<?php
session_start();

// MSIN-4379 — Traductions toujours au nom de compte.php (jamais ajax_bib_range.php).
define('MS1_BIB_AJAX', true);
$_SERVER['PHP_SELF'] = '/compte.php';
$_SERVER['SCRIPT_NAME'] = '/compte.php';

require_once('php/inc_fonctions.php');
require_once('php/inc_fx_promoteur.php');

$strLangue = $_SESSION['lang'] ?? 'fr';
$reqLang = $_REQUEST['lang'] ?? $_REQUEST['lng'] ?? '';
if (!empty($reqLang) && in_array($reqLang, ['fr', 'en'], true)) {
    $strLangue = $reqLang;
}
$vPage = 'compte.php';
$vtexte_page = obtenirTextepage($vPage, $strLangue, 2);

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

$action = $_REQUEST['action'] ?? '';

$arrBibAjaxActions = [
    'create',
    'delete',
    'save',
    'view',
    'batch_analysis',
    'refresh_ranges',
    'refresh_ranges_data',
    'batch_go',
    'batch_apply',
    'batch_apply_chunk',
    'reset_preview',
    'reset_apply',
    'save_team_mode',
    'toggle_lock',
    'save_auto_config',
    'anomalies',
    'batch_global_analysis',
    'batch_global_simulate',
    'global_batch_panel',
];

if ($action !== '' && in_array($action, $arrBibAjaxActions, true)) {
    fxBibRequireAjaxAccess();
}

// =====================
// CREATE
// =====================
if ($action == 'create') {

    $epr_id = intval($_REQUEST['epr_id'] ?? 0);

    if ($epr_id > 0) {

        // ⚠️ On ne crée PLUS en DB

        // On récupère les ranges existants AVEC stats
        $tabBibRanges = fxInfosBibRange($epr_id);

        // 👉 On ajoute UNE ligne vide (UI seulement)
        $tabBibRanges[] = [
            'epr_bib_id'      => 0,   // ID temporaire
            'epr_id'          => $epr_id,
            'epr_bib_start'   => '',
            'epr_bib_finish'  => '',
            'dernier_bib'     => '',
            'nb_utilises'     => '',
            'liste_trous'     => '',
            'liste_doublons'  => ''
        ];

        echo json_encode([
            'success' => true,
           'html'    => renderBibRanges($tabBibRanges, $epr_id),
            'error'   => ''
        ]);
        exit;
    }

    echo json_encode([
        'success' => false,
        'message' => fxBibMsg('bib_v4_ajax_epr_invalid')
    ]);
    exit;
}


// =====================
// DELETE
// =====================
if ($action == 'delete') {

    $id = intval($_REQUEST['id'] ?? 0);

    if ($id > 0) {

        $rowLock = $objDatabase->fxGetRow("
            SELECT epr_bib_locked
            FROM inscriptions_epreuves_bib
            WHERE epr_bib_id = $id
        ");

        if ($rowLock && (int)($rowLock['epr_bib_locked'] ?? 0) === 1) {
            echo json_encode([
                'success' => false,
                'message' => fxBibMsg('bib_v4_ajax_range_locked')
            ]);
            exit;
        }

        $range = fxInfosBibRange(0,$id);

        $epr_id = $range[1]["epr_id"];


        if (!$range) {
            echo json_encode([
                'success' => false,
                'message' => fxBibMsg('bib_v4_ajax_range_not_found')
            ]);
            exit;
        }

        if ((int)$range[1]['nb_utilises'] > 0) {
            echo json_encode([
                'success' => false,
                'message' => fxBibMsg('bib_v4_ajax_delete_used')
            ]);
            exit;
        }


        $sql = "
            DELETE FROM inscriptions_epreuves_bib
            WHERE epr_bib_id = $id
        ";

        $objDatabase->fxQuery($sql);

        $tabBibRanges = fxInfosBibRange($epr_id);

        echo json_encode([
            'success' => true,
            'html'    => renderBibRanges($tabBibRanges,$epr_id),
            'error'   => ''
        ]);
        exit;
    }

    echo json_encode([
        'success' => false,
        'message' => fxBibMsg('bib_v4_ajax_id_invalid')
    ]);
    exit;
}
// =====================
// SAVE
// =====================
if ($action == 'save') {

    $id     = intval($_REQUEST['id'] ?? 0);
    $epr_id = intval($_REQUEST['epr_id'] ?? 0);
    $start  = intval($_REQUEST['start'] ?? 0);
    $end    = intval($_REQUEST['end'] ?? 0);

    $is_new = ($id == 0);

    // =====================
    // VALIDATION 1 — epr_id
    // =====================
    if ($is_new && $epr_id <= 0) {
        echo json_encode(['success' => false, 'message' => fxBibMsg('bib_v4_ajax_epr_invalid')]);
        exit;
    }

    // =====================
    // recherche eve_id
    // =====================
    $sqlGet = "SELECT eve_id FROM inscriptions_epreuves WHERE epr_id = $epr_id";
    $eve_id = (int)$objDatabase->fxGetVar($sqlGet);

    // =====================
    // VALIDATION 2 — VALEURS NUMÉRIQUES
    // =====================
    if ($start <= 0 || $end <= 0) {
        echo json_encode(['success' => false, 'message' => fxBibMsg('bib_v4_ajax_values_invalid')]);
        exit;
    }

