import _ from "lodash";

import config from "app/core/config";
import { coreModule, appEvents } from "app/core/core";

var datasourceTypes = [];

var defaults = {
  name: "",
  type: "graphite",
  url: "",
  access: "proxy",
  jsonData: {},
  secureJsonFields: {}
};

var datasourceCreated = false;

export class DataSourceEditCtrl {
  isNew: boolean;
  datasources: any[];
  current: any;
  types: any;
  testing: any;
  datasourceMeta: any;
  tabIndex: number;
  hasDashboards: boolean;
  editForm: any;
  gettingStarted: boolean;
  navModel: any;

  /** @ngInject */
  constructor(
    private $q,
    private backendSrv,
    private $routeParams,
    private $location,
    private datasourceSrv,
    navModelSrv
  ) {
    this.navModel = navModelSrv.getNav("cfg", "datasources", 0);
    this.datasources = [];
    this.tabIndex = 0;

    this.loadDatasourceTypes().then(() => {
      if (this.$routeParams.id) {
        this.getDatasourceById(this.$routeParams.id);
      } else {
        this.initNewDatasourceModel();
      }
    });
  }

  initNewDatasourceModel() {
    this.isNew = true;
    this.current = _.cloneDeep(defaults);

    this.navModel.breadcrumbs.push({ text: "New" });

    // We are coming from getting started
    if (this.$location.search().gettingstarted) {
      this.gettingStarted = true;
      this.current.isDefault = true;
    }

    this.typeChanged();
  }

  loadDatasourceTypes() {
    if (datasourceTypes.length > 0) {
      this.types = datasourceTypes;
      return this.$q.when(null);
    }

    return this.backendSrv
      .get("/api/plugins", { enabled: 1, type: "datasource" })
      .then(plugins => {
        datasourceTypes = plugins;
        this.types = plugins;
      });
  }

  getDatasourceById(id) {
    this.backendSrv.get("/api/datasources/" + id).then(ds => {
      this.isNew = false;
      this.current = ds;
      this.navModel.node = {
        text: ds.name,
        icon: "icon-gf icon-gf-fw icon-gf-datasources",
        id: "ds-new"
      };
      this.navModel.breadcrumbs.push(this.navModel.node);

      if (datasourceCreated) {
        datasourceCreated = false;
        this.testDatasource();
      }

      return this.typeChanged();
    });
  }

  userChangedType() {
    // reset model but keep name & default flag
    this.current = _.defaults(
      {
        id: this.current.id,
        name: this.current.name,
        isDefault: this.current.isDefault,
        type: this.current.type
      },
      _.cloneDeep(defaults)
    );
    this.typeChanged();
  }

  typeChanged() {
    this.hasDashboards = false;
    return this.backendSrv
      .get("/api/plugins/" + this.current.type + "/settings")
      .then(pluginInfo => {
        this.datasourceMeta = pluginInfo;
        this.hasDashboards =
          _.find(pluginInfo.includes, { type: "dashboard" }) !== undefined;
      });
  }

  updateFrontendSettings() {
    return this.backendSrv.get("/api/frontend/settings").then(settings => {
      config.datasources = settings.datasources;
      config.defaultDatasource = settings.defaultDatasource;
      this.datasourceSrv.init();
    });
  }

  testDatasource() {
    this.datasourceSrv.get(this.current.name).then(datasource => {
      if (!datasource.testDatasource) {
        return;
      }

      this.testing = { done: false, status: "error" };

      // make test call in no backend cache context
      this.backendSrv
        .withNoBackendCache(() => {
          return datasource
            .testDatasource()
            .then(result => {
              this.testing.message = result.message;
              this.testing.status = result.status;
            })
            .catch(err => {
              if (err.statusText) {
                this.testing.message = "HTTP Error " + err.statusText;
              } else {
                this.testing.message = err.message;
              }
            });
        })
        .finally(() => {
          this.testing.done = true;
        });
    });
  }

  saveChanges() {
    if (!this.editForm.$valid) {
      return;
    }

    if (this.current.readOnly) {
      return;
    }

    if (this.current.id) {
      return this.backendSrv
        .put("/api/datasources/" + this.current.id, this.current)
        .then(result => {
          this.current = result.datasource;
          this.updateFrontendSettings().then(() => {
            this.testDatasource();
          });
        });
    } else {
      return this.backendSrv
        .post("/api/datasources", this.current)
        .then(result => {
          this.current = result.datasource;
          this.updateFrontendSettings();

          datasourceCreated = true;
          this.$location.path("datasources/edit/" + result.id);
        });
    }
  }

  confirmDelete() {
    this.backendSrv.delete("/api/datasources/" + this.current.id).then(() => {
      this.$location.path("datasources");
    });
  }

  delete(s) {
    appEvents.emit("confirm-modal", {
      title: "Delete",
      text: "Are you sure you want to delete this datasource?",
      yesText: "Delete",
      icon: "fa-trash",
      onConfirm: () => {
        this.confirmDelete();
      }
    });
  }
}

coreModule.controller("DataSourceEditCtrl", DataSourceEditCtrl);

coreModule.directive("datasourceHttpSettings", function() {
  return {
    scope: {
      current: "=",
      suggestUrl: "@"
    },
    templateUrl: "public/app/features/plugins/partials/ds_http_settings.html",
    link: {
      pre: function($scope, elem, attrs) {
        $scope.getSuggestUrls = function() {
          return [$scope.suggestUrl];
        };
      }
    }
  };
});