<?php // phpcs:ignoreFile

require __DIR__ . '/../../session.php';
require __DIR__ . '/../../userAccess.php';
require __DIR__ . '/../../items.php';

$pageTitle = 'Daily Total Target';
$pageSubtitle = 'See how hard we need to push to hit today\'s goal';
$pageDescription = 'Calculate the tons-per-hour needed to reach the daily tonnage goal before the 5 a.m. reset.';
$assetBasePath = '../../';
$layoutWithoutSidebar = true;
$layoutReturnUrl = '../../overview.php';
$layoutReturnLabel = 'Back to overview';

$appTimeZone = new DateTimeZone('America/Chicago');
$dailyResetHour = 5;

function sanitizeFloat($value, float $default = 0.0): float
{
    if ($value === null || $value === '') {
        return $default;
    }

    $filtered = filter_var($value, FILTER_VALIDATE_FLOAT);

    return $filtered === false ? $default : (float) $filtered;
}

function sanitizeTarget($value): float
{
    $target = sanitizeFloat($value, 22000.0);

    return max(0.0, $target);
}

function calculateWindow(DateTimeZone $tz, int $resetHour): array
{
    $now = new DateTimeImmutable('now', $tz);
    $todayReset = $now->setTime($resetHour, 0, 0);

    if ($now < $todayReset) {
        $start = $todayReset->modify('-1 day');
        $end = $todayReset;
    } else {
        $start = $todayReset;
        $end = $todayReset->modify('+1 day');
    }

    $secondsTotal = max(1, $end->getTimestamp() - $start->getTimestamp());
    $secondsElapsed = max(
        0,
        min($secondsTotal, $now->getTimestamp() - $start->getTimestamp())
    );
    $secondsRemaining = $secondsTotal - $secondsElapsed;

    return [
        'now' => $now,
        'start' => $start,
        'end' => $end,
        'secondsElapsed' => $secondsElapsed,
        'secondsRemaining' => $secondsRemaining,
        'hoursElapsed' => $secondsElapsed / 3600,
        'hoursRemaining' => $secondsRemaining / 3600,
        'hoursTotal' => $secondsTotal / 3600,
    ];
}

function buildResult(
    float $targetTons,
    float $alreadyGround,
    float $projectedRest,
    float $hoursRemaining
): array {
    $neededTonnage = max(0.0, $targetTons - $alreadyGround);
    $requiredRate = $hoursRemaining > 0 ? $neededTonnage / $hoursRemaining : 0.0;
    $projectedRest = max(0.0, $projectedRest);
    $projectedRate = $hoursRemaining > 0 ? $projectedRest / $hoursRemaining : 0.0;

    $projectedTotal = $alreadyGround + $projectedRest;
    $projectedShortfall = max(0.0, $targetTons - $projectedTotal);
    $deltaRate = max(0.0, $requiredRate - $projectedRate);

    return [
        'targetTons' => $targetTons,
        'alreadyGround' => $alreadyGround,
        'projectedRest' => $projectedRest,
        'hoursRemaining' => $hoursRemaining,
        'neededTonnage' => $neededTonnage,
        'projectedTotal' => $projectedTotal,
        'projectedShortfall' => $projectedShortfall,
        'requiredRate' => $requiredRate,
        'projectedRate' => $projectedRate,
        'deltaRate' => $deltaRate,
    ];
}

$liveGroundTons = null;
if (isset($value['CANETOT'], $value['W TONS GROUND'])) {
    $liveGroundTons = (float) $value['CANETOT'] + (float) $value['W TONS GROUND'];
}

$defaultGround = $liveGroundTons ?? 0.0;

$projectedTotal = null;
$projectedIncludePath = __DIR__ . '/../../includes/millprojected60min.php';
if (is_file($projectedIncludePath)) {
  // Reuse the existing include by buffering its echoed total and keeping its relative paths intact.
    $previousCwd = getcwd();
    $includeDir = dirname($projectedIncludePath);

    if ($includeDir !== false && is_dir($includeDir)) {
        chdir($includeDir);
    }

    ob_start();
    include $projectedIncludePath;
    $projectedRaw = trim(ob_get_clean());

    if ($previousCwd !== false && is_dir($previousCwd)) {
        chdir($previousCwd);
    }

    if ($projectedRaw !== '' && is_numeric($projectedRaw)) {
        $projectedTotal = (float) $projectedRaw;
    }
}

