import {Component, OnDestroy, OnInit, ViewChild} from '@angular/core';
import {ActivatedRoute, Router} from '@angular/router';
import {Title} from '@angular/platform-browser';
import {EnvProperties} from '../openaireLibrary/utils/properties/env-properties';
import {Category, Stakeholder, SubCategory, Topic} from "../utils/entities/stakeholder";
import {StakeholderService} from "../services/stakeholder.service";
import {HelperFunctions} from "../openaireLibrary/utils/HelperFunctions.class";
import {AlertModal} from "../openaireLibrary/utils/modal/alert";
import {Subscriber, Subscription} from "rxjs";
import {FormBuilder, FormGroup, Validators} from "@angular/forms";
import {StakeholderUtils} from "../utils/indicator-utils";
import {StringUtils} from "../openaireLibrary/utils/string-utils.class";

declare var UIkit;

@Component({
  selector: 'topic',
  templateUrl: './topic.component.html',
})
export class TopicComponent implements OnInit, OnDestroy {
  public subscriptions: any[] = [];
  public properties: EnvProperties;
  public stakeholderUtils: StakeholderUtils = new StakeholderUtils();
  public loading: boolean = true;
  public stakeholder: Stakeholder;
  /**
   * Current topic
   **/
  public topicIndex: number = 0;
  /**
   * categoryIndex: Current category to be edited, selectedCategoryIndex: selected on menu(opened)
   */
  public categoryIndex: number = 0;
  public selectedCategoryIndex: number = 0;
  /**
   * Current Subcategory to be edited
   */
  public subCategoryIndex: number = 0;
  /**
   * Current element and index of topic, category or subcategory to be deleted.
   */
  public form: FormGroup;
  public element: Topic | Category | SubCategory;
  public type: 'topic' | 'category' | 'subcategory' = "topic";
  public index: number = -1;
  /**
   * Check form validity
   */
  public toggle: boolean = false;
  
  @ViewChild('deleteModal') deleteModal: AlertModal;
  @ViewChild('editModal') editModal: AlertModal;
  
  constructor(
    private route: ActivatedRoute,
    private router: Router,
    private title: Title,
    private fb: FormBuilder,
    private stakeholderService: StakeholderService) {
  }
  
  public ngOnInit() {
    this.route.data
      .subscribe((data: { envSpecific: EnvProperties }) => {
        this.properties = data.envSpecific;
        let subscription: Subscription;
        this.route.params.subscribe(params => {
          if (subscription) {
            subscription.unsubscribe();
          }
          subscription = this.stakeholderService.getStakeholderAsObservable().subscribe(stakeholder => {
            if (stakeholder) {
              this.stakeholder = HelperFunctions.copy(stakeholder);
              this.topicIndex = this.stakeholder.topics.findIndex(topic => topic.alias === params['topic']);
              if (this.topicIndex === -1) {
                this.navigateToError();
              } else {
                this.title.setTitle(stakeholder.index_shortName + ' | ' + this.stakeholder.topics[this.topicIndex].name);
                this.toggle = true;
              }
            }
          });
          this.subscriptions.push(subscription);
        });
      });
  }
  
  public ngOnDestroy() {
    this.subscriptions.forEach(value => {
      if (value instanceof Subscriber) {
        value.unsubscribe();
      }
    });
  }
  
  public saveElement() {
    if (this.type === "topic") {
      this.saveTopic();
    } else if (this.type === "category") {
      this.saveCategory();
    } else {
      this.saveSubCategory();
    }
  }
  
  public deleteElement() {
    if (this.type === "topic") {
      this.deleteTopic();
    } else if (this.type === "category") {
      this.deleteCategory();
    } else {
      this.deleteSubcategory();
    }
  }
  
  private buildTopic(topic: Topic) {
    let topics = this.stakeholder.topics.filter(element => element._id !== topic._id);
    this.form = this.fb.group({
      _id: this.fb.control(topic._id),
      name: this.fb.control(topic.name, Validators.required),
      description: this.fb.control(topic.description),
      alias: this.fb.control(topic.alias, [
          Validators.required,
          this.stakeholderUtils.aliasValidator(topics)
        ]
      ),
      isActive: this.fb.control(topic.isActive),
      isPublic: this.fb.control(topic.isPublic),
      isDefault: this.fb.control(topic.isDefault),
      categories: this.fb.control(topic.categories)
    });
    this.subscriptions.push(this.form.get('name').valueChanges.subscribe(value => {
      let i = 1;
      value = this.stakeholderUtils.generateAlias(value);
      this.form.controls['alias'].setValue(value);
      while (this.form.get('alias').invalid) {
        this.form.controls['alias'].setValue(value + i);
        i++;
      }
    }));
  }
  
