import os
from datetime import datetime
from unittest import SkipTest, mock
from uuid import UUID

import boto3
import pytest
from botocore.exceptions import ClientError

from moto import mock_cognitoidentity, settings
from moto.cognitoidentity.utils import get_random_identity_id
from moto.core import DEFAULT_ACCOUNT_ID as ACCOUNT_ID


@mock_cognitoidentity
@pytest.mark.parametrize("name", ["pool#name", "with!excl", "with?quest"])
def test_create_identity_pool_invalid_name(name):
    conn = boto3.client("cognito-identity", "us-west-2")

    with pytest.raises(ClientError) as exc:
        conn.create_identity_pool(
            IdentityPoolName=name, AllowUnauthenticatedIdentities=False
        )
    err = exc.value.response["Error"]
    assert err["Code"] == "ValidationException"
    assert (
        err["Message"]
        == f"1 validation error detected: Value '{name}' at 'identityPoolName' failed to satisfy constraint: Member must satisfy regular expression pattern: [\\w\\s+=,.@-]+"
    )


@mock_cognitoidentity
@pytest.mark.parametrize("name", ["x", "pool-", "pool_name", "with space"])
def test_create_identity_pool_valid_name(name):
    conn = boto3.client("cognito-identity", "us-west-2")

    conn.create_identity_pool(
        IdentityPoolName=name, AllowUnauthenticatedIdentities=False
    )


@mock_cognitoidentity
def test_create_identity_pool():
    conn = boto3.client("cognito-identity", "us-west-2")

    result = conn.create_identity_pool(
        IdentityPoolName="TestPool",
        AllowUnauthenticatedIdentities=False,
        SupportedLoginProviders={"graph.facebook.com": "123456789012345"},
        DeveloperProviderName="devname",
        OpenIdConnectProviderARNs=[f"arn:aws:rds:eu-west-2:{ACCOUNT_ID}:db:mysql-db"],
        CognitoIdentityProviders=[
            {
                "ProviderName": "testprovider",
                "ClientId": "CLIENT12345",
                "ServerSideTokenCheck": True,
            }
        ],
        SamlProviderARNs=[f"arn:aws:rds:eu-west-2:{ACCOUNT_ID}:db:mysql-db"],
    )
    assert result["IdentityPoolId"] != ""


@mock_cognitoidentity
def test_describe_identity_pool():
    conn = boto3.client("cognito-identity", "us-west-2")

    res = conn.create_identity_pool(
        IdentityPoolName="TestPool",
        AllowUnauthenticatedIdentities=False,
        SupportedLoginProviders={"graph.facebook.com": "123456789012345"},
        DeveloperProviderName="devname",
        OpenIdConnectProviderARNs=[f"arn:aws:rds:eu-west-2:{ACCOUNT_ID}:db:mysql-db"],
        CognitoIdentityProviders=[
            {
                "ProviderName": "testprovider",
                "ClientId": "CLIENT12345",
                "ServerSideTokenCheck": True,
            }
        ],
        SamlProviderARNs=[f"arn:aws:rds:eu-west-2:{ACCOUNT_ID}:db:mysql-db"],
    )

    result = conn.describe_identity_pool(IdentityPoolId=res["IdentityPoolId"])

    assert result["IdentityPoolId"] == res["IdentityPoolId"]
    assert (
        result["AllowUnauthenticatedIdentities"]
        == res["AllowUnauthenticatedIdentities"]
    )
    assert result["SupportedLoginProviders"] == res["SupportedLoginProviders"]
    assert result["DeveloperProviderName"] == res["DeveloperProviderName"]
    assert result["OpenIdConnectProviderARNs"] == res["OpenIdConnectProviderARNs"]
    assert result["CognitoIdentityProviders"] == res["CognitoIdentityProviders"]
    assert result["SamlProviderARNs"] == res["SamlProviderARNs"]


@pytest.mark.parametrize(
    "key,initial_value,updated_value",
    [
        (
            "SupportedLoginProviders",
            {"graph.facebook.com": "123456789012345"},
            {"graph.facebook.com": "123456789012345", "graph.google.com": "00000000"},
        ),
        ("SupportedLoginProviders", {"graph.facebook.com": "123456789012345"}, {}),
        ("DeveloperProviderName", "dev1", "dev2"),
    ],
)
@mock_cognitoidentity
def test_update_identity_pool(key, initial_value, updated_value):
    conn = boto3.client("cognito-identity", "us-west-2")

    res = conn.create_identity_pool(
        IdentityPoolName="TestPool",
        AllowUnauthenticatedIdentities=False,
        **dict({key: initial_value}),
    )

    first = conn.describe_identity_pool(IdentityPoolId=res["IdentityPoolId"])
    assert first[key] == initial_value

    response = conn.update_identity_pool(
        IdentityPoolId=res["IdentityPoolId"],
        IdentityPoolName="TestPool",
        AllowUnauthenticatedIdentities=False,
        **dict({key: updated_value}),
    )
    assert response[key] == updated_value

    second = conn.describe_identity_pool(IdentityPoolId=res["IdentityPoolId"])
    assert second[key] == response[key]


