# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
#
# 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.

from __future__ import absolute_import
from __future__ import division
from __future__ import print_function

__all__ = ['E2EMetric']

from ppocr.utils.e2e_metric.Deteval import get_socre, combine_results
from ppocr.utils.e2e_utils.extract_textpoint import get_dict


class E2EMetric(object):
    def __init__(self,
                 character_dict_path,
                 main_indicator='f_score_e2e',
                 **kwargs):
        self.label_list = get_dict(character_dict_path)
        self.max_index = len(self.label_list)
        self.main_indicator = main_indicator
        self.reset()

    def __call__(self, preds, batch, **kwargs):
        temp_gt_polyons_batch = batch[2]
        temp_gt_strs_batch = batch[3]
        ignore_tags_batch = batch[4]
        gt_polyons_batch = []
        gt_strs_batch = []

        temp_gt_polyons_batch = temp_gt_polyons_batch[0].tolist()
        for temp_list in temp_gt_polyons_batch:
            t = []
            for index in temp_list:
                if index[0] != -1 and index[1] != -1:
                    t.append(index)
            gt_polyons_batch.append(t)

        temp_gt_strs_batch = temp_gt_strs_batch[0].tolist()
        for temp_list in temp_gt_strs_batch:
            t = ""
            for index in temp_list:
                if index < self.max_index:
                    t += self.label_list[index]
            gt_strs_batch.append(t)

        for pred, gt_polyons, gt_strs, ignore_tags in zip(
            [preds], [gt_polyons_batch], [gt_strs_batch], ignore_tags_batch):
            # prepare gt
            gt_info_list = [{
                'points': gt_polyon,
                'text': gt_str,
                'ignore': ignore_tag
            } for gt_polyon, gt_str, ignore_tag in
                            zip(gt_polyons, gt_strs, ignore_tags)]
            # prepare det
            e2e_info_list = [{
                'points': det_polyon,
                'text': pred_str
            } for det_polyon, pred_str in zip(pred['points'], pred['strs'])]
            result = get_socre(gt_info_list, e2e_info_list)
            self.results.append(result)

    def get_metric(self):
        metircs = combine_results(self.results)
        self.reset()
        return metircs

    def reset(self):
        self.results = []  # clear results
