import { join } from "lodash"
import { permission } from "../authApi/permissions"
import { appDefinitionFile } from "../common"
import { validateAll } from "./validate"
import { apiWrapper } from "../common/apiWrapper"
import { events } from "../common/events"

export const saveApplicationHierarchy = app => async hierarchy =>
  apiWrapper(
    app,
    events.templateApi.saveApplicationHierarchy,
    permission.writeTemplates.isAuthorized,
    { hierarchy },
    _saveApplicationHierarchy,
    app.datastore,
    hierarchy
  )

export const _saveApplicationHierarchy = async (datastore, hierarchy) => {
  const validationErrors = await validateAll(hierarchy)
  if (validationErrors.length > 0) {
    throw new Error(
      `Hierarchy is invalid: ${join(
        validationErrors.map(
          e => `${e.item.nodeKey ? e.item.nodeKey() : ""} : ${e.error}`
        ),
        ","
      )}`
    )
  }

  if (await datastore.exists(appDefinitionFile)) {
    const appDefinition = await datastore.loadJson(appDefinitionFile)
    appDefinition.hierarchy = hierarchy
    await datastore.updateJson(appDefinitionFile, appDefinition)
  } else {
    await datastore.createFolder("/.config")
    const appDefinition = { actions: [], triggers: [], hierarchy }
    await datastore.createJson(appDefinitionFile, appDefinition)
  }
}