  public editTopicOpen() {
    this.index = this.topicIndex;
    this.type = 'topic';
    this.buildTopic(this.stakeholder.topics[this.index]);
    this.editOpen();
  }
  
  public saveTopic() {
    if (!this.form.invalid) {
      let path = [this.stakeholder._id];
      let callback = (topic: Topic): void => {
        this.stakeholder.topics[this.index] = topic;
        this.stakeholderService.setStakeholder(this.stakeholder);
      };
      this.save('Topic has been successfully saved', path, this.form.value, callback, true);
    }
  }
  
  public toggleTopicStatus() {
    this.index = this.topicIndex;
    this.type = 'topic';
    let path = [
      this.stakeholder._id,
      this.stakeholder.topics[this.topicIndex]._id
    ];
    this.toggleStatus(this.stakeholder.topics[this.topicIndex], path);
  }
  
  public toggleTopicAccess() {
    this.index = this.topicIndex;
    this.type = 'topic';
    let path = [
      this.stakeholder._id,
      this.stakeholder.topics[this.topicIndex]._id
    ];
    this.toggleAccess(this.stakeholder.topics[this.topicIndex], path);
  }
  
  public deleteTopicOpen() {
    this.type = 'topic';
    this.index = this.topicIndex;
    this.element = this.stakeholder.topics[this.index];
    this.deleteOpen();
  }
  
  public deleteTopic() {
    let path: string[] = [
      this.stakeholder._id,
      this.stakeholder.topics[this.index]._id
    ];
    let callback = (): void => {
      this.stakeholder.topics.splice(this.index, 1);
      this.stakeholderService.setStakeholder(this.stakeholder);
    };
    this.delete('Topic has been successfully be deleted', path, callback, true);
  }
  
  public toggleCategory(index: number) {
    if (this.selectedCategoryIndex !== index) {
      this.selectedCategoryIndex = index;
      this.toggle = true;
    } else {
      this.toggle = !this.toggle;
    }
  }
  
  private buildCategory(category: Category) {
    let categories = this.stakeholder.topics[this.topicIndex].categories.filter(element => element._id !== category._id);
    this.form = this.fb.group({
      _id: this.fb.control(category._id),
      name: this.fb.control(category.name, Validators.required),
      description: this.fb.control(category.description),
      alias: this.fb.control(category.alias, [
          Validators.required,
          this.stakeholderUtils.aliasValidator(categories)
        ]
      ),
      isActive: this.fb.control(category.isActive),
      isPublic: this.fb.control(category.isPublic),
      isDefault: this.fb.control(category.isDefault),
      subCategories: this.fb.control(category.subCategories)
    });
    this.subscriptions.push(this.form.get('name').valueChanges.subscribe(value => {
      let i = 1;
      value = this.stakeholderUtils.generateAlias(value);
      this.form.controls['alias'].setValue(value);
      while (this.form.get('alias').invalid) {
        this.form.controls['alias'].setValue(value + i);
        i++;
      }
    }));
  }
  
  public editCategoryOpen(index: number = -1) {
    this.index = index;
    this.type = 'category';
    if (index === -1) {
      this.buildCategory(new Category(null, null, null, true, true));
    } else {
      this.buildCategory(this.stakeholder.topics[this.topicIndex].categories[index]);
    }
    this.editOpen();
  }
  
  public saveCategory() {
    if (!this.form.invalid) {
      let path = [this.stakeholder._id, this.stakeholder.topics[this.topicIndex]._id];
      let callback = (category: Category): void => {
        if (this.index === -1) {
          this.stakeholder.topics[this.topicIndex].categories.push(category);
        } else {
          this.stakeholder.topics[this.topicIndex].categories[this.index] = HelperFunctions.copy(category);
        }
        this.stakeholderService.setStakeholder(this.stakeholder);
      };
      if (this.index === -1) {
        this.save('Category has been successfully created', path, this.form.value, callback);
      } else {
        this.save('Category has been successfully saved', path, this.form.value, callback);
      }
    }
  }
  
  public toggleCategoryStatus(index: number) {
    this.index = index;
    this.type = 'category';
    let path = [
      this.stakeholder._id,
      this.stakeholder.topics[this.topicIndex]._id,
      this.stakeholder.topics[this.topicIndex].categories[this.index]._id
    ];
    this.toggleStatus(this.stakeholder.topics[this.topicIndex].categories[this.index], path);
  }
  
