import { z } from 'zod';
import type { tool } from '../types.js';
import { resolveLocation } from '../utils/location.js';
import { fetchOpenMeteoForecast } from '../sources/open-meteo.js';
import { fetchWeatherApiAstronomy } from '../sources/weatherapi.js';
const schema = {
location: z.string().describe('City name, coordinates (lat,lon), or Finnish city alias'),
date: z.string().optional().describe('Date in YYYY-MM-DD format (default: today)'),
};
export const astronomyTool: tool<typeof schema> = {
name: 'get_astronomy',
description: 'Get sunrise, sunset, day length, and optionally moon data for a location. Moon phase and moonrise/moonset available when WeatherAPI key is configured.',
schema,
handler: async (args) => {
try {
const loc = await resolveLocation(args.location);
const date = args.date ?? new Date().toISOString().split('T')[0];
const lines: string[] = [
`Astronomy for ${loc.name} on ${date}`,
'',
];
// Sunrise/sunset from Open-Meteo forecast (always available)
const forecastResult = await fetchOpenMeteoForecast(loc.lat, loc.lon, 1);
if (forecastResult.ok && forecastResult.data.length > 0) {
const day = forecastResult.data[0];
if (day.sunrise && day.sunset) {
const rise = day.sunrise.includes('T') ? day.sunrise.split('T')[1] : day.sunrise;
const set = day.sunset.includes('T') ? day.sunset.split('T')[1] : day.sunset;
// Calculate day length
const riseDate = new Date(day.sunrise);
const setDate = new Date(day.sunset);
const diffMs = setDate.getTime() - riseDate.getTime();
const hours = Math.floor(diffMs / 3600000);
const minutes = Math.floor((diffMs % 3600000) / 60000);
lines.push(`Sunrise: ${rise}`);
lines.push(`Sunset: ${set}`);
lines.push(`Day length: ${hours}h ${minutes}m`);
// Solar noon approximation
const noonMs = riseDate.getTime() + diffMs / 2;
const noonDate = new Date(noonMs);
lines.push(`Solar noon: ~${noonDate.toTimeString().slice(0, 5)}`);
}
}
// Moon data from WeatherAPI (optional)
const astroResult = await fetchWeatherApiAstronomy(loc.lat, loc.lon, date);
if (astroResult.ok) {
const a = astroResult.data;
lines.push('');
if (a.moonPhase) lines.push(`Moon phase: ${a.moonPhase}`);
if (a.moonIllumination !== undefined) lines.push(`Moon illumination: ${a.moonIllumination}%`);
if (a.moonrise) lines.push(`Moonrise: ${a.moonrise}`);
if (a.moonset) lines.push(`Moonset: ${a.moonset}`);
}
lines.push('');
lines.push(`Location: (${loc.lat}, ${loc.lon})`);
return { content: [{ type: 'text', text: lines.join('\n') }] };
} catch (err) {
return { content: [{ type: 'text', text: `Error: ${String(err)}` }] };
}
},
};
