<?php
/**
 * Heli Audio-Timeline API
 *
 * Endpunkte:
 *   GET  /api/heli-timeline?mission=m1    → liefert Timeline, generiert Default falls keine Datei existiert
 *   POST /api/heli-timeline?mission=m1    → speichert Timeline-JSON (body) ins File-System, mit Backup
 *   GET  /api/heli-timeline?missions=1    → Liste aller Missionen + Status (default/edited/saved)
 *
 *   GET  /api/heli-timeline?durations=1   → liefert audio-durations.json
 *   POST /api/heli-timeline?durations=1   → speichert durations (body: {key: seconds})
 *
 *   GET  /api/heli-timeline?audios=1      → liste alle verfuegbaren Audio-IDs + Texte aus audio-texts.json
 *
 * Datenpfade:
 *   App/sims/heli/data/missions.json
 *   App/sims/heli/data/audio-timeline-<mid>.json
 *   App/sims/heli/data/audio-timeline-<mid>.json.bak-YYYYMMDD-HHMMSS
 *   App/sims/heli/data/audio-durations.json
 *   App/sims/heli/data/briefings.json
 *   App/sims/heli/data/heli-stations.json
 *   App/sims/heli/scripts/audio-texts.json
 *
 * Konzept: docs/konzept-audio-schnitt-tool.md
 */

require_once __DIR__ . '/../config/app.php';

header('Content-Type: application/json; charset=utf-8');

$dataDir    = __DIR__ . '/../../sims/heli/data';
$scriptsDir = __DIR__ . '/../../sims/heli/scripts';

function jsonReadOr($path, $fallback) {
    if (!file_exists($path)) return $fallback;
    $j = json_decode(file_get_contents($path), true);
    return is_array($j) ? $j : $fallback;
}
function jsonWrite($path, $data) {
    $json = json_encode($data, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT);
    return file_put_contents($path, $json) !== false;
}
function backupFile($path) {
    if (!file_exists($path)) return;
    $bak = $path . '.bak-' . date('Ymd-His');
    @copy($path, $bak);
}

$method = $_SERVER['REQUEST_METHOD'];

// === GET: Audios-Liste ===
if ($method === 'GET' && isset($_GET['audios'])) {
    $texts = jsonReadOr($scriptsDir . '/audio-texts.json', []);
    $durations = jsonReadOr($dataDir . '/audio-durations.json', ['durations' => []]);
    $durMap = $durations['durations'] ?? [];
    $out = [];
    foreach ($texts as $id => $text) {
        if (!is_string($text) || strpos($id, '_') === 0) continue;
        $out[] = [
            'id'   => $id,
            'text' => $text,
            'dur'  => $durMap[$id] ?? null,
        ];
    }
    echo json_encode(['audios' => $out], JSON_UNESCAPED_UNICODE);
    exit;
}

// === GET/POST: Audio-Dauern-Cache ===
if (isset($_GET['durations'])) {
    $path = $dataDir . '/audio-durations.json';
    if ($method === 'GET') {
        $existing = jsonReadOr($path, ['_doc' => 'Audio-Dauern in Sekunden (clientseitig gemessen)', 'durations' => []]);
        echo json_encode($existing, JSON_UNESCAPED_UNICODE);
        exit;
    }
    if ($method === 'POST') {
        $body = json_decode(file_get_contents('php://input'), true);
        if (!is_array($body)) { http_response_code(400); echo json_encode(['error' => 'invalid body']); exit; }
        $existing = jsonReadOr($path, ['durations' => []]);
        $existing['_doc'] = 'Audio-Dauern in Sekunden (clientseitig gemessen)';
        $existing['lastUpdated'] = date('c');
        $existing['durations'] = array_merge($existing['durations'] ?? [], $body['durations'] ?? []);
        jsonWrite($path, $existing);
        echo json_encode(['ok' => true, 'count' => count($existing['durations'])]);
        exit;
    }
}

// === GET: Missionen-Liste mit Status ===
if ($method === 'GET' && isset($_GET['missions'])) {
    $missions = jsonReadOr($dataDir . '/missions.json', ['missions' => []]);
    $out = [];
    foreach (($missions['missions'] ?? []) as $m) {
        $tlPath = $dataDir . '/audio-timeline-' . $m['id'] . '.json';
        $status = 'default';
        $lastSaved = null;
        if (file_exists($tlPath)) {
            $tl = jsonReadOr($tlPath, []);
            $status = !empty($tl['edited']) ? 'edited' : 'saved';
            $lastSaved = $tl['lastSaved'] ?? null;
        }
        $out[] = array_merge($m, ['status' => $status, 'lastSaved' => $lastSaved]);
    }
    echo json_encode(['missions' => $out], JSON_UNESCAPED_UNICODE);
    exit;
}

