import { Schema, model, Document, Types } from 'mongoose';

// Aggregated statistics for each user (updated periodically)
export interface IUserStats extends Document {
  user: Types.ObjectId;
  
  // Time metrics
  totalOnlineTime: number; // minutes
  lastOnlineTime: Date;
  averageSessionDuration: number; // minutes
  totalSessions: number;
  
  // Activity counts
  eventsCreated: number;
  eventsJoined: number;
  eventsCompleted: number;
  formsCreated: number;
  formsSubmitted: number;
  
  // Verification metrics (for organizations)
  trainersVerified?: number;
  trainersRejected?: number;
  
  // Verification metrics (for admins)
  organizationsVerified?: number;
  organizationsRejected?: number;
  
  // Engagement metrics
  loginCount: number;
  lastLoginDate: Date;
  consecutiveLoginDays: number;
  longestLoginStreak: number;
  
  // Content interaction
  profileUpdates: number;
  locationUpdates: number;
  documentsUploaded: number;
  
  // Performance metrics (for trainers)
  averageEventAttendance?: number;
  totalEventParticipants?: number;
  formResponsesReceived?: number;
  
  // Last activity
  lastActivityDate: Date;
  lastActivityType: string;
  
  // Period tracking
  periodStart: Date; // Start of current tracking period
  periodEnd: Date; // End of current tracking period
  
  createdAt: Date;
  updatedAt: Date;
}

const UserStatsSchema = new Schema<IUserStats>({
  user: {
    type: Schema.Types.ObjectId,
    ref: 'User',
    required: true,
    unique: true,
    index: true
  },
  
  // Time metrics
  totalOnlineTime: {
    type: Number,
    default: 0
  },
  lastOnlineTime: {
    type: Date,
    default: Date.now
  },
  averageSessionDuration: {
    type: Number,
    default: 0
  },
  totalSessions: {
    type: Number,
    default: 0
  },
  
  // Activity counts
  eventsCreated: {
    type: Number,
    default: 0,
    index: true
  },
  eventsJoined: {
    type: Number,
    default: 0,
    index: true
  },
  eventsCompleted: {
    type: Number,
    default: 0
  },
  formsCreated: {
    type: Number,
    default: 0
  },
  formsSubmitted: {
    type: Number,
    default: 0
  },
  
  // Verification metrics
  trainersVerified: {
    type: Number,
    default: 0
  },
  trainersRejected: {
    type: Number,
    default: 0
  },
  organizationsVerified: {
    type: Number,
    default: 0
  },
  organizationsRejected: {
    type: Number,
    default: 0
  },
  
  // Engagement metrics
  loginCount: {
    type: Number,
    default: 0,
    index: true
  },
  lastLoginDate: {
    type: Date,
    default: Date.now,
    index: true
  },
  consecutiveLoginDays: {
    type: Number,
    default: 0
  },
  longestLoginStreak: {
    type: Number,
    default: 0
  },
  
  // Content interaction
  profileUpdates: {
    type: Number,
    default: 0
  },
  locationUpdates: {
    type: Number,
    default: 0
  },
  documentsUploaded: {
    type: Number,
    default: 0
  },
  
  // Performance metrics
  averageEventAttendance: {
    type: Number,
    default: 0
  },
  totalEventParticipants: {
    type: Number,
    default: 0
  },
  formResponsesReceived: {
    type: Number,
    default: 0
  },
  
  // Last activity
  lastActivityDate: {
    type: Date,
    default: Date.now,
    index: true
  },
  lastActivityType: {
    type: String,
    default: ''
  },
  
  // Period tracking
  periodStart: {
    type: Date,
    default: Date.now
  },
  periodEnd: {
    type: Date,
    default: () => new Date(Date.now() + 30 * 24 * 60 * 60 * 1000) // 30 days
  }
}, {
  timestamps: true
});

// Indexes for leaderboards and rankings
UserStatsSchema.index({ eventsCreated: -1 });
UserStatsSchema.index({ eventsJoined: -1 });
UserStatsSchema.index({ totalOnlineTime: -1 });
UserStatsSchema.index({ loginCount: -1 });
UserStatsSchema.index({ longestLoginStreak: -1 });

export default model<IUserStats>('UserStats', UserStatsSchema);