package main

import (
	"encoding/json"
	"fmt"
	"net/http"
	"sort"
	"strconv"
	"strings"
	"time"
	"inou/lib"
)

// DossierSection represents a unified section block on the dossier page
type DossierSection struct {
	ID          string        // "imaging", "labs", "genetics", etc.
	Icon        string        // emoji or icon identifier
	Color       string        // hex color for indicator (without #)
	HeadingKey  string        // translation key for heading
	Heading     string        // resolved heading text
	Summary     string        // summary line
	ActionURL   string        // optional button URL
	ActionLabel string        // optional button label (translation key resolved)
	Items       []SectionItem // the actual data rows
	HideEmpty   bool          // hide entire section when no items
	ComingSoon  bool          // show as coming soon
	Dynamic     bool          // loaded via JS (like genetics)
	DynamicType string        // "genetics" for special handling
	CustomHTML  string        // for completely custom sections (privacy)
	Searchable bool          // show search/filter box in header
	ChartData  string        // JSON chart data (vitals)
	// Checkin-specific: show "build your profile" prompt
	ShowBuildTracker bool              // true if trackable categories are empty
	TrackableStats  map[string]int    // counts for trackable categories
	TrackerButtons   []TrackerButton    // buttons for empty trackable categories
}

// TrackerButton for the "build your profile" section
type TrackerButton struct {
	Label string
	Icon  string
	URL   string
}

// SectionItem represents a row in a section
type SectionItem struct {
	ID              string
	Label           string
	Meta            string // secondary text below label
	Date            string // YYYYMMDD format for JS formatting
	Time            string // "20:06 -0400" — shown alongside Date when present
	Type            string
	Value           string
	LinkURL         string
	LinkTitle       string
	Expandable      bool
	Expanded        bool
	Children        []SectionItem
	SourceSpansJSON string // JSON-encoded source spans for doc pane highlighting
}

// SectionConfig defines how to build a section for a category
type SectionConfig struct {
	ID          string
	Category    int
	Color       string
	HeadingKey  string
	HideEmpty   bool
	ComingSoon  bool
	Dynamic     bool
	DynamicType string
}

// Standard section configurations
var sectionConfigs = []SectionConfig{
	{ID: "checkin", HeadingKey: "section_checkin", Color: "B45309"},
	{ID: "imaging", Category: lib.CategoryImaging, Color: "B45309", HeadingKey: "section_imaging", HideEmpty: false},
	{ID: "labs", Category: lib.CategoryLab, Color: "059669", HeadingKey: "section_labs", HideEmpty: false},
	{ID: "documents", Category: lib.CategoryDocument, Color: "06b6d4", HeadingKey: "section_records", HideEmpty: true},
	{ID: "procedures", Category: lib.CategorySurgery, Color: "DC2626", HeadingKey: "section_procedures", HideEmpty: true},
	{ID: "assessments", Category: lib.CategoryAssessment, Color: "7C3AED", HeadingKey: "section_assessments", HideEmpty: true},
	{ID: "genetics", Category: lib.CategoryGenome, Color: "8B5CF6", HeadingKey: "section_genetics", HideEmpty: true, Dynamic: true, DynamicType: "genetics"},
	{ID: "medications", Category: lib.CategoryMedication, Color: "8b5cf6", HeadingKey: "section_medications", HideEmpty: true},
	{ID: "supplements", Category: lib.CategorySupplement, Color: "8b5cf6", HeadingKey: "section_supplements", HideEmpty: true},
	{ID: "symptoms", Category: lib.CategorySymptom, Color: "F59E0B", HeadingKey: "section_symptoms", HideEmpty: true},
	{ID: "hospitalizations", Category: lib.CategoryHospital, Color: "EF4444", HeadingKey: "section_hospitalizations", HideEmpty: true},
	{ID: "therapies", Category: lib.CategoryTherapy, Color: "10B981", HeadingKey: "section_therapies", HideEmpty: true},
	{ID: "consultations", Category: lib.CategoryConsultation, Color: "3B82F6", HeadingKey: "section_consultations", HideEmpty: true},
	{ID: "diagnoses", Category: lib.CategoryDiagnosis, Color: "EF4444", HeadingKey: "section_diagnoses", HideEmpty: true},
	{ID: "exercise", Category: lib.CategoryExercise, Color: "22C55E", HeadingKey: "section_exercise", HideEmpty: true},
	{ID: "nutrition", Category: lib.CategoryNutrition, Color: "F97316", HeadingKey: "section_nutrition", HideEmpty: true},
	{ID: "fertility", Category: lib.CategoryFertility, Color: "EC4899", HeadingKey: "section_fertility", HideEmpty: true},
	{ID: "notes", Category: lib.CategoryNote, Color: "6B7280", HeadingKey: "section_notes", HideEmpty: true},
	{ID: "history", Category: lib.CategoryHistory, Color: "6B7280", HeadingKey: "section_history", HideEmpty: true},
	{ID: "family_history", Category: lib.CategoryFamilyHistory, Color: "6B7280", HeadingKey: "section_family_history", HideEmpty: true},
	{ID: "birth", Category: lib.CategoryBirth, Color: "EC4899", HeadingKey: "section_birth", HideEmpty: true},
	{ID: "devices", Category: lib.CategoryDevice, Color: "6366F1", HeadingKey: "section_devices", HideEmpty: true},
	{ID: "providers", Category: lib.CategoryProvider, Color: "0EA5E9", HeadingKey: "section_providers", HideEmpty: true},
	{ID: "questions", Category: lib.CategoryQuestion, Color: "8B5CF6", HeadingKey: "section_questions", HideEmpty: true},
	{ID: "vitals", Category: lib.CategoryVital, Color: "ec4899", HeadingKey: "section_vitals", HideEmpty: true},
	{ID: "privacy", HeadingKey: "section_privacy", Color: "64748b"},
}

type chartRef struct {
	RefLow    float64 `json:"refLow"`
	RefHigh   float64 `json:"refHigh"`
	Direction string  `json:"direction,omitempty"`
}