// === GET/POST: Timeline pro Mission ===
$missionId = $_GET['mission'] ?? '';
if (!preg_match('/^m[1-9][0-9]?$/', $missionId)) {
    http_response_code(400);
    echo json_encode(['error' => 'invalid mission id']);
    exit;
}

$tlPath = $dataDir . '/audio-timeline-' . $missionId . '.json';

if ($method === 'GET') {
    $forceDefault = !empty($_GET['forceDefault']);
    if (!$forceDefault && file_exists($tlPath)) {
        // existierende Timeline laden + zurueckgeben
        $tl = jsonReadOr($tlPath, null);
        if ($tl) { echo json_encode($tl, JSON_UNESCAPED_UNICODE); exit; }
    }
    // Default-Timeline generieren
    $tl = generateDefaultTimeline($missionId, $dataDir, $scriptsDir);
    echo json_encode($tl, JSON_UNESCAPED_UNICODE);
    exit;
}

if ($method === 'POST') {
    $body = json_decode(file_get_contents('php://input'), true);
    if (!is_array($body)) {
        http_response_code(400);
        echo json_encode(['error' => 'invalid body']);
        exit;
    }
    // Backup + Save
    backupFile($tlPath);
    $body['missionId']  = $missionId;
    $body['lastSaved']  = date('c');
    $body['edited']     = true;
    if (!isset($body['version'])) $body['version'] = 1;
    if (jsonWrite($tlPath, $body)) {
        echo json_encode(['ok' => true, 'lastSaved' => $body['lastSaved']]);
    } else {
        http_response_code(500);
        echo json_encode(['error' => 'write failed']);
    }
    exit;
}

http_response_code(405);
echo json_encode(['error' => 'method not allowed']);


// ===================================================================
//   Default-Timeline-Generator
//   Erzeugt eine vollstaendige Vorbefuellung pro Mission aus:
//   - missions.json (Mission-Daten)
//   - audio-texts.json (welche Audios existieren)
//   - audio-durations.json (echte Dauern, sonst Schaetzung)
//   - briefings.json (Wetter-Flag pro Mission)
//   - audio-drehbuch-regelwerk.md (Reihenfolge — hier in Code)
// ===================================================================
function generateDefaultTimeline($mid, $dataDir, $scriptsDir) {
    $missionsJ = jsonReadOr($dataDir . '/missions.json', ['missions' => []]);
    $mission = null;
    foreach ($missionsJ['missions'] as $m) {
        if ($m['id'] === $mid) { $mission = $m; break; }
    }
    if (!$mission) {
        return ['error' => 'mission not found', 'missionId' => $mid];
    }
    $texts = jsonReadOr($scriptsDir . '/audio-texts.json', []);
    $durJ  = jsonReadOr($dataDir . '/audio-durations.json', ['durations' => []]);
    $dur   = $durJ['durations'] ?? [];
    $brief = jsonReadOr($dataDir . '/briefings.json', ['missions' => []]);
    $hasWetter = !empty($brief['missions'][$mid]['wetter']);

    $gap = 0.5;

    // Hilfsfunktion: Audio-Slot anhaengen
    $addAudio = function(&$phase, $audioId, &$t, $note = '') use ($texts, $dur, $gap) {
        if (!isset($texts[$audioId])) return; // existiert nicht → ueberspringen
        $d = $dur[$audioId] ?? estimateDur($texts[$audioId]);
        $phase['audios'][] = [
            'id'      => 'a' . count($phase['audios']),
            'audioId' => $audioId,
            't'       => round($t, 2),
            'dur'     => round($d, 2),
            'note'    => $note,
        ];
        $t += $d + $gap;
    };

    // Hilfsfunktion: Event-Marker
    $addEvent = function(&$phase, $label, $t, $extra = []) {
        $phase['events'][] = array_merge([
            'id'    => 'ev' . count($phase['events']),
            't'     => round($t, 2),
            'label' => $label,
        ], $extra);
    };

