soil-report-ai/dashboard/crop-analysis/soil-test-data/soil-analysis.php

<?php
/**
 * dashboard/crop-analysis/soil-test-data/soil-analysis.php
 *
 * Soil Analysis Results Display Page
 */

require_once __DIR__.'/../../../config/database.php';
require_once __DIR__.'/../../../lib/auth.php';
require_once __DIR__.'/../../../lib/validation.php';
require_once __DIR__.'/../../../lib/soil_calculations.php';

if (session_status() === PHP_SESSION_NONE) {
    session_start();
}

requireLogin();

$record_id = (float)($_GET['rid']  ?? 0);
$rand_id   = (float)($_GET['rand'] ?? 0);
$client_id = (int)  ($_GET['cid']  ?? 0);

if (!$record_id || !$rand_id) {
    die('Invalid request parameters');
}

try {
    $pdo = getDBConnection();

    // Load soil record
    $stmt = $pdo->prepare("SELECT * FROM soil_records WHERE id = ? AND rand = ?");
    $stmt->execute([$record_id, $rand_id]);
    $row = $stmt->fetch(PDO::FETCH_ASSOC);

    if (!$row) {
        die('Soil record not found');
    }

    // Load matching specifications row for this soil type
    $spec = [];
    if (!empty($row['soil_type'])) {
        $stmtSpec = $pdo->prepare("SELECT * FROM soil_specifications WHERE soil_type = ? LIMIT 1");
        $stmtSpec->execute([$row['soil_type']]);
        $spec = $stmtSpec->fetch(PDO::FETCH_ASSOC) ?: [];
    }

} catch (PDOException $e) {
    error_log("Database error in soil-analysis.php: " . $e->getMessage());
    die('Database error occurred');
}

// ── Helper: render one analysis row ───────────────────────────────────────
/**
 * Renders a <tr> for a single nutrient with three progress-bar columns.
 *
 * Parameters ($p keys):
 *   element   string  Column name in soil_records
 *   sbl       string  Chemical symbol (may contain HTML, e.g. "NO<sub>3</sub>-N")
 *   nutrient  string  Display name (may contain HTML)
 *   min       string  Column in soil_records, numeric literal, or '' for no bar
 *   max       string  Column in soil_records, 'soil_type' (special), numeric literal, or ''
 *   type      string  Unit label (ppm, %, mS/cm …)
 *   text      string  Value cell alignment: c|r|l
 *   rec_text  string  Recommended cell alignment: c|r|l
 *   recV      string  Recommended display: 'n'=none, 'ph'='6.4', 'max'=max only, else=min–max
 *   decimal   int     Decimal places for value
 *   graph     string  CSS class for progress-bar colour
 */
function soilRow(array $row, array $spec, array $p): void
{
    $element  = $p['element']   ?? '';
    $sbl      = $p['sbl']       ?? '';
    $nutrient = $p['nutrient']  ?? '';
    $minParam = $p['min']       ?? '';
    $maxParam = $p['max']       ?? '';
    $type     = $p['type']      ?? '';
    $text     = $p['text']      ?? 'c';
    $recText  = $p['rec_text']  ?? 'c';
    $recV     = $p['recV']      ?? '';
    $decimal  = (int)($p['decimal'] ?? 2);
    $graph    = $p['graph']     ?? '';

    $label  = ($sbl !== '') ? $sbl . ' - ' . $nutrient : $nutrient;
    $rawVal = $row[$element] ?? null;
    $value  = ($rawVal !== null && $rawVal !== '') ? (float)$rawVal : 0.0;
    $valueFmt = number_format($value, $decimal, '.', '') . ($type !== '' ? ' ' . $type : '');

