# Copyright (c) OpenMMLab. All rights reserved.
import logging
import os.path as osp
from argparse import ArgumentParser

from mmcv import Config

from mmdet.apis import inference_detector, init_detector, show_result_pyplot
from mmdet.utils import get_root_logger


def parse_args():
    parser = ArgumentParser()
    parser.add_argument('config', help='test config file path')
    parser.add_argument('checkpoint_root', help='Checkpoint file root path')
    parser.add_argument('--img', default='demo/demo.jpg', help='Image file')
    parser.add_argument('--aug', action='store_true', help='aug test')
    parser.add_argument('--model-name', help='model name to inference')
    parser.add_argument('--show', action='store_true', help='show results')
    parser.add_argument(
        '--wait-time',
        type=float,
        default=1,
        help='the interval of show (s), 0 is block')
    parser.add_argument(
        '--device', default='cuda:0', help='Device used for inference')
    parser.add_argument(
        '--score-thr', type=float, default=0.3, help='bbox score threshold')
    args = parser.parse_args()
    return args


def inference_model(config_name, checkpoint, args, logger=None):
    cfg = Config.fromfile(config_name)
    if args.aug:
        if 'flip' in cfg.data.test.pipeline[1]:
            cfg.data.test.pipeline[1].flip = True
        else:
            if logger is not None:
                logger.error(f'{config_name}: unable to start aug test')
            else:
                print(f'{config_name}: unable to start aug test', flush=True)

    model = init_detector(cfg, checkpoint, device=args.device)
    # test a single image
    result = inference_detector(model, args.img)

    # show the results
    if args.show:
        show_result_pyplot(
            model,
            args.img,
            result,
            score_thr=args.score_thr,
            wait_time=args.wait_time)
    return result


# Sample test whether the inference code is correct
def main(args):
    config = Config.fromfile(args.config)

    # test single model
    if args.model_name:
        if args.model_name in config:
            model_infos = config[args.model_name]
            if not isinstance(model_infos, list):
                model_infos = [model_infos]
            model_info = model_infos[0]
            config_name = model_info['config'].strip()
            print(f'processing: {config_name}', flush=True)
            checkpoint = osp.join(args.checkpoint_root,
                                  model_info['checkpoint'].strip())
            # build the model from a config file and a checkpoint file
            inference_model(config_name, checkpoint, args)
            return
        else:
            raise RuntimeError('model name input error.')

    # test all model
    logger = get_root_logger(
        log_file='benchmark_test_image.log', log_level=logging.ERROR)

    for model_key in config:
        model_infos = config[model_key]
        if not isinstance(model_infos, list):
            model_infos = [model_infos]
        for model_info in model_infos:
            print('processing: ', model_info['config'], flush=True)
            config_name = model_info['config'].strip()
            checkpoint = osp.join(args.checkpoint_root,
                                  model_info['checkpoint'].strip())
            try:
                # build the model from a config file and a checkpoint file
                inference_model(config_name, checkpoint, args, logger)
            except Exception as e:
                logger.error(f'{config_name} " : {repr(e)}')


if __name__ == '__main__':
    args = parse_args()
    main(args)