"""
    Refer to https://github.com/rosinality/stylegan2-pytorch/blob/master/lpips/base_model.py
    Refer to https://github.com/richzhang/PerceptualSimilarity/blob/master/lpips/trainer.py
"""
import os
import torch
from torch.autograd import Variable
from pdb import set_trace as st
from IPython import embed


class BaseModel:
    def __init__(self):
        pass

    def name(self):
        return "BaseModel"

    def initialize(self, use_gpu=True, gpu_ids=[0]):
        self.use_gpu = use_gpu
        self.gpu_ids = gpu_ids

    def forward(self):
        pass

    def get_image_paths(self):
        pass

    def optimize_parameters(self):
        pass

    def get_current_visuals(self):
        return self.input

    def get_current_errors(self):
        return {}

    def save(self, label):
        pass

    # helper saving function that can be used by subclasses
    def save_network(self, network, path, network_label, epoch_label):
        save_filename = "%s_net_%s.pth" % (epoch_label, network_label)
        save_path = os.path.join(path, save_filename)
        torch.save(network.state_dict(), save_path)

    # helper loading function that can be used by subclasses
    def load_network(self, network, network_label, epoch_label):
        save_filename = "%s_net_%s.pth" % (epoch_label, network_label)
        save_path = os.path.join(self.save_dir, save_filename)
        print("Loading network from %s" % save_path)
        network.load_state_dict(torch.load(save_path))

    def update_learning_rate():
        pass

    def get_image_paths(self):
        return self.image_paths

    def save_done(self, flag=False):
        np.save(os.path.join(self.save_dir, "done_flag"), flag)
        np.savetxt(
            os.path.join(self.save_dir, "done_flag"),
            [
                flag,
            ],
            fmt="%i",
        )