#!/usr/bin/env python3
"""
HomeAI Reminder Daemon — checks ~/homeai-data/reminders.json every 60s
and fires TTS via POST http://localhost:8081/api/tts when reminders are due.
"""

import json
import os
import time
import urllib.request
from datetime import datetime

REMINDERS_FILE = os.path.expanduser("~/homeai-data/reminders.json")
TTS_URL = "http://localhost:8081/api/tts"
CHECK_INTERVAL = 60  # seconds


def load_reminders():
    try:
        with open(REMINDERS_FILE) as f:
            return json.load(f)
    except (FileNotFoundError, json.JSONDecodeError):
        return {"reminders": []}


def save_reminders(data):
    with open(REMINDERS_FILE, "w") as f:
        json.dump(data, f, indent=2)


def fire_tts(message):
    """Speak reminder via the OpenClaw bridge TTS endpoint."""
    try:
        payload = json.dumps({"text": f"Reminder: {message}"}).encode()
        req = urllib.request.Request(
            TTS_URL,
            data=payload,
            headers={"Content-Type": "application/json"},
            method="POST"
        )
        urllib.request.urlopen(req, timeout=30)
        print(f"[{datetime.now().isoformat()}] TTS fired: {message}")
        return True
    except Exception as e:
        print(f"[{datetime.now().isoformat()}] TTS error: {e}")
        return False


def check_reminders():
    data = load_reminders()
    now = datetime.now()
    changed = False

    for r in data.get("reminders", []):
        if r.get("fired"):
            continue

        try:
            due = datetime.fromisoformat(r["due_at"])
        except (KeyError, ValueError):
            continue

        if now >= due:
            print(f"[{now.isoformat()}] Reminder due: {r.get('message', '?')}")
            fire_tts(r["message"])
            r["fired"] = True
            changed = True

    if changed:
        # Clean up fired reminders older than 24h
        cutoff = (now.timestamp() - 86400) * 1000
        data["reminders"] = [
            r for r in data["reminders"]
            if not r.get("fired") or int(r.get("id", "0")) > cutoff
        ]
        save_reminders(data)


def main():
    print(f"[{datetime.now().isoformat()}] Reminder daemon started (check every {CHECK_INTERVAL}s)")
    while True:
        try:
            check_reminders()
        except Exception as e:
            print(f"[{datetime.now().isoformat()}] Error: {e}")
        time.sleep(CHECK_INTERVAL)


if __name__ == "__main__":
    main()