#!/usr/bin/env python3
import os
import subprocess
import threading
import time
import urllib.parse

import requests

BASE = os.path.dirname(os.path.abspath(__file__))
LOG = os.path.join(BASE, "bot.log")
TV_API = "http://127.0.0.1:8600/tv/mensaje"


def log(linea):
    try:
        with open(LOG, "a") as f:
            f.write(f"{time.strftime('%H:%M:%S')} {linea}\n")
    except Exception:
        pass


def load_env():
    env = {}
    try:
        for line in open(os.path.join(BASE, ".env")):
            line = line.strip()
            if line and not line.startswith("#") and "=" in line:
                k, v = line.split("=", 1)
                env[k.strip()] = v.strip()
    except Exception:
        pass
    return env


ENV = load_env()
TOKEN = ENV.get("TELEGRAM_TOKEN", "")
CHAT_ID = ENV.get("TELEGRAM_CHAT_ID", "")
ALERTA_TEMP = float(ENV.get("ALERTA_TEMP", "80"))


def sh(cmd):
    try:
        return subprocess.run(cmd, shell=True, capture_output=True,
                              text=True, timeout=10).stdout.strip()
    except Exception:
        return "n/a"


def estado():
    temp = sh("vcgencmd measure_temp")
    upt = sh("uptime -p")
    load = open("/proc/loadavg").read().split()[:3]
    free = sh("free -h | awk 'NR==2{print $2\" total, \"$7\" disponible\"}'")
    disk = sh("df -h / | awk 'NR==2{print $3\" usados de \"$2\" (\"$5\")\"}'")
    ips = sh("hostname -I")
    temp_c = None
    try:
        temp_c = float(temp.replace("'C", "").replace("temp=", ""))
    except Exception:
        pass
    msg = (
        "📊 Estado de <b>minipc</b>:\n"
        f"🌡️ Temperatura: <b>{temp}</b>\n"
        f"🔌 Uptime: {upt}\n"
        f"⚙️ Carga: {', '.join(load)}\n"
        f"🧠 RAM: {free}\n"
        f"💾 Disco /: {disk}\n"
        f"🌐 IPs: {ips}"
    )
    return msg, temp_c


def enviar(texto, chat_id):
    try:
        requests.post(
            f"https://api.telegram.org/bot{TOKEN}/sendMessage",
            data={"chat_id": chat_id, "text": texto, "parse_mode": "HTML"},
            timeout=10,
        )
    except Exception as e:
        print("Error enviando:", e)


def mandar_tv(mensaje, simple):
    try:
        url = f"{TV_API}?texto={urllib.parse.quote(mensaje)}"
        if simple:
            url += "&simple=1"
        r = requests.get(url, timeout=8)
        return r.status_code == 200
    except Exception as e:
        log(f"tv error: {e}")
        return False


def procesar(texto, chat_id):
    t = texto.lower().strip()
    log(f"RECIBIDO chat={chat_id} texto={texto!r}")
    if t in ("estado", "/estado", "status", "/status"):
        msg, _ = estado()
        enviar(msg, chat_id)
    elif "temperatura" in t or "temp" in t:
        temp = sh("vcgencmd measure_temp")
        enviar(f"🌡️ Temperatura de la Pi: <b>{temp}</b>", chat_id)
    elif t.startswith("tv ") or t.startswith("/tv "):
        msj = texto.split(" ", 1)[1].strip()
        if not msj:
            enviar("Uso: <b>tv &lt;mensaje&gt;</b> (mensaje rapido a la tele)", chat_id)
        else:
            ok = mandar_tv(msj, simple=True)
            enviar("📺 Mensaje enviado a la tele ✅" if ok
                   else "❌ No se pudo enviar a la tele", chat_id)
    elif t.startswith("alarma ") or t.startswith("/alarma "):
        msj = texto.split(" ", 1)[1].strip()
        if not msj:
            enviar("Uso: <b>alarma &lt;mensaje&gt;</b> (secuencia completa: sirena x3)", chat_id)
        else:
            ok = mandar_tv(msj, simple=False)
            enviar("🚨 Alarma lanzada en la tele ✅" if ok
                   else "❌ No se pudo lanzar la alarma", chat_id)
    elif t in ("ayuda", "/ayuda", "help", "/help"):
        enviar("Comandos:\n"
               "<b>estado</b> — estado de la Pi\n"
               "<b>temperatura</b> — temperatura\n"
               "<b>tv &lt;mensaje&gt;</b> — mensaje rapido a la tele\n"
               "<b>alarma &lt;mensaje&gt;</b> — secuencia completa (sirena x3)",
               chat_id)


def monitor_temperatura():
    while True:
        time.sleep(300)
        msg, temp_c = estado()
        if temp_c is not None and temp_c > ALERTA_TEMP:
            enviar(f"🚨 ALERTA: la Pi está a <b>{temp_c:.1f}°C</b> "
                   f"(límite {ALERTA_TEMP}°C)\n{msg}", CHAT_ID)


def main():
    if not TOKEN:
        print("Falta TELEGRAM_TOKEN en .env")
        return
    threading.Thread(target=monitor_temperatura, daemon=True).start()
    offset = None
    log("Bot iniciado")
    print("Bot iniciado. Esperando mensajes...")
    while True:
        try:
            params = {"timeout": 25}
            if offset:
                params["offset"] = offset
            r = requests.get(
                f"https://api.telegram.org/bot{TOKEN}/getUpdates",
                params=params, timeout=35,
            ).json()
            for upd in r.get("result", []):
                offset = upd["update_id"] + 1
                log(f"UPDATE {upd.get('update_id')}")
                msg = upd.get("message") or upd.get("channel_post")
                if not msg:
                    continue
                texto = msg.get("text")
                chat_id = msg["chat"]["id"]
                if texto:
                    procesar(texto, chat_id)
        except Exception as e:
            log(f"ERROR {e}")
            print("Error:", e)
            time.sleep(3)


if __name__ == "__main__":
    main()