# -*- coding: utf-8 -*-
# Copyright (c) Alibaba, Inc. and its affiliates.

import os

import torch.nn as nn
from scepter.modules.utils.config import dict_to_yaml


class Visualize3DModule(nn.Module):
    para_dict = {
        'VISUALIZE': {
            'value': False,
            'description': 'visualize the layer output or not!'
        },
        'VISUALIZE_OUTPUT_DIR': {
            'value': '',
            'description': 'the visualize output saved dir!'
        },
    }

    def __init__(self, cfg, logger=None):
        super(Visualize3DModule, self).__init__()
        # visualize=False, visualize_output_dir=""
        self.logger = logger
        self.visualize = cfg.get('VISUALIZE', False)
        self.visualize_output_dir = cfg.get('VISUALIZE_OUTPUT_DIR', '')
        self.id = 0

    def visualize_features(self, module, input_x, output_x):
        """
        Visualizes and saves the normalized output features for the module.
        """
        import matplotlib.pyplot as plt
        if not self.visualize:
            return
        b, c, t, h, w = output_x.shape
        xmin, xmax = output_x.min(1).values.unsqueeze(1), output_x.max(
            1).values.unsqueeze(1)
        x_vis = ((output_x.detach() - xmin) / (xmax - xmin)).permute(0, 1, 3, 2, 4) \
            .reshape(b, c * h, t * w).detach().cpu().numpy()
        if hasattr(self, 'stage_id'):
            stage_id = self.stage_id
            block_id = self.block_id
        else:
            stage_id = 0
            block_id = 0
        for i in range(b):
            if not os.path.exists(
                    f'{self.visualize_output_dir}/im_{self.id + i}/'):
                os.makedirs(f'{self.visualize_output_dir}/im_{self.id + i}/')
            plt.imsave(
                f'{self.base_output_dir}/'
                f'im_{self.id + i}/layer_{stage_id}_{block_id}_feature.jpg',
                x_vis[i])
        self.id += b

    def set_stage_block_id(self, stage_id, block_id):
        setattr(self, 'stage_id', stage_id)
        setattr(self, 'block_id', block_id)

    @staticmethod
    def get_config_template():
        '''
        { "ENV" :
            { "description" : "",
              "A" : {
                    "value": 1.0,
                    "description": ""
               }
            }
        }
        :return:
        '''
        return dict_to_yaml('BRANCH',
                            __class__.__name__,
                            Visualize3DModule.para_dict,
                            set_name=True)