import type { ResolvedLocation } from '../types.js';
import { config } from '../config.js';
import { lookupFinnishLocation } from './finnish-locations.js';
export async function resolveLocation(input: string): Promise<ResolvedLocation> {
const trimmed = input.trim();
// 1. Finnish/Nordic alias map
const alias = lookupFinnishLocation(trimmed);
if (alias) {
return {
lat: alias.lat,
lon: alias.lon,
name: alias.displayName,
icao: alias.icao,
};
}
// 2. Coordinate format: "60.17,24.94" or "60.17 24.94"
const coordMatch = trimmed.match(/^(-?\d+\.?\d*)[,\s]+(-?\d+\.?\d*)$/);
if (coordMatch) {
const lat = parseFloat(coordMatch[1]);
const lon = parseFloat(coordMatch[2]);
return { lat, lon, name: `${lat.toFixed(2)},${lon.toFixed(2)}` };
}
// 3. ICAO code (4-char uppercase)
if (/^[A-Z]{4}$/.test(trimmed)) {
return { lat: 0, lon: 0, name: trimmed, icao: trimmed };
}
// 4. Fallback: Open-Meteo geocoding
const url = `https://geocoding-api.open-meteo.com/v1/search?name=${encodeURIComponent(trimmed)}&count=1&language=en&format=json`;
const controller = new AbortController();
const timeout = setTimeout(() => controller.abort(), config.httpTimeoutMs);
try {
const res = await fetch(url, { signal: controller.signal });
if (!res.ok) {
throw new Error(`Geocoding API returned ${res.status}`);
}
const data = await res.json() as { results?: Array<{ latitude: number; longitude: number; name: string; country?: string }> };
if (!data.results || data.results.length === 0) {
throw new Error(`Location "${trimmed}" not found`);
}
const r = data.results[0];
return {
lat: r.latitude,
lon: r.longitude,
name: r.name,
country: r.country,
};
} finally {
clearTimeout(timeout);
}
}