    // Resolve min
    $min = 0.0;
    if ($minParam !== '') {
        if (is_numeric($minParam)) {
            $min = (float)$minParam;
        } elseif (isset($row[$minParam]) && $row[$minParam] !== '') {
            $min = (float)$row[$minParam];
        } elseif (isset($spec[$minParam]) && $spec[$minParam] !== '') {
            $min = (float)$spec[$minParam];
        }
    } elseif (isset($spec[$element]) && $spec[$element] !== '') {
        $min = (float)$spec[$element] / 2;  // fallback: half the spec average
    }

    // Resolve max + recommended display label
    $max = 0.0;
    $maxLabel = '';
    if ($maxParam === 'soil_type') {
        $st = strtolower($row['soil_type'] ?? '');
        $maxLabel = match($st) {
            'light'  => 'Light Soil',
            'medium' => 'Medium Soil',
            'heavy'  => 'Heavy Soil',
            default  => htmlspecialchars($row['soil_type'] ?? '', ENT_QUOTES, 'UTF-8'),
        };
    } elseif ($maxParam !== '') {
        if (is_numeric($maxParam)) {
            $max = (float)$maxParam;
        } elseif (isset($row[$maxParam]) && $row[$maxParam] !== '') {
            $max = (float)$row[$maxParam];
        } elseif (isset($spec[$maxParam]) && $spec[$maxParam] !== '') {
            $max = (float)$spec[$maxParam];
        }
    } elseif (isset($spec[$element]) && $spec[$element] !== '') {
        $max = (float)$spec[$element] * 2;  // fallback: double the spec average
    }

    // Recommended cell text
    $measurement = ($type !== '') ? ' ' . $type : '';
    if ($maxParam === 'soil_type') {
        $recommended = $maxLabel;
    } elseif ($recV === 'n') {
        $recommended = '';
    } elseif ($recV === 'ph') {
        $recommended = '6.4';
    } elseif ($recV === 'max') {
        $recommended = number_format($max, $decimal, '.', '') . $measurement;
    } else {
        $recommended = number_format($min, $decimal, '.', '') . ' - ' . number_format($max, $decimal, '.', '') . $measurement;
    }

    $alignVal = match($text)    { 'r' => 'text-right', 'l' => 'text-left', default => 'text-center' };
    $alignRec = match($recText) { 'r' => 'text-right', 'l' => 'text-left', default => 'text-center' };

    // Bar calculations (replicates original int-cast logic)
    $c_min = $min - ($max - $min);
    $c_max = $max + ($max - $min);
    $hasValue = ($rawVal !== null && $rawVal !== '' && $rawVal !== '0');

    // First bar (deficit zone: c_min → min)
    if (!$hasValue || (int)($c_min - $min) == 0) {
        $fb = 0;
    } else {
        $fb = (int)($c_min - $value) / (int)($c_min - $min) * 100;
    }
    $fb = !$hasValue ? 0 : ($fb > 100 ? 100 : ($fb < 0 ? 2 : $fb));

    // Second bar (ideal zone: min → max)
    if (!$hasValue || (int)($min - $max) == 0) {
        $sb = 0;
    } else {
        $sb = (int)($min - $value) / (int)($min - $max) * 100;
    }
    $sbp = ($fb < 100) ? 0 : ($sb < 0 ? 0 : ($sb > 101 ? 100 : $sb));

    // Third bar (excess zone: max → c_max)
    if (!$hasValue || (int)($max - $c_max) == 0) {
        $tb = 0;
    } else {
        $tb = (int)($max - $value) / (int)($max - $c_max) * 100;
    }
    $tbp = ($sb < 100) ? 0 : ($tb < 0 ? 0 : ($tb > 101 ? 100 : $tb));

    echo "<tr class='sub-chart'>\n";
    echo "  <td class='text-left border-left text-capitalize pl-2'>{$label}</td>\n";
    echo "  <td class='{$alignRec} border-left px-3'>{$recommended}</td>\n";
    echo "  <td class='{$alignVal} border-left nutrient-balance px-3'>{$valueFmt}</td>\n";
    echo "  <td class='text-center border-left graph-border'><div class='progress'><div class='progress-bar {$graph}' style='width:{$fb}%'></div></div></td>\n";
    echo "  <td class='text-center border-left graph-border'><div class='progress'><div class='progress-bar {$graph}' style='width:{$sbp}%'></div></div></td>\n";
    echo "  <td class='text-center border-left border-right graph-border'><div class='progress'><div class='progress-bar {$graph}' style='width:{$tbp}%'></div></div></td>\n";
    echo "</tr>\n";
}

