import { apiClient } from './client';

export interface SleepPattern {
  averageDuration: number;
  averageBedtime: string;
  averageWakeTime: string;
  nightWakings: number;
  napCount: number;
  consistency: number;
  trend: 'improving' | 'stable' | 'declining';
}

export interface FeedingPattern {
  averageInterval: number;
  averageDuration: number;
  totalFeedings: number;
  feedingMethod: Record<string, number>;
  consistency: number;
  trend: 'increasing' | 'stable' | 'decreasing';
}

export interface DiaperPattern {
  wetDiapersPerDay: number;
  dirtyDiapersPerDay: number;
  averageInterval: number;
  isHealthy: boolean;
  notes: string;
}

export interface GrowthSpurtDetection {
  isLikelyGrowthSpurt: boolean;
  confidence: number;
  indicators: string[];
  expectedDuration: string;
  recommendations: string[];
}

export interface PatternInsights {
  sleep: SleepPattern | null;
  feeding: FeedingPattern | null;
  diaper: DiaperPattern | null;
  growthSpurt: GrowthSpurtDetection | null;
  recommendations: string[];
  concernsDetected: string[];
}

export interface SleepPrediction {
  nextNapTime: Date | null;
  nextNapConfidence: number;
  nextBedtime: Date | null;
  bedtimeConfidence: number;
  optimalWakeWindows: number[];
  reasoning: string;
}

export interface FeedingPrediction {
  nextFeedingTime: Date | null;
  confidence: number;
  expectedInterval: number;
  reasoning: string;
}

export interface PredictionInsights {
  sleep: SleepPrediction;
  feeding: FeedingPrediction;
  generatedAt: Date;
}

export interface WeeklyReport {
  childId: string;
  weekStart: Date;
  weekEnd: Date;
  summary: {
    totalFeedings: number;
    averageFeedingsPerDay: number;
    totalSleepHours: number;
    averageSleepHoursPerDay: number;
    totalDiapers: number;
    averageDiapersPerDay: number;
  };
  dailyData: Array<{
    date: Date;
    feedings: number;
    sleepHours: number;
    diapers: number;
  }>;
  trends: {
    feedingTrend: 'increasing' | 'stable' | 'decreasing';
    sleepTrend: 'improving' | 'stable' | 'declining';
  };
  highlights: string[];
}

export interface MonthlyReport {
  childId: string;
  month: Date;
  summary: {
    totalFeedings: number;
    totalSleepHours: number;
    totalDiapers: number;
    averageFeedingsPerDay: number;
    averageSleepHoursPerDay: number;
    averageDiapersPerDay: number;
  };
  weeklyData: Array<{
    weekStart: Date;
    feedings: number;
    sleepHours: number;
    diapers: number;
  }>;
  milestones: string[];
  trends: string[];
}

// Advanced Analytics Interfaces
export interface CircadianRhythm {
  sleepPhaseShift: number;
  consistency: number;
  optimalBedtime: string;
  optimalWakeTime: string;
  chronotype: 'early_bird' | 'night_owl' | 'typical';
  melatoninOnset: string;
  recommendedSchedule: {
    wakeTime: string;
    morningNap?: { start: string; duration: number };
    afternoonNap?: { start: string; duration: number };
    bedtime: string;
    totalSleepTarget: number;
  };
}

export interface AnomalyDetection {
  anomalies: Array<{
    activityId: string;
    type: string;
    timestamp: Date;
    severity: 'low' | 'medium' | 'high';
    description: string;
    deviation: number;
  }>;
  alerts: Array<{
    type: string;
    severity: 'info' | 'warning' | 'critical';
    message: string;
    recommendations: string[];
  }>;
  confidenceScore: number;
}

export interface PatternCluster {
  clusterId: string;
  label: string;
  activities: any[];
  centroid: {
    averageTime: string;
    averageDuration: number;
    characteristics: Record<string, any>;
  };
  confidence: number;
}

export interface CorrelationAnalysis {
  feedingSleepCorrelation: number;
  activityDiaperCorrelation: number;
  sleepMoodCorrelation?: number;
  insights: string[];
}

export interface TrendAnalysis {
  shortTermTrend: {
    direction: 'improving' | 'stable' | 'declining';
    slope: number;
    confidence: number;
    r2Score: number;
    changePercent: number;
  };
  mediumTermTrend: {
    direction: 'improving' | 'stable' | 'declining';
    slope: number;
    confidence: number;
    r2Score: number;
    changePercent: number;
  };
  longTermTrend: {
    direction: 'improving' | 'stable' | 'declining';
    slope: number;
    confidence: number;
    r2Score: number;
    changePercent: number;
  };
  seasonalPatterns?: Array<{
    type: 'weekly' | 'monthly';
    pattern: string;
    strength: number;
  }>;
  prediction: {
    next7Days: Array<{
      date: Date;
      predictedValue: number;
      confidenceInterval: { lower: number; upper: number };
    }>;
    confidence: number;
    factors: string[];
  };
}