// vitalRef returns US reference range for a body composition metric by sex.
// Sex: 1=male, 2=female (ISO 5218). Returns nil if no reference data.
// Direction: "higher_better" = only lower bound matters, "lower_better" = only upper bound, "" = both.
func vitalRef(metricType string, sex int) *chartRef {
	type ref struct{ low, high float64; dir string }
	// US reference ranges: [male, female]
	// Sources: WHO (BMI), ACE/ACSM (body fat), Tanita (visceral fat)
	ranges := map[string][2]ref{
		"bmi":              {{18.5, 24.9, ""}, {18.5, 24.9, ""}},
		"body_fat":         {{10, 22, ""}, {20, 33, ""}},
		"visceral_fat":     {{0, 12, "lower_better"}, {0, 12, "lower_better"}},
		"subcutaneous_fat": {{0, 19, "lower_better"}, {0, 28, "lower_better"}},
		"water":            {{50, 0, "higher_better"}, {45, 0, "higher_better"}},
		"muscle":           {{33, 0, "higher_better"}, {24, 0, "higher_better"}},
		"skeletal_muscle":  {{33, 0, "higher_better"}, {24, 0, "higher_better"}},
		"bone":             {{2.5, 0, "higher_better"}, {1.8, 0, "higher_better"}},
		"protein":          {{16, 0, "higher_better"}, {16, 0, "higher_better"}},
	}
	r, ok := ranges[metricType]
	if !ok {
		return nil
	}
	idx := 0
	if sex == 2 {
		idx = 1
	}
	return &chartRef{RefLow: r[idx].low, RefHigh: r[idx].high, Direction: r[idx].dir}
}

// BuildDossierSections builds all sections for a dossier
func BuildDossierSections(targetID, targetHex string, target *lib.Dossier, p *lib.Dossier, lang string, canEdit bool) []DossierSection {
	T := func(key string) string { return translations[lang][key] }
	
	var sections []DossierSection
	
	for _, cfg := range sectionConfigs {
		section := DossierSection{
			ID:         cfg.ID,
			Color:      cfg.Color,
			HeadingKey: cfg.HeadingKey,
			Heading:    T(cfg.HeadingKey),
			HideEmpty:  cfg.HideEmpty,
			ComingSoon: cfg.ComingSoon,
			Dynamic:    cfg.Dynamic,
			DynamicType: cfg.DynamicType,
		}
		
		switch cfg.ID {
		case "checkin":
			section.ActionURL = fmt.Sprintf("/dossier/%s/trackers", targetHex)
			section.ActionLabel = T("open")
			
			// Count trackable categories
			stats := make(map[string]int)
			vitals, _ := lib.EntryList(lib.SystemAccessorID, "", lib.CategoryVital, &lib.EntryFilter{DossierID: targetID, Limit: 1})
			meds, _ := lib.EntryList(lib.SystemAccessorID, "", lib.CategoryMedication, &lib.EntryFilter{DossierID: targetID, Limit: 1})
			supps, _ := lib.EntryList(lib.SystemAccessorID, "", lib.CategorySupplement, &lib.EntryFilter{DossierID: targetID, Limit: 1})
			exercise, _ := lib.EntryList(lib.SystemAccessorID, "", lib.CategoryExercise, &lib.EntryFilter{DossierID: targetID, Limit: 1})
			symptoms, _ := lib.EntryList(lib.SystemAccessorID, "", lib.CategorySymptom, &lib.EntryFilter{DossierID: targetID, Limit: 1})
			
			stats["vitals"] = len(vitals)
			stats["medications"] = len(meds)
			stats["supplements"] = len(supps)
			stats["exercise"] = len(exercise)
			stats["symptoms"] = len(symptoms)
			section.TrackableStats = stats
			
			// Check if any trackable data exists
			hasData := len(vitals) > 0 || len(meds) > 0 || len(supps) > 0 || len(exercise) > 0 || len(symptoms) > 0
			
			if hasData {
				// Compact summary showing what's tracked
				section.Summary = T("checkin_summary")
			} else {
				// Show build profile prompt
				section.ShowBuildTracker = true
				section.Summary = T("checkin_build_profile")
				promptsURL := fmt.Sprintf("/dossier/%s/trackers", targetHex)
				section.TrackerButtons = []TrackerButton{
					{Label: T("btn_vitals"), URL: promptsURL + "?add=vital"},
					{Label: T("btn_medications"), URL: promptsURL + "?add=medication"},
					{Label: T("btn_supplements"), URL: promptsURL + "?add=supplement"},
					{Label: T("btn_exercise"), URL: promptsURL + "?add=exercise"},
				}
			}
			
		case "imaging":
			studies, _ := fetchStudiesWithSeries(targetHex)
			section.Items, section.Summary = buildImagingItems(studies, targetHex, target.DossierID, lang, T)
			if len(studies) > 0 {
				section.ActionURL = fmt.Sprintf("/viewer/?token=%s", target.DossierID)
				section.ActionLabel = T("open_viewer")
			}
			
		case "labs":
			orders, _ := lib.EntryQueryOld(targetID, lib.CategoryLab, "lab_order")
			sort.Slice(orders, func(i, j int) bool { return orders[i].Timestamp > orders[j].Timestamp })
			section.Searchable = len(orders) > 0
			if len(orders) == 0 {
				section.Summary = T("no_lab_data")
			} else {
				section.Heading = pluralT(len(orders), cfg.HeadingKey, lang)
				for _, order := range orders {
					item := SectionItem{
						ID:         order.EntryID,
						Label:      order.Value,
						Expandable: true,
					}
					var odata struct {
						LocalTime         string `json:"local_time"`
						SummaryTranslated string `json:"summary_translated"`
					}
					if json.Unmarshal([]byte(order.Data), &odata) == nil {
						if odata.LocalTime != "" {
							if t, err := time.Parse(time.RFC3339, odata.LocalTime); err == nil {
								item.Date = t.Format("20060102")
								if t.Hour() != 0 || t.Minute() != 0 {
									_, offset := t.Zone()
									item.Time = fmt.Sprintf("%02d:%02d %s", t.Hour(), t.Minute(), offsetToTZName(offset))
								}
							}
						}
						if odata.SummaryTranslated != "" {
							item.Meta = odata.SummaryTranslated
						}
					}
					if item.Date == "" && order.Timestamp > 0 {
						item.Date = time.Unix(order.Timestamp, 0).UTC().Format("20060102")
					}
					section.Items = append(section.Items, item)
				}
			}
			
		case "documents":
			entries, _ := lib.EntryList(lib.SystemAccessorID, "", lib.CategoryDocument, &lib.EntryFilter{DossierID: targetID, Limit: 50})
			section.Items = docEntriesToSectionItems(entries)
			section.Heading = pluralT(len(entries), cfg.HeadingKey, lang)

		case "procedures":
			entries, _ := lib.EntryList(lib.SystemAccessorID, "", lib.CategorySurgery, &lib.EntryFilter{DossierID: targetID, Limit: 50})
			section.Items = entriesToSectionItems(entries)
			section.Heading = pluralT(len(entries), cfg.HeadingKey, lang)

