import {
    PutObjectCommand,
    S3Client,
    S3ServiceException
} from "@aws-sdk/client-s3"; // @see https://www.backblaze.com/docs/cloud-storage-use-the-aws-sdk-for-javascript-v3-with-backblaze-b2
import { readFile } from 'fs/promises';
import { env } from '../config/env' // adjust this path based on your project structure
import logger from "./logger";
import { getNanoSpawn } from "./nanoSpawn";

let client: S3Client | null = null


export async function uploadFile(
    s3Client: S3Client,
    bucket: string,
    key: string,
    filePath: string,
    mimetype: string
): Promise<string> {
    if (!s3Client) throw new Error('uploadFile requires s3Client as first param');
    if (!bucket) throw new Error('uploadFile requires bucket as second param');
    if (!key) throw new Error('uploadFile requires key as third param');
    if (!filePath) throw new Error('uploadFile requires filePath as fourth param');
    if (!mimetype) throw new Error('uploadFile requires mimetype as fifth param');
    logger.debug(`[uploadFile] filePath=${filePath} with key=${key} bucket=${bucket}`);

    const spawn = await getNanoSpawn();
    await spawn('b2', ['file', 'upload', bucket, filePath, key])

    return key

    // try {
    //     // Read file content from disk
    //     const fileBuffer = await readFile(filePath);

    //     // Upload to S3
    //     await s3Client.send(
    //         new PutObjectCommand({
    //             Bucket: bucket,
    //             Key: key,
    //             Body: fileBuffer,
    //             ContentType: mimetype, // or determine dynamically if needed
    //         }),
    //     );

    //     return key;

    // } catch (caught) {
    //     if (caught instanceof S3ServiceException) {
    //         logger.error(
    //             `Error from S3 while uploading to ${bucket}. ${caught.name}: ${caught.message}`,
    //         );
    //     } else {
    //         logger.error(`Unexpected error during upload:`, caught);
    //     }

    //     throw new Error(`Failed to upload ${filePath} to s3://${bucket}/${key}`);
    // }
}


export function getS3Client(): S3Client {
    if (!client) {
        client = new S3Client({
            region: env.S3_REGION,
            endpoint: env.S3_ENDPOINT,
            credentials: {
                accessKeyId: env.S3_KEY_ID,
                secretAccessKey: env.S3_APPLICATION_KEY,
            },
            forcePathStyle: env.S3_FORCE_PATH_STYLE,
        })
    }

    return client
}