feat: complaint Extract Codes button with SNOMED chip review panel

- Add 'Extract Codes' button to complaint lookup input
- Parse free-text with duration/severity extraction (regex: 3 days, moderate etc)
- Call Opd_prescription/complaints_extract endpoint -> local SNOMED FULLTEXT
- Render inline chip cards: term, concept_id, duration, severity, confidence%
- Doctor clicks confirm (green tick) or reject (red x) per chip in seconds
- Confirm pre-fills duration+severity in complaint table row automatically
- 'Confirm All' bulk action; Dismiss clears panel
- Add complaints_extract controller method + parseComplaintFreeText helper
- Add route Opd_prescription/complaints_extract

app/Config/Routes.php

@@ -591,6 +591,7 @@ $routes->get('Opd_prescription/fhir_bundle_history/(:num)/(:num)', 'Opd_prescrip
 $routes->get('Opd_prescription/fhir_bundle_preview/(:num)', 'Opd_prescription::fhir_bundle_preview/$1');
 $routes->get('Opd_prescription/fhir_bundle_preview/(:num)/(:num)', 'Opd_prescription::fhir_bundle_preview/$1/$2');
 $routes->get('Opd_prescription/complaints_search', 'Opd_prescription::complaints_search');
+$routes->get('Opd_prescription/complaints_extract', 'Opd_prescription::complaints_extract');
 $routes->get('Opd_prescription/section_recent_entries', 'Opd_prescription::section_recent_entries');
 $routes->get('Opd_prescription/provisional_diagnosis_search', 'Opd_prescription::provisional_diagnosis_search');
 $routes->get('Opd_prescription/diagnosis_search', 'Opd_prescription::provisional_diagnosis_search');

app/Controllers/Opd_prescription.php

@@ -4489,6 +4489,112 @@ class Opd_prescription extends BaseController
         return $this->response->setJSON(['rows' => array_slice($out, 0, 20)]);
     }
 
+    /**
+     * Extract SNOMED codes from free-text complaint string.
+     * Parses duration/severity from each phrase, searches local SNOMED FULLTEXT.
+     *
+     * GET Opd_prescription/complaints_extract?q=headache+3+days+moderate,+fever+mild
+     */
+    public function complaints_extract()
+    {
+        $q = trim((string) $this->request->getGet('q'));
+        if ($q === '') {
+            return $this->response->setJSON(['rows' => []]);
+        }
+
+        $phrases = $this->parseComplaintFreeText($q);
+        $svc     = new CsnotkTerminologyService();
+        $out     = [];
+        $seen    = [];
+
+        foreach ($phrases as $p) {
+            $cleanTerm = trim($p['term']);
+            if (mb_strlen($cleanTerm) < 2) {
+                continue;
+            }
+
+            $results = $svc->searchFinding($cleanTerm, 3);
+            foreach ($results as $r) {
+                $cid = trim((string) ($r['concept_id'] ?? ''));
+                $dedupeKey = mb_strtoupper($r['term'] ?? '') . '|' . $cid;
+                if (isset($seen[$dedupeKey])) {
+                    continue;
+                }
+                $seen[$dedupeKey] = true;
+
+                $out[] = [
+                    'term'         => (string) ($r['term'] ?? ''),
+                    'concept_id'   => $cid,
+                    'semantic_tag' => (string) ($r['hierarchy'] ?? ''),
+                    'confidence'   => round(0.75, 3), // local FULLTEXT match scores high by default
+                    'duration'     => $p['duration'],
+                    'severity'     => $p['severity'],
+                    'source_phrase'=> $p['original'],
+                ];
+            }
+
+            if (count($out) >= 8) {
+                break;
+            }
+        }
+
+        return $this->response->setJSON(['rows' => $out]);
+    }
+
+    /**
+     * Parse a free-text complaint string into structured phrases.
+     * Extracts duration (e.g. "3 days", "since yesterday") and severity (mild/moderate/severe)
+     * from each comma/semicolon-delimited phrase.
+     *
+     * @return array<int,array{term:string,duration:string,severity:string,original:string}>
+     */
+    private function parseComplaintFreeText(string $text): array
+    {
+        $durationRe = '/(?:since\s+|for\s+the\s+last\s+|for\s+last\s+|for\s+)?(\d+[\s\u00a0]*(?:hour|day|week|month|year)s?|since\s+(?:yesterday|morning|evening|last\s+\w+)|past\s+\d+\s*(?:day|week|month|year)s?)/iu';
+        $severityRe = '/\b(mild|moderate|severe|slight|intense|chronic|acute|persistent|intermittent|recurrent)\b/iu';
+
+        // Split on common delimiters
+        $parts = preg_split('/[,;\/\n]|\s+and\s+|\s+with\s+/iu', $text) ?: [$text];
+
+        $result = [];
+        foreach ($parts as $part) {
+            $part = trim($part);
+            if ($part === '') {
+                continue;
+            }
+            $original = $part;
+
+            $duration = '';
+            if (preg_match($durationRe, $part, $m)) {
+                $duration = trim($m[0]);
+                $part = trim((string) preg_replace($durationRe, ' ', $part, 1));
+            }
+
+            $severity = '';
+            if (preg_match($severityRe, $part, $m)) {
+                $severity = mb_strtolower($m[1]);
+                $part = trim((string) preg_replace($severityRe, ' ', $part, 1));
+            }
+
+            $cleanTerm = trim((string) preg_replace('/\s+/', ' ', $part));
+            if (mb_strlen($cleanTerm) >= 2) {
+                $result[] = [
+                    'term'     => $cleanTerm,
+                    'duration' => $duration,
+                    'severity' => $severity,
+                    'original' => $original,
+                ];
+            }
+        }
+
+        // If parsing produced nothing usable, fall back to original string
+        if (empty($result)) {
+            $result[] = ['term' => $text, 'duration' => '', 'severity' => '', 'original' => $text];
+        }
+
+        return $result;
+    }
+
     public function provisional_diagnosis_search()
     {
         $q = trim((string) $this->request->getGet('q'));

