import type {ExtensionTarget as AdminExtensionTarget} from '@shopify/ui-extensions/admin';
import type {ExtensionTarget as CheckoutExtensionTarget} from '@shopify/ui-extensions/checkout';
import type {ExtensionTarget as CustomerAccountExtensionTarget} from '@shopify/ui-extensions/customer-account';
import type {ExtensionTarget as PosExtensionTarget} from '@shopify/ui-extensions/point-of-sale';
import type {AnyExtensionTarget, ApiForTarget} from '../targets';
import {
  isCheckoutTarget,
  isCustomerAccountTarget,
  isPosTarget,
  isAdminTarget,
} from '../targets';
import {createMockCheckoutTargetApi} from '../checkout/factories';
import {createMockCustomerAccountTargetApi} from '../customer-account/factories';
import {createMockPosTargetApi} from '../point-of-sale/factories';
import {
  createMockAdminTargetApi,
  type ApiForAdminExtension,
} from '../admin/factories';

/**
 * Returns the default mock API values for a given target.
 */
export function createMockTargetApi<T extends AdminExtensionTarget>(
  target: T,
): ApiForAdminExtension<T>;
export function createMockTargetApi<T extends CheckoutExtensionTarget>(
  target: T,
): ApiForTarget<T>;
export function createMockTargetApi<T extends CustomerAccountExtensionTarget>(
  target: T,
): ApiForTarget<T>;
export function createMockTargetApi<T extends PosExtensionTarget>(
  target: T,
): ApiForTarget<T>;
export function createMockTargetApi(target: AnyExtensionTarget): never;
export function createMockTargetApi(target: AnyExtensionTarget): object {
  let api: object;
  if (isCheckoutTarget(target)) {
    api = createMockCheckoutTargetApi(target);
  } else if (isPosTarget(target)) {
    api = createMockPosTargetApi(target);
  } else if (isCustomerAccountTarget(target)) {
    api = createMockCustomerAccountTargetApi(target);
  } else if (isAdminTarget(target)) {
    api = createMockAdminTargetApi(target);
  } else {
    throw new Error(
      `Unsupported target: "${target}". No mock factory is available for this target.`,
    );
  }

  // `@shopify/ui-extensions/preact` calls `shopify.setSignals()` as a
  // side-effect when imported.  Include a no-op so the proxy doesn't
  // reject the access.
  return Object.assign(api, {setSignals() {}});
}