		case "assessments":
			entries, _ := lib.EntryList(lib.SystemAccessorID, "", lib.CategoryAssessment, &lib.EntryFilter{DossierID: targetID, Limit: 50})
			section.Items = entriesToSectionItems(entries)
			section.Heading = pluralT(len(entries), cfg.HeadingKey, lang)

		case "genetics":
			genomeEntries, _ := lib.EntryList(lib.SystemAccessorID, "", lib.CategoryGenome, &lib.EntryFilter{DossierID: targetID, Limit: 1})
			if len(genomeEntries) > 0 {
				section.Summary = "Loading..."
			} else {
				section.Dynamic = false // no data: let HideEmpty hide the section
			}
			// Items loaded dynamically via JS
			
		case "vitals":
			// Load group containers (depth 2) — each is a metric type
			groups, _ := lib.EntryRead(lib.SystemAccessorID, targetID, &lib.Filter{Category: lib.CategoryVital, Type: "root"})
			if len(groups) > 0 {
				metrics, _ := lib.EntryRead(lib.SystemAccessorID, targetID, &lib.Filter{Category: lib.CategoryVital, ParentID: groups[0].EntryID})
				type chartPoint struct {
					Date int64   `json:"date"` // unix seconds
					Val  float64 `json:"val"`
				}
				type chartMetric struct {
					Name   string       `json:"name"`
					Type   string       `json:"type"`
					Unit   string       `json:"unit"`
					Points []chartPoint `json:"points"`
					Ref    *chartRef    `json:"ref,omitempty"`
				}
				var chartMetrics []chartMetric
				for _, g := range metrics {
					readings, _ := lib.EntryRead(lib.SystemAccessorID, targetID, &lib.Filter{
						Category: lib.CategoryVital,
						Type:     "reading",
						ParentID: g.EntryID,
					})
					latest := ""
					latestDate := ""
					var points []chartPoint
					unit := ""
					for _, r := range readings {
						if r.Timestamp > 0 {
							// Parse numeric value from summary like "94.5 kg"
							parts := strings.SplitN(r.Summary, " ", 2)
							if v, err := strconv.ParseFloat(parts[0], 64); err == nil {
								points = append(points, chartPoint{Date: r.Timestamp, Val: v})
								if unit == "" && len(parts) > 1 {
									unit = parts[1]
								}
							}
						}
						latest = r.Summary
						if r.Timestamp > 0 {
							latestDate = time.Unix(r.Timestamp, 0).UTC().Format("2006-01-02")
						}
					}
					section.Items = append(section.Items, SectionItem{
						ID:    g.EntryID,
						Label: g.Summary,
						Value: latest,
						Date:  latestDate,
					})
					if len(points) > 0 {
						cm := chartMetric{Name: g.Summary, Type: g.Type, Unit: unit, Points: points}
						cm.Ref = vitalRef(g.Type, target.Sex)
						chartMetrics = append(chartMetrics, cm)
					}
				}
				section.Summary = fmt.Sprintf("%d metrics", len(metrics))
				if len(chartMetrics) > 0 {
					if b, err := json.Marshal(chartMetrics); err == nil {
						section.ChartData = string(b)
					}
				}
			}
			
		case "privacy":
			// Handled separately - needs access list, not entries
			continue
			
		default:
			// Generic handler for any category with a Category set
			if cfg.Category > 0 {
				entries, _ := lib.EntryList(lib.SystemAccessorID, "", cfg.Category, &lib.EntryFilter{DossierID: targetID, Limit: 50})
				section.Items = entriesToSectionItems(entries)
				section.Heading = pluralT(len(entries), cfg.HeadingKey, lang)
			}
		}
		
		// Skip empty sections if configured to hide
		if section.HideEmpty && len(section.Items) == 0 && !section.Dynamic && !section.ComingSoon && section.ID != "checkin" {
			continue
		}
		
		sections = append(sections, section)
	}
	
	return sections
}

// pluralT returns a translated plural string like "3 slices" using translation keys.
// Keys: "{key}_one", "{key}_few" (Russian 2-4), "{key}_other".
// Falls back: few->other, missing key->English.
func pluralT(n int, key, lang string) string {
	T := func(k string) string {
		if t, ok := translations[lang]; ok {
			if s, ok := t[k]; ok { return s }
		}
		if t, ok := translations["en"]; ok {
			if s, ok := t[k]; ok { return s }
		}
		return k
	}

	form := pluralForm(n, lang)
	s := T(key + "_" + form)
	if !strings.Contains(s, "%d") {
		if n > 1 {
			return fmt.Sprintf("%d %s", n, s)
		}
		return s
	}
	return fmt.Sprintf(s, n)
}

func pluralForm(n int, lang string) string {
	switch lang {
	case "ru":
		mod10, mod100 := n%10, n%100
		if mod10 == 1 && mod100 != 11 {
			return "one"
		}
		if mod10 >= 2 && mod10 <= 4 && (mod100 < 12 || mod100 > 14) {
			return "few"
		}
		return "other"
	default:
		if n == 1 {
			return "one"
		}
		return "other"
	}
}

func offsetToTZName(offset int) string {
	switch offset {
	case -4 * 3600:
		return "EDT"
	case -5 * 3600:
		return "EST"
	case -6 * 3600:
		return "CST"
	case -7 * 3600:
		return "MST"
	case -8 * 3600:
		return "PST"
	case 0:
		return "UTC"
	case 1 * 3600:
		return "CET"
	case 2 * 3600:
		return "CEST"
	case 3 * 3600:
		return "MSK"
	default:
		h := offset / 3600
		m := (offset % 3600) / 60
		if m < 0 {
			m = -m
		}
		return fmt.Sprintf("%+03d%02d", h, m)
	}
}

// buildImagingItems converts studies to section items
func buildImagingItems(studies []Study, targetHex, dossierID, lang string, T func(string) string) ([]SectionItem, string) {
	var items []SectionItem
	var totalSlices int
	
	for _, s := range studies {
		totalSlices += s.SliceCount
		
		item := SectionItem{
			ID:         s.ID,
			Label:      s.Description,
			Date:       s.Date,
			LinkURL:    fmt.Sprintf("/viewer/?token=%s&study=%s", dossierID, s.ID),
			LinkTitle:  T("open_viewer"),
			Expandable: s.SeriesCount > 1,
		}
		