export interface GrowthPercentile {
  weight?: {
    value: number;
    percentile: number;
    zScore: number;
    interpretation: string;
  };
  height?: {
    value: number;
    percentile: number;
    zScore: number;
    interpretation: string;
  };
  headCircumference?: {
    value: number;
    percentile: number;
    zScore: number;
    interpretation: string;
  };
  bmi?: {
    value: number;
    percentile: number;
    zScore: number;
    interpretation: string;
  };
}

export interface GrowthAnalysis {
  currentPercentiles: GrowthPercentile;
  growthVelocity: {
    weightVelocity?: {
      value: number;
      unit: string;
      percentile: number;
    };
    heightVelocity?: {
      value: number;
      unit: string;
      percentile: number;
    };
    interpretation: string;
    concerns: string[];
  };
  growthCurve: {
    measurements: Array<{
      date: Date;
      weight?: number;
      height?: number;
      headCircumference?: number;
    }>;
    percentileCurves: {
      weight: Record<string, number[]>;
      height: Record<string, number[]>;
      headCircumference: Record<string, number[]>;
    };
  };
  projections: {
    threeMonths: GrowthPercentile;
    sixMonths: GrowthPercentile;
    confidence: number;
  };
  recommendations: string[];
  alerts: Array<{
    type: string;
    severity: 'low' | 'medium' | 'high';
    message: string;
    action: string;
  }>;
}

export interface AdvancedAnalyticsDashboard {
  circadianRhythm: CircadianRhythm;
  anomalies: AnomalyDetection;
  correlations: CorrelationAnalysis;
  growthAnalysis: GrowthAnalysis;
  trends: Record<string, TrendAnalysis>;
  clusters: Record<string, PatternCluster[]>;
}

export const analyticsApi = {
  // Get pattern insights
  getInsights: async (childId: string, days: number = 7): Promise<PatternInsights> => {
    const response = await apiClient.get(`/api/v1/analytics/insights/${childId}`, {
      params: { days },
    });
    return response.data.data;
  },

  // Get predictions
  getPredictions: async (childId: string): Promise<PredictionInsights> => {
    const response = await apiClient.get(`/api/v1/analytics/predictions/${childId}`);
    const data = response.data.data;

    // Convert date strings to Date objects
    return {
      ...data,
      generatedAt: new Date(data.generatedAt),
      sleep: {
        ...data.sleep,
        nextNapTime: data.sleep.nextNapTime ? new Date(data.sleep.nextNapTime) : null,
        nextBedtime: data.sleep.nextBedtime ? new Date(data.sleep.nextBedtime) : null,
      },
      feeding: {
        ...data.feeding,
        nextFeedingTime: data.feeding.nextFeedingTime ? new Date(data.feeding.nextFeedingTime) : null,
      },
    };
  },

  // Get weekly report
  getWeeklyReport: async (childId: string, startDate?: Date): Promise<WeeklyReport> => {
    const response = await apiClient.get(`/api/v1/analytics/reports/${childId}/weekly`, {
      params: startDate ? { startDate: startDate.toISOString() } : {},
    });
    const data = response.data.data;

    // Convert date strings
    return {
      ...data,
      weekStart: new Date(data.weekStart),
      weekEnd: new Date(data.weekEnd),
      dailyData: data.dailyData.map((d: any) => ({
        ...d,
        date: new Date(d.date),
      })),
    };
  },

  // Get monthly report
  getMonthlyReport: async (childId: string, month?: Date): Promise<MonthlyReport> => {
    const response = await apiClient.get(`/api/v1/analytics/reports/${childId}/monthly`, {
      params: month ? { month: month.toISOString() } : {},
    });
    const data = response.data.data;

    // Convert date strings
    return {
      ...data,
      month: new Date(data.month),
      weeklyData: data.weeklyData.map((w: any) => ({
        ...w,
        weekStart: new Date(w.weekStart),
      })),
    };
  },

