# MIT License
#
# Copyright (c) 2019 Xilinx
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# SOFTWARE.

import os
from configparser import ConfigParser

import torch
from torch import hub

from .CNV import cnv

model_impl = {
    'CNV': cnv
}

def get_model_cfg(name):
    cfg = ConfigParser()
    current_dir = os.path.dirname(os.path.abspath(__file__))
    config_path = os.path.join(current_dir, '..', 'cfg', name.lower() + '.ini')
    assert os.path.exists(config_path)
    cfg.read(config_path)
    return cfg

def model_with_cfg(name, pretrained):
    cfg = get_model_cfg(name)
    arch = cfg.get('MODEL', 'ARCH')
    model = model_impl[arch](cfg)
    if pretrained:
        checkpoint = cfg.get('MODEL', 'PRETRAINED_URL')
        state_dict = hub.load_state_dict_from_url(checkpoint, progress=True, map_location='cpu')
        model.load_state_dict(state_dict, strict=True)
    return model, cfg