		// Add series as children
		for _, series := range s.Series {
			if series.SliceCount > 0 {
				label := series.Description
				if label == "" {
					label = series.Modality
				}
				child := SectionItem{
					ID:        series.ID,
					Label:     label,
					Value:     pluralT(series.SliceCount, "slice", lang),
					LinkURL:   fmt.Sprintf("/viewer/?token=%s&study=%s&series=%s", dossierID, s.ID, series.ID),
					LinkTitle: T("open_viewer"),
				}
				item.Children = append(item.Children, child)
			}
		}
		
		if !item.Expandable {
			// Single series - show slice count, no expand
			item.Children = nil
			item.Value = pluralT(s.SliceCount, "slice", lang)
		} else {
			item.Value = pluralT(s.SeriesCount, "series", lang)
		}
		
		items = append(items, item)
	}
	
	var summary string
	if len(studies) > 0 {
		summary = fmt.Sprintf("%d studies, %d slices", len(studies), totalSlices)
	}
	
	return items, summary
}

// buildLabItems creates parent/child lab section items
func buildLabItems(dossierID, lang string, T func(string) string) ([]SectionItem, string) {
	// Get lab orders (parents)
	orders, _ := lib.EntryQueryOld(dossierID, lib.CategoryLab, "lab_order")

	// Also get standalone lab results (no parent)
	allLabs, _ := lib.EntryList(lib.SystemAccessorID, "", lib.CategoryLab, &lib.EntryFilter{DossierID: dossierID, Limit: 5000})
	var standalones []*lib.Entry
	for _, e := range allLabs {
		if e.ParentID == "" && e.Type != "lab_order" {
			standalones = append(standalones, e)
		}
	}

	if len(orders) == 0 && len(standalones) == 0 {
		return nil, T("no_lab_data")
	}

	var items []SectionItem
	var totalTests int

	// Process lab orders with children
	for _, order := range orders {
		// Get children for this order
		children, _ := lib.EntryChildren(dossierID, order.EntryID)
		totalTests += len(children)

		item := SectionItem{
			ID:         order.EntryID,
			Label:      order.Value,
			Expandable: len(children) > 0,
		}

		// Use original local_time from Data JSON if available
		var data struct {
			LocalTime         string `json:"local_time"`
			SummaryTranslated string `json:"summary_translated"`
		}
		if json.Unmarshal([]byte(order.Data), &data) == nil {
			if data.LocalTime != "" {
				if t, err := time.Parse(time.RFC3339, data.LocalTime); err == nil {
					item.Date = t.Format("20060102")
					if t.Hour() != 0 || t.Minute() != 0 {
						_, offset := t.Zone()
						item.Time = fmt.Sprintf("%02d:%02d %s", t.Hour(), t.Minute(), offsetToTZName(offset))
					}
				} else {
					fmt.Printf("[DEBUG] Failed to parse local_time for %s: %s (err: %v)\n", order.EntryID, data.LocalTime, err)
				}
			}
			if data.SummaryTranslated != "" {
				item.Meta = data.SummaryTranslated
			}
		}

		// Fallback: if date still not set, use timestamp
		if item.Date == "" && order.Timestamp > 0 {
			t := time.Unix(order.Timestamp, 0).UTC()
			item.Date = t.Format("20060102")
			fmt.Printf("[DEBUG] Set date from timestamp for %s: %s -> %s\n", order.EntryID, order.Value, item.Date)
		}

		if item.Date == "" {
			fmt.Printf("[DEBUG] No date set for order %s: %s (timestamp: %d, local_time: %s)\n", order.EntryID, order.Value, order.Timestamp, data.LocalTime)
		}

		if len(children) > 0 {
			item.Value = pluralT(len(children), "result", lang)
			for _, c := range children {
				var childData struct {
					Loinc             string `json:"loinc"`
					SummaryTranslated string `json:"summary_translated"`
				}
				json.Unmarshal([]byte(c.Data), &childData)

				child := SectionItem{
					Label: c.Summary,
					Type:  childData.Loinc,
					Meta:  childData.SummaryTranslated,
				}
				item.Children = append(item.Children, child)
			}
		}

		items = append(items, item)
	}

	// Add standalone lab results
	for _, standalone := range standalones {
		var data struct {
			Loinc string `json:"loinc"`
		}
		json.Unmarshal([]byte(standalone.Data), &data)

		item := SectionItem{
			ID:    standalone.EntryID,
			Label: standalone.Summary,
			Type:  data.Loinc, // Store LOINC for search matching
		}

		// Set date from timestamp
		if standalone.Timestamp > 0 {
			t := time.Unix(standalone.Timestamp, 0).UTC()
			item.Date = t.Format("20060102")
		}

		items = append(items, item)
		totalTests++
	}

	summary := fmt.Sprintf("%s, %s", pluralT(len(orders), "order", lang), pluralT(totalTests, "result", lang))
	return items, summary
}

// docEntriesToSectionItems converts document entries to section items with preview links.
func docEntriesToSectionItems(entries []*lib.Entry) []SectionItem {
	var items []SectionItem
	for _, e := range entries {
		if e == nil {
			continue
		}
		item := SectionItem{
			ID:        e.EntryID,
			Label:     e.Value,
			Type:      e.Type,
			LinkURL:   e.EntryID,
			LinkTitle: "source",
		}
		if e.Timestamp > 0 {
			item.Date = time.Unix(e.Timestamp, 0).UTC().Format("20060102")
		}
		items = append(items, item)
	}
	return items
}

// entriesToSectionItems converts Entry slice to SectionItem slice.
// Entries with Data fields become expandable with details as children.
func entriesToSectionItems(entries []*lib.Entry) []SectionItem {
	// Internal Data keys that shouldn't be shown to the user
	skipKeys := map[string]bool{
		"source_doc_id":      true,
		"source":             true,
		"source_spans":       true,
		"summary_translated": true,
		"data_translated":    true,
	}

	var items []SectionItem
	for _, e := range entries {
		if e == nil {
			continue
		}
		// Use Summary as label when Value is empty (common for doc extracts)
		label := e.Value
		if label == "" {
			label = e.Summary
		}
		item := SectionItem{
			ID:    e.EntryID,
			Label: label,
			Type:  e.Type,
		}
		if e.Timestamp > 0 {
			item.Date = time.Unix(e.Timestamp, 0).UTC().Format("20060102")
		}

		// Parse Data to build expandable children
		if e.Data != "" {
			var dataMap map[string]interface{}
			if json.Unmarshal([]byte(e.Data), &dataMap) == nil {
				// Use translated data values when available
				translated, _ := dataMap["data_translated"].(map[string]interface{})