    // === PLAN-PHASE ===
    $plan = ['id' => 'plan', 'label' => 'Routenplanung', 'color' => '#4a7c8a', 'audios' => [], 'events' => []];
    $t = 0;
    $addEvent($plan, 'Plan-Start', $t);
    $addAudio($plan, 'r_mission_intro_' . $mid, $t, 'Mission-Intro (Tower)');

    // Pro Wegpunkt ab Index 1 (Index 0 = Stuetzpunkt). V3-Konzept (2026-06-01):
    // r_nav_plan_correct ist KEIN Sprach-Audio mehr in der Pipe, sondern ein
    // UI-Klick-Sound (click-ok.mp3), den engine.notifyClick(wp, true) parallel
    // sofort beim User-Klick abspielt. Nur r_wp_geo_<wp> ist in der Sprach-Pipe.
    $wps = $mission['waypoints'];
    for ($i = 1; $i < count($wps); $i++) {
        $wpKey = $wps[$i];
        $isLast = $i === count($wps) - 1;
        // Event "sichtbar": Audio-START → Wegpunkt-Marker enthuellt sich
        $addEvent($plan, ($isLast ? 'Ziel' : 'Wegpunkt') . ' sichtbar: ' . $wpKey, $t, ['waypoint' => $wpKey]);
        // Audio: Geo-Info (Sprach-Pipe)
        $addAudio($plan, 'r_wp_geo_' . $wpKey, $t, ($isLast ? 'Ziel-Hinweis' : 'Wegpunkt-Hinweis'));
        // Event "erreicht": Audio-ENDE → Spieler wird zum Klicken erwartet
        $addEvent($plan, ($isLast ? 'Ziel' : 'Wegpunkt') . ' erreicht: ' . $wpKey, $t, ['waypoint' => $wpKey, 'click' => true]);
    }
    // Plan-Ende-Sprache (am Ende der Sprach-Pipe)
    $addAudio($plan, 'r_nav_plan_done', $t, 'Plan fertig');
    $addEvent($plan, 'Plan-Ende', $t);

    // === STARTFLUG-PHASE (start.html iframe) ===
    // Pilot-Hinweise sind szenario-spezifisch (start.html Builder waehlen pro scen
    // ein eigenes radio.messages Array). Wir spiegeln das hier.
    $hk = $mission['heliKey'];
    $scen = $mission['scen'] ?? 'berg-fels';
    $startflug = ['id' => 'startflug', 'label' => 'Startflug', 'color' => '#c97a3f', 'audios' => [], 'events' => []];
    $t = 0;
    $addEvent($startflug, 'Startflug-Beginn (Szenario: ' . $scen . ')', $t);
    $addAudio($startflug, 'r_tower_start_' . $hk, $t, 'Tower: Startplatz frei');
    $addAudio($startflug, 'r_mission_start_' . $mid, $t, 'Tower: Mission-Freigabe');

    // Pilot-Wetter-Kommentare (immer, Szenario-unabhaengig)
    $addEvent($startflug, 'Pool: Pilot-Wetter (immer)', $t);
    foreach (['r_pilot_calm1','r_pilot_calm2','r_pilot_calm3'] as $aid) $addAudio($startflug, $aid, $t, 'Wetter-OK');

    // Szenario-spezifische Pre-Warn (Hindernis-Hinweise)
    $startflugScenAudios = [
        'berg-schnee' => ['r_pilot_trees', 'r_pilot_flock', 'r_pilot_wind', 'r_pilot_narrow', 'r_pilot_fog1', 'r_pilot_fog2', 'r_pilot_fog3', 'r_warn_nebel'],
        'berg-fels'   => ['r_pilot_trees', 'r_pilot_flock', 'r_pilot_wind', 'r_pilot_narrow', 'r_pilot_fog1', 'r_pilot_fog2', 'r_warn_nebel'],
        'schlucht'    => ['r_pilot_narrow', 'r_pilot_gusts', 'r_pilot_wind', 'r_pilot_flock', 'r_pilot_trees'],
        'wasser'      => ['r_pilot_flock', 'r_pilot_gusts', 'r_pilot_wind', 'r_pilot_fog1', 'r_pilot_fog2', 'r_warn_nebel'],
        'autobahn'    => ['r_warn_kran', 'r_warn_antenne', 'r_warn_strom', 'r_warn_schornstein', 'r_warn_fabrik', 'r_pilot_gap', 'r_pilot_gusts', 'r_pilot_time'],
        'tal-dorf'    => ['r_warn_kran', 'r_warn_antenne', 'r_pilot_gap', 'r_pilot_trees', 'r_pilot_flock', 'r_pilot_wind', 'r_pilot_fog1'],
    ];
    $addEvent($startflug, 'Pool: Pilot-Strecken-Hinweise (szenario-spezifisch)', $t);
    foreach (($startflugScenAudios[$scen] ?? $startflugScenAudios['berg-fels']) as $aid) {
        $addAudio($startflug, $aid, $t, 'Strecke ' . $scen);
    }

