Pricing System

// Pricing calculation
final totalFare = baseFare + distanceCost + timeCost + (surgePricing * demandMultiplier);

// Where:
// - baseFare: Fixed starting price for vehicle type
// - distanceCost: costPerKm * distanceInKm
// - timeCost: costPerMinute * durationInMinutes  
// - surgePricing: Additional charge during high demand

Trip details:
- Vehicle: Moto
- Distance: 3.5 km
- Duration: 12 minutes
- Demand: Normal (1.0x)

Calculation:
Base fare: $3,000
Distance: 3.5 km × $800 = $2,800
Time: 12 min × $100 = $1,200
Surge: $0 (normal demand)

Total: $7,000 COP

Trip details:
- Vehicle: Carro
- Distance: 8.2 km
- Duration: 25 minutes
- Demand: High (1.5x surge)

Calculation:
Base fare: $4,500
Distance: 8.2 km × $1,200 = $9,840
Time: 25 min × $150 = $3,750
Subtotal: $18,090
Surge (50%): $18,090 × 0.5 = $9,045

Total: $27,135 COP

Trip details:
- Vehicle: Carro Carga
- Distance: 15.8 km
- Duration: 42 minutes
- Demand: Normal (1.0x)

Calculation:
Base fare: $5,000
Distance: 15.8 km × $1,500 = $23,700
Time: 42 min × $200 = $8,400
Surge: $0

Total: $37,100 COP

-- Pricing configuration table
CREATE TABLE pricing_config (
  id INT PRIMARY KEY AUTO_INCREMENT,
  vehicle_type ENUM('moto', 'carro', 'moto_carga', 'carro_carga'),
  base_fare DECIMAL(10,2),
  cost_per_km DECIMAL(10,2),
  cost_per_minute DECIMAL(10,2),
  minimum_fare DECIMAL(10,2),
  time_period ENUM('peak', 'normal', 'night'),
  active BOOLEAN DEFAULT TRUE,
  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

// Surge multiplier calculation
double calculateSurgeMultiplier() {
  final activeTrips = getActiveTripsInArea();
  final availableDrivers = getAvailableDriversInArea();
  
  final demandRatio = activeTrips / max(availableDrivers, 1);
  
  if (demandRatio < 1.0) return 1.0; // No surge
  if (demandRatio < 2.0) return 1.2; // Low surge
  if (demandRatio < 3.0) return 1.5; // Medium surge
  return 2.0; // High surge (capped)
}

// Commission calculation
final platformCommission = totalFare * 0.20; // 20%
final driverEarnings = totalFare - platformCommission;

// Example:
// Total fare: $10,000
// Platform: $2,000 (20%)
// Driver: $8,000 (80%)

// Apply promo code to trip
final discount = await applyPromoCode(
  code: 'FIRST RIDE',
  tripEstimate: estimatedFare,
);

final finalPrice = estimatedFare - discount.amount;

{
  "vehicle_type": "carro",
  "breakdown": {
    "base_fare": 4500,
    "distance": {
      "km": 5.2,
      "cost_per_km": 1200,
      "total": 6240
    },
    "time": {
      "minutes": 15,
      "cost_per_minute": 150,
      "total": 2250
    },
    "surge": {
      "multiplier": 1.0,
      "additional": 0
    },
    "discount": 0,
    "estimated_total": 12990
  }
}