#!/usr/bin/env -S uv run --script
#
# /// script
# requires-python = ">=3.12"
# dependencies = [
# ]
# ///
"""
Download UD metadata for the different releases from the lindat clarin-dspace
repository into `./etc/`:
- BibTeX "Howto Cite"
  (use the item's own data from the webpage)
- dc.description
  (use the clarin-dspace API to retrieve the item's metadata)

We assume a clarin-dspace infrastructure with:
- ".../repository/server/api/core/refbox/citations?type=bibtex&handle="
  returning a bibtex entry for the given hdl
- ".../repository/server/api/core/items/" as the API endpoint (core/items)
"""

import json
import re
import argparse
import logging
from pathlib import Path
from urllib.error import URLError
from urllib.request import urlopen
from urllib.parse import urlparse

# URL prefix
citation_url_prefix = "https://lindat.mff.cuni.cz/repository/server/api/core/refbox/citations?type=bibtex&handle="
description_url_prefix = "https://lindat.mff.cuni.cz/repository/server/api/core/items/"
handle_url_prefix = "http://hdl.handle.net/"
handle_redirect_url_prefix = "https://lindat.mff.cuni.cz/repository/items/"

# OUTPUTFILE(s) directories
outfile_pathprefix = "./etc/"
citation_outfile_name = "citation-{rev}"
description_outfile_name = "description-{rev}"

# List of URL postfixes
url_postfixes = {
    # https://github.com/UniversalDependencies/docs/blob/pages-source/download.md
    # "2.18": "", 
    "2.17": "11234/1-6036",  # 339 treebanks, 186 languages, released November 15, 2025.
    "2.16": "11234/1-5901",  # 319 treebanks, 179 languages, released May 15, 2025.
    "2.15": "11234/1-5787",  # 296 treebanks, 168 languages, released November 15, 2024.
    "2.14": "11234/1-5502",  # 283 treebanks, 161 languages, released May 15, 2024.
    "2.13": "11234/1-5287",  # 259 treebanks, 148 languages, released November 15, 2023.
    "2.12": "11234/1-5150",  # 245 treebanks, 141 languages, released May 15, 2023.
    "2.11": "11234/1-4923",  # 243 treebanks, 138 languages, released November 15, 2022.
    "2.10": "11234/1-4758",  # 228 treebanks, 130 languages, released May 15, 2022.
    "2.9":  "11234/1-4611",  # 217 treebanks, 122 languages, released November 15, 2021.
    "2.8":  "11234/1-3687",  # 202 treebanks, 114 languages, released May 15, 2021.
    "2.7":  "11234/1-3424",  # 183 treebanks, 104 languages, released November 15, 2020.
}

# Parse command line arguments
parser = argparse.ArgumentParser(description=__doc__,
                                 formatter_class=argparse.RawDescriptionHelpFormatter)
parser.add_argument('-o', '--override', action='store_true',
                    help='override output file if it already exists')
parser.add_argument('-v', '--verbose', action='count', default=0,
                    help='increase verbosity level')
args = parser.parse_args()

# Set up logging
logging.basicConfig(
    level = max(logging.DEBUG, logging.INFO - args.verbose * 10),
    format='%(asctime)s [%(levelname)s] %(message)s',
    datefmt='%Y-%m-%d %H:%M:%S'
)

# Iterate over the URL postfixes
for rev,handle in url_postfixes.items():

    try:
        # Construct the full URL
        citation_url = citation_url_prefix + handle
        logging.debug(f"Using Citation URL: {citation_url}")

        # Send a GET request to the URL
        with urlopen(citation_url) as response:

            # Read the JSON content
            data = json.loads(response.read().decode())

            # Extract the metadata field
            metadata = data.get("metadata")

            # Write the metadata to the output file
            if metadata:
                # Replace uneven space(s) at the beginning of lines with fixed
                # number of spaces
                metadata = "\n".join([re.sub('^( )+', '   ', line) for line in
                            metadata.split("\n")])

                # Open the output file in write mode
                output_fn = f"{outfile_pathprefix}"+citation_outfile_name.format(rev=rev)
                if args.override or not Path(output_fn).exists():
                    with open(output_fn, "w") as fh:
                        fh.write(metadata + "\n")
                        logging.info(f"Successfully downloaded citation from {citation_url} and written to {output_fn}.")
                else:
                    logging.info(f"Output {output_fn} already exists: Not overriding.")


        # Construct the full URL
        handle_url = handle_url_prefix + handle
        logging.debug(f"Using handle URL: {handle_url}")
        # Send a GET request to the URL
        with urlopen(handle_url) as response:
            if response.url.startswith(handle_redirect_url_prefix):
                itemid = (urlparse(response.url)).path.rsplit("/", 1)[-1]

                description_url = description_url_prefix + itemid
                with urlopen(description_url) as response:
                    data = json.loads(response.read().decode())
                    description = data["metadata"]["dc.description"][0]["value"]
                    if description:

                        # Open the output file in write mode
                        output_fn = f"{outfile_pathprefix}"+description_outfile_name.format(rev=rev)
                        if args.override or not Path(output_fn).exists():
                            with open(output_fn, "w") as fh:
                                fh.write(description+ "\n")
                                logging.info(f"Successfully downloaded description from {description_url} and written to {output_fn}.")
                        else:
                            logging.info(f"Output {output_fn} already exists: Not overriding.")

    except URLError as e:
        logging.error(f"Error downloading: {e}")
    except json.JSONDecodeError as e:
        logging.error(f"Error decoding JSON: {e}")