app/Views/billing/opd_prescription_basic.php

@@ -294,6 +294,33 @@
             background: #2b6cb0;
             color: #fff;
         }
+        /* SNOMED extract chips */
+        .snomed-chip {
+            display: inline-flex;
+            align-items: center;
+            gap: 5px;
+            background: #eff6ff;
+            border: 1px solid #bfdbfe;
+            border-radius: 999px;
+            padding: 3px 8px 3px 10px;
+            font-size: .8rem;
+            transition: background .15s, border-color .15s;
+        }
+        .snomed-chip.chip-confirmed {
+            background: #dcfce7;
+            border-color: #86efac;
+        }
+        .snomed-chip.chip-rejected { display: none; }
+        .snomed-chip .chip-term { font-weight: 600; color: #1d4ed8; }
+        .snomed-chip .chip-code { font-family: monospace; color: #6b7280; font-size: .7rem; }
+        .snomed-chip .chip-meta { color: #059669; font-size: .75rem; }
+        .snomed-chip .chip-conf { background: #e0e7ff; color: #3730a3; border-radius: 3px; padding: 0 4px; font-size: .68rem; margin-left: 2px; }
+        .chip-btn { background: none; border: none; padding: 0 2px; cursor: pointer; line-height: 1; font-size: .9rem; }
+        .chip-btn-confirm { color: #16a34a; }
+        .chip-btn-confirm:hover { color: #15803d; }
+        .chip-btn-reject  { color: #dc2626; }
+        .chip-btn-reject:hover  { color: #b91c1c; }
+        .chip-btn:disabled { opacity: .4; cursor: default; }
         .btn-complaints-mic {
             border-color: #13795b;
             color: #13795b;
@@ -831,7 +858,9 @@
                                     <div class="input-group input-group-sm">
                                         <input type="text" class="form-control" id="complaint_lookup"
                                                autocomplete="off"
-                                               placeholder="Type symptom: headache, fever, chest pain...">
+                                               placeholder="Type symptom or free text: headache 3 days moderate, fever 1 day...">
+                                        <button type="button" class="btn btn-outline-primary" id="btn_extract_complaint_codes"
+                                                title="Extract SNOMED codes from typed text with duration &amp; severity">Extract Codes</button>
                                         <button type="button" class="btn btn-outline-secondary btn-save-autotype-keyword"
                                                 data-section="complaints" data-target="complaints" title="Save as custom keyword">+keyword</button>
                                     </div>
@@ -839,6 +868,16 @@
                                          style="display:none;position:absolute;left:0;right:0;top:100%;z-index:1060;max-height:260px;overflow-y:auto;"></div>
                                 </div>
 
+                                <!-- SNOMED Extract chips panel -->
+                                <div id="complaint_extract_panel" class="mb-2 p-2 border rounded" style="display:none;background:#f8faff;">
+                                    <div class="d-flex align-items-center gap-2 mb-2">
+                                        <span class="small fw-semibold text-primary">💡 Code Suggestions</span>
+                                        <button type="button" class="btn btn-sm btn-success py-0 px-2" id="btn_confirm_all_chips" style="font-size:.75rem">✓ Confirm All</button>
+                                        <button type="button" class="btn btn-sm btn-outline-secondary py-0 px-2" id="btn_dismiss_extract" style="font-size:.75rem">Dismiss</button>
+                                    </div>
+                                    <div id="complaint_chips_wrap" class="d-flex flex-wrap gap-2"></div>
+                                </div>
+
                                 <!-- Complaint rows table -->
                                 <table class="table table-sm table-bordered align-middle mb-1" id="complaint_table" style="display:none;font-size:.82rem">
                                     <thead class="table-light" style="font-size:.75rem">
@@ -4757,6 +4796,106 @@
         return true;
     }
 
