import time
import requests
import os
import json
from datetime import datetime, timedelta
from zoneinfo import ZoneInfo

BASE_URL = "https://desk-api.channel.io/desk/channels/227312"
TARGET_GROUP_CHAT_ID = "536135"

HEADERS = {
    "accept-language": "ja",
    "x-account": os.getenv("dmsendertoken")
}

JST = ZoneInfo("Asia/Tokyo")

# ---------------- 天気コード ----------------

WEATHER_CODE_MAP = {
    0: "☀️晴れ",
    1: "☁️曇り",
    2: "吹雪",
    3: "砂嵐",
    4: "🌫️霧",
    5: "🌫️霧雨",
    6: "🌧️雨",
    7: "🌨️雪",
    8: "🌦️シャワー",
    9: "⛈️雷雨",
}


def format_weather_code(code: int) -> str:
    if code < 10:
        return WEATHER_CODE_MAP.get(code, str(code))

    main = code // 10
    sub = code % 10

    main_str = WEATHER_CODE_MAP.get(main)
    sub_str = WEATHER_CODE_MAP.get(sub)

    if main_str and sub_str:
        return f"{main_str}、{sub_str}"

    return str(code)

# ---------------- Channel 投稿 ----------------


def post_group_message(chat_id, body):
    url = f"{BASE_URL}/groups/{chat_id}/messages"
    r = requests.post(url, headers=HEADERS, json=body)
    r.raise_for_status()
    return r.json()

# ---------------- 時報 ----------------


def create_time_signal_body():
    now = datetime.now(JST)
    hour = now.hour

    if hour < 12:
        period = "午前"
        display_hour = hour if hour != 0 else 12
    else:
        period = "午後"
        display_hour = hour - 12 if hour > 12 else 12

    message = f"<b>時報</b>\n{period}{display_hour}時をお知らせします。"

    return {
        "requestId": f"desk-web-time-signal-{int(time.time())}",
        "blocks": [{"type": "text", "value": message}],
    }

# ---------------- 天気予報 ----------------


def load_todoufuken():
    with open("todoufuken.json", encoding="utf-8") as f:
        return json.load(f)


def fetch_weather(todoufuken):
    lats = ",".join(str(p["lat"]) for p in todoufuken)
    lons = ",".join(str(p["lon"]) for p in todoufuken)

    url = (
        "https://api.open-meteo.com/v1/forecast"
        f"?latitude={lats}"
        f"&longitude={lons}"
        "&hourly=relative_humidity_2m,apparent_temperature,temperature_2m,"
        "precipitation_probability,weather_code"
        "&forecast_days=1"
    )

    r = requests.get(url)
    r.raise_for_status()
    return r.json()


def create_weather_body():
    now = datetime.now(JST)
    today_7am = now.replace(hour=7, minute=0, second=0, microsecond=0)

    todoufuken = load_todoufuken()
    data = fetch_weather(todoufuken)

    lines = ["<b>☀️ 本日の天気予報（7時以降・1時間ごと）</b>"]

    for idx, pref in enumerate(todoufuken):
        hourly = data[idx]["hourly"]
        times = hourly["time"]

        lines.append(f"\n<b>{pref['name']}：</b>")

        for i, t in enumerate(times):
            t_jst = (
                datetime.fromisoformat(t)
                .replace(tzinfo=ZoneInfo("UTC"))
                .astimezone(JST)
            )

            if t_jst < today_7am:
                continue

            wc = hourly["weather_code"][i]
            at = hourly["apparent_temperature"][i]
            temp = hourly["temperature_2m"][i]
            pop = hourly["precipitation_probability"][i]
            rh = hourly["relative_humidity_2m"][i]

            wc_str = format_weather_code(wc)

            line = (
                f"　{t_jst.strftime('%H時')}："
                f"{wc_str} "
                f"{at}℃ {temp}℃ {pop}% {rh}%"
            )
            lines.append(line)

    return {
        "requestId": f"desk-web-weather-{int(time.time())}",
        "blocks": [{"type": "text", "value": "\n".join(lines)}],
    }

# ---------------- メインループ ----------------


def main_loop():
    while True:
        try:
            now = datetime.now(JST)

            # 毎正時の時報
            if now.minute == 0:
                body = create_time_signal_body()
                post_group_message(TARGET_GROUP_CHAT_ID, body)

            # 午後2時9分に天気予報
            if now.hour == 14 and now.minute == 20:
                body = create_weather_body()
                post_group_message(TARGET_GROUP_CHAT_ID, body)

            time.sleep(60)

        except Exception as e:
            print("Error:", e)
            time.sleep(10)


if __name__ == "__main__":
    main_loop()