import uuid
import subprocess
from pathlib import Path
import json

def geojson2vt(uploaded_geojson) -> str:
    """Convert geojson file to vector tiles

    Args:
        uploaded_geojson: GeoJSON file uploaded by user

    Returns:
        str: vector tiles id
    """
    # save the uploaded file
    # get a path to the saved geojson
    uploaded_geojson_path = "land.geojson"  # replace value with the path to the saved geojson
    vector_tiles_id = uploaded_geojson_path + uuid.uuid4().hex
    tippecanoe_command = f"tippecanoe --maximum-zoom=g --output-to-directory={vector_tiles_id} --drop-densest-as-needed --no-tile-compression {uploaded_geojson_path}"
    #subprocess.run(tippecanoe_command, shell=True)  # https://stackoverflow.com/a/51950538/14742462
    metadata_path = Path(vector_tiles_id, "metadata.json")
    with open(metadata_path, "r") as metadata_file:
        metadata = json.load(metadata_file)

    with open("catalog.json", "r") as catalog_file:
        catalog = json.load(catalog_file)
        catalog.append(metadata)

    with open("catalog.json", "w") as catalog_file:
        json.dump(catalog, catalog_file, ensure_ascii=False)
    return vector_tiles_id

if __name__ == "__main__":
    geojson2vt("ert")