""" A Simple file server for uploading and downloading files """
import json
import os
from argparse import ArgumentParser
from pathlib import Path

from flask import Flask, request, send_from_directory, safe_join
from flask_compress import Compress
from flask_cors import CORS

from config import config

app = Flask(__name__)
CORS(app, **config.get("fileserver.cors"))
Compress(app)


@app.route("/", methods=["POST"])
def upload():
    results = []
    for filename, file in request.files.items():
        if not filename:
            continue
        file_path = filename.lstrip(os.sep)
        target = Path(safe_join(app.config["UPLOAD_FOLDER"], file_path))
        target.parent.mkdir(parents=True, exist_ok=True)
        file.save(str(target))
        results.append(file_path)
    return (json.dumps(results), 200)


@app.route("/<path:path>", methods=["GET"])
def download(path):
    response = send_from_directory(app.config["UPLOAD_FOLDER"], path)
    if config.get("fileserver.download.disable_browser_caching", False):
        headers = response.headers
        headers["Pragma-directive"] = "no-cache"
        headers["Cache-directive"] = "no-cache"
        headers["Cache-control"] = "no-cache"
        headers["Pragma"] = "no-cache"
        headers["Expires"] = "0"
    return response


def main():
    parser = ArgumentParser(description=__doc__)
    parser.add_argument(
        "--port", "-p", type=int, default=8081, help="Port (default %(default)d)"
    )
    parser.add_argument(
        "--ip", "-i", type=str, default="0.0.0.0", help="Address (default %(default)s)"
    )
    parser.add_argument("--debug", action="store_true", default=False)
    parser.add_argument(
        "--upload-folder",
        "-u",
        default="/mnt/fileserver",
        help="Upload folder (default %(default)s)",
    )
    args = parser.parse_args()

    app.config["UPLOAD_FOLDER"] = args.upload_folder

    app.run(debug=args.debug, host=args.ip, port=args.port, threaded=True)


if __name__ == "__main__":
    main()