import type {
  BusinessAlert,
  MetricCardData,
  PaymentBreakdownItem,
  TopProductRow,
} from '../types/commerce';

const STORE_MULTIPLIERS: Record<string, number> = {
  all: 1.0,
  'blr-indiranagar': 0.42,
  'blr-koramangala': 0.28,
  'blr-whitefield': 0.18,
  'che-anna-nagar': 0.12,
  'hyd-jubilee': 0.1,
};

const RANGE_MULTIPLIERS: Record<string, number> = {
  '7d': 1.0,
  '30d': 3.8,
  '90d': 11.2,
  mtd: 2.1,
  ytd: 24.5,
  custom: 1.5,
};

function getMult(storeId: string, range: string): {storeMult: number; rangeMult: number; totalMult: number} {
  const storeMult = STORE_MULTIPLIERS[storeId] ?? 1.0;
  const rangeMult = RANGE_MULTIPLIERS[range] ?? 1.0;
  return {storeMult, rangeMult, totalMult: storeMult * rangeMult};
}

export function getCommerceKpis(storeId = 'all', range = '7d') {
  const {totalMult, storeMult} = getMult(storeId, range);

  const baseRevenue = 340000 * totalMult;
  const baseOrders = Math.round(1284 * totalMult);
  const baseAov = Math.round(1420 * (0.9 + storeMult * 0.25));
  const baseNetSales = 318000 * totalMult;
  const baseRefunds = 22000 * totalMult;
  const baseConversion = Number((23.8 * (0.85 + storeMult * 0.3)).toFixed(1));

  return {
    revenue: {
      title: 'Total Revenue',
      rawValue: baseRevenue,
      change: '+14.2% vs prev',
      trendDirection: 'up' as const,
      subtitle: 'Net revenue across selected store',
    },
    orders: {
      title: 'Total Orders',
      rawValue: baseOrders,
      change: '+8.5%',
      trendDirection: 'up' as const,
      subtitle: 'Completed order volume',
    },
    aov: {
      title: 'Avg Order Value',
      rawValue: baseAov,
      change: '+5.1%',
      trendDirection: 'up' as const,
      subtitle: 'Average spend per cart',
    },
    netSales: {
      title: 'Net Sales',
      rawValue: baseNetSales,
      change: '+13.9%',
      trendDirection: 'up' as const,
      subtitle: 'Revenue after discounts',
    },
    refunds: {
      title: 'Refunds',
      rawValue: baseRefunds,
      change: '-2.4%',
      trendDirection: 'down' as const,
      subtitle: 'Total returns rate',
    },
    conversion: {
      title: 'Conversion',
      rawValue: baseConversion,
      change: '+1.4%',
      trendDirection: 'up' as const,
      subtitle: 'Visits to purchase ratio',
    },
    grossSales: {
      title: 'Gross Sales',
      rawValue: baseRevenue * 1.065,
      change: '+12.8%',
      trendDirection: 'up' as const,
    },
    discounts: {
      title: 'Discounts & Promos',
      rawValue: baseRefunds,
      change: '-4.1%',
      trendDirection: 'down' as const,
    },
  };
}

export function getRevenueTrendData(storeId = 'all', range = '7d') {
  const {totalMult} = getMult(storeId, range);
  return [
    {time: '08:00', Revenue: Math.round(18000 * totalMult), Target: Math.round(15000 * totalMult)},
    {time: '10:00', Revenue: Math.round(35000 * totalMult), Target: Math.round(30000 * totalMult)},
    {time: '12:00', Revenue: Math.round(72000 * totalMult), Target: Math.round(60000 * totalMult)},
    {time: '14:00', Revenue: Math.round(95000 * totalMult), Target: Math.round(80000 * totalMult)},
    {time: '16:00', Revenue: Math.round(82000 * totalMult), Target: Math.round(75000 * totalMult)},
    {time: '18:00', Revenue: Math.round(110000 * totalMult), Target: Math.round(90000 * totalMult)},
    {time: '20:00', Revenue: Math.round(68000 * totalMult), Target: Math.round(60000 * totalMult)},
  ];
}

export function getOrdersTrendData(storeId = 'all', range = '7d') {
  const {totalMult} = getMult(storeId, range);
  return [
    {time: '08:00', Orders: Math.max(1, Math.round(42 * totalMult))},
    {time: '10:00', Orders: Math.max(1, Math.round(88 * totalMult))},
    {time: '12:00', Orders: Math.max(1, Math.round(165 * totalMult))},
    {time: '14:00', Orders: Math.max(1, Math.round(210 * totalMult))},
    {time: '16:00', Orders: Math.max(1, Math.round(184 * totalMult))},
    {time: '18:00', Orders: Math.max(1, Math.round(245 * totalMult))},
    {time: '20:00', Orders: Math.max(1, Math.round(135 * totalMult))},
  ];
}

