import { calculateWindPressure, getKz } from './src/utils/windLogic';
import { calculateSeismicDesign, getFa, getFv } from './src/utils/seismicLogic';

console.log('--- Verification Script ---');

// Wind Verification
const windTest = () => {
    const speed = 100;
    const exposure = 'C';
    const height = 30;

    // Expected: Kz ~ 0.98 for 30ft Exp C (simplified logic result needed)
    // Formula implemented: Kz = 2.01 * (z/zg)^(2/alpha)
    // For C: alpha=9.5, zg=900. z=30.
    // Kz = 2.01 * (30/900)^(2/9.5) = 2.01 * (0.0333)^0.2105 = 2.01 * 0.488 ~= 0.98.

    const kz = getKz(height, exposure);
    console.log(`Wind: Height=${height}, Exposure=${exposure} -> Kz=${kz} (Expected ~0.98)`);

    const qz = calculateWindPressure(speed, exposure, height);
    // qz = 0.00256 * Kz * 1.0 * 0.85 * 100^2
    // qz = 0.00256 * 0.98 * 0.85 * 10000 = 21.32
    console.log(`Wind: Speed=${speed} -> qz=${qz.toFixed(2)} (Expected ~21.32)`);
};

// Seismic Verification
const seismicTest = () => {
    const ss = 0.2;
    const s1 = 0.1;
    const siteClass = 'D';

    const { sds, sd1 } = calculateSeismicDesign(ss, s1, siteClass);

    // Logic:
    // Fa for Site Class D, Ss=0.2 -> 1.6
    // Fv for Site Class D, S1=0.1 -> 2.4

    const fa = getFa(siteClass, ss);
    const fv = getFv(siteClass, s1);
    console.log(`Seismic: Site=${siteClass}, Ss=${ss}, S1=${s1} -> Fa=${fa}, Fv=${fv} (Expected 1.6, 2.4)`);

    // Sds = 2/3 * Fa * Ss = 2/3 * 1.6 * 0.2 = 0.2133
    // Sd1 = 2/3 * Fv * S1 = 2/3 * 2.4 * 0.1 = 0.16

    console.log(`Seismic: Sds=${sds.toFixed(4)} (Expected 0.2133)`);
    console.log(`Seismic: Sd1=${sd1.toFixed(4)} (Expected 0.1600)`);
};

windTest();
seismicTest();