				// Collect keys in deterministic order: preferred fields first, then alphabetical
				var keys []string
				for k := range dataMap {
					if !skipKeys[k] {
						keys = append(keys, k)
					}
				}
				sort.Slice(keys, func(i, j int) bool {
					pi, pj := dataFieldPriority(keys[i]), dataFieldPriority(keys[j])
					if pi != pj {
						return pi < pj
					}
					return keys[i] < keys[j]
				})
				for _, k := range keys {
					val := formatDataValue(k, dataMap[k])
					if val == "" {
						continue
					}
					child := SectionItem{Label: k, Value: val}
					if translated != nil {
						if tv := formatDataValue(k, translated[k]); tv != "" && tv != val {
							child.Meta = tv
						}
					}
					item.Children = append(item.Children, child)
				}
				if len(item.Children) > 0 {
					item.Expandable = true
				}
				// Link to source document
				if docID, ok := dataMap["source_doc_id"].(string); ok && docID != "" {
					item.LinkURL = docID
					item.LinkTitle = "source"
				}
				// Source spans for doc pane highlighting
				if spans, ok := dataMap["source_spans"]; ok {
					if b, err := json.Marshal(spans); err == nil {
						item.SourceSpansJSON = string(b)
					}
				}
				// Show translation as secondary text
				if tr, ok := dataMap["summary_translated"].(string); ok && tr != "" {
					item.Meta = tr
				}
			}
		}

		items = append(items, item)
	}
	return items
}

// dataFieldPriority returns sort priority for data field keys (lower = first).
func dataFieldPriority(key string) int {
	order := map[string]int{
		"name": 1, "role": 2, "specialty": 3, "institution": 4,
		"procedure": 5, "diagnosis": 5, "condition": 5, "therapy": 5,
		"facility": 6, "surgeon": 6, "provider": 6,
		"date": 7, "frequency": 8, "duration": 8,
		"details": 10, "description": 10, "notes": 10,
		"phone": 11, "address": 12,
	}
	if p, ok := order[key]; ok {
		return p
	}
	return 9 // unlisted keys go before details/address
}

// formatDataValue renders a Data field value as a display string.
func formatDataValue(key string, v interface{}) string {
	switch val := v.(type) {
	case string:
		return val
	case float64:
		if val == float64(int(val)) {
			return fmt.Sprintf("%d", int(val))
		}
		return fmt.Sprintf("%g", val)
	case bool:
		if val {
			return "yes"
		}
		return "no"
	case map[string]interface{}:
		// Flatten nested objects (e.g. settings: {pressure: "5 cmH₂O"})
		var parts []string
		for k, sv := range val {
			s := formatDataValue(k, sv)
			if s != "" {
				parts = append(parts, k+": "+s)
			}
		}
		return strings.Join(parts, ", ")
	default:
		return ""
	}
}

// buildLoincNameMap builds a JSON map of LOINC code → full test name
// for displaying full names in charts.
func buildLoincNameMap() string {
	var tests []lib.LabTest
	if err := lib.RefQuery("SELECT loinc_id, name FROM lab_test", nil, &tests); err != nil {
		return "{}"
	}

	// Map: loinc → name
	nameMap := make(map[string]string)
	for _, test := range tests {
		nameMap[test.LoincID] = test.Name
	}

	b, _ := json.Marshal(nameMap)
	return string(b)
}

// buildLabSearchIndex builds a JSON map of search terms → LOINC codes
// for client-side lab result filtering. Keys are lowercase test names and abbreviations.
func buildLabSearchIndex() string {
	var tests []lib.LabTest
	if err := lib.RefQuery("SELECT loinc_id, name FROM lab_test", nil, &tests); err != nil {
		return "{}"
	}

	// Map: lowercase name → []loinc
	index := make(map[string][]string)

	// Index by test names from lab_test table
	for _, test := range tests {
		name := strings.ToLower(test.Name)
		words := strings.Fields(name)

		// Index by full name
		if !contains(index[name], test.LoincID) {
			index[name] = append(index[name], test.LoincID)
		}

		// Index by individual words (for partial matching)
		for _, word := range words {
			// Strip parentheses from words like "(MCV)" -> "mcv"
			word = strings.Trim(word, "()")
			if len(word) >= 3 { // Skip short words
				if !contains(index[word], test.LoincID) {
					index[word] = append(index[word], test.LoincID)
				}
			}
		}
	}

	// Also index by abbreviations from actual lab entries
	// Get unique LOINC+abbreviation pairs from all lab entries with parent
	entries, err2 := lib.LabEntryListForIndex()
	if err2 == nil {
		seen := make(map[string]bool) // Track LOINC+abbr pairs to avoid duplicates
		for _, e := range entries {
			var data struct {
				Loinc        string `json:"loinc"`
				Abbreviation string `json:"abbreviation"`
			}
			if json.Unmarshal([]byte(e.Data), &data) == nil && data.Loinc != "" && data.Abbreviation != "" {
				key := data.Loinc + "|" + data.Abbreviation
				if !seen[key] {
					// Strip parentheses and convert to lowercase
					abbr := strings.ToLower(strings.Trim(data.Abbreviation, "()"))
					if abbr != "" && !contains(index[abbr], data.Loinc) {
						index[abbr] = append(index[abbr], data.Loinc)
					}
					seen[key] = true
				}
			}
		}
	}

	b, _ := json.Marshal(index)
	return string(b)
}

func contains(slice []string, item string) bool {
	for _, s := range slice {
		if s == item {
			return true
		}
	}
	return false
}

// buildLabRefData builds a JSON map of test abbreviation → reference data
// for the chart JS to use. Keys are abbreviations (e.g. "WBC", "Hgb").
func buildLabRefData(dossierID string, dob time.Time, sex int) string {
	type refInfo struct {
		Direction string  `json:"direction"`
		RefLow    float64 `json:"refLow"`
		RefHigh   float64 `json:"refHigh"`
	}

	result := make(map[string]refInfo)

	// Load all lab child entries to get unique loinc → abbreviation mappings
	entries, err := lib.EntryQueryOld(dossierID, lib.CategoryLab, "")
	if err != nil {
		return "{}"
	}