    // Proximity-Warns (immer — Spieler-Fehler unabhaengig von Szenario)
    $addEvent($startflug, 'Pool: Proximity-Warns (immer)', $t);
    foreach (['r_pilot_bird_ahead','r_pilot_plane_ahead','r_pilot_sportplane_level','r_pilot_storm_detour','r_pilot_fog_thickens','r_pilot_wind_turn','r_warn_gewitter','r_warn_fuel'] as $aid) {
        $addAudio($startflug, $aid, $t, 'Proximity');
    }

    // Crash-Reaktionen — gefiltert nach Szenario (was kann ueberhaupt getroffen werden)
    $crashScenAudios = [
        'berg-schnee' => ['r_warn_vogel', 'r_warn_baum', 'r_warn_blitz', 'r_warn_flugzeug', 'r_warn_sport'],
        'berg-fels'   => ['r_warn_vogel', 'r_warn_baum', 'r_warn_blitz', 'r_warn_flugzeug', 'r_warn_sport'],
        'schlucht'    => ['r_warn_vogel', 'r_warn_baum', 'r_warn_blitz', 'r_warn_flugzeug'],
        'wasser'      => ['r_warn_vogel', 'r_warn_flugzeug', 'r_warn_sport', 'r_warn_blitz'],
        'autobahn'    => ['r_warn_haus', 'r_warn_klima', 'r_warn_vogel', 'r_warn_flugzeug', 'r_warn_blitz'],
        'tal-dorf'    => ['r_warn_haus', 'r_warn_baum', 'r_warn_vogel', 'r_warn_klima', 'r_warn_flugzeug'],
    ];
    $addEvent($startflug, 'Crash-Reaktionen (szenario-spezifisch)', $t);
    foreach (($crashScenAudios[$scen] ?? $crashScenAudios['berg-fels']) as $aid) {
        $addAudio($startflug, $aid, $t, 'Crash');
    }

    // Strikes (Pilot-Schreck + Tower-Reaktion — immer)
    $addEvent($startflug, 'Pool: Strikes (immer)', $t);
    foreach (['r_pilot_strike_1','r_pilot_strike_2','r_pilot_strike_3','r_pilot_strike_4','r_pilot_strike_5'] as $aid) $addAudio($startflug, $aid, $t, 'Pilot-Schreck');
    $addAudio($startflug, 'r_pilot_three_strikes', $t, '3 Strikes erreicht');
    $addAudio($startflug, 'r_tower_strike_' . $hk, $t, 'Tower nach Strike');
    $addAudio($startflug, 'r_tower_handover_' . $hk, $t, 'Tower: Chefpilotin uebernimmt');
    foreach (['r_pilot_too_high','r_pilot_time_up'] as $aid) $addAudio($startflug, $aid, $t, 'Fehler-Hinweis');

    // Tower-generic (selten, immer)
    $addEvent($startflug, 'Pool: Tower-generic', $t);
    foreach (['r_tower1','r_tower2','r_tower3','r_tower4'] as $aid) $addAudio($startflug, $aid, $t, 'generic Tower');

    $addAudio($startflug, 'r_start_erfolg', $t, 'Tower: Start erfolgreich');
    $addEvent($startflug, 'Startflug-Ende', $t);

