/**
 * Projects Routes – CRUD for projects
 */
import type { FastifyInstance } from 'fastify';
import type { DatabaseInterface, DBProject } from '../database/DatabaseInterface.js';
import { requireAuth } from '../auth/authMiddleware.js';
import type { AuthService } from '../auth/AuthService.js';
import { validateName, validateIdParam } from '../utils/validation.js';

export function registerProjectRoutes(fastify: FastifyInstance, db: DatabaseInterface, authService: AuthService) {
  // List projects owned by the authenticated user
  fastify.get('/api/projects', async (request, reply) => {
    const user = requireAuth(request, reply, authService);
    if (!user) return;
    return db.listProjects(user.id);
  });

  // Get single project
  fastify.get('/api/projects/:id', async (request, reply) => {
    if (!requireAuth(request, reply, authService)) return;
    const { id } = request.params as { id: string };
    const idErr = validateIdParam(id, 'id');
    if (idErr) return reply.code(400).send({ error: idErr });
    const project = db.getProject(id);
    if (!project) return reply.code(404).send({ error: 'Project not found' });
    return project;
  });

  // Create project
  fastify.post('/api/projects', async (request, reply) => {
    const user = requireAuth(request, reply, authService);
    if (!user) return;
    const body = request.body as Partial<DBProject>;
    const nameErr = validateName(body.name);
    if (nameErr) return reply.code(400).send({ error: nameErr });
    return reply.code(201).send(db.createProject({ ...body, owner_id: user.id }));
  });

  // Update project
  fastify.patch('/api/projects/:id', async (request, reply) => {
    if (!requireAuth(request, reply, authService)) return;
    const { id } = request.params as { id: string };
    const idErr = validateIdParam(id, 'id');
    if (idErr) return reply.code(400).send({ error: idErr });
    const body = request.body as Partial<DBProject>;
    if (body.name !== undefined) {
      const nameErr = validateName(body.name);
      if (nameErr) return reply.code(400).send({ error: nameErr });
    }
    const updated = db.updateProject(id, body);
    if (!updated) return reply.code(404).send({ error: 'Project not found' });
    return updated;
  });

  // Delete project
  fastify.delete('/api/projects/:id', async (request, reply) => {
    if (!requireAuth(request, reply, authService)) return;
    const { id } = request.params as { id: string };
    const idErr = validateIdParam(id, 'id');
    if (idErr) return reply.code(400).send({ error: idErr });
    const ok = db.deleteProject(id);
    if (!ok) return reply.code(404).send({ error: 'Project not found' });
    return reply.code(204).send();
  });
}