import { onRequest } from "firebase-functions/v2/https";
import { Request } from "firebase-functions/v2/https";
import * as path from 'path';
import { getCorsHandler } from "../shared/middleware";
import { getLogger, getAdmin } from "../shared/config";

const corsHandler = getCorsHandler();
const admin = getAdmin();
const logger = getLogger();

export const accessFile = onRequest({
    region: '#{SERVICES_RGN}#'
}, async (request: Request, response) => {
    return corsHandler(request, response, async () => {
        try {
            const filePath = request.query.path as string;
            if (!filePath) {
                response.status(400).send('File path is required');
                return;
            }

            const expirationMs = 60 * 60 * 1000;
            const bucket = admin.storage().bucket();
            const file = bucket.file(filePath);

            const [exists] = await file.exists();
            if (!exists) {
                response.status(404).send('File not found');
                return;
            }

            const [signedUrl] = await file.getSignedUrl({
                action: 'read',
                expires: Date.now() + expirationMs,
                responseDisposition: `attachment; filename="${path.basename(filePath)}"`,
            });

            response.redirect(signedUrl);
            logger.info(`File access redirect for ${filePath}`);
        } catch (error) {
            logger.error('Error accessing file:', error);
            response.status(500).send('Error accessing file');
        }
    });
});