+    // ─── Extract Codes from free-text (SNOMED chips review) ─────────────────
+    $('#btn_extract_complaint_codes').on('click', function () {
+        var text = $.trim($('#complaint_lookup').val());
+        if (!text) { $('#complaint_lookup').trigger('focus'); return; }
+
+        var $btn   = $(this);
+        var $panel = $('#complaint_extract_panel');
+        var $wrap  = $('#complaint_chips_wrap');
+
+        $btn.prop('disabled', true).text('Extracting…');
+        $panel.show();
+        $wrap.html('<span class="text-muted small">Searching SNOMED…</span>');
+
+        $.get('<?= base_url('Opd_prescription/complaints_extract') ?>', { q: text })
+            .done(function (data) {
+                $btn.prop('disabled', false).text('Extract Codes');
+                var rows = (data && data.rows) ? data.rows : [];
+
+                if (!rows.length) {
+                    $wrap.html('<span class="text-muted small">No SNOMED match. Added as free text.</span>');
+                    addComplaintItem({ name: text, concept_id: '', source: 'local' });
+                    setTimeout(function () { $panel.hide(); $wrap.empty(); }, 1800);
+                    return;
+                }
+
+                $wrap.empty();
+                rows.forEach(function (r) {
+                    var pct  = Math.round((parseFloat(r.confidence) || 0) * 100);
+                    var meta = [r.duration, r.severity].filter(Boolean).join(' · ');
+
+                    var $chip = $('<span class="snomed-chip"></span>');
+                    $chip.append($('<span class="chip-term"></span>').text(r.term || r.snomed_term || ''));
+                    if (r.concept_id) {
+                        $chip.append($('<span class="chip-code"></span>').text(' ' + r.concept_id));
+                    }
+                    if (meta) {
+                        $chip.append($('<span class="chip-meta"></span>').text(' · ' + meta));
+                    }
+                    if (pct > 0) {
+                        $chip.append($('<span class="chip-conf"></span>').text(pct + '%'));
+                    }
+
+                    var $bConfirm = $('<button type="button" class="chip-btn chip-btn-confirm" title="Add complaint">✓</button>');
+                    var $bReject  = $('<button type="button" class="chip-btn chip-btn-reject"  title="Dismiss">✕</button>');
+
+                    $bConfirm.on('click', function () {
+                        var added = addComplaintItem({
+                            name:      r.term || r.snomed_term || text,
+                            concept_id: r.concept_id || '',
+                            source:    r.concept_id ? 'snomed' : 'local',
+                            hierarchy: r.hierarchy || r.semantic_tag || ''
+                        });
+                        // Pre-fill duration & severity on the new table row
+                        var newIdx = selectedComplaintItems.length - 1;
+                        if (newIdx >= 0) {
+                            if (r.duration) {
+                                selectedComplaintItems[newIdx].duration = r.duration;
+                                $('#complaint_tbody .complaint-dur-input[data-idx="' + newIdx + '"]').val(r.duration);
+                            }
+                            if (r.severity) {
+                                selectedComplaintItems[newIdx].severity = r.severity;
+                                $('#complaint_tbody .complaint-sev-input[data-idx="' + newIdx + '"]').val(r.severity);
+                            }
+                            syncComplaintSnomedJson();
+                        }
+                        $chip.addClass('chip-confirmed');
+                        $bConfirm.prop('disabled', true);
+                        $bReject.hide();
+                        // Clear the lookup input after first confirmation
+                        $('#complaint_lookup').val('');
+                    });
+
+                    $bReject.on('click', function () {
+                        $chip.addClass('chip-rejected');
+                        if (!$wrap.find('.snomed-chip:not(.chip-rejected)').length) {
+                            $panel.hide(); $wrap.empty();
+                        }
+                    });
+
+                    $chip.append($bConfirm).append($bReject);
+                    $wrap.append($chip);
+                });
+            })
+            .fail(function () {
+                $btn.prop('disabled', false).text('Extract Codes');
+                $wrap.html('<span class="text-danger small">Search failed.</span>');
+            });
+    });
+
+    $('#btn_confirm_all_chips').on('click', function () {
+        $('#complaint_chips_wrap .snomed-chip:not(.chip-rejected):not(.chip-confirmed) .chip-btn-confirm').each(function () {
+            $(this).trigger('click');
+        });
+    });
+
+    $('#btn_dismiss_extract').on('click', function () {
+        $('#complaint_extract_panel').hide();
+        $('#complaint_chips_wrap').empty();
+    });
+
     // ─── Per-complaint inline editor — stubs (table replaced the panel) ─────
     function openComplaintInlineEditor(idx) {
         setTimeout(function() {