    // === KARTENFLUG-PHASE (game.html flight-Phase) ===
    // r_mission_geo_<mid> bewusst NICHT mehr im Kartenflug (war Doppelung zu
    // r_tower_geo_<mid> in Bergung). Beide hatten denselben Geo-Lehrtext, nur
    // einmal als Briefing, einmal als Tower-Roger. Spart 1 Slot pro Mission.
    $flug = ['id' => 'flug', 'label' => 'Kartenflug', 'color' => '#5a8a5e', 'audios' => [], 'events' => []];
    $t = 0;
    $addEvent($flug, 'Flug-Start', $t);
    $addAudio($flug, 'r_nav_heli_intro_' . $hk, $t, 'Crew-Vorstellung');
    $addAudio($flug, 'r_nav_fuel_half', $t, 'Treibstoff-Halbzeit');
    if ($hasWetter) {
        $addAudio($flug, 'r_nav_weather_enter', $t, 'Wetter-Eintritt');
    }
    // r_nav_altitude_* ans ENDE verlegt (2026-06-02 nach Thomas): didaktisch beim
    // Zielanflug sinnvoller — Spieler kommt grad in die Berge / ans Tal.
    $isMountain = in_array($mission['scen'] ?? '', ['berg-schnee', 'berg-fels', 'schlucht']);
    $addAudio($flug, $isMountain ? 'r_nav_altitude_mountain' : 'r_nav_altitude_valley', $t, 'Hoehen-Info am Zielanflug');
    // r_im_zielgebiet bewusst NICHT mehr im Kartenflug (war zeitbasiert nach
    // Stack, kam bei langen Routen viel zu frueh — z.B. bei M4 ueber Oetz).
    // landing.html spielt es beim hover_drop wenn Heli physisch unter dem Patient steht.
    $addEvent($flug, 'Flug-Ende (Anflug)', $t);

    // === BERGUNG-PHASE (landing.html iframe) ===
    // Drei Bergungs-Modi:
    //  - HIGHWAY (hw):  Heli LANDET auf gesperrter Fahrbahn → KEIN Winch, Pilot steigt aus
    //  - WASSER (sea):  Heli schwebt, Rettungsschwimmer/Winch, Patient ueber Wasser
    //  - BERG (default): Heli schwebt, Flugretter abgeseilt, Winch
    $isHw  = $scen === 'autobahn';
    $isSea = $scen === 'wasser';
    $modeLabel = $isHw ? 'HIGHWAY-Landung' : ($isSea ? 'WASSER-Schwebeflug' : 'BERG-Winch');
    // r_caution_* Audios verwenden Underscore (berg_fels), missions.json hat Bindestrich (berg-fels)
    $scenU = str_replace('-', '_', $scen);

    $bergung = ['id' => 'bergung', 'label' => 'Bergungsflug', 'color' => '#a25cc8', 'audios' => [], 'events' => []];
    $t = 0;
    $addEvent($bergung, 'Bergung-Beginn (' . $modeLabel . ')', $t);
    $addAudio($bergung, 'r_pilot_call_' . $hk, $t, 'Pilot: Einsatzort erreicht');
    $addAudio($bergung, 'r_tower_geo_' . $mid, $t, 'Tower: Roger + Region-Info');

