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

    public formGroup: FormGroup;
    public visibilityRuleContext: VisibilityRulesContext;
    public fieldsPathMemory: any = {};

    public isElementVisible(pathKey: string, id: string) {
        if (!this.fieldsPathMemory[id] && pathKey) this.fieldsPathMemory[id] = pathKey;
        let visibilityRule = this.visibilityRuleContext.getRulesFromKey(id);
        if (!visibilityRule) return true;
        if (this.checkElementVisibility(visibilityRule)) {
            return true
        } else {
            this.clearValues(pathKey)
           // if (pathKey && this.formGroup.get(pathKey + '.value')) this.formGroup.get(pathKey + '.value').patchValue(null)
            return false;
        }
    }

    public checkElementVisibility(visibilityRule: VisibilityRule): boolean {
        let sourceVisibilityRules = visibilityRule.sourceVisibilityRules;
        for (let i = 0; i < sourceVisibilityRules.length; i++) {
            let sourceVisibilityRule = sourceVisibilityRules[i];
            if (!this.formGroup.get(this.fieldsPathMemory[sourceVisibilityRule.sourceControlId] + '.value')) return false; //TODO
            if (sourceVisibilityRule.sourceControlValue != '' + this.formGroup.get(this.fieldsPathMemory[sourceVisibilityRule.sourceControlId] + '.value').value) return false;
        }
        return true;
    }

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

    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);
        }            
                
    }
}