/**
 * Event Recurrence Interfaces
 *
 * Defines interfaces for complex recurring event patterns and management
 */
import { CalendarEvent, EventRecurrence } from './event.interfaces';
/**
 * Recurrence pattern types
 */
export type RecurrencePatternType = 'daily' | 'weekly' | 'monthly_date' | 'monthly_weekday' | 'yearly_date' | 'yearly_weekday' | 'custom';
/**
 * Advanced recurrence pattern
 */
export interface RecurrencePattern {
    /** Pattern type */
    type: RecurrencePatternType;
    /** Interval between occurrences */
    interval: number;
    /** Days of week (for weekly/monthly patterns) */
    daysOfWeek?: number[];
    /** Week of month (for monthly weekday patterns) */
    weekOfMonth?: number;
    /** Day of month (for monthly date patterns) */
    dayOfMonth?: number;
    /** Month (for yearly patterns) */
    month?: number;
    /** Custom RRULE string */
    rrule?: string;
    /** Time zone for recurrence calculation */
    timeZone?: string;
}
/**
 * Recurrence bounds
 */
export interface RecurrenceBounds {
    /** Start date for recurrence */
    startDate: Date;
    /** End type */
    endType: 'never' | 'date' | 'count';
    /** End date (if endType is 'date') */
    endDate?: Date;
    /** Number of occurrences (if endType is 'count') */
    count?: number;
    /** Maximum date to generate (safety limit) */
    maxDate?: Date;
}
/**
 * Recurrence exception
 */
export interface RecurrenceException {
    /** Original occurrence date */
    originalStart: Date;
    /** Exception action */
    action: 'delete' | 'move' | 'modify';
    /** New date (if moved) */
    newDate?: Date;
    /** Modified event data (if modified) */
    modifiedEvent?: Partial<CalendarEvent>;
    /** Reason for exception */
    reason?: string;
}
/**
 * Generated occurrence
 */
export interface RecurrenceOccurrence {
    /** Occurrence date */
    date: Date;
    /** Original start date of this occurrence */
    originalStart: Date;
    /** Actual start date (if modified by exception) */
    actualStart?: Date;
    /** Whether this is an exception */
    isException: boolean;
    /** Exception details */
    exception?: RecurrenceException;
    /** Generated event data */
    event: CalendarEvent;
    /** Occurrence sequence number */
    sequence: number;
    /** Whether this is the master event */
    isMaster: boolean;
}
/**
 * Recurrence expansion options
 */
export interface RecurrenceExpansionOptions {
    /** Start date for expansion */
    startDate: Date;
    /** End date for expansion */
    endDate: Date;
    /** Maximum number of occurrences to generate */
    maxOccurrences?: number;
    /** Include exceptions */
    includeExceptions?: boolean;
    /** Time zone for expansion */
    timeZone?: string;
}
/**
 * Recurrence modification options
 */
export interface RecurrenceModificationOptions {
    /** Modification scope */
    scope: 'this' | 'future' | 'all';
    /** Update recurrence pattern */
    updatePattern?: boolean;
    /** Create exception for original */
    createException?: boolean;
}
/**
 * Recurrence analysis result
 */
export interface RecurrenceAnalysis {
    /** Pattern description */
    description: string;
    /** Pattern description (alternative name for compatibility) */
    patternDescription?: string;
    /** Next occurrence */
    nextOccurrence?: Date;
    /** Previous occurrence */
    previousOccurrence?: Date;
    /** Total occurrences (if bounded) */
    totalOccurrences?: number;
    /** Remaining occurrences */
    remainingOccurrences?: number;
    /** Frequency per year */
    frequencyPerYear: number;
    /** Pattern complexity score */
    complexityScore: number;
    /** Potential conflicts */
    potentialConflicts: string[];
    /** Whether the pattern is valid */
    isValid?: boolean;
}
/**
 * Holiday and calendar system integration
 */
export interface CalendarSystemSettings {
    /** Calendar system type */
    type: 'gregorian' | 'lunar' | 'solar' | 'fiscal';
    /** Holiday calendar to consider */
    holidayCalendar?: string;
    /** Skip weekends */
    skipWeekends?: boolean;
    /** Skip holidays */
    skipHolidays?: boolean;
    /** Working days only */
    workingDaysOnly?: boolean;
    /** Custom skip dates */
    customSkipDates?: Date[];
}
/**
 * Event recurrence service interface
 */
export interface IEventRecurrenceService {
    /**
     * Initialize recurrence service
     */
    initialize(calendarSettings?: CalendarSystemSettings): void;
    /**
     * Create recurrence pattern
     */
    createPattern(baseEvent: CalendarEvent, pattern: RecurrencePattern, bounds: RecurrenceBounds): EventRecurrence;
    /**
     * Expand recurrence into occurrences
     */
    expandRecurrence(event: CalendarEvent, options: RecurrenceExpansionOptions): RecurrenceOccurrence[];
    /**
     * Get next occurrence
     */
    getNextOccurrence(event: CalendarEvent, fromDate?: Date): RecurrenceOccurrence | null;
    /**
     * Get previous occurrence
     */
    getPreviousOccurrence(event: CalendarEvent, fromDate?: Date): RecurrenceOccurrence | null;
    /**
     * Add exception to recurring event
     */
    addException(masterEventId: string, exception: RecurrenceException): Promise<void>;
    /**
     * Remove exception
     */
    removeException(masterEventId: string, exceptionDate: Date): Promise<void>;
    /**
     * Modify recurring event
     */
    modifyRecurringEvent(eventId: string, changes: Partial<CalendarEvent>, options: RecurrenceModificationOptions): Promise<CalendarEvent[]>;
    /**
     * Delete recurring event
     */
    deleteRecurringEvent(eventId: string, options: RecurrenceModificationOptions): Promise<void>;
    /**
     * Analyze recurrence pattern
     */
    analyzeRecurrence(event: CalendarEvent): RecurrenceAnalysis;
    /**
     * Validate recurrence pattern
     */
    validatePattern(pattern: RecurrencePattern, bounds: RecurrenceBounds): {
        isValid: boolean;
        errors: string[];
        warnings: string[];
    };
    /**
     * Parse RRULE string
     */
    parseRRule(rrule: string): RecurrencePattern;
    /**
     * Generate RRULE string
     */
    generateRRule(pattern: RecurrencePattern, bounds: RecurrenceBounds): string;
    /**
     * Get human-readable description
     */
    getRecurrenceDescription(pattern: RecurrencePattern, bounds: RecurrenceBounds, locale?: string): string;
    /**
     * Find conflicting occurrences
     */
    findConflictingOccurrences(event: CalendarEvent, existingEvents: CalendarEvent[], startDate: Date, endDate: Date): Array<{
        occurrence: RecurrenceOccurrence;
        conflicts: CalendarEvent[];
    }>;
    /**
     * Optimize recurrence pattern
     */
    optimizePattern(pattern: RecurrencePattern): RecurrencePattern;
    /**
     * Get recurrence statistics
     */
    getRecurrenceStats(events: CalendarEvent[]): {
        totalRecurring: number;
        averageOccurrences: number;
        mostCommonPattern: string;
        complexityDistribution: Record<string, number>;
    };
}