// JSON Schemas for auth payloads — the single source of truth. The backend
// validates requests against these (Fastify), and the payload TS types are
// derived from them via `FromSchema` (see ./types), so there is no drift.

import type { FromSchema } from 'json-schema-to-ts';

// Username: public handle, case-insensitive-unique. Letters/digits/underscore.
const USERNAME_PATTERN = '^[a-zA-Z0-9_]{3,32}$';
// E.164 phone, e.g. +14155552671.
const PHONE_PATTERN = '^\\+[1-9]\\d{1,14}$';

export const registerBodySchema = {
  type: 'object',
  additionalProperties: false,
  required: ['username', 'displayName', 'password'],
  properties: {
    username: { type: 'string', pattern: USERNAME_PATTERN },
    displayName: { type: 'string', minLength: 1, maxLength: 64 },
    password: { type: 'string', minLength: 8, maxLength: 128 },
    email: { type: 'string', format: 'email', maxLength: 254 },
    phone: { type: 'string', pattern: PHONE_PATTERN },
  },
} as const;

export const loginBodySchema = {
  type: 'object',
  additionalProperties: false,
  required: ['username', 'password'],
  properties: {
    username: { type: 'string', pattern: USERNAME_PATTERN },
    password: { type: 'string', minLength: 1, maxLength: 128 },
  },
} as const;

export const refreshBodySchema = {
  type: 'object',
  additionalProperties: false,
  required: ['refreshToken'],
  properties: {
    refreshToken: { type: 'string', minLength: 1 },
  },
} as const;

export const logoutBodySchema = {
  type: 'object',
  additionalProperties: false,
  required: ['refreshToken'],
  properties: {
    refreshToken: { type: 'string', minLength: 1 },
  },
} as const;

export const updateMeBodySchema = {
  type: 'object',
  additionalProperties: false,
  minProperties: 1,
  properties: {
    displayName: { type: 'string', minLength: 1, maxLength: 64 },
    // `null` clears the value; a string sets it.
    email: { type: ['string', 'null'], format: 'email', maxLength: 254 },
    phone: { type: ['string', 'null'], pattern: PHONE_PATTERN },
  },
} as const;

export type RegisterBody = FromSchema<typeof registerBodySchema>;
export type LoginBody = FromSchema<typeof loginBodySchema>;
export type RefreshBody = FromSchema<typeof refreshBodySchema>;
export type LogoutBody = FromSchema<typeof logoutBodySchema>;
export type UpdateMeBody = FromSchema<typeof updateMeBodySchema>;