	// Build loinc → abbreviation + si_factor map from entries
	type testInfo struct {
		abbr     string
		siFactor float64
	}
	loincMap := make(map[string]testInfo) // loinc → {abbr, siFactor}

	for _, e := range entries {
		if e.ParentID == "" {
			continue
		}
		var data struct {
			Loinc    string  `json:"loinc"`
			Abbr     string  `json:"abbreviation"`
			SIFactor float64 `json:"si_factor"`
		}
		if json.Unmarshal([]byte(e.Data), &data) != nil || data.Loinc == "" || data.Abbr == "" {
			continue
		}
		if _, exists := loincMap[data.Loinc]; !exists {
			factor := data.SIFactor
			if factor == 0 {
				factor = 1.0
			}
			loincMap[data.Loinc] = testInfo{abbr: data.Abbr, siFactor: factor}
		}
	}

	// Patient's current age in days (for reference range lookup)
	ageDays := int64(0)
	if !dob.IsZero() {
		ageDays = lib.AgeDays(dob.Unix(), time.Now().Unix())
	}

	// Convert sex int to CALIPER format
	sexStr := ""
	switch sex {
	case 1:
		sexStr = "M"
	case 2:
		sexStr = "F"
	}

	// For each unique loinc, look up lab_test (direction) and lab_reference (ranges)
	for loinc, info := range loincMap {
		test, err := lib.LabTestGet(loinc)
		if err != nil || test == nil {
			continue
		}

		ref, err := lib.LabRefLookup(loinc, sexStr, ageDays)
		if err != nil || ref == nil {
			continue
		}

		// Convert SI reference values back to original unit for chart display
		low := lib.FromLabScale(ref.RefLow) / info.siFactor
		high := lib.FromLabScale(ref.RefHigh) / info.siFactor

		result[info.abbr] = refInfo{
			Direction: test.Direction,
			RefLow:    low,
			RefHigh:   high,
		}
	}

	b, _ := json.Marshal(result)
	return string(b)
}

// formatSize formats bytes to human readable
func formatSize(bytes int64) string {
	if bytes < 1024 {
		return fmt.Sprintf("%d B", bytes)
	} else if bytes < 1024*1024 {
		return fmt.Sprintf("%.1f KB", float64(bytes)/1024)
	}
	return fmt.Sprintf("%.1f MB", float64(bytes)/(1024*1024))
}

// handleDocumentView returns the markdown content of a document entry.
// GET /dossier/{dossierID}/document/{docID}
func handleDocumentView(w http.ResponseWriter, r *http.Request) {
	p := getLoggedInDossier(r)
	if p == nil {
		http.Error(w, "Unauthorized", http.StatusUnauthorized)
		return
	}
	parts := strings.Split(r.URL.Path, "/")
	// /dossier/{id}/document/{docID} → parts[2]=id, parts[4]=docID
	if len(parts) < 5 {
		http.NotFound(w, r)
		return
	}
	targetID := parts[2]
	docID := parts[4]

	// RBAC check
	if _, err := lib.DossierGet(p.DossierID, targetID); err != nil {
		http.Error(w, "Forbidden", http.StatusForbidden)
		return
	}

	entry, err := lib.EntryGet(nil, docID)
	if err != nil || entry.DossierID != targetID || entry.Category != lib.CategoryDocument {
		http.NotFound(w, r)
		return
	}

	// Serve original PDF if ?pdf=1
	if r.URL.Query().Get("pdf") == "1" {
		var docData struct {
			SourceUpload string `json:"source_upload"`
		}
		json.Unmarshal([]byte(entry.Data), &docData)
		if docData.SourceUpload == "" {
			http.Error(w, "No PDF available", http.StatusNotFound)
			return
		}
		uploadEntry, err := lib.EntryGet(nil, docData.SourceUpload)
		if err != nil {
			http.Error(w, "Upload not found", http.StatusNotFound)
			return
		}
		var uploadData struct {
			Path string `json:"path"`
		}
		json.Unmarshal([]byte(uploadEntry.Data), &uploadData)
		if uploadData.Path == "" {
			http.Error(w, "No file path", http.StatusNotFound)
			return
		}
		pdfBytes, err := lib.DecryptFile(uploadData.Path)
		if err != nil {
			http.Error(w, "Decrypt failed", http.StatusInternalServerError)
			return
		}
		w.Header().Set("Content-Type", "application/pdf")
		w.Header().Set("Content-Disposition", fmt.Sprintf(`inline; filename="%s"`, entry.Value))
		w.Write(pdfBytes)
		return
	}

	var data struct {
		Markdown            string `json:"markdown"`
		MarkdownTranslated  string `json:"markdown_translated"`
		TranslatedTo        string `json:"translated_to"`
		SourceUpload        string `json:"source_upload"`
	}
	json.Unmarshal([]byte(entry.Data), &data)

	resp := map[string]interface{}{
		"markdown": data.Markdown,
		"title":    entry.Value,
		"has_pdf":  data.SourceUpload != "",
	}
	if data.MarkdownTranslated != "" {
		resp["markdown_translated"] = data.MarkdownTranslated
		resp["translated_to"] = data.TranslatedTo
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(resp)
}

// handleDossierV2 renders the new unified dossier page
func handleDossierV2(w http.ResponseWriter, r *http.Request) {
	p := getLoggedInDossier(r)
	if p == nil { http.Redirect(w, r, "/", http.StatusSeeOther); return }
	
	// Parse path: /dossier/{id}/v2
	parts := strings.Split(r.URL.Path, "/")
	if len(parts) < 3 || parts[2] == "" { http.NotFound(w, r); return }
	
	targetID := parts[2]
	targetHex := formatHexID(targetID)
	
	// RBAC-checked read
	target, err := lib.DossierGet(p.DossierID, targetID)
	if err != nil { http.Error(w, "Forbidden", http.StatusForbidden); return }
	isSelf := targetID == p.DossierID
	canEdit := isSelf
	if !isSelf {
		if access, found := getAccess(formatHexID(p.DossierID), targetHex); found {
			canEdit = access.CanEdit
		}
	}
	
	lang := getLang(r)
	showDetails := isSelf
	canManageAccess := isSelf
	
	// Build access list (for privacy section)
	accessRecords, _ := listAccessors(targetHex)
	var accessList []AccessEntry
	for _, ar := range accessRecords {
		accessList = append(accessList, AccessEntry{
			DossierID: ar.Accessor,
			Name:      ar.Name,
			Relation:  T(lang, "rel_" + fmt.Sprintf("%d", ar.Relation)),
			CanEdit:   ar.CanEdit,
			IsSelf:    ar.Accessor == p.DossierID,
		})
	}
	
