from . import coerce_methods as coerce_methods
from collections import OrderedDict


DEBUG = False

def mapper(mapping, data):
    """
    MDG - 27/01/2021
    This method handles the mapping declared within the endpoint.
    For each parameter, it applies the coerce method (if present) or simply renames the parameter key.
    Usage example:
        Declare within the endpoint a Dict similar to this:

        mapping = {
            "cards_mapping": {
                "firstname": ("fn", coerce_methods.coerce_fn_to_microsip_firstname, None),
                "lastname": ("fn", coerce_methods.coerce_fn_to_microsip_lastname, None),
                "phone": ("tel", coerce_methods.clean_phone_number_from_symbols, None),
                "address": ("adr", coerce_methods.coerce_adr_to_microsip_address, None),
                "city": ("adr", coerce_methods.coerce_adr_to_microsip_city, None),
                "state": ("adr", coerce_methods.coerce_adr_to_microsip_state, None),
                "zip": ("adr", coerce_methods.coerce_adr_to_microsip_zip, None),
                "email": ("email", None, None)
                #("categories": "", None),
            },
            "base_mapping": {
                "items": ("cards", None, "cards_mapping"),
            }
        }

        The "base_mapping" is the first level mapping.
        In -> "items": ("cards", None, "cards_mapping"),
            - "items" is the parameter name in which the parameter to handle will be renamed
            - "cards" is the parameter name to handle (that comes from logics)
            - "None" is the coerce method to eventually apply
            - "cards_mapping" is the sub level mapping (the mapping of the single objects within the cards array)
        The mapping can be recursive (infinite level of sub mapping)

        IMPORTANT: the base level mapping has to be named "base_mapping". The sub level mappings have to be named with the dict key used for that mapping.
    """
    currentMapping = mapping
    if isinstance(data, list):
        responseData = []
        if DEBUG: print("[DEBUG] Data input in mapping:")
        if DEBUG: print(data)
        for item in data:
            responseItem = OrderedDict()
            for key, value in currentMapping.items():
                responseParameter = key
                majornetParameter, coerceMethod, subMapping = value
                if majornetParameter in item:
                    if DEBUG: print("[DEBUG] Handling majornetParameter: ")
                    if DEBUG: print(majornetParameter)
                    if subMapping:
                        mapper(subMapping, mapping_item[majornetParameter])
                    if coerceMethod:
                        responseItem[responseParameter] = coerceMethod(item[majornetParameter])
                    else:
                        responseItem[responseParameter] = item[majornetParameter]
                    if DEBUG: print("[DEBUG] Mapping to responseParameter: ")
                    if DEBUG: print(responseParameter)
                    if DEBUG: print("[DEBUG] Result item: ")
                    if DEBUG: print(responseItem)
                    if DEBUG: print("\n")
            responseData.append(responseItem)
        if DEBUG: print("\n\n\n[DEBUG] Result response data in list:")
        if DEBUG: print(responseData)
    else:
        responseData = OrderedDict()
        if 'base_mapping' in mapping:
            currentMapping = mapping['base_mapping']
        for key, value in currentMapping.items():
            responseParameter = key
            majornetParameter, coerceMethod, subMapping = value
            if majornetParameter in data:
                if subMapping:
                    responseData[responseParameter] = mapper(mapping[subMapping], data[majornetParameter])
                else:
                    responseData[responseParameter] = data[majornetParameter]
                if coerceMethod:
                    responseData[responseParameter] = coerceMethod(data[responseParameter])
    if DEBUG: print("[DEBUG] Result response data returning from mapping:")
    if DEBUG: print(responseData)
    return responseData