// Column rendering strategy interface and implementations

import { Configuration } from '../configuration/CalendarConfig';
import { DateService } from '../utils/DateService';
import { WorkHoursManager } from '../managers/WorkHoursManager';

/**
 * Interface for column rendering strategies
 */
export interface IColumnRenderer {
  render(columnContainer: HTMLElement, context: IColumnRenderContext): void;
}

/**
 * Context for column rendering
 */
export interface IColumnRenderContext {
  currentWeek: Date;
  config: Configuration;
}

/**
 * Date-based column renderer (original functionality)
 */
export class DateColumnRenderer implements IColumnRenderer {
  private dateService: DateService;
  private workHoursManager: WorkHoursManager;

  constructor(
    dateService: DateService,
    workHoursManager: WorkHoursManager
  ) {
    this.dateService = dateService;
    this.workHoursManager = workHoursManager;
  }

  render(columnContainer: HTMLElement, context: IColumnRenderContext): void {
    const { currentWeek, config } = context;
    
    const workWeekSettings = config.getWorkWeekSettings();
    const dates = this.dateService.getWorkWeekDates(currentWeek, workWeekSettings.workDays);
    const dateSettings = config.getDateViewSettings();
    const daysToShow = dates.slice(0, dateSettings.weekDays);
    

    daysToShow.forEach((date) => {
      const column = document.createElement('swp-day-column');
      (column as any).dataset.date = this.dateService.formatISODate(date);
      
      // Apply work hours styling
      this.applyWorkHoursToColumn(column, date);
      
      const eventsLayer = document.createElement('swp-events-layer');
      column.appendChild(eventsLayer);
      
      columnContainer.appendChild(column);
    });
  }

  private applyWorkHoursToColumn(column: HTMLElement, date: Date): void {
    const workHours = this.workHoursManager.getWorkHoursForDate(date);
    
    if (workHours === 'off') {
      // No work hours - mark as off day (full day will be colored)
      (column as any).dataset.workHours = 'off';
    } else {
      // Calculate and apply non-work hours overlays (before and after work)
      const nonWorkStyle = this.workHoursManager.calculateNonWorkHoursStyle(workHours);
      if (nonWorkStyle) {
        // Before work overlay (::before pseudo-element)
        column.style.setProperty('--before-work-height', `${nonWorkStyle.beforeWorkHeight}px`);
        
        // After work overlay (::after pseudo-element)
        column.style.setProperty('--after-work-top', `${nonWorkStyle.afterWorkTop}px`);
        
      }
    }
  }

}