#!/usr/bin/python3

"""Web page to show upcoming events."""

from datetime import date, datetime, timezone

from flask import Flask, render_template

from agenda import get_data

app = Flask(__name__)
app.debug = True


@app.route("/")
def index() -> str:
    """Index page."""
    data = get_data()
    now = datetime.now()
    today = now.date()
    now_utc = datetime.now(timezone.utc)

    def days_hours(when: datetime) -> str:
        delta = when - (now if when.tzinfo is None else now_utc)
        return f"{delta.days:>5,d} days {delta.seconds // 3600:>2.0f} hours"

    def days(when: date) -> str:
        return "today" if when == today else f"{(when - today).days:,d} days"

    return render_template("index.html", days=days, days_hours=days_hours, **data)


if __name__ == "__main__":
    app.run(host="0.0.0.0")