// ── Helper: render a ratio row ─────────────────────────────────────────────
/**
 * Renders a <tr> for a calculated ratio (element ÷ elementTwo).
 *
 * Parameters ($p keys):
 *   element    string  Numerator column in soil_records
 *   elementTwo string  Denominator column in soil_records
 *   sbl        string  Chemical symbol
 *   nutrient   string  Display name
 *   rec        string  Column in soil_specifications for the recommended ratio
 *   type       string  Unit suffix (e.g. ':1')
 *   rec_text   string  Recommended alignment: c|r|l
 *   decimal    int     Decimal places
 *   graph      string  CSS class for progress-bar colour
 */
function soilRatio(array $row, array $spec, array $p): void
{
    $element  = $p['element']    ?? '';
    $element2 = $p['elementTwo'] ?? '';
    $sbl      = $p['sbl']        ?? '';
    $nutrient = $p['nutrient']   ?? '';
    $rec      = $p['rec']        ?? '';
    $type     = $p['type']       ?? '';
    $recText  = $p['rec_text']   ?? 'c';
    $decimal  = (int)($p['decimal'] ?? 1);
    $graph    = $p['graph']      ?? '';

    $label = ($sbl !== '') ? $sbl . ' - ' . $nutrient : $nutrient;
    $val1  = isset($row[$element])  && $row[$element]  !== '' ? (float)$row[$element]  : 0.0;
    $val2  = isset($row[$element2]) && $row[$element2] !== '' ? (float)$row[$element2] : 0.0;
    $ratio = ($val2 != 0) ? $val1 / $val2 : 0.0;

    $valueFmt    = number_format($ratio, $decimal, '.', '') . ($type !== '' ? ' ' . $type : '');
    $recommended = (isset($spec[$rec]) && $spec[$rec] !== '') ? htmlspecialchars($spec[$rec], ENT_QUOTES, 'UTF-8') : '';
    $alignRec    = match($recText) { 'r' => 'text-right', 'l' => 'text-left', default => 'text-center' };

    echo "<tr class='sub-chart'>\n";
    echo "  <td class='text-left border-left text-capitalize pl-2'>{$label}</td>\n";
    echo "  <td class='{$alignRec} border-left px-3'>{$recommended}</td>\n";
    echo "  <td class='text-center border-left nutrient-balance px-3'>{$valueFmt}</td>\n";
    echo "  <td class='text-center border-left graph-border'><div class='progress'><div class='progress-bar {$graph}' style='width:0%'></div></div></td>\n";
    echo "  <td class='text-center border-left graph-border'><div class='progress'><div class='progress-bar {$graph}' style='width:0%'></div></div></td>\n";
    echo "  <td class='text-center border-left border-right graph-border'><div class='progress'><div class='progress-bar {$graph}' style='width:0%'></div></div></td>\n";
    echo "</tr>\n";
}

// ── Page setup ─────────────────────────────────────────────────────────────
$client     = htmlspecialchars($row['client_name']   ?? '', ENT_QUOTES, 'UTF-8');
$address    = htmlspecialchars($row['site_address']   ?? '', ENT_QUOTES, 'UTF-8');
$state      = htmlspecialchars($row['state_postcode'] ?? '', ENT_QUOTES, 'UTF-8');
$email      = htmlspecialchars($row['email']          ?? '', ENT_QUOTES, 'UTF-8');
$labNo      = htmlspecialchars($row['lab_no']         ?? '', ENT_QUOTES, 'UTF-8');
$sampleDate = htmlspecialchars($row['date_sampled']   ?? '', ENT_QUOTES, 'UTF-8');
$sample     = htmlspecialchars($row['site_id']        ?? '', ENT_QUOTES, 'UTF-8');
$crop       = htmlspecialchars($row['sample_id']      ?? '', ENT_QUOTES, 'UTF-8');

