import type { FastifyPluginAsync } from 'fastify';
import { extname } from 'path';
import { nanoid } from 'nanoid';
import type Database from 'better-sqlite3';
import type { Config } from '../../../config.ts';
import type { Logger } from '../../../middleware/logging.ts';
import type { JwtPayload } from '../../../types.ts';
import { createFile, getFilesByUserId, getFileById, deleteFile } from '../../../db/files.ts';
import { saveFile, deleteStoredFile } from '../../../services/storage.ts';
import { requireAuth } from '../../../middleware/auth.ts';

interface Deps {
  db: Database.Database;
  config: Config;
  logger: Logger;
}

export const filesApiRoutes: FastifyPluginAsync<{ deps: Deps }> = async (app, { deps }) => {
  const { db, config } = deps;

  app.get('/', { preHandler: requireAuth }, async (request, reply) => {
    const { sub: userId } = request.user as JwtPayload;
    const files = getFilesByUserId(db, userId);
    reply.send({ files });
  });

  app.post('/', { preHandler: requireAuth }, async (request, reply) => {
    const { sub: userId } = request.user as JwtPayload;
    const data = await request.file();

    if (!data) {
      return reply.status(400).send({ error: 'No file uploaded' });
    }

    const fileBuffer = await data.toBuffer();
    const id = nanoid();
    const ext = extname(data.filename);
    const storedName = `${id}${ext}`;

    await saveFile(config.uploadDir, storedName, fileBuffer);

    const file = createFile(db, {
      id,
      userId,
      originalName: data.filename,
      mimeType: data.mimetype,
      size: fileBuffer.length,
      storedName,
    });

    reply.status(201).send({ file, url: `${config.baseUrl}/f/${id}` });
  });

  app.delete('/:id', { preHandler: requireAuth }, async (request, reply) => {
    const { sub: userId } = request.user as JwtPayload;
    const { id } = request.params as { id: string };

    const file = getFileById(db, id);
    if (!file) {
      return reply.status(404).send({ error: 'File not found' });
    }

    const deleted = deleteFile(db, id, userId);
    if (!deleted) {
      return reply.status(403).send({ error: 'Forbidden' });
    }

    await deleteStoredFile(config.uploadDir, file.stored_name);
    reply.send({ ok: true });
  });
};