import api from './axiosInstance.api';

// Types
export interface IGeoPoint {
    type: "Point";
    coordinates: [number, number]; // [lng, lat]
}

export interface IEventParticipant {
    user: string;
    joinedAt: Date;
    joinMethod: 'code' | 'link' | 'qr' | 'manual';
}

export interface IEvent {
    _id: string;
    title: string;
    code: string;
    theme: string;
    description?: string;
    organization: {
        _id: string;
        username: string;
        organizationType?: string;
    };
    createdBy: {
        _id: string;
        username: string;
        profilePhoto?: string;
    };
    capacity: number;
    startDate: string;
    endDate: string;
    defaultStartTime: string; // HH:MM format
    defaultEndTime: string; // HH:MM format
    type: 'in-person' | 'online' | 'hybrid';
    venue?: string;
    location?: IGeoPoint;
    geofenceRadius?: number;
    onlineLink?: string;
    participants: IEventParticipant[];
    waitlist: string[];
    status: 'draft' | 'published' | 'ongoing' | 'completed' | 'cancelled';
    participantCount?: number;
    isCapacityFull?: boolean;
    waitlistCount?: number;
    totalDays?: number;
    completedDays?: number;
    liveDays?: number;
    createdAt: string;
    updatedAt: string;
}

export interface EventFilters {
    query?: string;
    theme?: string;
    organization?: string;
    type?: 'in-person' | 'online' | 'hybrid';
    status?: 'draft' | 'published' | 'ongoing' | 'completed' | 'cancelled' | 'all';
    startDate?: string;
    endDate?: string;
    page?: number;
    limit?: number;
}

export interface PaginationMeta {
    total: number;
    page: number;
    limit: number;
    totalPages: number;
}

export interface SearchEventsResponse {
    events: IEvent[];
    pagination: PaginationMeta;
}

export interface CreateEventData {
    title: string;
    theme: string;
    description?: string;
    capacity: number;
    startDate: string;
    endDate: string;
    defaultStartTime?: string; // HH:MM format, defaults to "09:00"
    defaultEndTime?: string; // HH:MM format, defaults to "17:00"
    type: 'in-person' | 'online' | 'hybrid';
    venue?: string;
    longitude?: number;
    latitude?: number;
    geofenceRadius?: number;
    onlineLink?: string;
    allowSelfJoin?: boolean;
}

/**
 * Search events with filters and pagination
 */
export const searchEvents = async (filters: EventFilters = {}): Promise<SearchEventsResponse> => {
    const params = new URLSearchParams();

    if (filters.query) params.append('query', filters.query);
    if (filters.theme) params.append('theme', filters.theme);
    if (filters.organization) params.append('organization', filters.organization);
    if (filters.type) params.append('type', filters.type);
    if (filters.status && filters.status !== 'all') params.append('status', filters.status);
    if (filters.startDate) params.append('startDate', filters.startDate);
    if (filters.endDate) params.append('endDate', filters.endDate);
    if (filters.page) params.append('page', filters.page.toString());
    if (filters.limit) params.append('limit', filters.limit.toString());

    const response = await api.get<SearchEventsResponse>(`/events/search?${params.toString()}`);
    return response.data;
};

/**
 * Get single event details
 */
export const getEventDetails = async (eventId: string): Promise<IEvent> => {
    const response = await api.get<IEvent>(`/events/${eventId}`);
    return response.data;
};

/**
 * Create new event (trainers, organizations, and admins)
 */
export const createEvent = async (data: CreateEventData): Promise<{ message: string; event: IEvent }> => {
    const response = await api.post<{ message: string; event: IEvent }>('/events/create', data);
    return response.data;
};

/**
 * Update existing event
 */
export const updateEvent = async (eventId: string, data: Partial<CreateEventData>): Promise<{ message: string; event: IEvent }> => {
    const response = await api.put<{ message: string; event: IEvent }>(`/events/${eventId}`, data);
    return response.data;
};

/**
 * Delete event
 */
export const deleteEvent = async (eventId: string): Promise<{ message: string }> => {
    const response = await api.delete<{ message: string }>(`/events/${eventId}`);
    return response.data;
};

/**
 * Get trainer's own events
 */
export const getTrainerEvents = async (status?: string): Promise<{ events: IEvent[] }> => {
    const params = status ? `?status=${status}` : '';
    const response = await api.get<{ events: IEvent[] }>(`/events/my-events${params}`);
    return response.data;
};

/**
 * Get nearby events based on location
 */
export const getNearbyEvents = async (
    longitude: number,
    latitude: number,
    maxDistance: number = 50000
): Promise<{ events: IEvent[] }> => {
    const response = await api.get<{ events: IEvent[] }>(
        `/events/nearby?longitude=${longitude}&latitude=${latitude}&maxDistance=${maxDistance}`
    );
    return response.data;
};

/**
 * Join event by code
 */
export const joinEventByCode = async (code: string): Promise<{ message: string; event: IEvent }> => {
    const response = await api.post<{ message: string; event: IEvent }>('/events/join/code', { code });
    return response.data;
};

/**
 * Join event by link
 */
export const joinEventByLink = async (eventId: string, token: string): Promise<{ message: string; event: IEvent }> => {
    const response = await api.post<{ message: string; event: IEvent }>('/events/join/link', { eventId, token });
    return response.data;
};

/**
 * Get live/ongoing events (for map display)
 */
export const getLiveEvents = async (): Promise<{ events: IEvent[] }> => {
    const response = await api.get<{ events: IEvent[] }>('/events/live');
    return response.data;
};

/**
 * Get live training events (events with active training sessions)
 */
export const getLiveTrainingEvents = async (): Promise<{ events: IEvent[] }> => {
    const response = await api.get<{ events: IEvent[] }>('/events/live-trainings');
    return response.data;
};

/**
 * Get all events (admin view)
 */
export const getAllEventsForAdmin = async (filters: { status?: string; page?: number; limit?: number } = {}): Promise<SearchEventsResponse> => {
    const params = new URLSearchParams();
    if (filters.status) params.append('status', filters.status);
    if (filters.page) params.append('page', filters.page.toString());
    if (filters.limit) params.append('limit', filters.limit.toString());

    const response = await api.get<SearchEventsResponse>(`/events/all?${params.toString()}`);
    return response.data;
};

export default {
    searchEvents,
    getEventDetails,
    createEvent,
    updateEvent,
    deleteEvent,
    getTrainerEvents,
    getNearbyEvents,
    joinEventByCode,
    joinEventByLink,
    getLiveEvents,
    getLiveTrainingEvents,
    getAllEventsForAdmin,
};