librsigstopup 0.1.0

use rust_decimal::Decimal;
use rust_decimal_macros::dec;
use serde::{Deserialize, Serialize};
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct TaxConfig {
    pub base_amount: Decimal,
    pub admin_fee: Decimal,
}
impl Default for TaxConfig {
    fn default() -> Self {
        Self {
            base_amount: Decimal::ZERO,
            admin_fee: dec!(120_000),
        }
    }
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct TaxCalculator {
    config: TaxConfig,
}
impl TaxCalculator {
    pub fn new() -> Self {
        Self::default()
    }
    pub fn with_config(config: TaxConfig) -> Self {
        Self { config }
    }
    pub fn calculate(&self, pajak_input: Decimal) -> Decimal {
        tracing::info!(
            event = "calculate_tax",
            pajak_input = %pajak_input,
            admin_fee = %self.config.admin_fee,
            "Calculating tax"
        );
        let total_pajak = pajak_input + self.config.admin_fee;
        tracing::info!(
            event = "tax_calculated",
            total_pajak = %total_pajak,
            "Tax calculated"
        );
        total_pajak
    }
}
impl Default for TaxCalculator {
    fn default() -> Self {
        Self {
            config: TaxConfig::default(),
        }
    }
}
#[cfg(test)]
mod tests {
    use super::*;
    use rust_decimal_macros::dec;
    #[test]
    fn test_tax_default_admin_fee() {
        let calc = TaxCalculator::new();
        let result = calc.calculate(dec!(100_000));
        assert_eq!(result, dec!(220_000));
    }
    #[test]
    fn test_tax_custom_admin_fee() {
        let config = TaxConfig {
            base_amount: dec!(0),
            admin_fee: dec!(150_000),
        };
        let calc = TaxCalculator::with_config(config);
        let result = calc.calculate(dec!(50_000));
        assert_eq!(result, dec!(200_000));
    }
    #[test]
    fn test_tax_zero_input() {
        let calc = TaxCalculator::new();
        let result = calc.calculate(dec!(0));
        assert_eq!(result, dec!(120_000));
    }
}