	// Check for genome
	genomeEntries, _ := lib.EntryList(lib.SystemAccessorID, "", lib.CategoryGenome, &lib.EntryFilter{DossierID: targetID, Limit: 1})
	hasGenome := len(genomeEntries) > 0
	
	// Build sections
	sections := BuildDossierSections(targetID, targetHex, target, p, lang, canEdit)
	
	render(w, r, PageData{
		Page:            "dossier",
		Lang:            lang,
		Embed:           isEmbed(r),
		Dossier:         p,
		TargetDossier:   target,
		ShowDetails:     showDetails,
		CanManageAccess: canManageAccess,
		CanEdit:         canEdit,
		AccessList:      accessList,
		HasGenome:       hasGenome,
		Sections:        sections,
	})
}

// handleLabCommentary generates AI commentary for lab trend charts.
// POST /dossier/{id}/labs/commentary
// Body: {"series":[{"name":"Cholesterol","abbr":"CHOL","unit":"mg/dL","points":[{"date":"2024-01-15","val":210},...],"refLow":0,"refHigh":200,"direction":"lower_better"}]}
// Returns: {"commentary":{"CHOL":"Cholesterol dropped 15% from 210 to 180 mg/dL since January — now within normal range.",...}}
func handleLabCommentary(w http.ResponseWriter, r *http.Request) {
	p := getLoggedInDossier(r)
	if p == nil { http.Error(w, "Unauthorized", http.StatusUnauthorized); return }
	if r.Method != "POST" { http.Error(w, "Method not allowed", 405); return }
	if lib.AnthropicKey == "" {
		http.Error(w, "AI commentary unavailable", 503)
		return
	}

	var body struct {
		Series []struct {
			Name      string `json:"name"`
			Abbr      string `json:"abbr"`
			Unit      string `json:"unit"`
			Direction string `json:"direction"`
			RefLow    float64 `json:"refLow"`
			RefHigh   float64 `json:"refHigh"`
			Points    []struct {
				Date string  `json:"date"`
				Val  float64 `json:"val"`
			} `json:"points"`
		} `json:"series"`
	}
	if err := json.NewDecoder(r.Body).Decode(&body); err != nil || len(body.Series) == 0 {
		http.Error(w, "Invalid request", 400)
		return
	}

	// Build compact prompt
	var sb strings.Builder
	sb.WriteString("You are a medical data analyst. For each lab metric below, write ONE concise sentence (max 20 words) describing the trend for a patient. Focus on: direction (up/down/stable), magnitude (% or absolute change), and whether it's moving toward or away from the normal range. Use plain language, no jargon. Do NOT give medical advice or diagnoses.\n\n")
	sb.WriteString("Format your response as JSON: {\"ABBR\": \"sentence\", ...}\n\n")
	sb.WriteString("Metrics:\n")
	for _, s := range body.Series {
		if len(s.Points) < 2 { continue }
		first := s.Points[0]
		last := s.Points[len(s.Points)-1]
		pct := 0.0
		if first.Val != 0 { pct = (last.Val - first.Val) / first.Val * 100 }
		var refStr string
		if s.RefHigh > 0 || s.RefLow > 0 {
			refStr = fmt.Sprintf(", normal range: %.1f–%.1f %s", s.RefLow, s.RefHigh, s.Unit)
		}
		sb.WriteString(fmt.Sprintf("- %s (%s): %.1f→%.1f %s (%+.0f%%) from %s to %s%s\n",
			s.Name, s.Abbr, first.Val, last.Val, s.Unit, pct, first.Date, last.Date, refStr))
	}

	reqBody, _ := json.Marshal(map[string]interface{}{
		"model":      "claude-haiku-4-5",
		"max_tokens": 512,
		"messages": []map[string]interface{}{
			{"role": "user", "content": sb.String()},
		},
	})

	req, err := http.NewRequest("POST", "https://api.anthropic.com/v1/messages", strings.NewReader(string(reqBody)))
	if err != nil { http.Error(w, "Request error", 500); return }
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("x-api-key", lib.AnthropicKey)
	req.Header.Set("anthropic-version", "2023-06-01")

	resp, err := http.DefaultClient.Do(req)
	if err != nil { http.Error(w, "API error", 502); return }
	defer resp.Body.Close()

	var result struct {
		Content []struct{ Text string `json:"text"` } `json:"content"`
		Error   struct{ Message string `json:"message"` } `json:"error"`
	}
	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil || len(result.Content) == 0 {
		http.Error(w, "Bad API response", 502)
		return
	}
	if resp.StatusCode != 200 {
		http.Error(w, "API error: "+result.Error.Message, 502)
		return
	}

	// Parse the JSON response from Claude (it may be wrapped in markdown code fence)
	raw := strings.TrimSpace(result.Content[0].Text)
	raw = strings.TrimPrefix(raw, "```json")
	raw = strings.TrimPrefix(raw, "```")
	raw = strings.TrimSuffix(raw, "```")
	raw = strings.TrimSpace(raw)

	var commentary map[string]string
	if err := json.Unmarshal([]byte(raw), &commentary); err != nil {
		// Return the raw text as a fallback under "_raw"
		w.Header().Set("Content-Type", "application/json")
		json.NewEncoder(w).Encode(map[string]interface{}{"commentary": map[string]string{"_raw": raw}})
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(map[string]interface{}{"commentary": commentary})
}

// handleLabSearch serves lab data as JSON.
// GET /dossier/{id}/labs?order={entryID}  — children for one order (expand)
// GET /dossier/{id}/labs?q=sodium         — search across all orders
func handleLabSearch(w http.ResponseWriter, r *http.Request) {
	p := getLoggedInDossier(r)
	if p == nil { http.Error(w, "Unauthorized", http.StatusUnauthorized); return }

	parts := strings.Split(r.URL.Path, "/")
	if len(parts) < 3 { http.NotFound(w, r); return }
	targetID := parts[2]

	target, err := lib.DossierGet(p.DossierID, targetID)
	if err != nil { http.Error(w, "Forbidden", http.StatusForbidden); return }

	type childJSON struct {
		Label string `json:"label"`
		Loinc string `json:"loinc"`
	}
	type refInfo struct {
		Direction string  `json:"direction"`
		RefLow    float64 `json:"refLow"`
		RefHigh   float64 `json:"refHigh"`
	}
	type abbrInfo struct {
		abbr     string
		siFactor float64
	}

