import { SurveyJSON5 } from "./json5";
import * as Survey from "survey-knockout";

class TextParserPropery {
  isFound: boolean;
  propertiesCount: number;
  start: number;
  end: number;
  valueStart: number;
  valueEnd: number;
}

export class SurveyTextWorker {
  public static newLineChar: string;
  public errors: Array<any>;
  private surveyValue: Survey.Survey;
  private jsonValue: any;
  private surveyObjects: Array<any>;
  private isSurveyAsPage: boolean;

  constructor(public text: string) {
    if (!this.text || this.text.trim() == "") {
      this.text = "{}";
    }
    this.errors = [];
    this.process();
  }
  public get survey(): Survey.Survey {
    return this.surveyValue;
  }
  public get isJsonCorrect(): boolean {
    return this.surveyValue != null;
  }
  protected process() {
    try {
      this.jsonValue = new SurveyJSON5(1).parse(this.text);
    } catch (error) {
      this.errors.push({
        pos: { start: error.at, end: -1 },
        text: error.message
      });
    }
    if (this.jsonValue != null) {
      this.updateJsonPositions(this.jsonValue);
      this.surveyValue = new Survey.Survey(this.jsonValue);
      this.surveyValue.setDesignMode(true);
      if (this.surveyValue.jsonErrors != null) {
        for (var i = 0; i < this.surveyValue.jsonErrors.length; i++) {
          var error = this.surveyValue.jsonErrors[i];
          this.errors.push({
            pos: { start: error.at, end: -1 },
            text: error.getFullDescription()
          });
        }
      }
    }
    this.surveyObjects = this.createSurveyObjects();
    this.setEditorPositionByChartAt(this.surveyObjects);
    this.setEditorPositionByChartAt(this.errors);
  }
  private updateJsonPositions(jsonObj: any) {
    jsonObj["pos"]["self"] = jsonObj;
    for (var key in jsonObj) {
      var obj = jsonObj[key];
      if (obj && obj["pos"]) {
        jsonObj["pos"][key] = obj["pos"];
        this.updateJsonPositions(obj);
      }
    }
  }
  private createSurveyObjects(): Array<any> {
    var result = [];
    if (this.surveyValue == null) return result;
    this.isSurveyAsPage = false;
    for (var i = 0; i < this.surveyValue.pages.length; i++) {
      var page = this.surveyValue.pages[i];
      if (i == 0 && !page["pos"]) {
        page["pos"] = this.surveyValue["pos"];
        this.isSurveyAsPage = true;
      }
      result.push(page);
      for (var j = 0; j < page.questions.length; j++) {
        result.push(page.questions[j]);
      }
    }
    return result;
  }
  private setEditorPositionByChartAt(objects: any[]) {
    if (objects == null || objects.length == 0) return;
    var position = { row: 0, column: 0 };
    var atObjectsArray = this.getAtArray(objects);
    var startAt: number = 0;
    for (var i = 0; i < atObjectsArray.length; i++) {
      var at = atObjectsArray[i].at;
      position = this.getPostionByChartAt(position, startAt, at);
      var obj = atObjectsArray[i].obj;
      if (!obj.position) obj.position = {};
      if (at == obj.pos.start) {
        obj.position.start = position;
      } else {
        if (at == obj.pos.end) {
          obj.position.end = position;
        }
      }
      startAt = at;
    }
  }
  private getPostionByChartAt(
    startPosition: any,
    startAt: number,
    at: number
  ): any {
    var result = { row: startPosition.row, column: startPosition.column };
    var curChar = startAt;
    while (curChar < at) {
      if (this.text.charAt(curChar) == SurveyTextWorker.newLineChar) {
        result.row++;
        result.column = 0;
      } else {
        result.column++;
      }
      curChar++;
    }
    return result;
  }
  private getAtArray(objects: any[]): any[] {
    var result = [];
    for (var i = 0; i < objects.length; i++) {
      var obj = objects[i];
      var pos = obj.pos;
      if (!pos) continue;
      result.push({ at: pos.start, obj: obj });
      if (pos.end > 0) {
        result.push({ at: pos.end, obj: obj });
      }
    }
    return result.sort((el1, el2) => {
      if (el1.at > el2.at) return 1;
      if (el1.at < el2.at) return -1;
      return 0;
    });
  }
}