import { promises as fs } from 'node:fs';

import { rootDir } from '../../paths.ts';

import { getLocale } from '~~/server/data.ts';

export default defineEventHandler(async (event) => {
    const filename = getRouterParam(event, 'filename');
    if (!filename || filename.includes('..')) {
        throw createError({
            status: 400,
            statusMessage: 'Bad Request',
        });
    }

    const path = `${rootDir}/locale/${getLocale(event)}/docs/${filename}`;

    try {
        await fs.access(path);
        if (filename.endsWith('.json')) {
            event.node.res.setHeader('Content-Type', 'application/json');
        }
        event.node.res.setHeader('Cache-Control', 'public, max-age=86400');
        return await fs.readFile(path);
    } catch (err) {
        throw createError({
            statusCode: 404,
            statusMessage: 'Not Found',
        });
    }
});