# Copyright 2020 Efabless Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import json
import argparse
import os

parser = argparse.ArgumentParser(
    description="top module generation helper to show the optional fields of a given pad"
)

parser.add_argument(
    "--padType",
    "-t",
    action="store",
    required=False,
    help="The pad type to show the mapping for",
)

parser.add_argument(
    "--showPadTypes",
    "-s",
    action="store_true",
    default=False,
    help="A flag to list all the available pad types in a given library.",
)

parser.add_argument(
    "--padsLibs",
    "-p",
    action="store",
    required=True,
    help="The pad libraries json description",
)

parser.add_argument(
    "--padsLibName",
    "-n",
    action="store",
    required=True,
    help="The name of the pad library to use from the given padsLibs",
)


args = parser.parse_args()
padType = args.padType
padsLibs = args.padsLibs
showPadTypes = args.showPadTypes
padsLibName = args.padsLibName


if padType is None and not showPadTypes:
    print(
        "Please either specify a pad type to show the mapping for, or use the showPadTypes flag to list all possible types in the library"
    )
else:
    # description of the libraries parsed into a dict
    if not os.path.exists(padsLibs):
        raise IOError("file not found: " + padsLibs)
    padsLibsJSONOpener = open(padsLibs, "r")
    padsLibs_json = json.load(padsLibsJSONOpener)
    padsLibsJSONOpener.close()

    # Finding the used pads library
    padsLib_json = dict()
    for padsLib in padsLibs_json:
        if padsLib["library_name"] == padsLibName:
            padsLib_json = padsLib
            break

    if len(padsLib_json) == 0:
        raise Exception("Used Pad Lib is not found in the given Pad Libraries JSON")

    if showPadTypes:
        for pad in padsLib_json["pads"]:
            if "mapping" in pad:
                print(pad["type"])
    if padType is not None:
        for pad in padsLib_json["pads"]:
            if padType == pad["type"]:
                print("print mapping for pad", padType)
                print("key : mapped_to")
                for mapping in pad["mapping"].keys():
                    print(mapping, " : ", pad["mapping"][mapping])
                break