import time
import requests
from datetime import datetime

# ===== SMS GATEWAY =====
SMS_USER = "weatherbot"
SMS_PASS = "Cupakabra17"

RECEIVE_URL = "https://sms.internet-master.cz/receive/"
SEND_URL    = "https://sms.internet-master.cz/send/"

POLL_INTERVAL = 1   # 🔥 1 second polling (worst-case ≤5s)
MAX_ERRORS_BEFORE_SLEEP = 3

seen_offsets = set()
error_count = 0

HEADERS = {
    "User-Agent": "weatherbot/1.0 (jakub@jimbuntu)"
}

# =======================

session = requests.Session()
session.headers.update(HEADERS)

def fetch_inbox():
    r = session.get(
        RECEIVE_URL,
        params={
            "username": SMS_USER,
            "password": SMS_PASS,
            "limit": 5
        },
        timeout=5
    )
    r.raise_for_status()
    return r.json()

def send_sms(number, message):
    r = session.get(
        SEND_URL,
        params={
            "number": number,
            "message": message,
            "username": SMS_USER,
            "password": SMS_PASS
        },
        timeout=5
    )
    r.raise_for_status()
    print("📤 SEND:", r.text)

def get_weather(city):
    r = session.get(f"https://wttr.in/{city}?format=j1", timeout=5)

    if r.status_code != 200:
        return f"❌ Weather unavailable for {city}"

    data = r.json()
    weather = data.get("weather", [])

    if len(weather) < 3:
        return f"❌ Weather unavailable for {city}"

    msg = f"🌦 Weather for {city}:\n"

    for day in weather[:3]:
        date = day["date"]
        avgtemp = day["avgtempC"]
        desc = day["hourly"][0]["weatherDesc"][0]["value"]
        weekday = datetime.strptime(date, "%Y-%m-%d").strftime("%a")
        msg += f"{weekday}: {avgtemp}°C, {desc}\n"

    return msg.strip()

# ===== MAIN LOOP =====
print("📡 SMS Weather Bot started (≤5s reply mode)")

while True:
    try:
        data = fetch_inbox()
        inbox = data.get("inbox", [])

        error_count = 0  # reset on success

        for sms in inbox:
            offset = sms["offset"]
            if offset in seen_offsets:
                continue

            phone = sms["phone"]
            text  = sms["message"].strip()

            print(f"📨 {phone}: {text}")

            reply = get_weather(text)
            send_sms(phone, reply)

            seen_offsets.add(offset)
            print(f"✅ Replied to {phone}")

    except Exception as e:
        error_count += 1
        print("⚠ ERROR:", e)

        # If gateway is unstable, slow down briefly
        if error_count >= MAX_ERRORS_BEFORE_SLEEP:
            print("⏳ Too many errors, sleeping 5s")
            time.sleep(5)
            error_count = 0

    time.sleep(POLL_INTERVAL)