import {
  getTree,
  nodeHasProperty,
  OntologyNode
} from 'wdk-client/Utils/OntologyUtils';

export type SiteMapOntology = OntologyNode<{}>;

import { ActionThunk } from 'wdk-client/Core/WdkMiddleware';

export type Action =
  | LoadingAction
  | InitializeAction
  | UpdateExpansionAction
  | SetSearchTextAction
  | ErrorAction

//==============================================================================

export const LOADING = 'sitemap/loading';

export type LoadingAction = {
  type: typeof LOADING
}

export function loading(): LoadingAction {
  return {
    type: LOADING
  }
}

//==============================================================================

export const INITIALIZE = 'sitemap/initialize';

export type InitializeAction = {
  type: typeof INITIALIZE,
  payload: {
    tree: SiteMapOntology
  }
}

export function initialize(tree: SiteMapOntology): InitializeAction {
  return {
    type: INITIALIZE,
    payload: {
      tree
    }
  }
}

//==============================================================================

export const UPDATE_EXPANSION = 'sitemap/updateExpansion';

export type UpdateExpansionAction = {
  type: typeof UPDATE_EXPANSION,
  payload: {
    expandedList: string[]
  }
}

export function updateExpansion(expandedList: string[]): UpdateExpansionAction {
  return {
    type: UPDATE_EXPANSION,
    payload: {
      expandedList
    }
  }
}

//==============================================================================

export const SET_SEARCH_TEXT = 'sitemap/set-search-text';

export type SetSearchTextAction = {
  type: typeof SET_SEARCH_TEXT,
  payload: {
    searchText: string
  }
}

export function setSearchText(searchText: string): SetSearchTextAction {
  return {
    type: SET_SEARCH_TEXT,
    payload: {
      searchText
    }
  }
}

//==============================================================================

export const SITEMAP_ERROR = 'sitemap/error';

export type ErrorAction = {
  type: typeof SITEMAP_ERROR,
  payload: {
    error: Error
  }
}

export function sitemapError(error: Error): ErrorAction {
  return {
    type: SITEMAP_ERROR,
    payload: {
      error
    }
  }
}

//==============================================================================

export function loadCurrentSiteMap(): ActionThunk<LoadingAction | ErrorAction | InitializeAction> {
  return function run({ wdkService }) {
    let ontologyPromise = wdkService.getOntology('SiteMap');

    let isQualifying = (node: SiteMapOntology) => {
      return (
        nodeHasProperty('scope', 'record', node) ||
        nodeHasProperty('scope', 'menu', node) ||
        nodeHasProperty('scope', 'webservice', node) ||
        nodeHasProperty('scope', 'gbrowse', node) ||
        nodeHasProperty('targetType', 'track', node)
      );
    }

    return [
      loading(),
      ontologyPromise.then(
        (ontology) => initialize(getTree(ontology, isQualifying)),
        error => sitemapError(error)
      )
    ];
  }
}