$today     = date('jS F Y');
$pageTitle = 'Soil Analysis Results' . ($client !== '' ? ' - ' . $client : '');

include __DIR__.'/../../../layouts/header.php';
?>

<link rel="stylesheet" href="/client-assets/home/css/graphPrint.css" media="print">
<style>
    .progress { border-radius: 0 !important; }
</style>

<div class="container" id="content">

    <div class="row mb-2">
        <div class="col-md-3">
            <img class="img-fluid" src="/client-assets/images/crop-monitor.png" alt="Crop Monitor">
        </div>
    </div>

    <table class="title">
        <tbody>
            <tr>
                <th class="col-20"></th><th class="col-20"></th><th class="col-20"></th>
                <th class="col-20"></th><th class="col-20"></th>
            </tr>
            <tr>
                <td class="right"><b>DATE:</b></td>
                <td class="left"><?= $today ?></td>
                <td></td>
                <td class="right"><b>SAMPLE ID:</b></td>
                <td class="left"><?= $sample ?></td>
            </tr>
            <tr>
                <td class="right"><b>CLIENT:</b></td>
                <td class="left"><?= $client ?></td>
                <td></td>
                <td class="right"><b>DATE SAMPLED:</b></td>
                <td class="left"><?= $sampleDate ?></td>
            </tr>
            <tr>
                <td class="right"><b>ADDRESS:</b></td>
                <td class="left"><?= $address ?></td>
                <td></td>
                <td class="right"><b>LAB NUMBER:</b></td>
                <td class="left"><?= $labNo ?></td>
            </tr>
            <tr>
                <td class="right"></td>
                <td class="left"><?= $state ?></td>
                <td></td>
                <td class="right"><b>CROP:</b></td>
                <td class="left"><?= $crop ?></td>
            </tr>
            <tr>
                <td class="right"></td>
                <td class="left"><?= $email ?></td>
                <td></td><td></td><td></td>
            </tr>
        </tbody>
    </table>

    <div class="d-print-none">
        <div class="row p-2">
            <div class="col">
                <button type="button" class="btn btn-primary" onclick="generateGraph()">
                    <i class="fas fa-chart-bar"></i> Generate Graph
                </button>
            </div>
            <div class="col">
                <div class="form-status-holder"></div>
            </div>
        </div>
    </div>

    <div class="row">
        <div class="col-md-12 text-center fw-bold h4">Soil Analysis Summary</div>
    </div>

    <table class="chart">
        <tbody>

          <!-- ── CHART HEADER ──────────────────────────────────────────── -->
          <tr class="chart-header">
            <th colspan="3" class="text-center col-md-6 border-left border-right border-top">ELEMENT</th>
            <th colspan="3" class="text-center col-md-6 border-right border-top">STATUS</th>
          </tr>
          <tr class="chart-header-sub">
            <th class="text-center col-18 border-left"></th>
            <th class="text-center col-15">DESIRED</th>
            <th class="text-center col-15">FOUND</th>
            <th class="text-center col-16 stripe-1">LIGHT</th>
            <th class="text-center col-16 stripe-1">MEDIUM</th>
            <th class="text-center col-16 border-right stripe-1">HEAVY</th>
          </tr>
          <tr>
            <td class="border-left"></td>
            <td class="border-left"></td>
            <td class="border-left nutrient-balance"></td>
            <td class="border-left"></td>
            <td class="border-left"></td>
            <td class="border-left border-right"></td>
          </tr>