export function getPaymentBreakdownData(storeId = 'all', range = '7d'): PaymentBreakdownItem[] {
  const {totalMult} = getMult(storeId, range);
  const totalInr = 340000 * totalMult;

  return [
    {method: 'UPI', amount: `₹${(totalInr * 0.58).toLocaleString('en-IN', {maximumFractionDigits: 0})}`, percentage: 58, color: '#10b981'},
    {method: 'Credit & Debit Cards', amount: `₹${(totalInr * 0.28).toLocaleString('en-IN', {maximumFractionDigits: 0})}`, percentage: 28, color: '#3b82f6'},
    {method: 'Store Credit / LYT', amount: `₹${(totalInr * 0.10).toLocaleString('en-IN', {maximumFractionDigits: 0})}`, percentage: 10, color: '#f59e0b'},
    {method: 'Cash & POS', amount: `₹${(totalInr * 0.04).toLocaleString('en-IN', {maximumFractionDigits: 0})}`, percentage: 4, color: '#8b5cf6'},
  ];
}

export const STORE_PERFORMANCE_DATA = [
  {store: 'Indiranagar Flagship', Revenue: 910000},
  {store: 'Koramangala 80ft', Revenue: 520000},
  {store: 'Jayanagar 4th Block', Revenue: 400000},
  {store: 'Whitefield Main', Revenue: 330000},
];

export function getTopProductsData(storeId = 'all', range = '7d'): TopProductRow[] {
  const {totalMult} = getMult(storeId, range);
  return [
    {id: 'tp1', name: 'Signature Espresso Blend (1kg)', category: 'Beverage & Beans', unitsSold: Math.round(482 * totalMult), revenue: `₹${(144600 * totalMult).toLocaleString('en-IN', {maximumFractionDigits: 0})}`, growth: '+18.4%', growthDirection: 'up', stockCount: 142, stockStatus: 'in_stock'},
    {id: 'tp2', name: 'Artisanal Cold Brew Pack (6x)', category: 'Ready to Drink', unitsSold: Math.round(310 * totalMult), revenue: `₹${(93000 * totalMult).toLocaleString('en-IN', {maximumFractionDigits: 0})}`, growth: '+12.1%', growthDirection: 'up', stockCount: 18, stockStatus: 'low_stock'},
    {id: 'tp3', name: 'Ceramic Barista Mug (Matte Black)', category: 'Merchandise', unitsSold: Math.round(215 * totalMult), revenue: `₹${(75250 * totalMult).toLocaleString('en-IN', {maximumFractionDigits: 0})}`, growth: '+8.9%', growthDirection: 'up', stockCount: 8, stockStatus: 'low_stock'},
    {id: 'tp4', name: 'Vanilla Bean Syrup (750ml)', category: 'Syrups', unitsSold: Math.round(184 * totalMult), revenue: `₹${(46000 * totalMult).toLocaleString('en-IN', {maximumFractionDigits: 0})}`, growth: '+5.4%', growthDirection: 'up', stockCount: 85, stockStatus: 'in_stock'},
    {id: 'tp5', name: 'French Press Brewer (8-Cup)', category: 'Equipment', unitsSold: Math.round(94 * totalMult), revenue: `₹${(37600 * totalMult).toLocaleString('en-IN', {maximumFractionDigits: 0})}`, growth: '-2.1%', growthDirection: 'down', stockCount: 0, stockStatus: 'out_of_stock'},
  ];
}

export const BUSINESS_ALERTS: BusinessAlert[] = [
  {
    id: 'ba1',
    type: 'low_stock',
    title: 'Low Stock Reorder Alert',
    description: 'Ceramic Barista Mug has only 8 units left at Koramangala 80ft.',
    actionText: 'Reorder Stock',
    severity: 'critical',
  },
  {
    id: 'ba2',
    type: 'refund_spike',
    title: 'Refund Spike Detected',
    description: 'Whitefield store processed 4 return requests in the last 2 hours.',
    actionText: 'Review Return Audit',
    severity: 'warning',
  },
  {
    id: 'ba3',
    type: 'best_seller',
    title: 'Best Seller Momentum',
    description: 'Signature Espresso Blend sales spiked +18.4% above weekly baseline.',
    actionText: 'Promote Banner',
    severity: 'success',
  },
  {
    id: 'ba4',
    type: 'promotion_opportunity',
    title: 'Weekend Upsell Opportunity',
    description: 'Combine Cold Brew Pack with Syrups for a +₹250 AOV expansion.',
    actionText: 'Launch Campaign',
    severity: 'info',
  },
];