/*-
 * ============LICENSE_START=======================================================
 * SDC
 * ================================================================================
 * Copyright (C) 2019 Nokia. All rights reserved.
 * ================================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ============LICENSE_END=========================================================
 */

import {Component, Input, ViewEncapsulation} from "@angular/core";
import {GabService, IServerResponse} from "../../../services/gab.service";
import {PathsAndNamesDefinition} from "../../../../models/paths-and-names";

const COLUMN_PREFIX: string = 'col';

@Component({
  selector: 'gab',
  templateUrl: './generic-artifact-browser.component.html',
  styleUrls: ['./generic-artifact-browser.component.less'],
  encapsulation: ViewEncapsulation.None
})
export class GenericArtifactBrowserComponent {
  @Input()
  pathsandnames: PathsAndNamesDefinition[];
  @Input()
  artifactid: string;
  @Input()
  resourceid: string;

  columns: ColumnDefinition[];
  originColumns: ColumnDefinition[];
  rows: any[];
  originRows: any[];
  isLoading: boolean;
  ready: boolean;
  columnsFilters: Map<string, string>;
  addNewColumn: boolean;

  constructor(private gabService: GabService) {
  }

  ngOnInit() {
    this.ready = false;
    this.isLoading = true;
    this.columns = [];
    this.loadArtifacts();
  }

  loadArtifacts() {
    this.addNewColumn = false;
    this.columnsFilters = new Map<string, string>();
    let paths: string[] = this.pathsandnames.map(item => item.path);
    this.gabService.getArtifact(this.artifactid, this.resourceid, paths)
    .subscribe(
        response => {
          // let typedServerResponse: IServerResponse = response.json() as IServerResponse;
          this.normalizeDataForNgxDatatable(response['data']);
        },
        () => {
            this.ready = false;
            this.isLoading = false;
        },
        () => {
          this.ready = true;
          this.isLoading = false;
        }
    );
  }

  refresh() {
    this.loadArtifacts();
  }

  canBeDeleted(name: string){
    return this.originColumns.filter(function(column){
      return column.name === name;
    }).length === 0;
  }

  deleteColumn(col: ColumnDefinition) {
    this.pathsandnames = this.pathsandnames.filter(function(pathandname){
      return pathandname.friendlyName != col.name;
    });
    this.columns = this.columns.filter(function(column){
      return column != col;
    })
  }

  hideAddNewColumn() {
    this.addNewColumn = false;
  }

  showAddNewColumn() {
    this.addNewColumn = true;
  }

  isSearchable(columnName){
    let selectedPathAndName = this.pathsandnames.filter(function(pathandname){
      return pathandname.friendlyName === columnName;
    })[0];
    return selectedPathAndName.searchable;
  }

  updateColumnFilter(event, column) {
    const val = event.target.value.toLowerCase();
    this.columnsFilters.set(column, val);
    let temp_rows = [...this.originRows];

    this.columnsFilters.forEach((value: string, key: string) => {
      temp_rows = this.updateSingleColumnFilter(value, key, temp_rows);
    });

    // update the rows
    this.rows = temp_rows
  }

  private updateSingleColumnFilter(value, column, rows) {
    return rows.filter(function (obj) {
      const row = obj[column];
      return row !== undefined && row.toLowerCase().indexOf(value) !== -1 || !value;
    });
  }

  private normalizeDataForNgxDatatable(data: [{ [key: string]: string }]) {
    let result: NormalizationResult = this.getNormalizationResult(data, this.pathsandnames);
    this.rows = result.rows;
    this.originRows = result.rows;
    this.columns = result.columns;
    if (!this.originColumns){
      this.originColumns = [...result.columns];
    }
  }

  private getNormalizationResult(data: [{ [key: string]: string }],
                                 pathsAndNames: PathsAndNamesDefinition[]): NormalizationResult {
    //Prepare column names and column data property names
    let mappingsPathToProp = new Map<string, string>();
    let columnsDefinitions = this.normalizeColumns(pathsAndNames, mappingsPathToProp);

    //Convert rows from { "string": "string" } to { prop : "string" } format
    //This is required by NgxDatatable component
    let arrayOfRows = this.normalizeRows(data, mappingsPathToProp);

    return new NormalizationResult(arrayOfRows, columnsDefinitions);
  }

  private normalizeColumns(pathsAndNames: PathsAndNamesDefinition[], mappingsPathToProp: Map<string, string>) {
    let columnsDefinitions: ColumnDefinition[] = [];
    let index: number = 1;

    pathsAndNames.forEach(function (col) {
      let columnDataPropertyName: string = COLUMN_PREFIX + index;
      mappingsPathToProp.set(col.path, columnDataPropertyName);
      let cell: ColumnDefinition = new ColumnDefinition(col.friendlyName, columnDataPropertyName);
      columnsDefinitions.push(cell);
      index += 1;
    });
    return columnsDefinitions;
  }

  private normalizeRows(data: [{ [key: string]: string }], mappingsPathToProp: Map<string, string>) {
    let arrayOfRows = [];
    data.forEach(function (col) {
      let row = {};
      for (let key in col) {
        if (col.hasOwnProperty(key)) {
          let columnNameAsProp = mappingsPathToProp.get(key);
          row[columnNameAsProp] = col[key];
        }
      }
      arrayOfRows.push(row);
    });

    return arrayOfRows;
  }
}

class NormalizationResult {
  constructor(public rows: any[], public columns: ColumnDefinition[]) {
  }
}

export class ColumnDefinition {
  constructor(public name: string, public prop: string) {
  }
}