/**
 * WeekViewStrategy - Strategy for week/day view rendering
 * Extracts the time-based grid logic from GridManager
 */

import { ViewStrategy, ViewContext, ViewLayoutConfig } from './ViewStrategy';
import { DateService } from '../utils/DateService';
import { calendarConfig } from '../core/CalendarConfig';
import { GridRenderer } from '../renderers/GridRenderer';
import { GridStyleManager } from '../renderers/GridStyleManager';

export class WeekViewStrategy implements ViewStrategy {
  private dateService: DateService;
  private gridRenderer: GridRenderer;
  private styleManager: GridStyleManager;
  
  constructor() {
    const timezone = calendarConfig.getTimezone?.();
    this.dateService = new DateService(timezone);
    this.gridRenderer = new GridRenderer();
    this.styleManager = new GridStyleManager();
  }
  
  getLayoutConfig(): ViewLayoutConfig {
    return {
      needsTimeAxis: true,
      columnCount: calendarConfig.getWorkWeekSettings().totalDays,
      scrollable: true,
      eventPositioning: 'time-based'
    };
  }
  
  renderGrid(context: ViewContext): void {
    // Update grid styles
    this.styleManager.updateGridStyles(context.resourceData);
    
    // Render the grid structure (time axis + day columns)
    this.gridRenderer.renderGrid(
      context.container,
      context.currentDate,
      context.resourceData
    );
  }
  
  getNextPeriod(currentDate: Date): Date {
    return this.dateService.addWeeks(currentDate, 1);
  }
  
  getPreviousPeriod(currentDate: Date): Date {
    return this.dateService.addWeeks(currentDate, -1);
  }
  
  getPeriodLabel(date: Date): string {
    const weekBounds = this.dateService.getWeekBounds(date);
    const weekStart = this.dateService.startOfDay(weekBounds.start);
    const weekEnd = this.dateService.addDays(weekStart, 6);
    const weekNumber = this.dateService.getWeekNumber(date);
    
    return `Week ${weekNumber}: ${this.dateService.formatDateRange(weekStart, weekEnd)}`;
  }
  
  getDisplayDates(baseDate: Date): Date[] {
    const workWeekSettings = calendarConfig.getWorkWeekSettings();
    return this.dateService.getWorkWeekDates(baseDate, workWeekSettings.workDays);
  }
  
  getPeriodRange(baseDate: Date): { startDate: Date; endDate: Date } {
    const weekBounds = this.dateService.getWeekBounds(baseDate);
    const weekStart = this.dateService.startOfDay(weekBounds.start);
    const weekEnd = this.dateService.addDays(weekStart, 6);
    
    return {
      startDate: weekStart,
      endDate: weekEnd
    };
  }
}