import { z } from "zod/v4";
import { toolNameSchema } from "./tool";

/**
 * Command palette contributions (plan §11.1).
 *
 * A command is a second door into capabilities the app already declares:
 * run a tool (the host renders an input form from the tool's schema),
 * open a surface, or follow a deep link.
 */

export const commandIdSchema = z
  .string()
  .trim()
  .regex(/^[a-z][a-z0-9-]*$/, "Command ids are lowercase kebab-case.")
  .max(120);

export const appCommandTargetSchema = z.discriminatedUnion("kind", [
  z.object({ kind: z.literal("tool"), tool: toolNameSchema }),
  z.object({ kind: z.literal("surface"), surface: z.literal("home") }),
  z.object({ kind: z.literal("href"), href: z.string().trim().min(1).max(2000) }),
]);
export type AppCommandTarget = z.infer<typeof appCommandTargetSchema>;

export const appCommandSchema = z.strictObject({
  id: commandIdSchema,
  name: z.string().trim().min(1).max(120),
  icon: z.string().trim().max(120).optional(),
  target: appCommandTargetSchema,
});

export type AppCommand = z.infer<typeof appCommandSchema>;