import json
from argparse import ArgumentParser
from time import time

import numpy as np

from microqa.items import cache_item, fetch_item
from microqa.engine import analyze_doc


def main():
    parser = ArgumentParser()
    parser.add_argument("--item-id")
    parser.add_argument(
        "--ocr-backend",
        help="which local OCR backend to use when available text in archived PDF files is insufficient; one of 'tesseract' or 'paddleocr'",
        default="tesseract",
    )
    parser.add_argument("--verbose", action="store_true")
    args = parser.parse_args()

    # Import OCR engine modules only as needed, to avoid unnecessary slow
    # startups and/or missing dependency errors.
    if args.ocr_backend == "tesseract":
        from microqa.ocr.tesseract import TesseractOcrEngine

        ocr_engine = TesseractOcrEngine(languages=["eng", "fra"])
    elif args.ocr_backend == "paddleocr":
        from microqa.ocr.paddleocr import PaddleOcrEngine

        ocr_engine = PaddleOcrEngine(languages=["eng", "fra"])

    cache_item(
        args.item_id,
        # Will not refetch if value is already cached.
        overwrite=False,
    )
    item = fetch_item(args.item_id, use_cache=True)

    t_start = time()

    minimal_docs = (
        [doc for doc in item.docs if doc.name != doc.identifier]
        if len(item.docs) > 1
        else item.docs
    )
    analyses = [
        analyze_doc(
            doc=doc, ocr_engine=ocr_engine, use_cache=True, verbose=args.verbose
        )
        for doc in minimal_docs
    ]

    t_end = time()

    print(
        json.dumps(
            {
                "analyses": analyses,
                "duration_secs": t_end - t_start,
                "disoriented_pages": [
                    [
                        i
                        for i, page in enumerate(doc["pages"])
                        if 45 < page["page_angle"] < 315
                    ]
                    for doc in analyses
                ],
                "sharpness_max": max(
                    *[page["sharpness"] for doc in analyses for page in doc["pages"]]
                ),
                "sharpness_median": np.median(
                    [page["sharpness"] for doc in analyses for page in doc["pages"]]
                ).tolist(),
                "sharpness_min": min(
                    *[page["sharpness"] for doc in analyses for page in doc["pages"]]
                ),
            }
        )
    )


if __name__ == "__main__":
    main()