import { clientFetch } from '../api';

export interface ProfitOverview {
  period: string;
  startDate?: string;
  endDate?: string;
  summary: {
    totalRevenue: number;
    revenueFromTrackedProducts: number;
    totalCost: number;
    totalProfit: number;
    overallProfitMargin: number;
    averageProfitPerUnit: number;
    costDataCoverage: number;
    totalProductsSold: number;
    productsWithCostData: number;
  };
  topProfitableProducts: Array<{
    productId: string;
    productName: string;
    totalQuantitySold: number;
    totalRevenue: number;
    totalCost: number;
    totalProfit: number;
    averageProfit: number;
    profitMargin: number;
  }>;
  hasCostData: boolean;
}

export interface ProfitTrend {
  _id: {
    year: number;
    month: number;
    day: number;
  };
  revenue: number;
  cost: number;
  profit: number;
  orders: number;
  itemsWithCostData: number;
  profitMargin: number;
}

export interface DateRange {
  from: Date;
  to: Date;
}

export const getProfitOverview = async (
  periodOrRange?: string | DateRange
): Promise<ProfitOverview> => {
  let url = '/analytics/profit-overview';
  
  if (periodOrRange && typeof periodOrRange !== 'string') {
    // Date range provided
    const startDate = periodOrRange.from.toISOString().split('T')[0];
    const endDate = periodOrRange.to.toISOString().split('T')[0];
    url += `?startDate=${startDate}&endDate=${endDate}`;
  } else {
    // Period provided (backward compatibility)
    const period = periodOrRange || '30';
    url += `?period=${period}`;
  }
  
  return clientFetch(url);
};

export const getProfitTrends = async (
  periodOrRange?: string | DateRange
): Promise<ProfitTrend[]> => {
  let url = '/analytics/profit-trends';
  
  if (periodOrRange && typeof periodOrRange !== 'string') {
    // Date range provided
    const startDate = periodOrRange.from.toISOString().split('T')[0];
    const endDate = periodOrRange.to.toISOString().split('T')[0];
    url += `?startDate=${startDate}&endDate=${endDate}`;
  } else {
    // Period provided (backward compatibility)
    const period = periodOrRange || '30';
    url += `?period=${period}`;
  }
  
  return clientFetch(url);
};