// Character routes: POST /api/character (create), GET /api/character (profile).
const zod = require('zod');
const { AppError } = require('../utils/errors');
const { requireAuth } = require('../middleware/session');
const { createCharacter, getCharacterProfile } = require('../services/characterService');
const { CLASS_KEYS } = require('../game/classes');

// Validation schemas
const createSchema = zod.strictObject({
  name: zod.string().min(3).max(16).regex(/^[A-Za-z0-9 ']+$/).trim(),
  class: zod.enum(CLASS_KEYS),
});

function wrap(fn) {
  return (req, res, next) => Promise.resolve(fn(req, res, next)).catch(next);
}

async function handleCreate(req, res) {
  const parsed = createSchema.safeParse(req.body);
  if (!parsed.success) {
    throw new AppError('VALIDATION_ERROR', 'Request validation failed.', 400);
  }

  const { name, class: classKey } = parsed.data;
  const userId = req.session.userId;

  const result = createCharacter(userId, name, classKey);

  res.status(201).json({
    ok: true,
    data: { character: { id: result.id, name, class: classKey } },
  });
}

async function handleGet(req, res) {
  const userId = req.session.userId;
  const profile = getCharacterProfile(userId);

  if (!profile) {
    return res.json({ ok: true, data: null });
  }

  res.json({ ok: true, data: profile });
}

module.exports = {
  routes: {
    postCharacter: wrap(handleCreate),
    getCharacter: wrap(handleGet),
  },
};