// === Conversion Tables ===
// Cardio: points → 1.5-mile run time (min:sec)
const cardioTable = {
  50: "9:12", 45: "10:00", 40: "11:00", 35: "12:30",
  30: "14:00", 25: "15:30", 20: "16:30", 15: "17:30", 10: "18:30"
};

// Upper Body: points → push-ups
const upperTable = {
  15: 67, 14: 60, 13: 55, 12: 49,
  11: 45, 10: 40, 9: 35, 8: 30, 7: 25, 6: 20, 5: 15, 4: 10
};

// Core: points → sit-ups
const coreTable = {
  15: 58, 14: 54, 13: 50, 12: 45,
  11: 42, 10: 38, 9: 34, 8: 30, 7: 25, 6: 20, 5: 15, 4: 10
};

// Converts points to reps or times based on table
function convert(points, table) {
  const keys = Object.keys(table)
    .map(Number)
    .sort((a, b) => b - a);

  for (let k of keys) {
    if (points >= k) return table[k];
  }
  return "N/A";
}

// DOM elements
const formEl = document.getElementById("ptForm");
const ageEl = document.getElementById("age");
const resultsEl = document.getElementById("results");

formEl.addEventListener("submit", function(e) {
  e.preventDefault();
  calculateMinimums();
});

function calculateMinimums() {
  const age = Number(ageEl.value);
  if (!age) {
    resultsEl.innerHTML = "<em>Please enter your age.</em>";
    return;
  }

  // Max points per component
  const maxCardio = 50;
  const maxUpper = 15;
  const maxCore = 15;

  const targetScore = 75;
  const assumption = document.querySelector(
    'input[name="assumption"]:checked'
  ).value;

  let cardioPts = 0, upperPts = 0, corePts = 0;

  if (assumption === "cardio") {
    cardioPts = maxCardio;
    const remaining = targetScore - cardioPts;
    upperPts = corePts = Math.ceil(remaining / 2);
  }

  if (assumption === "upper") {
    upperPts = maxUpper;
    const remaining = targetScore - upperPts;
    cardioPts = Math.ceil(remaining / 2);
    corePts = Math.ceil(remaining / 2);
  }

  if (assumption === "core") {
    corePts = maxCore;
    const remaining = targetScore - corePts;
    cardioPts = Math.ceil(remaining / 2);
    upperPts = Math.ceil(remaining / 2);
  }

  const cardioReq = convert(cardioPts, cardioTable);
  const upperReq = convert(upperPts, upperTable);
  const coreReq = convert(corePts, coreTable);

  resultsEl.innerHTML = `
    <strong>Minimum Performance to Reach 75:</strong><br><br>
    Cardio (${cardioPts} pts): <strong>${cardioReq}</strong><br>
    Upper Body (${upperPts} pts): <strong>${upperReq} reps</strong><br>
    Core (${corePts} pts): <strong>${coreReq} reps</strong><br><br>
    <em>Approximate standards for planning only.</em>
  `;
}