import argparse
import json
from pathlib import Path

from detr.test import draw_boxes
from pdf2image import pdf2image

from fb_detr.predictor import Predictor


def parse_args():

    parser = argparse.ArgumentParser()
    parser.add_argument("--resume", required=True)
    parser.add_argument("--output_dir", required=True)
    parser.add_argument("--pdf_path")
    parser.add_argument("--draw_boxes", default=False, action="store_true")

    args = parser.parse_args()

    return args


def build_image_paths(image_root_dir):
    return [*map(str, Path(image_root_dir).glob("*.png"))]


def pdf_to_pages(pdf_path):
    pages = pdf2image.convert_from_path(pdf_path)
    return pages


def main():

    # TDOO: de-hardcode

    classes = {1: "logo", 2: "other", 3: "formula", 4: "signature", 5: "handwriting_other"}

    args = parse_args()
    predictor = Predictor(args.resume, classes=classes, rejection_class="other")

    images = pdf_to_pages(args.pdf_path)
    outputs = predictor.predict(images, 0.5)

    if args.draw_boxes:
        for im, o in zip(images, outputs):
            if len(o["bboxes"]):
                draw_boxes(image=im, **o, output_path=args.output_dir)

    else:
        outputs = predictor.format_predictions(outputs)
        outputs = predictor.filter_predictions(outputs)
        for o in outputs:
            print(json.dumps(o, indent=2))


if __name__ == "__main__":
    main()