# Copyright (c) 2022, National Diet Library, Japan
#
# This software is released under the CC BY 4.0.
# https://creativecommons.org/licenses/by/4.0/


import copy
import numpy
import os

from .base_proc import BaseInferenceProcess


class PageSeparation(BaseInferenceProcess):
    """
    ノド元分割処理を実行するプロセスのクラス。
    BaseInferenceProcessを継承しています。
    """
    def __init__(self, cfg, pid):
        """
        Parameters
        ----------
        cfg : dict
            本推論処理における設定情報です。
        pid : int
            実行される順序を表す数値。
        """
        super().__init__(cfg, pid, '_page_sep')

        if self.cfg['page_separation']['silence_tf_log']:
            import logging
            import warnings
            os.environ['TF_CPP_MIN_LOG_LEVEL'] = '3'
            warnings.simplefilter(action='ignore', category=FutureWarning)

            import tensorflow as tf
            tf.get_logger().setLevel(logging.ERROR)

        from src.separate_pages_ssd.inference_divided import divide_facing_page_with_cli, load_weightfile
        load_weightfile(os.path.abspath(self.cfg['page_separation']['weight_path']))
        self._run_src_inference = divide_facing_page_with_cli

    def _is_valid_input(self, input_data):
        """
        本クラスの推論処理における入力データのバリデーション。

        Parameters
        ----------
        input_data : dict
            推論処理を実行する対象の入力データ。

        Returns
        -------
        [変数なし] : bool
            　入力データが正しければTrue, そうでなければFalseを返します。
        """
        if type(input_data['img']) is not numpy.ndarray:
            print('PageSeparation: input img is not numpy.ndarray')
            return False
        return True

    def _run_process(self, input_data):
        """
        推論処理の本体部分。

        Parameters
        ----------
        input_data : dict
            推論処理を実行する対象の入力データ。

        Returns
        -------
        result : dict
            推論処理の結果を保持する辞書型データ。
            基本的にinput_dataと同じ構造です。
        """
        print('### Page Separation ###')
        log_file_path = None
        if self.process_dump_dir is not None:
            log_file_path = os.path.join(self.process_dump_dir, self.cfg['page_separation']['log'])
        inference_output = self._run_src_inference(input=input_data['img'],
                                                   input_path=input_data['img_path'],
                                                   left=self.cfg['page_separation']['left'],
                                                   right=self.cfg['page_separation']['right'],
                                                   single=self.cfg['page_separation']['single'],
                                                   ext=self.cfg['page_separation']['ext'],
                                                   quality=self.cfg['page_separation']['quality'],
                                                   short=self.cfg['page_separation']['short'],
                                                   log=log_file_path)
        if (not self.cfg['page_separation']['allow_invalid_num_output']) and (not len(inference_output) in range(1, 3)):
            print('ERROR: Output from page separation must be 1 or 2 pages.')
            return None

        # Create result to pass img_path and img data
        result = []
        for id, single_output_img in enumerate(inference_output):
            output_data = copy.deepcopy(input_data)
            output_data['img'] = single_output_img
            output_data['orig_img_path'] = input_data['img_path']

            # make and save separated img file name
            if id == 0:
                id = 'L'
            else:
                id = 'R'
            orig_img_name = os.path.basename(input_data['img_path'])
            stem, ext = os.path.splitext(orig_img_name)
            output_data['img_file_name'] = stem + '_' + id + '.jpg'

            result.append(output_data)

        return result