  public toggleCategoryAccess(index: number) {
      this.index = index;
      this.type = 'category';
      let path = [
          this.stakeholder._id,
          this.stakeholder.topics[this.topicIndex]._id,
          this.stakeholder.topics[this.topicIndex].categories[this.index]._id
      ];
      this.toggleAccess(this.stakeholder.topics[this.topicIndex].categories[this.index], path);
  }
  
  public deleteCategoryOpen(index: number) {
    this.type = 'category';
    this.index = index;
    this.element = this.stakeholder.topics[this.topicIndex].categories[this.index];
    this.deleteOpen();
  }
  
  public deleteCategory() {
    let path: string[] = [
      this.stakeholder._id,
      this.stakeholder.topics[this.topicIndex]._id,
      this.stakeholder.topics[this.topicIndex].categories[this.index]._id
    ];
    let callback = (): void => {
      this.stakeholder.topics[this.topicIndex].categories.splice(this.index, 1);
      this.stakeholderService.setStakeholder(this.stakeholder);
    };
    this.delete('Category has been successfully be deleted', path, callback);
  }
  
  private buildSubcategory(subCategory: SubCategory) {
    let subCategories = this.stakeholder.topics[this.topicIndex].categories[this.selectedCategoryIndex].subCategories.filter(element => element._id !== subCategory._id);
    this.form = this.fb.group({
      _id: this.fb.control(subCategory._id),
      name: this.fb.control(subCategory.name, Validators.required),
      description: this.fb.control(subCategory.description),
      alias: this.fb.control(subCategory.alias, [
          Validators.required,
          this.stakeholderUtils.aliasValidator(subCategories)
        ]
      ),
      isActive: this.fb.control(subCategory.isActive),
      isPublic: this.fb.control(subCategory.isPublic),
      isDefault: this.fb.control(subCategory.isDefault),
      charts: this.fb.control(subCategory.charts),
      numbers: this.fb.control(subCategory.numbers)
    });
    this.subscriptions.push(this.form.get('name').valueChanges.subscribe(value => {
      let i = 1;
      value = this.stakeholderUtils.generateAlias(value);
      this.form.controls['alias'].setValue(value);
      while (this.form.get('alias').invalid) {
        this.form.controls['alias'].setValue(value + i);
        i++;
      }
    }));
  }
  
  public editSubCategoryOpen(index: number = -1) {
    this.index = index;
    this.type = 'subcategory';
    if (index === -1) {
      this.buildSubcategory(new SubCategory(null, null, null, true, true));
    } else {
      this.buildSubcategory(this.stakeholder.topics[this.topicIndex].categories[this.selectedCategoryIndex].subCategories[index]);
    }
    this.editOpen();
  }
  
  public saveSubCategory() {
    if (!this.form.invalid) {
      let path: string[] = [
        this.stakeholder._id,
        this.stakeholder.topics[this.topicIndex]._id,
        this.stakeholder.topics[this.topicIndex].categories[this.selectedCategoryIndex]._id,
      ];
      let callback = (subCategory: SubCategory): void => {
        if (this.index === -1) {
          this.stakeholder.topics[this.topicIndex].categories[this.selectedCategoryIndex].subCategories.push(subCategory);
        } else {
          this.stakeholder.topics[this.topicIndex].categories[this.selectedCategoryIndex].subCategories[this.index] = subCategory;
        }
        this.stakeholderService.setStakeholder(this.stakeholder);
      };
      if (this.index === -1) {
        this.save('Subcategory has been successfully created', path, this.form.value, callback);
      } else {
        this.save('Subcategory has been successfully saved', path, this.form.value, callback);
      }
    }
  }
    
    public toggleSubcategoryStatus(index: number) {
        this.index = index;
        this.type = 'subcategory';
        let path = [
            this.stakeholder._id,
            this.stakeholder.topics[this.topicIndex]._id,
            this.stakeholder.topics[this.topicIndex].categories[this.selectedCategoryIndex]._id,
            this.stakeholder.topics[this.topicIndex].categories[this.selectedCategoryIndex].subCategories[this.index]._id
        ];
        this.toggleStatus(this.stakeholder.topics[this.topicIndex].categories[this.selectedCategoryIndex].subCategories[this.index], path);
    }
    
    public toggleSubcategoryAccess(index: number) {
        this.index = index;
        this.type = 'subcategory';
        let path = [
            this.stakeholder._id,
            this.stakeholder.topics[this.topicIndex]._id,
            this.stakeholder.topics[this.topicIndex].categories[this.selectedCategoryIndex]._id,
            this.stakeholder.topics[this.topicIndex].categories[this.selectedCategoryIndex].subCategories[this.index]._id
        ];
        this.toggleAccess(this.stakeholder.topics[this.topicIndex].categories[this.selectedCategoryIndex].subCategories[this.index], path);
    }
  
