import { z } from "zod/v4";

/**
 * Event-driven and scheduled triggers (plan §11.3).
 *
 * Webhook subscriptions ride the existing delivery pipeline
 * (`app_deliveries`: retry + dead-letter). Schedules dispatch into the
 * app's logic (hosted or external) without the developer running a
 * scheduler.
 */

const webhookEventSchema = z
  .string()
  .trim()
  .regex(
    /^[a-z][a-z0-9_]*(\.[a-z][a-z0-9_]*)+$/,
    "Webhook events are dotted lowercase identifiers (e.g. `file.created`).",
  )
  .max(160);

const cronFieldPattern = "[0-9*,/-]+";
const cronExpressionSchema = z
  .string()
  .trim()
  .regex(
    new RegExp(`^${cronFieldPattern}( ${cronFieldPattern}){4}$`),
    "Schedules use 5-field cron expressions.",
  )
  .max(120);

export const appScheduleSchema = z.strictObject({
  id: z
    .string()
    .trim()
    .regex(/^[a-z][a-z0-9-]*$/, "Schedule ids are lowercase kebab-case.")
    .max(120),
  cron: cronExpressionSchema,
  description: z.string().trim().max(500).optional(),
});
export type AppSchedule = z.infer<typeof appScheduleSchema>;

export const appTriggersV2Schema = z
  .strictObject({
    webhooks: z
      .array(z.strictObject({ event: webhookEventSchema }))
      .max(50)
      .default([]),
    schedules: z
      .array(appScheduleSchema)
      .max(20)
      .default([])
      .refine(
        (schedules) => new Set(schedules.map((schedule) => schedule.id)).size === schedules.length,
        "Schedule ids must be unique.",
      ),
  })
  .default({ webhooks: [], schedules: [] });
export type AppTriggersV2 = z.infer<typeof appTriggersV2Schema>;