// Calendar type definitions

// Time period view types (how much time to display)
export type ViewPeriod = 'day' | 'week' | 'month';

// Calendar mode types (how to organize the data)
export type CalendarMode = 'date' | 'resource';

// Legacy aliases for backwards compatibility
export type DateViewType = ViewPeriod;
export type ViewType = DateViewType;
export type CalendarView = ViewType;
export type CalendarType = CalendarMode;

export type SyncStatus = 'synced' | 'pending' | 'error';

export interface Resource {
  name: string;
  displayName: string;
  avatarUrl: string;
  employeeId: string;
  events: CalendarEvent[];
}

export interface ResourceCalendarData {
  date: string;
  resources: Resource[];
}

export interface RenderContext {
  container: HTMLElement;
  startDate: Date;
  endDate: Date;
}

export interface CalendarEvent {
  id: string;
  title: string;
  start: string; // ISO 8601
  end: string;   // ISO 8601
  type: string;  // Flexible event type - can be any string value
  allDay: boolean;
  syncStatus: SyncStatus;
  
  // Resource information (only present in resource calendar mode)
  resource?: {
    name: string;
    displayName: string;
    employeeId: string;
  };
  
  recurringId?: string;
  metadata?: Record<string, any>;
}

export interface CalendarConfig {
  // Scrollbar styling
  scrollbarWidth: number;      // Width of scrollbar in pixels
  scrollbarColor: string;      // Scrollbar thumb color
  scrollbarTrackColor: string; // Scrollbar track color
  scrollbarHoverColor: string; // Scrollbar thumb hover color
  scrollbarBorderRadius: number; // Border radius for scrollbar thumb
  
  // Interaction settings
  allowDrag: boolean;
  allowResize: boolean;
  allowCreate: boolean;
  
  // API settings
  apiEndpoint: string;
  dateFormat: string;
  timeFormat: string;
  
  // Feature flags
  enableSearch: boolean;
  enableTouch: boolean;
  
  // Event defaults
  defaultEventDuration: number; // Minutes
  minEventDuration: number;     // Minutes
  maxEventDuration: number;     // Minutes
}

export interface EventLogEntry {
  type: string;
  detail: any;
  timestamp: number;
}

export interface ListenerEntry {
  eventType: string;
  handler: EventListener;
  options?: AddEventListenerOptions;
}

export interface IEventBus {
  on(eventType: string, handler: EventListener, options?: AddEventListenerOptions): () => void;
  once(eventType: string, handler: EventListener): () => void;
  off(eventType: string, handler: EventListener): void;
  emit(eventType: string, detail?: any): boolean;
  getEventLog(eventType?: string): EventLogEntry[];
  setDebug(enabled: boolean): void;
  destroy(): void;
}

export interface GridPosition {
  minutes: number;
  time: string;
  y: number;
}

export interface Period {
  start: string;
  end: string;
  mode?: CalendarMode; // Optional: which calendar mode this period is for
}

export interface EventData {
  events: CalendarEvent[];
  meta: {
    start: string;
    end: string;
    total: number;
    mode?: CalendarMode; // Which calendar mode this data is for
  };
}

/**
 * Context interfaces for different calendar modes
 */
export interface DateModeContext {
  mode: 'date';
  currentWeek: Date;
  period: ViewPeriod;
  weekDays: number;
  firstDayOfWeek: number;
}

export interface ResourceModeContext {
  mode: 'resource';
  selectedDate: Date;
  resources: Resource[];
  maxResources: number;
}

/**
 * Union type for type-safe mode contexts
 */
export type CalendarModeContext = DateModeContext | ResourceModeContext;