chore: pick the default store region (#7369)

* chore: pick the default store region

* chore: fix test

* chore: remove from defaults workflow and move to seeds

* chore: undo payment provider change

* chore: rearrange conditionals

packages/core/core-flows/src/definition/cart/steps/find-one-or-any-region.ts

@@ -1,5 +1,5 @@
 import { ModuleRegistrationName } from "@medusajs/modules-sdk"
-import { IRegionModuleService } from "@medusajs/types"
+import { IRegionModuleService, IStoreModuleService } from "@medusajs/types"
 import { MedusaError } from "@medusajs/utils"
 import { StepResponse, createStep } from "@medusajs/workflows-sdk"
 
@@ -11,21 +11,29 @@ export const findOneOrAnyRegionStep = createStep(
       ModuleRegistrationName.REGION
     )
 
-    if (!data.regionId) {
-      // TODO: Pick up the default store region if none is provided
-      const regions = await service.list({})
+    const storeModule = container.resolve<IStoreModuleService>(
+      ModuleRegistrationName.STORE
+    )
 
-      if (!regions?.length) {
-        throw new MedusaError(
-          MedusaError.Types.INVALID_DATA,
-          "No regions found"
-        )
-      }
+    if (data.regionId) {
+      const region = await service.retrieve(data.regionId)
 
-      return new StepResponse(regions[0])
+      return new StepResponse(region)
     }
 
-    const region = await service.retrieve(data.regionId)
+    const [store] = await storeModule.list()
+
+    if (!store) {
+      throw new MedusaError(MedusaError.Types.NOT_FOUND, "Store not found")
+    }
+
+    const [region] = await service.list({
+      id: store.default_region_id,
+    })
+
+    if (!region) {
+      throw new MedusaError(MedusaError.Types.INVALID_DATA, "No regions found")
+    }
 
     return new StepResponse(region)
   }