#!/usr/bin/env python
# vim: syntax=python

import os
import json
import requests
import logging
from datetime import datetime, timedelta

logging.basicConfig(level=logging.ERROR)
logger = logging.getLogger(__name__)

CACHE_EXPIRATION = 60
XDG_CACHE_HOME = os.getenv("XDG_CACHE_HOME", os.path.expanduser("~/.cache"))
CACHE_DIR = os.path.join(XDG_CACHE_HOME, "zephyr")
FALLBACK_CACHE_DIR = "/tmp"
CACHE_FILE = os.path.join(CACHE_DIR, "zephyr_cache.json")

SUNNY = "\udb81\udda8"
CLOUDY = "\ue312"
RAIN = "\ue318"
SNOW = "\ue31a"
THUNDERSTORM = "\ue31d"
PARTLY_CLOUDY = "\ue302"
CLEAR = "\ue30d"

HOURS_AGO_THRESHOLD = 2
TEMP_THRESHOLD_COLD = 10
TEMP_THRESHOLD_HOT = 0


def ensure_cache_directory():
    try:
        if not os.path.exists(CACHE_DIR):
            os.makedirs(CACHE_DIR, exist_ok=True)
    except Exception as e:
        logger.error(f"Error creating cache directory: {e}")


def get_weather_data():
    ensure_cache_directory()
    try:
        response = requests.get("https://wttr.in/?format=j1")
        response.raise_for_status()
        return response.json()
    except requests.exceptions.RequestException as e:
        logger.error(f"Error fetching weather data: {e}")
        return None


def get_cached_weather_data():
    try:
        if os.path.exists(CACHE_FILE):
            with open(CACHE_FILE, "r") as cache_file:
                cached_data = json.load(cache_file)
                cache_time = datetime.strptime(
                    cached_data["timestamp"], "%Y-%m-%d %H:%M:%S"
                )
                if datetime.now() - cache_time < timedelta(minutes=CACHE_EXPIRATION):
                    return cached_data["data"]
    except Exception as e:
        logger.error(f"Error loading cached data: {e}")
    return None


def cache_weather_data(data):
    try:
        with open(CACHE_FILE, "w") as cache_file:
            cached_data = {
                "data": data,
                "timestamp": datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
            }
            json.dump(cached_data, cache_file)
    except Exception as e:
        logger.error(f"Error caching data: {e}")


def format_time(time):
    return time.replace("00", "").zfill(2)


def format_temp(temp):
    return f" {temp}°".ljust(4)


def get_emoji_for_condition(condition):
    emoji_map = {
        "Sunny": SUNNY,
        "Partly cloudy": PARTLY_CLOUDY,
        "Overcast": CLOUDY,
        "Patchy rain nearby": RAIN,
        "Clear": CLEAR,
        "Fog": "\ue313",
        "Frost": "\udb83\udf29",
        "Thunder": THUNDERSTORM,
        "Snow": SNOW,
        "Windy": "\u27A7",
        "Mist": "\u2601",
        "Drizzle": "\u2601",
        "Heavy rain": "\u2614",
        "Sleet": "\u2744",
        "Wintry mix": "\u2744",
        "Clear/Sunny": CLEAR,
        "Clear/Mostly clear": CLEAR,
        "Clear/Mostly clear (night)": CLEAR,
        "Drizzle (night)": "\u2601",
    }
    return emoji_map.get(condition, "")


def format_conditions(hour):
    condition_probabilities = {
        "chanceoffog": "Fog",
        "chanceoffrost": "Frost",
        "chanceofovercast": "Overcast",
        "chanceofrain": "Rain",
        "chanceofsnow": "Snow",
        "chanceofsunshine": "Sunshine",
        "chanceofthunder": "Thunder",
        "chanceofwindy": "Wind",
    }
    if "chanceofpartlycloudy" in hour:
        condition_probabilities["chanceofpartlycloudy"] = "Partly Cloudy"
    conditions = []
    for event, description in condition_probabilities.items():
        if event in hour:
            probability = int(hour[event])
            if probability > 0:
                emoji = get_emoji_for_condition(description)
                conditions.append(f"{emoji} {description} {probability}%")
    return ", ".join(conditions)


def format_weather_data(weather_data):
    current_condition = weather_data["current_condition"][0]
    temp = int(current_condition["FeelsLikeC"])
    temp_sign = "+" if TEMP_THRESHOLD_HOT > temp > TEMP_THRESHOLD_COLD else ""
    formatted_data = {
        "text": f" {SUNNY} \n {temp_sign}{temp}°",
        "tooltip": f"{current_condition['weatherDesc'][0]['value']} {current_condition['temp_C']}°\n"
        f"Feels like: {current_condition['FeelsLikeC']}°\n"
        f"Wind: {current_condition['windspeedKmph']}Km/h\n"
        f"Humidity: {current_condition['humidity']}%\n",
    }
    for i, day in enumerate(weather_data["weather"]):
        formatted_data["tooltip"] += f"\n"
        if i == 0:
            formatted_data["tooltip"] += "Today, "
        if i == 1:
            formatted_data["tooltip"] += "Tomorrow, "
        formatted_data["tooltip"] += f"{day['date']}\n"
        formatted_data["tooltip"] += f"⬆️ {day['maxtempC']}° ⬇️ {day['mintempC']}° "
        formatted_data[
            "tooltip"
        ] += f"🌅 {day['astronomy'][0]['sunrise']} 🌇 {day['astronomy'][0]['sunset']}\n"
        now = datetime.now()
        for hour in day["hourly"]:
            hour_time = format_time(hour["time"])
            if i == 0 and int(hour_time) < now.hour - HOURS_AGO_THRESHOLD:
                continue
            formatted_data[
                "tooltip"
            ] += f"{hour_time} {get_emoji_for_condition(hour['weatherDesc'][0]['value'])} {format_temp(hour['FeelsLikeC'])} {hour['weatherDesc'][0]['value']}, {format_conditions(hour)}\n"
    return formatted_data


def main():
    weather_data = get_weather_data()
    if weather_data is None:
        weather_data = get_cached_weather_data()
    if weather_data:
        formatted_data = format_weather_data(weather_data)
        cache_weather_data(formatted_data)
        print(json.dumps(formatted_data))


if __name__ == "__main__":
    main()