import type { FastifyInstance } from 'fastify';
import { eq } from 'drizzle-orm';
import { getDb, schema } from '../db/index.js';
import { authenticate } from '../utils/auth.js';
import { hasPermission, isMember } from '../utils/permissions.js';
import { PermissionBits } from '@backspace/shared/src/permissions.js';
import { generateSnowflake } from '../utils/snowflake.js';

/** A soundboard is a shortlist of gags, not a media library. */
const MAX_SOUNDS_PER_SPACE = 48;
const MAX_NAME_LENGTH = 32;

export async function soundboardRoutes(app: FastifyInstance): Promise<void> {
  app.get<{ Params: { id: string } }>(
    '/api/spaces/:id/sounds',
    { preHandler: authenticate },
    async (request, reply) => {
      if (!isMember(request.params.id, request.userId)) {
        return reply.code(403).send({ error: 'Not a member of this space', statusCode: 403 });
      }
      const rows = getDb().select().from(schema.soundboardSounds)
        .where(eq(schema.soundboardSounds.spaceId, request.params.id)).all();
      return reply.code(200).send({ sounds: rows });
    },
  );

  app.post<{ Params: { id: string }; Body: { name?: string; filename?: string } }>(
    '/api/spaces/:id/sounds',
    { preHandler: authenticate },
    async (request, reply) => {
      const { id } = request.params;
      // Adding is gated but playing is not: anyone in the call may press a
      // button, only the people who run the space decide what the buttons are.
      if (!hasPermission(request.userId, id, PermissionBits.MANAGE_SPACE)) {
        return reply.code(403).send({ error: 'Missing MANAGE_SPACE permission', statusCode: 403 });
      }

      const name = (request.body?.name ?? '').trim().slice(0, MAX_NAME_LENGTH);
      const filename = (request.body?.filename ?? '').trim();
      if (!name || !filename) {
        return reply.code(400).send({ error: 'name and filename are required', statusCode: 400 });
      }
      // The filename is a key into the upload directory, never a path.
      if (filename.includes('/') || filename.includes('\\') || filename.includes('..')) {
        return reply.code(400).send({ error: 'Invalid filename', statusCode: 400 });
      }

      const db = getDb();
      const count = db.select().from(schema.soundboardSounds)
        .where(eq(schema.soundboardSounds.spaceId, id)).all().length;
      if (count >= MAX_SOUNDS_PER_SPACE) {
        return reply.code(409).send({ error: `At most ${MAX_SOUNDS_PER_SPACE} sounds`, statusCode: 409 });
      }

      const row = {
        id: generateSnowflake(),
        spaceId: id,
        name,
        filename,
        uploaderId: request.userId,
        createdAt: Date.now(),
      };
      db.insert(schema.soundboardSounds).values(row).run();
      return reply.code(201).send(row);
    },
  );

  app.delete<{ Params: { id: string } }>(
    '/api/sounds/:id',
    { preHandler: authenticate },
    async (request, reply) => {
      const db = getDb();
      const sound = db.select().from(schema.soundboardSounds)
        .where(eq(schema.soundboardSounds.id, request.params.id)).get();
      if (!sound) return reply.code(404).send({ error: 'Sound not found', statusCode: 404 });

      if (!hasPermission(request.userId, sound.spaceId, PermissionBits.MANAGE_SPACE)) {
        return reply.code(403).send({ error: 'Missing MANAGE_SPACE permission', statusCode: 403 });
      }

      db.delete(schema.soundboardSounds).where(eq(schema.soundboardSounds.id, request.params.id)).run();
      return reply.code(204).send();
    },
  );
}