#!/usr/bin/python3
"""Combined update script for various data sources."""

import asyncio
import os
import smtplib
import sys
from datetime import date, datetime
from email.message import EmailMessage
from email.utils import formatdate, make_msgid
from time import time

import flask
import requests

import agenda.fx
import agenda.thespacedevs
import agenda.types
import agenda.uk_holiday
import agenda.waste_schedule
from agenda import gwr
from web_view import app


async def update_bank_holidays(config: flask.config.Config) -> None:
    """Update cached copy of UK Bank holidays."""
    t0 = time()
    events = await agenda.uk_holiday.get_holiday_list(config["DATA_DIR"])
    time_taken = time() - t0
    if not sys.stdin.isatty():
        return
    print(len(events), "bank holidays in list")
    print(f"took {time_taken:.1f} seconds")


async def update_bristol_bins(config: flask.config.Config) -> None:
    """Update waste schedule from Bristol City Council."""
    t0 = time()
    events = await agenda.waste_schedule.get_bristol_gov_uk(
        date.today(), config["DATA_DIR"], config["BRISTOL_UPRN"], refresh=True
    )
    time_taken = time() - t0
    if not sys.stdin.isatty():
        return
    for event in events:
        print(event)
    print(f"took {time_taken:.1f} seconds")


def send_mail(config: flask.config.Config, subject: str, body: str) -> None:
    """Send an e-mail."""
    msg = EmailMessage()

    msg["Subject"] = subject
    msg["To"] = f"{config['NAME']} <{config['MAIL_TO']}>"
    msg["From"] = f"{config['NAME']} <{config['MAIL_FROM']}>"
    msg["Date"] = formatdate()
    msg["Message-ID"] = make_msgid()

    # Add extra mail headers
    for header, value in config["MAIL_HEADERS"]:
        msg[header] = value

    msg.set_content(body)

    s = smtplib.SMTP(config["SMTP_HOST"])
    s.sendmail(config["MAIL_TO"], [config["MAIL_TO"]], msg.as_string())
    s.quit()


def update_gwr_advance_ticket_date(config: flask.config.Config) -> None:
    """Update GWR advance ticket date cache."""
    filename = os.path.join(config["DATA_DIR"], "advance-tickets.html")
    existing_html = open(filename).read()
    existing_date = gwr.extract_weekday_date(existing_html)

    new_html = requests.get(gwr.url).text
    open(filename, "w").write(new_html)

    new_date = gwr.extract_weekday_date(new_html)

    if existing_date == new_date:
        if sys.stdin.isatty():
            print("date has't changed:", existing_date)
        return

    subject = f"New GWR advance ticket booking date: {new_date}"
    body = f"""Old date: {existing_date}
New date: {new_date}

{gwr.url}

Agenda: https://edwardbetts.com/agenda/
"""
    send_mail(config, subject, body)


def update_thespacedevs(config: flask.config.Config) -> None:
    """Update cache of space launch API."""
    rocket_dir = os.path.join(config["DATA_DIR"], "thespacedevs")

    t0 = time()
    rockets = agenda.thespacedevs.next_launch_api(rocket_dir)
    time_taken = time() - t0
    if not sys.stdin.isatty():
        return
    print(len(rockets), "launches")
    print(f"took {time_taken:.1f} seconds")


def update_gandi(config: flask.config.Config) -> None:
    """Retrieve list of domains from gandi.net."""
    url = "https://api.gandi.net/v5/domain/domains"
    headers = {"authorization": "Bearer " + config["GANDI_TOKEN"]}
    filename = os.path.join(config["DATA_DIR"], "gandi_domains.json")

    r = requests.request("GET", url, headers=headers)
    items = r.json()
    assert isinstance(items, list)
    assert all(item["fqdn"] and item["dates"]["registry_ends_at"] for item in items)
    with open(filename, "w") as out:
        out.write(r.text)


def main() -> None:
    """Update caches."""
    now = datetime.now()
    hour = now.hour

    with app.app_context():
        if hour % 3 == 0:
            asyncio.run(update_bank_holidays(app.config))
            asyncio.run(update_bristol_bins(app.config))
            update_gwr_advance_ticket_date(app.config)
            update_gandi(app.config)

        if hour % 12 == 0:
            agenda.fx.get_rates(app.config)

        update_thespacedevs(app.config)


if __name__ == "__main__":
    main()