/**
 * DateColumnDataSource - Provides date-based columns
 *
 * Calculates which dates to display based on:
 * - Current date
 * - Current view (day/week/month)
 * - Workweek settings
 */
export class DateColumnDataSource {
    constructor(dateService, config, currentDate, currentView) {
        this.dateService = dateService;
        this.config = config;
        this.currentDate = currentDate;
        this.currentView = currentView;
    }
    /**
     * Get columns (dates) to display
     */
    getColumns() {
        switch (this.currentView) {
            case 'week':
                return this.getWeekDates();
            case 'month':
                return this.getMonthDates();
            case 'day':
                return [this.currentDate];
            default:
                return this.getWeekDates();
        }
    }
    /**
     * Get type of datasource
     */
    getType() {
        return 'date';
    }
    /**
     * Update current date
     */
    setCurrentDate(date) {
        this.currentDate = date;
    }
    /**
     * Update current view
     */
    setCurrentView(view) {
        this.currentView = view;
    }
    /**
     * Get dates for week view based on workweek settings
     */
    getWeekDates() {
        const weekStart = this.getISOWeekStart(this.currentDate);
        const workWeekSettings = this.config.getWorkWeekSettings();
        return this.dateService.getWorkWeekDates(weekStart, workWeekSettings.workDays);
    }
    /**
     * Get all dates in current month
     */
    getMonthDates() {
        const dates = [];
        const monthStart = this.getMonthStart(this.currentDate);
        const monthEnd = this.getMonthEnd(this.currentDate);
        const totalDays = Math.ceil((monthEnd.getTime() - monthStart.getTime()) / (1000 * 60 * 60 * 24)) + 1;
        for (let i = 0; i < totalDays; i++) {
            dates.push(this.dateService.addDays(monthStart, i));
        }
        return dates;
    }
    /**
     * Get ISO week start (Monday)
     */
    getISOWeekStart(date) {
        const weekBounds = this.dateService.getWeekBounds(date);
        return this.dateService.startOfDay(weekBounds.start);
    }
    /**
     * Get month start
     */
    getMonthStart(date) {
        const year = date.getFullYear();
        const month = date.getMonth();
        return this.dateService.startOfDay(new Date(year, month, 1));
    }
    /**
     * Get month end
     */
    getMonthEnd(date) {
        const nextMonth = this.dateService.addMonths(date, 1);
        const firstOfNextMonth = this.getMonthStart(nextMonth);
        return this.dateService.endOfDay(this.dateService.addDays(firstOfNextMonth, -1));
    }
}
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