          <?php
          soilRow($row, $spec, ['element'=>'cec', 'nutrient'=>'CEC', 'recV'=>'n', 'decimal'=>2, 'graph'=>'lightorangeGraph']);
          soilRow($row, $spec, ['element'=>'tec', 'nutrient'=>'TEC', 'max'=>'soil_type', 'recV'=>'max', 'rec_text'=>'c', 'decimal'=>2, 'graph'=>'lightorangeGraph']);
          ?>

          <tr class="chart-header-sub">
            <th class="text-center col-18 border-left text-dark bg-white"></th>
            <th class="text-center col-15 border-left text-dark bg-white"></th>
            <th class="text-center col-15 border-left nutrient-balance"></th>
            <th class="text-center col-16 border-left stripe-1">DEFICIT</th>
            <th class="text-center col-16 stripe-1">IDEAL</th>
            <th class="text-center col-16 border-right stripe-1">HIGH</th>
          </tr>

          <?php
          soilRow($row, $spec, ['element'=>'ph_h2o',   'nutrient'=>'pH-level (H20)',   'type'=>'pH',    'recV'=>'ph', 'decimal'=>1, 'graph'=>'lightorangeGraph']);
          soilRow($row, $spec, ['element'=>'ph_cacl2', 'nutrient'=>'pH-level (CaCl2)', 'type'=>'pH',    'recV'=>'n',  'decimal'=>1, 'graph'=>'lightorangeGraph']);
          soilRow($row, $spec, ['element'=>'ec',       'nutrient'=>'Conductivity (EC)','type'=>'mS/cm', 'decimal'=>2, 'graph'=>'lightorangeGraph']);
          soilRow($row, $spec, ['element'=>'ocarbon',  'nutrient'=>'Organic Carbon',   'type'=>'%',     'decimal'=>1, 'graph'=>'lightorangeGraph']);
          soilRow($row, $spec, ['element'=>'omatter',  'nutrient'=>'Organic Matter',   'type'=>'%',     'decimal'=>1, 'graph'=>'lightorangeGraph']);
          ?>

          <!-- ── MAJOR ELEMENTS ─────────────────────────────────────────── -->
          <tr class="chart-header-sub">
            <th colspan="3" class="col-16 border-left text-center lightgreen">MAJOR ELEMENTS</th>
            <th class="text-center col-16 stripe-1"></th>
            <th class="text-center col-16 stripe-1"></th>
            <th class="text-center col-16 border-right stripe-1"></th>
          </tr>

          <?php
          soilRow($row, $spec, ['element'=>'NO3_N',     'sbl'=>'NO<sub>3</sub>-N', 'nutrient'=>'Nitrate <small class="d-print-none">Nitrogen</small>',  'min'=>'10', 'max'=>'20', 'type'=>'ppm', 'text'=>'c', 'rec_text'=>'r', 'decimal'=>0, 'graph'=>'lightgreenGraph']);
          soilRow($row, $spec, ['element'=>'NH3_N',     'sbl'=>'NH<sub>3</sub>-N', 'nutrient'=>'Ammonium <small class="d-print-none">Nitrogen</small>', 'type'=>'ppm', 'text'=>'c', 'rec_text'=>'r', 'decimal'=>0, 'graph'=>'lightgreenGraph']);
          // p_mehlick, p_bray2, p_morgan excluded (commented in original)
          soilRow($row, $spec, ['element'=>'p_colwell',  'sbl'=>'P',  'nutrient'=>'Phosphate <small>(colwell)</small>', 'type'=>'ppm', 'text'=>'c', 'rec_text'=>'r', 'decimal'=>0, 'graph'=>'lightgreenGraph']);
          soilRow($row, $spec, ['element'=>'BS_ca_ppm',  'sbl'=>'Ca', 'nutrient'=>'Calcium',   'min'=>'ca_ppm_min', 'max'=>'ca_ppm_max', 'type'=>'ppm', 'text'=>'c', 'rec_text'=>'r', 'recV'=>'max', 'decimal'=>0, 'graph'=>'lightgreenGraph']);
          soilRow($row, $spec, ['element'=>'BS_mg_ppm',  'sbl'=>'Mg', 'nutrient'=>'Magnesium', 'min'=>'mg_ppm_min', 'max'=>'mg_ppm_max', 'type'=>'ppm', 'text'=>'c', 'rec_text'=>'r', 'recV'=>'max', 'decimal'=>0, 'graph'=>'lightgreenGraph']);
          soilRow($row, $spec, ['element'=>'BS_k_ppm',   'sbl'=>'K',  'nutrient'=>'Potassium', 'min'=>'k_ppm_min',  'max'=>'k_ppm_max',  'type'=>'ppm', 'text'=>'c', 'rec_text'=>'r', 'recV'=>'max', 'decimal'=>0, 'graph'=>'lightgreenGraph']);
          soilRow($row, $spec, ['element'=>'BS_na_ppm',  'sbl'=>'Na', 'nutrient'=>'Sodium',    'min'=>'na_ppm_min', 'max'=>'na_ppm_max', 'type'=>'ppm', 'text'=>'c', 'rec_text'=>'r', 'recV'=>'max', 'decimal'=>0, 'graph'=>'lightgreenGraph']);
          ?>

