from decouple import config

from chalicelib.core import authorizers, users
from chalicelib.utils import helper
from chalicelib.utils import pg_client

AUDIENCE = "spot:OpenReplay"


def change_spot_jwt_iat_jti(user_id):
    with pg_client.PostgresClient() as cur:
        query = cur.mogrify(f"""UPDATE public.users
                                SET spot_jwt_iat = timezone('utc'::text, now()-INTERVAL '10s'),
                                    spot_jwt_refresh_jti = 0, 
                                    spot_jwt_refresh_iat = timezone('utc'::text, now()-INTERVAL '10s') 
                                WHERE user_id = %(user_id)s 
                                RETURNING EXTRACT (epoch FROM spot_jwt_iat)::BIGINT AS spot_jwt_iat, 
                                          spot_jwt_refresh_jti, 
                                          EXTRACT (epoch FROM spot_jwt_refresh_iat)::BIGINT AS spot_jwt_refresh_iat;""",
                            {"user_id": user_id})
        cur.execute(query)
        row = cur.fetchone()
        return row.get("spot_jwt_iat"), row.get("spot_jwt_refresh_jti"), row.get("spot_jwt_refresh_iat")


def refresh_spot_jwt_iat_jti(user_id):
    with pg_client.PostgresClient() as cur:
        query = cur.mogrify(f"""UPDATE public.users
                                SET spot_jwt_iat = timezone('utc'::text, now()-INTERVAL '10s'),
                                    spot_jwt_refresh_jti = spot_jwt_refresh_jti + 1 
                                WHERE user_id = %(user_id)s 
                                RETURNING EXTRACT (epoch FROM spot_jwt_iat)::BIGINT AS spot_jwt_iat, 
                                          spot_jwt_refresh_jti, 
                                          EXTRACT(epoch FROM spot_jwt_refresh_iat)::BIGINT AS spot_jwt_refresh_iat;""",
                            {"user_id": user_id})
        cur.execute(query)
        row = cur.fetchone()
        return row.get("spot_jwt_iat"), row.get("spot_jwt_refresh_jti"), row.get("spot_jwt_refresh_iat")


def authenticate(email, password) -> dict | None:
    with pg_client.PostgresClient() as cur:
        query = cur.mogrify(
            f"""SELECT 
                    users.user_id,
                    1 AS tenant_id,
                    users.name,
                    users.email
                FROM public.users INNER JOIN public.basic_authentication USING(user_id)
                WHERE users.email = %(email)s 
                    AND basic_authentication.password = crypt(%(password)s, basic_authentication.password)
                    AND basic_authentication.user_id = (SELECT su.user_id FROM public.users AS su WHERE su.email=%(email)s AND su.deleted_at IS NULL LIMIT 1)
                LIMIT 1;""",
            {"email": email, "password": password})

        cur.execute(query)
        r = cur.fetchone()

    if r is not None:
        r = helper.dict_to_camel_case(r)
        spot_jwt_iat, spot_jwt_r_jti, spot_jwt_r_iat = change_spot_jwt_iat_jti(user_id=r['userId'])
        return {
            "jwt": authorizers.generate_jwt(user_id=r['userId'], tenant_id=r['tenantId'], iat=spot_jwt_iat,
                                            aud=AUDIENCE),
            "refreshToken": authorizers.generate_jwt_refresh(user_id=r['userId'], tenant_id=r['tenantId'],
                                                             iat=spot_jwt_r_iat, aud=AUDIENCE,
                                                             jwt_jti=spot_jwt_r_jti),
            "refreshTokenMaxAge": config("JWT_REFRESH_EXPIRATION", cast=int),
            "email": email,
            **r
        }
    return None


def logout(user_id: int):
    users.logout(user_id=user_id)


def refresh(user_id: int, tenant_id: int = -1) -> dict:
    spot_jwt_iat, spot_jwt_r_jti, spot_jwt_r_iat = refresh_spot_jwt_iat_jti(user_id=user_id)
    return {
        "jwt": authorizers.generate_jwt(user_id=user_id, tenant_id=tenant_id, iat=spot_jwt_iat,
                                        aud=AUDIENCE),
        "refreshToken": authorizers.generate_jwt_refresh(user_id=user_id, tenant_id=tenant_id, iat=spot_jwt_r_iat,
                                                         aud=AUDIENCE, jwt_jti=spot_jwt_r_jti),
        "refreshTokenMaxAge": config("JWT_REFRESH_EXPIRATION", cast=int) - (spot_jwt_iat - spot_jwt_r_iat)
    }


def refresh_auth_exists(user_id, jwt_jti=None):
    with pg_client.PostgresClient() as cur:
        cur.execute(
            cur.mogrify(f"""SELECT user_id 
                            FROM public.users  
                            WHERE user_id = %(userId)s 
                                AND deleted_at IS NULL
                                AND spot_jwt_refresh_jti = %(jwt_jti)s
                            LIMIT 1;""",
                        {"userId": user_id, "jwt_jti": jwt_jti})
        )
        r = cur.fetchone()
    return r is not None