    if ($isHw) {
        // HIGHWAY: Heli landet, kein Winch
        $addEvent($bergung, 'Tower-Anflug (Highway)', $t);
        $addAudio($bergung, 'r_tower_hw_approach_' . $hk, $t, 'Tower-HW: Sperrzone erreicht');
        $addEvent($bergung, 'Landezone-Checks (Sequenz)', $t);
        $addAudio($bergung, 'r_pilot_hw_zone_check', $t, '1. Pilotin prueft Landezone');
        $addAudio($bergung, 'r_pilot_hw_zone_blocked', $t, '2a. Falls Zone blockiert');
        $addAudio($bergung, 'r_pilot_hw_zone_clear', $t, '2b. Falls Zone frei → absinken');
        $addAudio($bergung, 'r_land_approach', $t, '3. Anflug auf Fahrbahn');
        $addAudio($bergung, 'r_pilot_hw_ground_hold', $t, '4. Pilotin am Boden — wartet auf Patient');
        $addAudio($bergung, 'r_patient_aboard', $t, '5. Patient an Bord');
        $addEvent($bergung, 'Klinik-Freigabe + Wieder-Start', $t);
        $addAudio($bergung, 'r_tower_hw_extract_' . $hk, $t, '6. Tower-HW: Strecke frei');
        $addAudio($bergung, 'r_pilot_hw_clinic_lift', $t, '7. Pilotin: Klinik-Lift');
    } elseif ($isSea) {
        // WASSER: Schwebeflug, Rettungsschwimmer/Winch
        $addEvent($bergung, 'Tower-Anflug (Wasser)', $t);
        $addAudio($bergung, 'r_tower_sea_approach_' . $hk, $t, 'Tower-See: Wasserlage');
        $addAudio($bergung, 'r_caution_wasser', $t, 'Sicherheit: Wasser');
        $addEvent($bergung, 'Wasser-Bergung (Sequenz Schritt 1-6)', $t);
        $addAudio($bergung, 'r_land_approach', $t, '1. Anflug zum Patienten');
        $addAudio($bergung, 'r_land_winch_down', $t, '2. Winde fährt aus, Retter abgeseilt');
        $addAudio($bergung, 'r_land_rescuer_down', $t, '3. Retter ist im Wasser');
        $addAudio($bergung, 'r_warteschleife', $t, '4. Heli in Warteschleife/Zwischenland.');
        $addAudio($bergung, 'r_land_rescuer_ready', $t, '5. Retter signalisiert bereit');
        $addAudio($bergung, 'r_land_hook_connected', $t, '6. Haken eingeklinkt');
        $addAudio($bergung, 'r_land_lift_success', $t, '7. Patient gehoben');
        $addAudio($bergung, 'r_patient_aboard', $t, '8. Patient an Bord');
        $addEvent($bergung, 'Klinik-Freigabe', $t);
        $addAudio($bergung, 'r_tower_sea_extract_' . $hk, $t, '9. Tower-See: Klinik freigegeben');
    } else {
        // BERG (default): Schwebeflug + Winch + Flugretter abgeseilt
        $addEvent($bergung, 'Tower-Anflug (Berg)', $t);
        $addAudio($bergung, 'r_tower_approach_' . $hk, $t, 'Tower: Zielanflug freigegeben');
        $addAudio($bergung, 'r_caution_' . $scenU, $t, 'Sicherheit: ' . $scen);
        $addEvent($bergung, 'Berg-Winch-Bergung (Sequenz Schritt 1-8)', $t);
        $addAudio($bergung, 'r_land_approach', $t, '1. Schwebeflug zum Patienten');
        $addAudio($bergung, 'r_land_winch_down', $t, '2. Winde fährt aus, Retter abgeseilt');
        $addAudio($bergung, 'r_retter_intermediate', $t, '3. Retter unten, Versorgung lauft');
        $addAudio($bergung, 'r_warteschleife', $t, '4. Heli kreist / landet zwischen');
        $addAudio($bergung, 'r_land_rescuer_ready', $t, '5. Retter signalisiert bereit');
        $addAudio($bergung, 'r_land_hook_connected', $t, '6. Haken eingeklinkt');
        $addAudio($bergung, 'r_land_lift_success', $t, '7. Patient gehoben');
        $addAudio($bergung, 'r_patient_aboard', $t, '8. Patient an Bord');
        $addEvent($bergung, 'Klinik-Freigabe', $t);
        $addAudio($bergung, 'r_tower_extract_' . $hk, $t, '9. Tower: Direktfreigabe Klinik');
    }

    // Klinik-Anflug + Ende (alle Modi)
    $addEvent($bergung, 'Klinik-Anflug + Ende', $t);
    $addAudio($bergung, 'r_kurs_klinik', $t, 'Pilot: Kurs Klinik');
    $addAudio($bergung, 'r_land_clinic_ahead', $t, 'Land: Klinik voraus');
    $addAudio($bergung, 'r_land_disembark', $t, 'Land: Patient uebergeben');
    $addAudio($bergung, 'r_mission_success', $t, 'Mission erfolgreich');
    $addAudio($bergung, 'r_mission_abort', $t, 'Mission abgebrochen (Alternative)');
    $addEvent($bergung, 'Bergung-Ende', $t);

    return [
        '_doc'      => 'Default-Timeline (Atlas-generiert). 4 Phasen: plan/startflug/flug/bergung. Tool ueberschreibt beim ersten Save.',
        'missionId' => $mid,
        'version'   => 2,
        'gap'       => $gap,
        'edited'    => false,
        'lastSaved' => null,
        'phases'    => [$plan, $startflug, $flug, $bergung],
    ];
}

// TTS-Sprechdauer-Schaetzung aus Text (Fallback wenn keine echte Dauer da)
function estimateDur($text) {
    if (!$text) return 3;
    $sec = mb_strlen($text) / 12.0 + 1.5;
    return max(3, min(25, round($sec, 1)));
}