$defaultProjectedCarry = 0.0;
if ($projectedTotal !== null) {
    $alreadyGroundForCarry = $liveGroundTons ?? 0.0;
    $defaultProjectedCarry = max(0.0, $projectedTotal - $alreadyGroundForCarry);
}

$formInput = [
  'target' => sanitizeTarget($_POST['target'] ?? 22000),
  'ground' => sanitizeFloat(
    array_key_exists('ground', $_POST) ? $_POST['ground'] : $defaultGround,
    $defaultGround
  ),
  'projected' => sanitizeFloat(
    array_key_exists('projected', $_POST) ? $_POST['projected'] : $defaultProjectedCarry,
    $defaultProjectedCarry
  ),
];

$window = calculateWindow($appTimeZone, $dailyResetHour);
$result = buildResult(
    $formInput['target'],
    $formInput['ground'],
    $formInput['projected'],
    $window['hoursRemaining']
);

$targetDeadlineLabel = $window['end']->format('g:i A T');

require __DIR__ . '/../../includes/layout/header.php';
?>

<div class="app-content">
  <section class="data-panel">
    <header class="panel-header">
      <h2>Daily total target checker</h2>
      <p>
        Enter today&#39;s ground tonnage, your current projection, and the target
        to see the tons-per-hour required by
        <?php echo htmlspecialchars($targetDeadlineLabel); ?>.
      </p>
    </header>

    <form method="post" class="target-form">
      <div class="target-grid">
        <label class="target-field">
          <span class="target-label">Target tonnage</span>
          <input
            type="number"
            name="target"
            step="100"
            min="0"
            value="<?php echo htmlspecialchars((string) $formInput['target']); ?>"
          >
        </label>

        <label class="target-field">
          <span class="target-label">Tons ground so far</span>
          <input
            type="number"
            name="ground"
            step="1"
            min="0"
            value="<?php echo htmlspecialchars((string) $formInput['ground']); ?>"
          >
        </label>

        <label class="target-field">
          <span class="target-label">Projected tons remaining (current pace)</span>
          <input
            type="number"
            name="projected"
            step="1"
            min="0"
            value="<?php echo htmlspecialchars((string) $formInput['projected']); ?>"
          >
        </label>
      </div>

      <div class="target-actions">
        <button type="submit" class="button button--success">
          Calculate required rate
        </button>
      </div>
    </form>

    <div class="target-results">
      <div class="target-result-card">
        <span class="target-result-label">Hours remaining</span>
        <span class="target-result-value">
          <?php echo number_format($window['hoursRemaining'], 2); ?> h
        </span>
      </div>

      <div class="target-result-card">
        <span class="target-result-label">Target shortfall</span>
        <span class="target-result-value">
          <?php echo number_format($result['neededTonnage'], 0); ?> tons
        </span>
      </div>

      <div class="target-result-card">
        <span class="target-result-label">Projected carry</span>
        <span class="target-result-value">
          <?php echo number_format($result['projectedRest'], 0); ?> tons
        </span>
      </div>

      <div class="target-result-card">
        <span class="target-result-label">Projected shortfall</span>
        <span class="target-result-value">
          <?php echo number_format($result['projectedShortfall'], 0); ?> tons
        </span>
      </div>

      <div class="target-result-card">
        <span class="target-result-label">Current pace</span>
        <span class="target-result-value">
          <?php echo number_format($result['projectedRate'], 2); ?> tph
        </span>
      </div>

      <div class="target-result-card target-result-card--primary">
        <span class="target-result-label">Required rate</span>
        <span class="target-result-value">
          <?php echo number_format($result['requiredRate'], 2); ?> tph
        </span>
      </div>

      <div class="target-result-card target-result-card--delta">
        <span class="target-result-label">Additional rate needed</span>
        <span class="target-result-value">
          <?php echo number_format($result['deltaRate'], 2); ?> tph
        </span>
      </div>
    </div>

    <div class="target-footnote">
      <p>
        Calculations assume the 24-hour window resets at 5:00 a.m. Central.
        Required rate uses the remaining hours
        (<?php echo number_format($window['hoursRemaining'], 2); ?> h).
        Projected shortfall compares the target against the current ground
        tonnage plus the forecast carry at today&#39;s pace.
      </p>
    </div>
  </section>
</div>

<?php require __DIR__ . '/../../includes/layout/footer.php'; ?>