import * as nodePath from 'path';
import { readFile } from 'fs/promises';
import mime from 'mime-types';
import { getUpload } from "../../operations/getUpload.js";
export const readUpload = async (c) => {
    const client = c.get('client');
    const uploadsMatch = c.get('pathMatch');
    if (!uploadsMatch) {
        throw new Error('readUpload requires pathMatch to be set');
    }
    const docPath = uploadsMatch[1] || '/';
    const originalFilename = decodeURIComponent(uploadsMatch[2]);
    try {
        const isAuthenticated = c.get('isAuthenticated') || false;
        const revealHidden = c.req.query('reveal') !== undefined;
        // Build options based on authentication and reveal param
        const options = {};
        if (!isAuthenticated) {
            // Unauthenticated users can only see uploads on published documents
            options.published = true;
        }
        else if (revealHidden) {
            // Authenticated users with ?reveal can see hidden uploads
            options.includeHidden = true;
        }
        // Look up the upload by document path and original filename
        const upload = await getUpload(client, { path: docPath }, originalFilename, options);
        if (!upload) {
            return c.html('<h1>404 - Upload Not Found</h1>', 404);
        }
        // Read the actual file from the uploads directory using the system filename
        const uploadsPath = c.get('uploadsPath');
        const filePath = nodePath.join(uploadsPath, upload.filename);
        const fileBuffer = await readFile(filePath);
        // Determine content type from file extension
        const contentType = mime.lookup(originalFilename) || 'application/octet-stream';
        // Encode filename for Content-Disposition header (RFC 5987)
        // Remove non-ASCII characters for fallback, and provide UTF-8 encoded version
        const asciiFilename = originalFilename.replace(/[^\x00-\x7F]/g, '_');
        const encodedFilename = encodeURIComponent(originalFilename);
        return new Response(fileBuffer, {
            headers: {
                'Content-Type': contentType,
                'Content-Disposition': `inline; filename="${asciiFilename}"; filename*=UTF-8''${encodedFilename}`,
            },
        });
    }
    catch (error) {
        if (error.code === 'ENOENT') {
            // File not found on disk - return 404 without logging (common for orphaned records)
            return c.html('<h1>404 - File Not Found</h1>', 404);
        }
        console.error('Upload serving error:', error);
        return c.html('<h1>500 - Internal Server Error</h1>', 500);
    }
};
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