          <!-- ── TRACE ELEMENTS ─────────────────────────────────────────── -->
          <tr class="chart-header-sub">
            <th colspan="3" class="col-16 border-left text-center lightred">TRACE ELEMENTS</th>
            <th class="text-center col-16 stripe-1"></th>
            <th class="text-center col-16 stripe-1"></th>
            <th class="text-center col-16 border-right stripe-1"></th>
          </tr>

          <?php
          soilRow($row, $spec, ['element'=>'s_morgan', 'sbl'=>'S',  'nutrient'=>'Sulfur',    'type'=>'ppm', 'text'=>'c', 'rec_text'=>'r', 'decimal'=>2, 'graph'=>'lightredGraph']);
          soilRow($row, $spec, ['element'=>'b_cacl2',  'sbl'=>'B',  'nutrient'=>'Boron',     'type'=>'ppm', 'text'=>'c', 'rec_text'=>'r', 'decimal'=>2, 'graph'=>'lightredGraph']);
          soilRow($row, $spec, ['element'=>'mn_dtpa',  'sbl'=>'Mn', 'nutrient'=>'Manganese', 'type'=>'ppm', 'text'=>'c', 'rec_text'=>'r', 'decimal'=>2, 'graph'=>'lightredGraph']);
          soilRow($row, $spec, ['element'=>'cu_dtpa',  'sbl'=>'Cu', 'nutrient'=>'Copper',    'type'=>'ppm', 'text'=>'c', 'rec_text'=>'r', 'decimal'=>2, 'graph'=>'lightredGraph']);
          soilRow($row, $spec, ['element'=>'zn_dtpa',  'sbl'=>'Zn', 'nutrient'=>'Zinc',      'type'=>'ppm', 'text'=>'c', 'rec_text'=>'r', 'decimal'=>2, 'graph'=>'lightredGraph']);
          soilRow($row, $spec, ['element'=>'fe_dtpa',  'sbl'=>'Fe', 'nutrient'=>'Iron',      'type'=>'ppm', 'text'=>'c', 'rec_text'=>'r', 'decimal'=>2, 'graph'=>'lightredGraph']);
          soilRow($row, $spec, ['element'=>'al',       'sbl'=>'Al', 'nutrient'=>'Aluminium', 'type'=>'ppm', 'text'=>'c', 'rec_text'=>'r', 'decimal'=>2, 'graph'=>'lightredGraph']);
          soilRow($row, $spec, ['element'=>'sl_cacl2', 'sbl'=>'Si', 'nutrient'=>'Silicon',   'type'=>'ppm', 'text'=>'c', 'rec_text'=>'r', 'decimal'=>2, 'graph'=>'lightredGraph']);
          ?>

