import { VisibilityRule } from './models/VisibilityRule';
import { VisibilityRulesContext } from './models/VisibilityRulesContext';
import { FormGroup } from '@angular/forms';
import { Injectable, ApplicationRef, NgZone } from '@angular/core';
import { Rule } from '../../models/Rule';
import { DatasetProfileDefinitionModel } from '../../models/DatasetProfileDefinitionModel';
import { JsonSerializer } from '../JsonSerializer';
@Injectable()
export class VisibilityRulesService {

  public formGroup: FormGroup;
  public visibilityRuleContext: VisibilityRulesContext;
  public fieldsPathMemory: any = {};
  private elementVisibilityMap = new Map<String, boolean>();
  private initialModel: DatasetProfileDefinitionModel;
  private currentModel: DatasetProfileDefinitionModel;

  constructor(public applicationReference: ApplicationRef, public ngZone: NgZone) {

  }

  public setModel(model: DatasetProfileDefinitionModel) {
    this.initialModel = JsonSerializer.fromJSONObject(model, DatasetProfileDefinitionModel);
    this.currentModel = model
    this.visibilityRuleContext.rules.forEach(item => this.evaluateVisibility(item))

  }

  public getFormGroup(id: string): FormGroup {
    let pathKeyArray = this.search("pages", this.initialModel.pages, id).split(".")

    pathKeyArray.pop();
    let pathKey = pathKeyArray.join(".");
    if (!this.fieldsPathMemory[id] && pathKey) this.fieldsPathMemory[id] = pathKey;
    return (<FormGroup>this.formGroup.get(pathKey));
  }

  public checkElementVisibility(id: string): boolean {
    if (!this.elementVisibilityMap.has(id) || this.elementVisibilityMap.get(id)) return true;
    else return false;
  }

  public buildVisibilityRules(item: Array<Rule>) {
    this.visibilityRuleContext = new VisibilityRulesContext();
    this.visibilityRuleContext.buildVisibilityRuleContext(item);
  }

  public updateValueAndVisibility(id: string) {
    let visibilityRules = this.visibilityRuleContext.rules.filter(item => item.sourceVisibilityRules.filter(source => source.sourceControlId === id).length > 0);
    visibilityRules.forEach(item => this.evaluateVisibility(item))
  }

  private evaluateVisibility(visibilityRule: VisibilityRule) {
    for (let i = 0; i < visibilityRule.sourceVisibilityRules.length; i++) {
      let pathKey = this.fieldsPathMemory[visibilityRule.sourceVisibilityRules[i].sourceControlId];
      if (this.formGroup.get(pathKey + '.value') && ((this.formGroup.get(pathKey + '.value').value == null || this.formGroup.get(pathKey + '.value').value == undefined) || "" + this.formGroup.get(pathKey + '.value').value != "" + visibilityRule.sourceVisibilityRules[i].sourceControlValue)) {
        if (this.formGroup.get(pathKey).parent.get("id")) {
          if (!this.checkElementVisibility(this.formGroup.get(pathKey).parent.get("id").value)) {
            let targetPathKey = this.fieldsPathMemory[visibilityRule.targetControlId]
            this.getObject(this.currentModel, "id", visibilityRule.targetControlId, this.currentModel, true)
            this.elementVisibilityMap.set(visibilityRule.targetControlId, false)
            this.clearValues(targetPathKey)
            return;
          }
        }
        else {
          let targetPathKey = this.fieldsPathMemory[visibilityRule.targetControlId]
          this.getObject(this.currentModel, "id", visibilityRule.targetControlId, this.currentModel, true)
          this.elementVisibilityMap.set(visibilityRule.targetControlId, false)
          this.clearValues(targetPathKey)
          return;
        }
      }
    }
    let obj = this.getObject(this.initialModel, "id", visibilityRule.targetControlId, this.initialModel)
    let targetObjPathKey = this.fieldsPathMemory[visibilityRule.targetControlId] ? this.fieldsPathMemory[visibilityRule.targetControlId] : this.search("pages", this.initialModel.pages, obj);
    this.updateValue(this.currentModel, obj, targetObjPathKey)
    this.elementVisibilityMap.set(visibilityRule.targetControlId, true)
  }

  private getParentPath(parentId: string): string {
    return '';
  }

  private clearValues(pathKey) {
    if (pathKey && this.formGroup.get(pathKey + '.value')) this.formGroup.get(pathKey + '.value').patchValue(null)
    if (pathKey && this.formGroup.get(pathKey)["controls"].fields) {
      for (var i = 0; i < this.formGroup.get(pathKey)["controls"].fields.length; i++)
        this.clearValues(pathKey + '.fields.' + i);
    }
  }

  // deleteFromModel(path: string, obj: any) {
  //   if (!path) return
  //   const _obj = JSON.parse(JSON.stringify(obj));
  //   const keys = path.split('.');

  //   keys.reduce((acc, key, index) => {
  //     if (index === keys.length - 1) {
  //       delete acc[key];
  //       return true;
  //     }
  //     return acc[key];
  //   }, _obj);
  //   return _obj;
  // }

  updateValue(obj, value, path) {
    var i;
    if (value['id'].targetControlId === "other216a") debugger;
    path = path.split('.');
    for (i = 0; i < path.length - 1; i++)
      obj = obj[path[i]];

    for (let propIndex = 0; propIndex < obj.length; propIndex++) {
      if (obj[propIndex]["id"] === value["id"]) return
    }
    obj.splice(path[i], 0, value);
  }

  search(path, obj, target) {
    for (var k in obj) {
      if (obj.hasOwnProperty(k))
        if (obj[k] === target)
          return path + "." + k
        else if (typeof obj[k] === "object") {
          var result = this.search(path + "." + k, obj[k], target);
          if (result)
            return result;
        }
    }
    return false;
  }

  private getObject(obj, key, val, parent, deleteObj = false) {
    for (var i in obj) {
      if (!obj.hasOwnProperty(i)) continue;
      if (typeof obj[i] == 'object') {
        let returnObj = this.getObject(obj[i], key, val, obj, deleteObj);
        if (returnObj) return returnObj
      } else if (i == key && obj[key] == val) {
        //console.log(obj[key])
        if (deleteObj) parent.splice(parent.indexOf(obj), 1);
        return obj
      }
    }
  }
}