	// Shared: build ref data from loinc→abbr map
	buildRefs := func(loincAbbrs map[string]abbrInfo) map[string]refInfo {
		refs := make(map[string]refInfo)
		ageDays := int64(0)
		if !target.DOB.IsZero() {
			ageDays = lib.AgeDays(target.DOB.Unix(), time.Now().Unix())
		}
		sexStr := ""
		switch target.Sex {
		case 1: sexStr = "M"
		case 2: sexStr = "F"
		}
		for loinc, info := range loincAbbrs {
			test, err := lib.LabTestGet(loinc)
			if err != nil || test == nil { continue }
			ref, err := lib.LabRefLookup(loinc, sexStr, ageDays)
			if err != nil || ref == nil { continue }
			low := lib.FromLabScale(ref.RefLow) / info.siFactor
			high := lib.FromLabScale(ref.RefHigh) / info.siFactor
			refs[info.abbr] = refInfo{Direction: test.Direction, RefLow: low, RefHigh: high}
		}
		return refs
	}

	// Shared: extract child JSON + track loinc abbreviations
	childToJSON := func(entries []*lib.Entry, loincAbbrs map[string]abbrInfo) []childJSON {
		var out []childJSON
		for _, c := range entries {
			var data struct {
				Loinc string  `json:"loinc"`
				Abbr  string  `json:"abbreviation"`
				SIF   float64 `json:"si_factor"`
			}
			json.Unmarshal([]byte(c.Data), &data)
			out = append(out, childJSON{Label: c.Summary, Loinc: data.Loinc})
			if data.Loinc != "" && data.Abbr != "" {
				if _, exists := loincAbbrs[data.Loinc]; !exists {
					f := data.SIF
					if f == 0 { f = 1.0 }
					loincAbbrs[data.Loinc] = abbrInfo{abbr: data.Abbr, siFactor: f}
				}
			}
		}
		return out
	}

	w.Header().Set("Content-Type", "application/json")

	// Mode 1: expand a single order
	if orderID := r.URL.Query().Get("order"); orderID != "" {
		children, _ := lib.EntryChildren(targetID, orderID)
		loincAbbrs := make(map[string]abbrInfo)
		childrenOut := childToJSON(children, loincAbbrs)
		if childrenOut == nil { childrenOut = []childJSON{} }

		json.NewEncoder(w).Encode(struct {
			Children []childJSON       `json:"children"`
			Refs     map[string]refInfo `json:"refs"`
		}{Children: childrenOut, Refs: buildRefs(loincAbbrs)})
		return
	}

	// Mode 2: search
	q := strings.ToLower(strings.TrimSpace(r.URL.Query().Get("q")))
	if len(q) < 2 {
		w.Write([]byte(`{"orders":[],"refs":{}}`))
		return
	}

	// Build search index: term → []loinc
	var loincEntries []lib.LoincInfo
	lib.RefQuery("SELECT loinc_num, long_name, short_name, component, system, property FROM loinc_lab", nil, &loincEntries)
	searchIndex := make(map[string][]string)
	for _, l := range loincEntries {
		// Index by long_name words and component words
		for _, src := range []string{l.LongName, l.Component} {
			for _, word := range strings.Fields(strings.ToLower(src)) {
				word = strings.Trim(word, "()[].,/")
				if len(word) >= 3 && !contains(searchIndex[word], l.Code) {
					searchIndex[word] = append(searchIndex[word], l.Code)
				}
			}
		}
	}
	matchLoincs := make(map[string]bool)
	for term, loincs := range searchIndex {
		if strings.Contains(term, q) {
			for _, l := range loincs { matchLoincs[l] = true }
		}
	}

	type orderJSON struct {
		ID       string      `json:"id"`
		Name     string      `json:"name"`
		Date     string      `json:"date"`
		Time     string      `json:"time"`
		Count    int         `json:"count"`
		Children []childJSON `json:"children"`
	}

	orders, _ := lib.EntryQueryOld(targetID, lib.CategoryLab, "lab_order")
	var matchedOrders []orderJSON
	loincAbbrs := make(map[string]abbrInfo)

	for _, order := range orders {
		children, _ := lib.EntryChildren(targetID, order.EntryID)
		orderNameMatch := strings.Contains(strings.ToLower(order.Value), q)

		var matched []childJSON
		for _, c := range children {
			var data struct {
				Loinc string  `json:"loinc"`
				Abbr  string  `json:"abbreviation"`
				SIF   float64 `json:"si_factor"`
			}
			json.Unmarshal([]byte(c.Data), &data)

			textMatch := strings.Contains(strings.ToLower(c.Summary), q)
			loincMatch := data.Loinc != "" && matchLoincs[data.Loinc]
			if orderNameMatch || textMatch || loincMatch {
				matched = append(matched, childJSON{Label: c.Summary, Loinc: data.Loinc})
				if data.Loinc != "" && data.Abbr != "" {
					if _, exists := loincAbbrs[data.Loinc]; !exists {
						f := data.SIF
						if f == 0 { f = 1.0 }
						loincAbbrs[data.Loinc] = abbrInfo{abbr: data.Abbr, siFactor: f}
					}
				}
			}
		}
		if len(matched) == 0 { continue }

		oj := orderJSON{ID: order.EntryID, Name: order.Value, Count: len(matched), Children: matched}
		var odata struct{ LocalTime string `json:"local_time"` }
		if json.Unmarshal([]byte(order.Data), &odata) == nil && odata.LocalTime != "" {
			if t, err := time.Parse(time.RFC3339, odata.LocalTime); err == nil {
				oj.Date = t.Format("20060102")
				if t.Hour() != 0 || t.Minute() != 0 {
					_, offset := t.Zone()
					oj.Time = fmt.Sprintf("%02d:%02d %s", t.Hour(), t.Minute(), offsetToTZName(offset))
				}
			}
		}
		if oj.Date == "" && order.Timestamp > 0 {
			oj.Date = time.Unix(order.Timestamp, 0).UTC().Format("20060102")
		}
		matchedOrders = append(matchedOrders, oj)
	}

	// LOINC name map — use official long_name from loinc_lab
	loincNameMap := make(map[string]string)
	for _, l := range loincEntries {
		if matchLoincs[l.Code] {
			loincNameMap[l.Code] = l.LongName
		}
	}
	if matchedOrders == nil { matchedOrders = []orderJSON{} }

	json.NewEncoder(w).Encode(struct {
		Orders     []orderJSON        `json:"orders"`
		Refs       map[string]refInfo  `json:"refs"`
		LoincNames map[string]string   `json:"loincNames"`
	}{Orders: matchedOrders, Refs: buildRefs(loincAbbrs), LoincNames: loincNameMap})
}