import {Component, computed, inject, OnInit, signal} from '@angular/core';
import {CommonModule, DatePipe} from '@angular/common';
import {MatTableModule} from '@angular/material/table';
import {MatButtonModule} from '@angular/material/button';
import {MatIconModule} from '@angular/material/icon';
import {MatTooltipModule} from '@angular/material/tooltip';
import {SiteService, StaffPlaytime} from '@api';

@Component({
  selector: 'app-staff-pt',
  standalone: true,
  imports: [CommonModule, MatTableModule, MatButtonModule, MatIconModule, MatTooltipModule, DatePipe],
  templateUrl: './staff-pt.component.html',
  styleUrl: './staff-pt.component.scss'
})
export class StaffPtComponent implements OnInit {
  siteService = inject(SiteService);

  staffPt = signal<StaffPlaytime[]>([]);

  weekStart = signal<Date>(this.getStartOfWeek(new Date()));
  weekEnd = computed(() => this.getEndOfWeek(this.weekStart()));

  todayStart = signal<Date>(this.startOfDay(new Date()));

  displayedColumns = ['staff_member', 'playtime', 'last_played'];

  ngOnInit(): void {
    this.loadCurrentWeek();
  }

  private loadCurrentWeek() {
    this.loadStaffData(this.weekStart(), this.weekEnd());
  }

  prevWeek() {
    const prev = new Date(this.weekStart());
    prev.setDate(prev.getDate() - 7);
    prev.setHours(0, 0, 0, 0);
    this.weekStart.set(prev);
    this.loadCurrentWeek();
  }

  nextWeek() {
    if (!this.canGoNextWeek()) return;
    const next = new Date(this.weekStart());
    next.setDate(next.getDate() + 7);
    next.setHours(0, 0, 0, 0);
    this.weekStart.set(next);
    this.loadCurrentWeek();
  }

  canGoNextWeek(): boolean {
    const nextWeekStart = new Date(this.weekStart());
    nextWeekStart.setDate(nextWeekStart.getDate() + 7);
    nextWeekStart.setHours(0, 0, 0, 0);
    return nextWeekStart.getTime() <= this.todayStart().getTime();
  }

  weekLabel(): string {
    const start = this.weekStart();
    const end = this.weekEnd();

    const startFmt = start.toLocaleDateString(undefined, {month: 'short', day: 'numeric'});
    const endFmt = end.toLocaleDateString(undefined, {month: 'short', day: 'numeric'});
    const year = end.getFullYear();
    return `Week ${startFmt} – ${endFmt}, ${year}`;
  }

  minutesToHm(mins?: number): string {
    if (mins == null) return '';
    const h = Math.floor(mins / 60);
    const m = mins % 60;
    return `${h}:${m.toString().padStart(2, '0')}`;
  }

  private loadStaffData(from: Date, to: Date) {
    this.siteService.getStaffPlaytime(from.toISOString(), to.toISOString())
      .subscribe({
        next: data => this.staffPt.set(data ?? []),
        error: err => console.error('Error getting staff playtime:', err)
      });
  }

  private getStartOfWeek(date: Date): Date {
    const d = new Date(date);
    d.setDate(d.getDate() - d.getDay()); // Sunday start
    d.setHours(0, 0, 0, 0);
    return d;
  }

  private getEndOfWeek(start: Date): Date {
    const d = new Date(start);
    d.setDate(start.getDate() + 6);
    d.setHours(23, 59, 59, 999);
    return d;
  }

  private startOfDay(date: Date): Date {
    const d = new Date(date);
    d.setHours(0, 0, 0, 0);
    return d;
  }
}