import {
  Component,
  Input,
  Output,
  EventEmitter,
  ViewChild,
  OnChanges
} from "@angular/core";
import { NgModel } from "@angular/forms";

@Component({
  selector: "hbr-datetime",
  templateUrl: "./datetime-picker.component.html"
})
export class DatePickerComponent implements OnChanges {
  @Input() dateInput: string;
  @Input() oneDayOffset: boolean;

  @ViewChild("searchTime") searchTime: NgModel;

  @Output() search = new EventEmitter<string>();

  ngOnChanges(): void {
    this.dateInput = this.dateInput.trim();
  }

  get dateInvalid(): boolean {
    return (
      (this.searchTime.errors &&
        this.searchTime.errors.dateValidator &&
        (this.searchTime.dirty || this.searchTime.touched)) ||
      false
    );
  }

  convertDate(strDate: string): string {
    if (
      /^(0[1-9]|[12][0-9]|3[01])[- /.](0[1-9]|1[012])[- /.](19|20)\d\d$/.test(
        strDate
      )
    ) {
      let parts = strDate.split(/[-\/]/);
      strDate =
        parts[2] /*Year*/ + "-" + parts[1] /*Month*/ + "-" + parts[0] /*Date*/;
    }
    return strDate;
  }

  doSearch() {
    let searchTerm: string = "";
    if (this.searchTime.valid && this.dateInput) {
      let timestamp: number =
        new Date(this.convertDate(this.searchTime.value)).getTime() / 1000;
      if (this.oneDayOffset) {
        timestamp += 3600 * 24;
      }
      searchTerm = timestamp.toString();
    }
    this.search.emit(searchTerm);
  }
}