"""Ntfy notification helpers — send meal reminders with action buttons."""

from __future__ import annotations

import json
import urllib.request
import urllib.error
from datetime import date


def _ntfy_headers(token: str) -> dict[str, str]:
    """Build Authorization header if token is provided."""
    headers = {"Content-Type": "application/json"}
    if token.strip():
        headers["Authorization"] = f"Bearer {token.strip()}"
    return headers


def send_meal_reminder(
    ntfy_url: str,
    ntfy_token: str,
    callback_token: str,
    meal_type: str,
    for_date: date,
    app_base_url: str,
) -> bool:
    """Send a meal reminder notification with Home/Out action buttons.

    Args:
        ntfy_url: Full topic URL (e.g. https://ntfy.sh/mytopic).
        ntfy_token: Bearer token for auth (empty for public topics).
        callback_token: Per-user token for the webhook callback.
        meal_type: 'lunch' or 'dinner'.
        for_date: The meal date.
        app_base_url: Base URL of this app (e.g. https://meals.ct.cozytren.ch).

    Returns:
        True if the notification was sent successfully.
    """
    date_str = for_date.isoformat()
    meal_label = "Lunch" if meal_type == "lunch" else "Dinner"
    emoji = "🌤" if meal_type == "lunch" else "🌙"

    callback_url = f"{app_base_url.rstrip('/')}/api/ntfy-callback"

    payload = {
        "topic": ntfy_url.rstrip("/").rsplit("/", 1)[-1],
        "title": f"{emoji} {meal_label} — Meal Reminder",
        "message": f"Will you be home for {meal_label.lower()} on {date_str}?",
        "priority": 4,
        "tags": ["plate_with_cutlery"],
        "actions": [
            {
                "action": "http",
                "label": "🏠 Home",
                "method": "POST",
                "url": callback_url,
                "headers": {"Content-Type": "application/json"},
                "body": json.dumps({
                    "token": callback_token,
                    "meal_type": meal_type,
                    "date": date_str,
                    "status": "yes",
                }),
            },
            {
                "action": "http",
                "label": "🍽 Out",
                "method": "POST",
                "url": callback_url,
                "headers": {"Content-Type": "application/json"},
                "body": json.dumps({
                    "token": callback_token,
                    "meal_type": meal_type,
                    "date": date_str,
                    "status": "no",
                }),
            },
        ],
        "click": f"{app_base_url.rstrip('/')}/dashboard?date={date_str}",
    }

    data = json.dumps(payload).encode("utf-8")
    req = urllib.request.Request(ntfy_url, data=data, headers=_ntfy_headers(ntfy_token))

    try:
        with urllib.request.urlopen(req, timeout=10) as resp:
            return 200 <= resp.status < 300
    except urllib.error.URLError as e:
        print(f"[ntfy] Failed to send to {ntfy_url}: {e}")
        return False


def send_test_notification(ntfy_url: str, ntfy_token: str) -> bool:
    """Send a simple test notification to verify ntfy configuration."""
    payload = {
        "topic": ntfy_url.rstrip("/").rsplit("/", 1)[-1],
        "title": "✅ Meal Tracker — Test",
        "message": "Your ntfy integration is working! You'll receive meal reminders here.",
        "priority": 3,
        "tags": ["white_check_mark"],
    }

    data = json.dumps(payload).encode("utf-8")
    req = urllib.request.Request(ntfy_url, data=data, headers=_ntfy_headers(ntfy_token))

    try:
        with urllib.request.urlopen(req, timeout=10) as resp:
            return 200 <= resp.status < 300
    except urllib.error.URLError as e:
        print(f"[ntfy] Test failed for {ntfy_url}: {e}")
        return False