          <!-- ── BASE SATURATION ────────────────────────────────────────── -->
          <tr class="chart-header-sub">
            <th colspan="3" class="col-16 border-left text-center lightpurple">BASE SATURATION</th>
            <th class="text-center col-16 stripe-1"></th>
            <th class="text-center col-16 stripe-1"></th>
            <th class="text-center col-16 border-right stripe-1"></th>
          </tr>

          <?php
          soilRow($row, $spec, ['element'=>'BS_ca2', 'sbl'=>'Ca', 'nutrient'=>'Calcium',   'min'=>'cabs_min', 'max'=>'cabs_max', 'type'=>'%', 'text'=>'c', 'rec_text'=>'r', 'recV'=>'max', 'decimal'=>2, 'graph'=>'lightpurpleGraph']);
          soilRow($row, $spec, ['element'=>'BS_mg2', 'sbl'=>'Mg', 'nutrient'=>'Magnesium', 'min'=>'mgbs_min', 'max'=>'mgbs_max', 'type'=>'%', 'text'=>'c', 'rec_text'=>'r', 'recV'=>'max', 'decimal'=>2, 'graph'=>'lightpurpleGraph']);
          soilRow($row, $spec, ['element'=>'BS_k',   'sbl'=>'K',  'nutrient'=>'Potassium', 'min'=>'kbs_min',  'max'=>'kbs_max',  'type'=>'%', 'text'=>'c', 'rec_text'=>'r', 'recV'=>'max', 'decimal'=>2, 'graph'=>'lightpurpleGraph']);
          soilRow($row, $spec, ['element'=>'BS_na',  'sbl'=>'Na', 'nutrient'=>'Sodium',    'min'=>'nabs_min', 'max'=>'nabs_max', 'type'=>'%', 'text'=>'c', 'rec_text'=>'r', 'recV'=>'max', 'decimal'=>2, 'graph'=>'lightpurpleGraph']);
          soilRow($row, $spec, ['element'=>'BS_ob',  'nutrient'=>'Other Bases', 'max'=>'ob_rec', 'type'=>'%', 'text'=>'c', 'rec_text'=>'r', 'recV'=>'max', 'decimal'=>2, 'graph'=>'lightpurpleGraph']);
          soilRow($row, $spec, ['element'=>'BS_h',   'nutrient'=>'Hydrogen',    'max'=>'h_rec',  'type'=>'%', 'text'=>'c', 'rec_text'=>'r', 'recV'=>'max', 'decimal'=>2, 'graph'=>'lightpurpleGraph']);
          ?>

          <!-- ── SOLUBLE MORGAN 2 EXTRACT ───────────────────────────────── -->
          <tr class="chart-header-sub">
            <th colspan="3" class="col-16 border-left text-center lightgrey">SOLUBLE MORGAN 2 EXTRACT</th>
            <th class="text-center col-16 stripe-1"></th>
            <th class="text-center col-16 stripe-1"></th>
            <th class="text-center col-16 border-right stripe-1"></th>
          </tr>

          <?php
          soilRow($row, $spec, ['element'=>'s_morgan', 'sbl'=>'Ca', 'nutrient'=>'Calcium',   'type'=>'%', 'text'=>'c', 'rec_text'=>'r', 'decimal'=>0, 'graph'=>'lightgreyGraph']);
          soilRow($row, $spec, ['element'=>'b_cacl2',  'sbl'=>'Mg', 'nutrient'=>'Magnesium', 'type'=>'%', 'text'=>'c', 'rec_text'=>'r', 'decimal'=>0, 'graph'=>'lightgreyGraph']);
          soilRow($row, $spec, ['element'=>'mn_dtpa',  'sbl'=>'K',  'nutrient'=>'Potassium', 'type'=>'%', 'text'=>'c', 'rec_text'=>'r', 'decimal'=>0, 'graph'=>'lightgreyGraph']);
          ?>

