.get("/rpc", params=params)
    data = response.json()
    assert data.get("resultcount") == 1
    result = data.get("results")[0]
    assert result.get("Name") == packages[0].Name


def test_rpc_search_optdepends(client: TestClient, packages: List[Package],
                               depends: List[PackageDependency]):
    params = {
        "v": 5,
        "type": "search",
        "by": "optdepends",
        "arg": "chungus-optdepends"
    }
    with client as request:
        response = request.get("/rpc", params=params)
    data = response.json()
    assert data.get("resultcount") == 1
    result = data.get("results")[0]
    assert result.get("Name") == packages[0].Name


def test_rpc_search_checkdepends(client: TestClient, packages: List[Package],
                                 depends: List[PackageDependency]):
    params = {
        "v": 5,
        "type": "search",
        "by": "checkdepends",
        "arg": "chungus-checkdepends"
    }
    with client as request:
        response = request.get("/rpc", params=params)
    data = response.json()
    assert data.get("resultcount") == 1
    result = data.get("results")[0]
    assert result.get("Name") == packages[0].Name


def test_rpc_incorrect_by(client: TestClient):
    params = {"v": 5, "type": "search", "by": "fake", "arg": "big"}
    with client as request:
        response = request.get("/rpc", params=params)
    assert response.json().get("error") == "Incorrect by field specified."


def test_rpc_jsonp_callback(client: TestClient):
    """ Test the callback parameter.

    For end-to-end verification, the `examples/jsonp.html` file can be
    used to submit jsonp callback requests to the RPC.
    """
    params = {
        "v": 5,
        "type": "search",
        "arg": "big",
        "callback": "jsonCallback"
    }
    with client as request:
        response = request.get("/rpc", params=params)
    assert response.headers.get("content-type") == "text/javascript"
    assert re.search(r'^/\*\*/jsonCallback\(.*\)$', response.text) is not None

    # Test an invalid callback name; we get an application/json error.
    params["callback"] = "jsonCallback!"
    with client as request:
        response = request.get("/rpc", params=params)
    assert response.headers.get("content-type") == "application/json"
    assert response.json().get("error") == "Invalid callback name."