import psycopg2
from sshtunnel import SSHTunnelForwarder


class DbQuery:
    ssh_address = None
    ssh_key = None
    ssh_user = None
    ssh_password = None

    def __init__(self):
        print("OHA")


def connect_db():
    try:
        with SSHTunnelForwarder(
                ('ssh-address', 22),
                ssh_private_key="/path/to/private/key",
                ### in my case, I used a password instead of a private key
                ssh_username="ssh-user",
                ssh_password="ssh-pasword",
                remote_bind_address=('localhost', 5432)) as server:

            server.start()
            print("server connected")

            params = {
                'database': 'database-name',
                'user': 'database-user',
                'password': 'database-password',
                'host': 'localhost',
                'port': server.local_bind_port
            }

            conn = psycopg2.connect(**params)
            curs = conn.cursor()

            print("database connected")

            sql = "select concat(that.username,'@',that.host ) as blocker, " \
                  "this.username as blockee, " \
                  "to_date(to_char(b.\"createdAt\", 'YYYY/MM/DD'), 'YYYY/MM/DD') as block_date " \
                  "from blocking b " \
                  "join \"user\" this on this.id = b.\"blockeeId\" " \
                  "join \"user\" that on that.id = b.\"blockerId\" " \
                  "where this.username = '<user-to-check>' " \
                  "and this.host is null;"

            print(sql)
            curs.execute(sql)
            rows = curs.fetchall()
            print(rows)

            curs.close()
            conn.close()

    except Exception as e:
        print("Connection Failed: ", e)


def another_db_conn(user):
    print("OTHER!")
    try:
        print("TRY!")
        server = SSHTunnelForwarder(
            ('ssh-address', 22),
            ssh_private_key="/path/to/private/key",
            ssh_username="ssh-user",
            ssh_password="ssh-pasword",
            remote_bind_address=('localhost', 5432)
        )

        print("start server...")
        server.start()

        print("other shit...")
        params = {
            'database': 'database-name',
            'user': 'database-user',
            'password': 'database-password',
            'host': 'localhost',
            'port': server.local_bind_port
        }

        print("start connection...")
        conn = psycopg2.connect(**params)

        print("open cursor...")
        curs = conn.cursor()

        print("database connected...")
        sql = "select concat(that.username,'@',that.host ) as blocker, " \
              "this.username as blockee, " \
              "to_date(to_char(b.\"createdAt\", 'YYYY/MM/DD'), 'YYYY/MM/DD') as block_date " \
              "from blocking b " \
              "join \"user\" this on this.id = b.\"blockeeId\" " \
              "join \"user\" that on that.id = b.\"blockerId\" " \
              "where this.username = '{0}' " \
              "and this.host is null;".format(user)

        print("executing sql statement...")
        curs.execute(sql)

        print("fetching results...")
        rows = curs.fetchall()

        print(rows)

        curs.close()
        conn.close()

        server.stop()
    except Exception as e:
        print("AAAA", e)


def init_db_conn():
    print("init db conn!")


def start_ssh_tunnel():
    print("start ssh tunnel!")


def load_user_config():
    print("user config!")


def main():
    print("Hello world!")
    another_db_conn("captain_arepa")


# Run main function
if __name__ == "__main__":
    main()