/**
 * AllDayCollapseService - Manages collapse/expand UI for all-day events
 *
 * STATELESS SERVICE - Reads expanded state from DOM via AllDayDomReader
 * - No persistent state
 * - Reads expanded state from DOM CSS class
 * - Updates chevron button and overflow indicators
 * - Controls event visibility based on row number
 */
import { ALL_DAY_CONSTANTS } from '../../configurations/CalendarConfig';
import { ColumnDetectionUtils } from '../../utils/ColumnDetectionUtils';
import { AllDayDomReader } from './AllDayDomReader';
export class AllDayCollapseService {
    constructor(heightService) {
        this.heightService = heightService;
    }
    /**
     * Toggle between expanded and collapsed state
     * Reads current state from DOM, toggles it, and updates UI
     */
    toggleExpanded() {
        const container = AllDayDomReader.getAllDayContainer();
        if (!container)
            return;
        // Read current state from DOM
        const isCurrentlyExpanded = container.classList.contains('expanded');
        // Toggle state in DOM
        if (isCurrentlyExpanded) {
            container.classList.remove('expanded');
        }
        else {
            container.classList.add('expanded');
        }
        // Update UI based on new state
        this.updateUI();
    }
    /**
     * Update all UI elements based on current DOM state
     */
    updateUI() {
        const isExpanded = AllDayDomReader.isExpanded();
        const maxRows = AllDayDomReader.getMaxRowFromEvents();
        // Update chevron button
        if (maxRows > ALL_DAY_CONSTANTS.MAX_COLLAPSED_ROWS) {
            this.updateChevronButton(true, isExpanded);
            if (isExpanded) {
                this.clearOverflowIndicators();
            }
            else {
                this.updateOverflowIndicators();
            }
        }
        else {
            this.updateChevronButton(false, isExpanded);
            this.clearOverflowIndicators();
        }
        // Update event visibility
        this.updateEventVisibility(isExpanded);
        // Calculate height based on expanded state
        // When collapsed, show max MAX_COLLAPSED_ROWS, when expanded show all rows
        const targetRows = isExpanded ? maxRows : Math.min(maxRows, ALL_DAY_CONSTANTS.MAX_COLLAPSED_ROWS);
        this.heightService.animateToRows(targetRows);
    }
    /**
     * Update event visibility based on expanded state
     */
    updateEventVisibility(isExpanded) {
        const events = AllDayDomReader.getEventElements();
        events.forEach(event => {
            const row = AllDayDomReader.getGridRow(event);
            if (row > ALL_DAY_CONSTANTS.MAX_COLLAPSED_ROWS) {
                if (isExpanded) {
                    event.classList.remove('max-event-overflow-hide');
                    event.classList.add('max-event-overflow-show');
                }
                else {
                    event.classList.remove('max-event-overflow-show');
                    event.classList.add('max-event-overflow-hide');
                }
            }
        });
    }
    /**
     * Update chevron button visibility and state
     */
    updateChevronButton(show, isExpanded) {
        const headerSpacer = AllDayDomReader.getHeaderSpacer();
        if (!headerSpacer)
            return;
        let chevron = headerSpacer.querySelector('.allday-chevron');
        if (show && !chevron) {
            // Create chevron button
            chevron = document.createElement('button');
            chevron.className = 'allday-chevron collapsed';
            chevron.innerHTML = `
        <svg width="12" height="8" viewBox="0 0 12 8">
          <path d="M1 1.5L6 6.5L11 1.5" stroke="currentColor" stroke-width="2" fill="none"/>
        </svg>
      `;
            chevron.onclick = () => this.toggleExpanded();
            headerSpacer.appendChild(chevron);
        }
        else if (!show && chevron) {
            // Remove chevron button
            chevron.remove();
        }
        else if (chevron) {
            // Update chevron state
            chevron.classList.toggle('collapsed', !isExpanded);
            chevron.classList.toggle('expanded', isExpanded);
        }
    }
    /**
     * Update overflow indicators for collapsed state
     * Shows "+X more" indicators in columns with overflow
     */
    updateOverflowIndicators() {
        const container = AllDayDomReader.getAllDayContainer();
        if (!container)
            return;
        const columns = ColumnDetectionUtils.getColumns();
        columns.forEach((columnBounds) => {
            const totalEventsInColumn = AllDayDomReader.countEventsInColumn(columnBounds.index);
            const overflowCount = totalEventsInColumn - ALL_DAY_CONSTANTS.MAX_COLLAPSED_ROWS;
            if (overflowCount > 0) {
                // Check if indicator already exists
                let existingIndicator = container.querySelector(`.max-event-indicator[data-column="${columnBounds.index}"]`);
                if (existingIndicator) {
                    // Update existing indicator
                    existingIndicator.innerHTML = `<span>+${overflowCount + 1} more</span>`;
                }
                else {
                    // Create new overflow indicator
                    const overflowElement = document.createElement('swp-allday-event');
                    overflowElement.className = 'max-event-indicator';
                    overflowElement.setAttribute('data-column', columnBounds.index.toString());
                    overflowElement.style.gridRow = ALL_DAY_CONSTANTS.MAX_COLLAPSED_ROWS.toString();
                    overflowElement.style.gridColumn = columnBounds.index.toString();
                    overflowElement.innerHTML = `<span>+${overflowCount + 1} more</span>`;
                    overflowElement.onclick = (e) => {
                        e.stopPropagation();
                        this.toggleExpanded();
                    };
                    container.appendChild(overflowElement);
                }
            }
        });
    }
    /**
     * Clear all overflow indicators
     */
    clearOverflowIndicators() {
        const container = AllDayDomReader.getAllDayContainer();
        if (!container)
            return;
        container.querySelectorAll('.max-event-indicator').forEach((element) => {
            element.remove();
        });
    }
    /**
     * Initialize collapse/expand UI based on current DOM state
     * Called after events are rendered
     */
    initializeUI() {
        this.updateUI();
    }
}
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