import type { APIContext } from 'astro';
import { promises as fs } from 'fs';
import { join } from 'path';
import { randomBytes } from 'crypto';
import { httpResponse } from '../../../utils/response';
import 'dotenv/config'

const uploadDir = process.env.UPLOAD_DIR!;


export async function POST({ request }: APIContext) {
    try {
        const formData = await request.formData();
        const file = formData.get('image');
        
        return await writeImage(file)

    } catch (error) {
        return httpResponse({ error: `Failed to upload image, ${error}` }, 500);
    }
}

async function writeImage(file) {
    if (!file || !(file instanceof File)) {
            return httpResponse({ error: 'No image provided' }, 400);
        }
        
        if (!file.type.match(/^image\/(jpeg|jpg|png)$/)) {
            return httpResponse({ error: 'Only JPG and PNG allowed' }, 400);
        }
        
        const ext = file.name.split('.').pop();
        const filename = `${randomBytes(16).toString('hex')}.${ext}`;
        const filepath = join(uploadDir, filename);
        
        // Save file
        const buffer = Buffer.from(await file.arrayBuffer());
        await fs.writeFile(filepath, buffer);

        return httpResponse({ url: `/api/image/${filename}`}, 201);
}