# functions about connections to other instances
# -------------------------------------------------------------------
"""

"""
import basic.program
import utils.config_tool
import basic.constants as B
import utils.data_const as D


def getConnection(comp, nr):
    job = basic.program.Job.getInstance()
    verify = job.getDebugLevel("conn_tool")
    conn = {}
    if job.conf.confs.get("tools").get("connsrc") == D.DFILE_TYPE_YML:
        conn = utils.config_tool.getConfig("tool", B.SUBJECT_CONN)
        xtypes = None
        if ("types" in conn["env"][comp]):
            xtypes = conn["env"][comp]["types"]
        instnr = "inst" + str(nr)
        if conn["env"][comp][instnr]:
            if (xtypes is not None):
                conn["env"][comp][instnr]["types"] = xtypes
            return conn["env"][comp][instnr]
        else:
            job.m.setFatal("Conn-Tool: Comp not configured " + comp + " " + str(nr))
    elif job.conf.confs.get("tools").get("connsrc") == "flaskdb":
        pass
    elif job.conf.confs.get("tools").get("connsrc") == D.DFILE_TYPE_CSV:
        pass
    return None


def getConnections(comp):
    """
    it reads the connection-attributes for each instances of this component
    general attributes are added to the connection-attributes
    :param comp:
    :return:
    """
    job = basic.program.Job.getInstance()
    verify = job.getDebugLevel("conn_tool")
    msg = None
    if hasattr(comp, "m") and comp.m is not None:
        msg = comp.m
    elif hasattr(job, "m") and job.m is not None:
        msg = job.m
    else:
        raise Exception("message-object is missing")
    msg.debug(verify, "getConnections " + comp)
    conn = {}
    conns = []
    if job.conf.confs.get("tools").get("connsrc") in [D.DFILE_TYPE_YML, D.DFILE_TYPE_JSON, D.DFILE_TYPE_CSV]:
        conn = utils.config_tool.getConfig("tool", B.SUBJECT_CONN)
        if not comp in conn["env"]:
            job.m.setFatal("Conn-Tool: Comp not configured " + comp)
    elif job.conf.confs.get("tools").get("connsrc") == "flaskdb":
        pass

    attr = {}
    if "general" in conn["env"]:
        for a in conn["env"]["general"]:
            attr[a] = conn["env"]["general"]
    for a in conn["env"][comp]:
        if "inst" in a and a != B.SUBJECT_INST:
            continue
        attr[a] = conn["env"][comp][a]
    #if ("types" in conn["env"][comp]):
    #    xtypes = conn["env"][comp]["types"]
    for i in range(conn["env"][comp][B.SUBJECT_INST][B.ATTR_INST_CNT]):
        print("range " + str(i + 1))
        instnr = "inst" + str(i + 1)
        #if (xtypes is not None):
        #    conn["env"][comp][instnr]["types"] = xtypes
        for a in attr:
            if a in conn["env"][comp][instnr]:
                continue # dont overwrite an instance-specific value
            conn["env"][comp][instnr][a] = attr[a]
        conns.append(conn["env"][comp][instnr])

    return conns