package financial

// TransportCostCalculatorImpl implements TransportCostCalculator interface
type TransportCostCalculatorImpl struct {
	config *Config
}

// NewTransportCostCalculator creates a new transport cost calculator
func NewTransportCostCalculator(config *Config) TransportCostCalculator {
	return &TransportCostCalculatorImpl{config: config}
}

// CalculateTransportCost calculates transport cost per unit based on distance and resource type
func (tc *TransportCostCalculatorImpl) CalculateTransportCost(resourceType string, distanceKm float64) float64 {
	// Get transport rate from config
	rate, exists := tc.config.TransportRates[resourceType]
	if !exists {
		rate = 0.001 // Default
	}

	return distanceKm * rate
}