  // Export data
  exportData: async (
    childId: string,
    format: 'json' | 'csv' | 'pdf',
    startDate?: Date,
    endDate?: Date,
  ): Promise<Blob> => {
    const params: any = { format };
    if (startDate) params.startDate = startDate.toISOString();
    if (endDate) params.endDate = endDate.toISOString();

    const response = await apiClient.get(`/api/v1/analytics/export/${childId}`, {
      params,
      responseType: format === 'json' ? 'json' : 'blob',
    });

    if (format === 'json') {
      // Convert JSON to Blob
      const jsonStr = JSON.stringify(response.data, null, 2);
      return new Blob([jsonStr], { type: 'application/json' });
    }

    return response.data;
  },

  // Compare children
  compareChildren: async (
    childIds: string[],
    metric: ComparisonMetric,
    startDate: string,
    endDate: string,
  ): Promise<any> => {
    const response = await apiClient.get('/api/v1/analytics/compare', {
      params: {
        childIds: childIds.join(','),
        metric,
        startDate,
        endDate,
      },
    });
    return response.data.data;
  },

  // Advanced Analytics Methods

  // Get circadian rhythm analysis
  getCircadianRhythm: async (childId: string, days: number = 14): Promise<CircadianRhythm> => {
    const response = await apiClient.get(`/api/v1/analytics/advanced/circadian-rhythm/${childId}`, {
      params: { days },
    });
    return response.data.data;
  },

  // Get anomaly detection
  getAnomalies: async (childId: string, days: number = 30): Promise<AnomalyDetection> => {
    const response = await apiClient.get(`/api/v1/analytics/advanced/anomalies/${childId}`, {
      params: { days },
    });
    const data = response.data.data;

    // Convert timestamps
    return {
      ...data,
      anomalies: data.anomalies.map((a: any) => ({
        ...a,
        timestamp: new Date(a.timestamp),
      })),
    };
  },

  // Get activity clusters
  getClusters: async (
    childId: string,
    activityType: string,
    days: number = 30,
  ): Promise<PatternCluster[]> => {
    const response = await apiClient.get(`/api/v1/analytics/advanced/clusters/${childId}`, {
      params: { activityType, days },
    });
    return response.data.data;
  },

  // Get correlation analysis
  getCorrelations: async (childId: string, days: number = 14): Promise<CorrelationAnalysis> => {
    const response = await apiClient.get(`/api/v1/analytics/advanced/correlations/${childId}`, {
      params: { days },
    });
    return response.data.data;
  },

  // Get trend analysis
  getTrends: async (childId: string, activityType: string): Promise<TrendAnalysis> => {
    const response = await apiClient.get(`/api/v1/analytics/advanced/trends/${childId}`, {
      params: { type: activityType },
    });
    const data = response.data.data;

    // Convert dates in predictions
    return {
      ...data,
      prediction: {
        ...data.prediction,
        next7Days: data.prediction.next7Days.map((p: any) => ({
          ...p,
          date: new Date(p.date),
        })),
      },
    };
  },

  // Get growth percentiles
  calculateGrowthPercentiles: async (
    childId: string,
    measurement: {
      date: Date;
      weight?: number;
      height?: number;
      headCircumference?: number;
    },
  ): Promise<GrowthPercentile> => {
    const response = await apiClient.post(
      `/api/v1/analytics/growth/percentiles/${childId}`,
      {
        ...measurement,
        date: measurement.date.toISOString(),
      },
    );
    return response.data.data;
  },

  // Get growth analysis
  getGrowthAnalysis: async (childId: string): Promise<GrowthAnalysis> => {
    const response = await apiClient.get(`/api/v1/analytics/growth/analysis/${childId}`);
    const data = response.data.data;

    // Convert dates in measurements
    return {
      ...data,
      growthCurve: {
        ...data.growthCurve,
        measurements: data.growthCurve.measurements.map((m: any) => ({
          ...m,
          date: new Date(m.date),
        })),
      },
    };
  },

  // Get comprehensive analytics dashboard
  getAdvancedDashboard: async (childId: string): Promise<AdvancedAnalyticsDashboard> => {
    const response = await apiClient.get(`/api/v1/analytics/advanced/dashboard/${childId}`);
    const data = response.data.data;

    // Process all date conversions
    return {
      ...data,
      anomalies: {
        ...data.anomalies,
        anomalies: data.anomalies.anomalies.map((a: any) => ({
          ...a,
          timestamp: new Date(a.timestamp),
        })),
      },
      growthAnalysis: {
        ...data.growthAnalysis,
        growthCurve: {
          ...data.growthAnalysis.growthCurve,
          measurements: data.growthAnalysis.growthCurve.measurements.map((m: any) => ({
            ...m,
            date: new Date(m.date),
          })),
        },
      },
    };
  },
};

export enum ComparisonMetric {
  SLEEP_PATTERNS = 'sleep-patterns',
  FEEDING_FREQUENCY = 'feeding-frequency',
  GROWTH_CURVES = 'growth-curves',
  DIAPER_CHANGES = 'diaper-changes',
  ACTIVITIES = 'activities',
}