@mock_cognitoidentity
def test_describe_identity_pool_with_invalid_id_raises_error():
    conn = boto3.client("cognito-identity", "us-west-2")
    with pytest.raises(ClientError) as cm:
        conn.describe_identity_pool(IdentityPoolId="us-west-2_non-existent")

    assert cm.value.operation_name == "DescribeIdentityPool"
    assert cm.value.response["Error"]["Code"] == "ResourceNotFoundException"
    assert cm.value.response["Error"]["Message"] == "us-west-2_non-existent"
    assert cm.value.response["ResponseMetadata"]["HTTPStatusCode"] == 400


# testing a helper function
def test_get_random_identity_id():
    identity_id = get_random_identity_id("us-west-2")
    region, identity_id = identity_id.split(":")
    assert region == "us-west-2"
    UUID(identity_id, version=4)  # Will throw an error if it's not a valid UUID


@mock_cognitoidentity
def test_get_id():
    conn = boto3.client("cognito-identity", "us-west-2")
    identity_pool_data = conn.create_identity_pool(
        IdentityPoolName="test_identity_pool", AllowUnauthenticatedIdentities=True
    )
    result = conn.get_id(
        AccountId="someaccount",
        IdentityPoolId=identity_pool_data["IdentityPoolId"],
        Logins={"someurl": "12345"},
    )
    assert result.get("IdentityId").startswith("us-west-2")


@mock_cognitoidentity
@mock.patch.dict(os.environ, {"AWS_DEFAULT_REGION": "any-region"})
@mock.patch.dict(os.environ, {"MOTO_ALLOW_NONEXISTENT_REGION": "trUe"})
def test_get_id__unknown_region():
    if settings.TEST_SERVER_MODE:
        raise SkipTest("Cannot set environemnt variables in ServerMode")
    conn = boto3.client("cognito-identity")
    identity_pool_data = conn.create_identity_pool(
        IdentityPoolName="test_identity_pool", AllowUnauthenticatedIdentities=True
    )
    result = conn.get_id(
        AccountId="someaccount",
        IdentityPoolId=identity_pool_data["IdentityPoolId"],
        Logins={"someurl": "12345"},
    )
    assert result.get("IdentityId").startswith("any-region")


@mock_cognitoidentity
def test_get_credentials_for_identity():
    conn = boto3.client("cognito-identity", "us-west-2")
    result = conn.get_credentials_for_identity(IdentityId="12345")

    assert isinstance(result["Credentials"]["Expiration"], datetime)
    assert result.get("IdentityId") == "12345"


@mock_cognitoidentity
def test_get_open_id_token_for_developer_identity():
    conn = boto3.client("cognito-identity", "us-west-2")
    result = conn.get_open_id_token_for_developer_identity(
        IdentityPoolId="us-west-2:12345",
        IdentityId="12345",
        Logins={"someurl": "12345"},
        TokenDuration=123,
    )
    assert len(result["Token"]) > 0
    assert result["IdentityId"] == "12345"


@mock_cognitoidentity
def test_get_open_id_token_for_developer_identity_when_no_explicit_identity_id():
    conn = boto3.client("cognito-identity", "us-west-2")
    result = conn.get_open_id_token_for_developer_identity(
        IdentityPoolId="us-west-2:12345", Logins={"someurl": "12345"}, TokenDuration=123
    )
    assert len(result["Token"]) > 0
    assert len(result["IdentityId"]) > 0


@mock_cognitoidentity
def test_get_open_id_token():
    conn = boto3.client("cognito-identity", "us-west-2")
    result = conn.get_open_id_token(IdentityId="12345", Logins={"someurl": "12345"})
    assert len(result["Token"]) > 0
    assert result["IdentityId"] == "12345"


@mock_cognitoidentity
def test_list_identities():
    conn = boto3.client("cognito-identity", "us-west-2")
    identity_pool_data = conn.create_identity_pool(
        IdentityPoolName="test_identity_pool", AllowUnauthenticatedIdentities=True
    )
    identity_pool_id = identity_pool_data["IdentityPoolId"]
    identity_data = conn.get_id(
        AccountId="someaccount",
        IdentityPoolId=identity_pool_id,
        Logins={"someurl": "12345"},
    )
    identity_id = identity_data["IdentityId"]
    identities = conn.list_identities(IdentityPoolId=identity_pool_id, MaxResults=123)
    assert "IdentityPoolId" in identities and "Identities" in identities
    assert identity_id in [x["IdentityId"] for x in identities["Identities"]]


@mock_cognitoidentity
def test_list_identity_pools():
    conn = boto3.client("cognito-identity", "us-west-2")
    identity_pool_data = conn.create_identity_pool(
        IdentityPoolName="test_identity_pool", AllowUnauthenticatedIdentities=True
    )
    identity_pool_id = identity_pool_data["IdentityPoolId"]
    identity_data = conn.list_identity_pools(MaxResults=10)
    assert identity_pool_id == identity_data["IdentityPools"][0]["IdentityPoolId"]
    assert "test_identity_pool" == identity_data["IdentityPools"][0]["IdentityPoolName"]