import json
import atexit
import datetime

from flask import Flask, jsonify, request

DB_FILE = "vacation.db"

last_update = datetime.datetime.now()

app = Flask(__name__)
app.config["APPLICATION_ROOT"] = "/vacation/api"
app.url_map.strict_slashes = False

with open(DB_FILE) as infile:
    db = json.load(infile)


@atexit.register
def save_db(prefix=""):
    with open(prefix + DB_FILE, "w") as outfile:
        json.dump(db, outfile)


def backup_db():
    save_db(f"backup-{datetime.datetime.now().isoformat()}-")


@app.route("/")
def health():
    return jsonify({"status": "healthy"})


@app.route("/status", methods=["GET", "POST"])
def status():
    if request.method == "GET":
        return jsonify({
            "lastUpdated": last_update.iso_format(),
            "availability": [
                {
                    "name": name,
                    "availability": avail,
                } for name, avail in db.items()
            ],
        })

    body = request.get_json()

    print(body)

    last_update = datetime.datetime.now()

    # TODO actually implement updates
    
    return 204, ""