  public deleteSubcategoryOpen(index) {
    this.type = 'subcategory';
    this.index = index;
    this.element = this.stakeholder.topics[this.topicIndex].categories[this.selectedCategoryIndex].subCategories[this.index];
    this.deleteOpen();
  }
  
  public deleteSubcategory() {
    let path: string[] = [
      this.stakeholder._id,
      this.stakeholder.topics[this.topicIndex]._id,
      this.stakeholder.topics[this.topicIndex].categories[this.selectedCategoryIndex]._id,
      this.stakeholder.topics[this.topicIndex].categories[this.selectedCategoryIndex].subCategories[this.index]._id
    ];
    let callback = (): void => {
      this.stakeholder.topics[this.topicIndex].categories[this.selectedCategoryIndex].subCategories.splice(this.index, 1);
      this.stakeholderService.setStakeholder(this.stakeholder);
    };
    this.delete('Subcategory has been successfully be deleted', path, callback);
  }
  
  private navigateToError() {
    this.router.navigate(['/error'], {queryParams: {'page': this.router.url}});
  }
  
  private editOpen() {
    this.editModal.cancelButtonText = 'Cancel';
    this.editModal.okButtonLeft = false;
    this.editModal.alertMessage = false;
    if (this.index === -1) {
      this.editModal.alertTitle = 'Create a new ' + this.type;
      this.editModal.okButtonText = 'Create';
    } else {
      this.editModal.alertTitle = 'Edit ' + this.type + '\'s information ';
      this.editModal.okButtonText = 'Save';
    }
    this.editModal.open();
  }
  
  private deleteOpen() {
    this.deleteModal.alertTitle = 'Delete ' + this.type;
    this.deleteModal.cancelButtonText = 'No';
    this.deleteModal.okButtonText = 'Yes';
    this.deleteModal.open();
  }
  
  private save(message: string, path: string[], saveElement: any, callback: Function, redirect = false) {
    this.stakeholderService.saveElement(this.properties.monitorServiceAPIURL, saveElement, path).subscribe(saveElement => {
      callback(saveElement);
      UIkit.notification(message, {
        status: 'success',
        timeout: 3000,
        pos: 'top-left'
      });
      if (redirect) {
        this.router.navigate(['../' + saveElement.alias], {
          relativeTo: this.route
        });
      }
    }, error => {
      UIkit.notification(error.error.message, {
        status: 'danger',
        timeout: 3000,
        pos: 'top-left'
      });
    });
  }
  
  private delete(message: string, path: string[], callback: Function, redirect = false) {
    this.stakeholderService.deleteElement(this.properties.monitorServiceAPIURL, path).subscribe(() => {
      callback();
      UIkit.notification(message, {
        status: 'success',
        timeout: 3000,
        pos: 'top-left'
      });
      if (redirect) {
        this.back();
      }
    }, error => {
      UIkit.notification(error.error.message, {
        status: 'danger',
        timeout: 3000,
        pos: 'top-left'
      });
    });
  }
  
  private toggleStatus(element: Topic | Category | SubCategory, path: string[]) {
    this.stakeholderService.toggleStatus(this.properties.monitorServiceAPIURL, path).subscribe(isActive => {
      element.isActive = isActive;
      this.stakeholderService.setStakeholder(this.stakeholder);
      UIkit.notification(StringUtils.capitalize(this.type) + ' has been successfully ' + (isActive ? 'activated' : 'deactivated'), {
        status: 'success',
        timeout: 3000,
        pos: 'top-left'
      });
    }, error => {
      UIkit.notification(error.error.message, {
        status: 'danger',
        timeout: 3000,
        pos: 'top-left'
      });
    });
  }
  
  private toggleAccess(element: Topic | Category | SubCategory, path: string[]) {
    this.stakeholderService.toggleAccess(this.properties.monitorServiceAPIURL, path).subscribe(isPublic => {
      element.isPublic = isPublic;
      this.stakeholderService.setStakeholder(this.stakeholder);
      UIkit.notification(StringUtils.capitalize(this.type) + ' has been successfully changed to ' + (isPublic ? 'public' : 'private'), {
        status: 'success',
        timeout: 3000,
        pos: 'top-left'
      });
    }, error => {
      UIkit.notification(error.error.message, {
        status: 'danger',
        timeout: 3000,
        pos: 'top-left'
      });
    });
  }
  
  back() {
    this.router.navigate(['../'], {
      relativeTo: this.route
    });
  }
  
  chooseSubcategory(categoryIndex: number, subcategoryIndex: number) {
    this.categoryIndex = categoryIndex;
    this.subCategoryIndex = subcategoryIndex;
  }
}