import { Component, OnInit, OnDestroy, ViewChild } from '@angular/core';
import { ActivatedRoute } from '@angular/router';

import { SelectItem } from 'primeng/api';
import { Table } from 'primeng/table';

import { Customer } from '../models/customer.model';
import * as fromCustomers from '../reducers';
import * as customerActions from '../actions/customer.actions';
import { globals, OperationalStatus } from '@app/shared/global';

import { BaseComp } from '@app/shared/base/base.component';
import { CustomerCacheService } from '@app/domain/services/customer-cache.service';
import { ListReturnCacheService } from '@app/domain/services/list-return-cache.service';
import { FilterDefinition, FilterChangeEvent } from '@app/shared/dynamic-filter/dynamic-filter.component';

@Component({
  selector: 'agm-customer-list',
  templateUrl: './customer-list.component.html',
  styleUrls: ['./customer-list.component.css']
})
export class CustomerListComponent extends BaseComp implements OnInit, OnDestroy {
  readonly CREATED = 'createdAt';
  readonly ACTIVE = OperationalStatus.ACTIVE;
  readonly BILLABLE = 'billable';
  readonly PARTNER = 'partner';
  readonly PARTNER_NAME = 'partnerName';

  customers: Array<Customer>;
  curCust: Customer;

  @ViewChild("dt") dt: Table;

  statuses: SelectItem[];
  partners: SelectItem[];
  cols: any[];
  totalItems;
  isSelfSignup = false;

  searchAccordionOpen = sessionStorage.getItem('customers-list-accordion') === 'true';
  private lastFiltersQuery: Record<string, any> | undefined;
  private useCacheOnReturn = false;
  cacheTtlSeconds: number;
  customerFilterDefinitions: FilterDefinition[];

  constructor(
    private readonly route: ActivatedRoute,
    private readonly customerCache: CustomerCacheService,
    private readonly listReturnCache: ListReturnCacheService,
  ) {
    super();
    this.cacheTtlSeconds = Math.round(this.customerCache.getTtlMs() / 1000);
    this.totalItems = { '=0': '', '=1': '1 ' + $localize`:@@customer:customer`.toLocaleLowerCase(), 'other': $localize`:@@total#Customers:Total: # customers` };

    this.statuses = [
      { label: globals.all, value: null },
      { label: globals.active, value: true },
      { label: globals.notActive, value: false }
    ];
    this.cols = [
      { field: "name", header: globals.name, filtered: true, filterMatchMode: 'contains' },
      { field: "username", header: globals.userName, filtered: true, filterMatchMode: 'contains' },
      { field: "contact", header: globals.contact },
      { field: "totalJobs", header: globals.jobs, width: '5%', filtered: false },
      { field: this.CREATED, header: globals.from, width: '6%' },
      { field: this.BILLABLE, header: "Billable", width: '9%' },
      { field: this.ACTIVE, header: globals.active, width: '9%' },
      { field: this.PARTNER_NAME, header: globals.partner, width: '9%' }
    ];

    this.customerFilterDefinitions = [
      { key: 'name', label: globals.name, dataType: 'text' },
      { key: 'username', label: globals.userName, dataType: 'text' },
      { key: 'email', label: globals.email, dataType: 'text' },
      { key: 'contact', label: globals.contact, dataType: 'text' },
      { key: 'createdAt', label: globals.from, dataType: 'date-preset' },
    ];
  }

  ngOnInit() {
    const saved = localStorage.getItem('isSelfSignup');
    this.isSelfSignup = saved === 'true';

    this.sub$ = this.store.select(fromCustomers.getAllCustomers).subscribe(customers => {
      this.setCustomersAndPartners(customers);
    });

    this.sub$.add(this.store.select(fromCustomers.getSelectedCustomer).subscribe(cust => {
      this.curCust = cust;
    }));

    this.useCacheOnReturn = this.listReturnCache.startVisit('customers');
    const savedFilters = sessionStorage.getItem('customers-list-last-filters');
    if (savedFilters) {
      try {
        this.lastFiltersQuery = JSON.parse(savedFilters);
      } catch (_err) {
        this.lastFiltersQuery = undefined;
      }
    }
    this.store.dispatch(savedFilters
      ? new customerActions.Fetch({ filters: savedFilters, useCache: this.useCacheOnReturn })
      : new customerActions.Fetch({ useCache: this.useCacheOnReturn })
    );
  }

  private setCustomersAndPartners(customers: Customer[]) {
    const filtered = this.isSelfSignup ? customers.filter(c => c.selfSignup) : customers;
    this.customers = filtered.map(c => ({
      ...c,
      partnerName: c.partner?.name || null
    }));
    this.partners = [
      { label: globals.all, value: null },
      ...customers
        .filter(c => c.partner)
        .map(c => c.partner.name)
        .filter((v, i, a) => a.indexOf(v) === i)
        .map(name => ({ label: name, value: name }))
    ];
  }

  onToggle(event: any): void {
    this.isSelfSignup = event.checked;
    localStorage.setItem('isSelfSignup', String(this.isSelfSignup));
    this.store.select(fromCustomers.getAllCustomers).subscribe(customers => {
      this.setCustomersAndPartners(customers);
    });
  }

  onRowSelect(event) {
    this.store.dispatch(new customerActions.Select(event.data));
  }

  onAccordionToggle(expanded: boolean) {
    sessionStorage.setItem('customers-list-accordion', String(expanded));
  }

  updateCacheTtl(): void {
    const ttlMs = this.customerCache.setTtlMs(Number(this.cacheTtlSeconds || 0) * 1000);
    this.cacheTtlSeconds = Math.round(ttlMs / 1000);
  }

  onFiltersSubmit(event: FilterChangeEvent) {
    const q = { ...event.query };
    const filtersStr = JSON.stringify(q);
    const prevFilters = sessionStorage.getItem('customers-list-last-filters');
    if (filtersStr !== prevFilters) {
      this.customerCache.invalidate();
      this.useCacheOnReturn = false;
    }
    this.lastFiltersQuery = q;
    sessionStorage.setItem('customers-list-last-filters', filtersStr);
    this.store.dispatch(new customerActions.Fetch({ filters: filtersStr, useCache: this.useCacheOnReturn }));
  }

  get canEdit() {
    return (this.curCust && this.curCust._id !== '0');
  }

  newCustomer() {
    this.router.navigate(['customer', '0'], { relativeTo: this.route });
  }

  editCustomer() {
    this.listReturnCache.markPending('customers');
    this.router.navigate(['customer', this.curCust._id], { relativeTo: this.route });
  }

  deleteCustomer() {
    if (!this.curCust) { return; }
    this.confirmSvc.confirm({
      message: globals.confirmDeleteThing.replace('#thing#', globals.customer),
      accept: () => {
        this.store.dispatch(new customerActions.Delete(this.curCust));
        this.curCust = null;
      }
    });
  }

  ngOnDestroy() {
    super.ngOnDestroy();
  }

}