          <!-- ── ADDITIONAL DATA ────────────────────────────────────────── -->
          <tr class="chart-header-sub">
            <th colspan="3" class="col-16 border-left text-center lightgrey">ADDITIONAL DATA</th>
            <th class="text-center col-16 stripe-1">LOW</th>
            <th class="text-center col-16 stripe-1">IDEAL</th>
            <th class="text-center col-16 border-right stripe-1">EXCELLENT</th>
          </tr>

          <?php
          soilRow($row, $spec, ['element'=>'s_morgan', 'sbl'=>'Ca', 'nutrient'=>'Calcium', 'type'=>'%', 'text'=>'c', 'rec_text'=>'r', 'decimal'=>0, 'graph'=>'lightgreyGraph']);
          ?>

          <!-- ── RATIOS ─────────────────────────────────────────────────── -->
          <tr class="chart-header-sub">
            <th colspan="3" class="col-16 border-left text-center lightblue">RATIOS</th>
            <th class="text-center col-16 stripe-1"></th>
            <th class="text-center col-16 stripe-1"></th>
            <th class="text-center col-16 border-right stripe-1"></th>
          </tr>

          <?php
          soilRatio($row, $spec, ['element'=>'ca_mehlick3', 'elementTwo'=>'mg_mehlick3', 'rec'=>'ca_mg_ratio', 'nutrient'=>'Ca:Mg Ratio',    'rec_text'=>'r', 'decimal'=>1, 'graph'=>'lightblueGraph']);
          soilRow  ($row, $spec, ['element'=>'NH3_N',  'nutrient'=>'Total Nitrogen', 'type'=>'%',  'text'=>'c', 'rec_text'=>'r', 'decimal'=>1, 'graph'=>'lightblueGraph']);
          soilRow  ($row, $spec, ['element'=>'ocarbon', 'nutrient'=>'Total Carbon',  'type'=>'%',  'text'=>'c', 'rec_text'=>'r', 'decimal'=>1, 'graph'=>'lightblueGraph']);
          soilRatio($row, $spec, ['element'=>'ocarbon', 'elementTwo'=>'NO3_N',       'rec'=>'c_n_ratio', 'nutrient'=>'C:N Ratio', 'type'=>':1', 'rec_text'=>'r', 'decimal'=>1, 'graph'=>'lightblueGraph']);
          ?>

          <tr>
            <td class="border-bottom border-left"></td>
            <td class="border-bottom border-left"></td>
            <td class="border-bottom border-left nutrient-balance"></td>
            <td class="border-bottom border-left"></td>
            <td class="border-bottom border-left"></td>
            <td class="border-bottom border-left border-right"></td>
          </tr>

        </tbody>
    </table>

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        <div class="container-fluid px-4">
            <div class="d-flex align-items-center justify-content-between small">
                <div class="text-muted">&copy; <?= date('Y') ?> Crop Management Platform. All Rights Reserved.</div>
                <div>
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</div><!-- /.container -->

<script>
function generateGraph() {
    alert('Graph generation functionality will be implemented here.');
}

$(document).ready(function () {
    var timeoutId;
    $('form textarea, form input').on('input propertychange change', function () {
        clearTimeout(timeoutId);
        timeoutId = setTimeout(saveToDB, 1000);
    });

    function saveToDB() {
        var form = $('.report-form');
        $.ajax({
            url:  '/controllers/save_soil_analysis.php',
            type: 'POST',
            data: form.serialize(),
            beforeSend: function () { $('.form-status-holder').html('Saving...'); },
            success: function () {
                var d = new Date();
                $('.form-status-holder').html('Saved! Last: ' + d.toLocaleTimeString());
            }
        });
    }

    $('.report-form').submit(function (e) {
        saveToDB();
        e.preventDefault();
    });
});
</script>