import datetime
import uuid

from authlib.oauth2.rfc6749 import AuthorizationCodeMixin
from authlib.oauth2.rfc6749 import ClientMixin
from authlib.oauth2.rfc6749 import TokenMixin
from authlib.oauth2.rfc6749 import util
from canaille.ldap_backend.ldapobject import LDAPObject


class Client(LDAPObject, ClientMixin):
    object_class = ["oauthClient"]
    base = "ou=clients,ou=oauth"
    id = "oauthClientID"
    attribute_table = {
        "description": "description",
        "client_id": "oauthClientID",
        "name": "oauthClientName",
        "contact": "oauthClientContact",
        "uri": "oauthClientURI",
        "redirect_uris": "oauthRedirectURIs",
        "post_logout_redirect_uris": "oauthPostLogoutRedirectURI",
        "logo_uri": "oauthLogoURI",
        "issue_date": "oauthIssueDate",
        "secret": "oauthClientSecret",
        "secret_expires_date": "oauthClientSecretExpDate",
        "grant_type": "oauthGrantType",
        "response_type": "oauthResponseType",
        "scope": "oauthScope",
        "tos_uri": "oauthTermsOfServiceURI",
        "policy_uri": "oauthPolicyURI",
        "jwk_uri": "oauthJWKURI",
        "jwk": "oauthJWK",
        "token_endpoint_auth_method": "oauthTokenEndpointAuthMethod",
        "software_id": "oauthSoftwareID",
        "software_version": "oauthSoftwareVersion",
        "audience": "oauthAudience",
        "preconsent": "oauthPreconsent",
    }

    def get_default_redirect_uri(self):
        return self.redirect_uris[0]

    def get_allowed_scope(self, scope):
        return util.list_to_scope(self.scope)

    def check_redirect_uri(self, redirect_uri):
        return redirect_uri in self.redirect_uris

    def has_client_secret(self):
        return bool(self.secret)

    def check_client_secret(self, client_secret):
        return client_secret == self.secret

    def check_endpoint_auth_method(self, method, endpoint):
        if endpoint == "token":
            return method == self.token_endpoint_auth_method
        return True

    def check_response_type(self, response_type):
        return all(r in self.response_type for r in response_type.split(" "))

    def check_grant_type(self, grant_type):
        return grant_type in self.grant_type

    @property
    def client_info(self):
        return dict(
            client_id=self.client_id,
            client_secret=self.client_secret,
            client_id_issued_at=self.client_id_issued_at,
            client_secret_expires_at=self.client_secret_expires_date,
        )


class AuthorizationCode(LDAPObject, AuthorizationCodeMixin):
    object_class = ["oauthAuthorizationCode"]
    base = "ou=authorizations,ou=oauth"
    id = "oauthAuthorizationCodeID"
    attribute_table = {
        "authorization_code_id": "oauthAuthorizationCodeID",
        "description": "description",
        "code": "oauthCode",
        "client": "oauthClient",
        "subject": "oauthSubject",
        "redirect_uri": "oauthRedirectURI",
        "response_type": "oauthResponseType",
        "scope": "oauthScope",
        "nonce": "oauthNonce",
        "issue_date": "oauthAuthorizationDate",
        "lifetime": "oauthAuthorizationLifetime",
        "challenge": "oauthCodeChallenge",
        "challenge_method": "oauthCodeChallengeMethod",
        "revokation_date": "oauthRevokationDate",
    }

    def get_redirect_uri(self):
        return self.redirect_uri

    def get_scope(self):
        return self.scope

    def get_nonce(self):
        return self.nonce

    def is_expired(self):
        return (
            self.issue_date + datetime.timedelta(seconds=int(self.lifetime))
            < datetime.datetime.now()
        )

    def get_auth_time(self):
        return int((self.issue_date - datetime.datetime(1970, 1, 1)).total_seconds())


class Token(LDAPObject, TokenMixin):
    object_class = ["oauthToken"]
    base = "ou=tokens,ou=oauth"
    id = "oauthTokenID"
    attribute_table = {
        "token_id": "oauthTokenID",
        "access_token": "oauthAccessToken",
        "description": "description",
        "client": "oauthClient",
        "subject": "oauthSubject",
        "type": "oauthTokenType",
        "refresh_token": "oauthRefreshToken",
        "scope": "oauthScope",
        "issue_date": "oauthIssueDate",
        "lifetime": "oauthTokenLifetime",
        "revokation_date": "oauthRevokationDate",
        "audience": "oauthAudience",
    }

    @property
    def expire_date(self):
        return self.issue_date + datetime.timedelta(seconds=int(self.lifetime))

    @property
    def revoked(self):
        return bool(self.revokation_date)

    def get_scope(self):
        return " ".join(self.scope)

    def get_expires_in(self):
        return int(self.lifetime)

    def get_issued_at(self):
        return int((self.issue_date - datetime.datetime(1970, 1, 1)).total_seconds())

    def get_expires_at(self):
        issue_timestamp = (
            self.issue_date - datetime.datetime(1970, 1, 1)
        ).total_seconds()
        return int(issue_timestamp) + int(self.lifetime)

    def is_refresh_token_active(self):
        if self.revokation_date:
            return False

        return self.expire_date >= datetime.datetime.now()

    def is_expired(self):
        return (
            self.issue_date + datetime.timedelta(seconds=int(self.lifetime))
            < datetime.datetime.now()
        )

    def is_revoked(self):
        return bool(self.revokation_date)

    def check_client(self, client):
        return client.client_id == Client.get(self.client).client_id


class Consent(LDAPObject):
    object_class = ["oauthConsent"]
    base = "ou=consents,ou=oauth"
    id = "cn"
    attribute_table = {
        "cn": "cn",
        "subject": "oauthSubject",
        "client": "oauthClient",
        "scope": "oauthScope",
        "issue_date": "oauthIssueDate",
        "revokation_date": "oauthRevokationDate",
    }

    def __init__(self, *args, **kwargs):
        if "cn" not in kwargs:
            kwargs["cn"] = str(uuid.uuid4())

        super().__init__(*args, **kwargs)

    def revoke(self):
        self.revokation_date = datetime.datetime.now()
        self.save()

        tokens = Token.filter(
            oauthClient=self.client,
            oauthSubject=self.subject,
        )
        for t in tokens:
            if t.revoked or any(scope not in t.scope[0] for scope in self.scope):
                continue

            t.revokation_date = self.revokation_date
            t.save()