import ee from '@google/earthengine';
import { JWT } from 'google-auth-library';
import { decodeSaJson } from '../auth/index';
import * as fs from 'fs/promises';
let initialized = false;
export async function initEarthEngineWithSA(){
if (initialized) return;
let sa;
// Try to load from file path first (preferred method for public users)
const keyPath = process.env.GOOGLE_APPLICATION_CREDENTIALS;
if (keyPath) {
try {
const keyContent = await fs.readFile(keyPath, 'utf-8');
sa = JSON.parse(keyContent);
console.log(`Loaded service account from: ${keyPath}`);
// Auto-set project ID and email for other parts of the app
process.env.GCP_PROJECT_ID = sa.project_id;
process.env.GCP_SERVICE_ACCOUNT_EMAIL = sa.client_email;
} catch (error) {
console.error(`Could not load service account key from ${keyPath}:`, error);
// Fall back to encoded JSON method
const decoded = decodeSaJson();
if (decoded.useFile) {
throw new Error(`Cannot read service account file: ${keyPath}`);
}
sa = decoded;
}
} else {
// Fall back to encoded JSON in env variable
const decoded = decodeSaJson();
if (decoded.useFile) {
throw new Error('GOOGLE_APPLICATION_CREDENTIALS is not set. Please set it to your service account key file path.');
}
sa = decoded;
}
const jwt = new JWT({
email: sa.client_email,
key: sa.private_key,
scopes: [
'https://www.googleapis.com/auth/earthengine',
'https://www.googleapis.com/auth/devstorage.read_write'
]
});
const creds = await jwt.authorize();
await new Promise<void>((resolve, reject) =>
ee.data.authenticateViaPrivateKey(sa, () => {
ee.initialize(null, null, () => {
initialized = true;
console.log(`Earth Engine initialized! Project: ${sa.project_id}`);
resolve();
}, reject);
}, reject)
);
}
export function ensureEE(){ if(!initialized) throw new Error('Earth Engine not initialized'); }
export async function getTileService(image: any, vis: any){
ensureEE();
// @ts-ignore
const map = image.getMap(vis);
return { mapId: map.mapid, tileUrlTemplate: map.urlFormat, ttlSeconds: 3600, visParams: vis };
}