    // =====================
    // VALIDATION 3 — LOGIQUE INTERVALLE
    // =====================
    if ($start > $end) {
        echo json_encode(['success' => false, 'message' => fxBibMsg('bib_v4_ajax_start_gt_end')]);
        exit;
    }

    // =====================
    // RÉCUPÉRER epr_id + PROTÉGER LES DOSSARDS SI UPDATE
    // =====================
    if (!$is_new) {

        $sqlGet = "SELECT epr_id, epr_bib_locked FROM inscriptions_epreuves_bib WHERE epr_bib_id = $id";
        $rowRange = $objDatabase->fxGetRow($sqlGet);

        if (!$rowRange || (int)($rowRange['epr_id'] ?? 0) <= 0) {
            echo json_encode(['success' => false, 'message' => fxBibMsg('bib_v4_ajax_range_not_found')]);
            exit;
        }

        if ((int)($rowRange['epr_bib_locked'] ?? 0) === 1) {
            echo json_encode(['success' => false, 'message' => fxBibMsg('bib_v4_ajax_range_locked')]);
            exit;
        }

        $epr_id = (int)$rowRange['epr_id'];

        if ($epr_id <= 0) {
            echo json_encode(['success' => false, 'message' => fxBibMsg('bib_v4_ajax_range_not_found')]);
            exit;
        }

        $sqlBibNumRp = fxBibSqlNoBibUnsigned('rp.no_bib');
        $sqlCheckOrphans = "
            SELECT COUNT(*)
            FROM resultats_participants rp
            INNER JOIN inscriptions_epreuves_bib b
                ON b.epr_bib_id = $id
            WHERE rp.epr_id = b.epr_id
              AND $sqlBibNumRp BETWEEN b.epr_bib_start AND b.epr_bib_finish
              AND (
                    $sqlBibNumRp < $start
                 OR $sqlBibNumRp > $end
              )
        ";

        $nbOrphans = (int)$objDatabase->fxGetVar($sqlCheckOrphans);

        if ($nbOrphans > 0) {
            echo json_encode([
                'success' => false,
                'message' => fxBibMsg('bib_v4_ajax_orphans')
            ]);
            exit;
        }
    }

    // =====================
    // VALIDATION 4 — OVERLAP pas de double epreuves
    // =====================
    $tabOverlaps = fxBibGetOverlappingRanges($eve_id, $start, $end, $is_new ? 0 : $id);

    if (!empty($tabOverlaps)) {
        echo json_encode([
            'success' => false,
            'message' => fxBibFormatOverlapConflictMessage($tabOverlaps, $strLangue)
        ]);
        exit;
    }

    // =====================
    // INSERT OU UPDATE
    // =====================
    if ($is_new) {

        $sql = "
            INSERT INTO inscriptions_epreuves_bib
                (epr_id, epr_bib_start, epr_bib_finish, update_date, update_qui, eve_id)
            VALUES
                ($epr_id, $start, $end, NOW(), 'admin', $eve_id)
        ";

    } else {

        $sql = "
            UPDATE inscriptions_epreuves_bib
            SET epr_bib_start = $start,
                epr_bib_finish = $end,
                update_date = NOW(),
                eve_id = $eve_id
            WHERE epr_bib_id = $id
        ";
    }

    $objDatabase->fxQuery($sql);

    // =====================
    // RELOAD HTML
    // =====================
    $tabBibRanges = fxInfosBibRange($epr_id);

    echo json_encode([
        'success' => true,
        'html'    => renderBibRanges($tabBibRanges, $epr_id)
    ]);

    exit;
}
// =====================
// VIEW
// =====================
if ($action == 'view') {

    $epr_id   = intval($_REQUEST['epr_id'] ?? 0);
    $range_id = intval($_REQUEST['range_id'] ?? 0);

    if ($epr_id <= 0 || $range_id < 0) {
        echo json_encode([
            'success' => false,
            'message' => fxBibMsg('bib_v4_ajax_params_invalid')
        ]);
        exit;
    }

    // TEMPORAIRE : affichage simple pour test
    $html = renderBibView($epr_id, $range_id, $strLangue);

    echo json_encode([
        'success' => true,
        'html'    => $html
    ]);
    exit;


}
// =====================
// ANALYSE BATCH
// =====================
if ($action == 'batch_analysis') {

    $epr_id = intval($_POST['epr_id'] ?? 0);

    if ($epr_id <= 0) {
        echo json_encode([
            'success' => false,
            'message' => fxBibMsg('bib_v4_ajax_epr_invalid')
        ]);
        exit;
    }

    $infoBib = fxInfosBibEpreuve($epr_id);

    echo json_encode([
        'success' => true,
        'info' => $infoBib
    ]);
    exit;
}

// MSIN-4436 — Panneau assignation globale (chargement différé à l'ouverture).
if ($action == 'global_batch_panel') {

    $int_eve_id = (int)($_POST['eve_id'] ?? 0);

    if ($int_eve_id <= 0) {
        echo json_encode([
            'success' => false,
            'message' => fxBibMsg('bib_v4_ajax_epr_invalid'),
        ]);
        exit;
    }

    $tabEpreuves = $objDatabase->fxGetResults(
        "SELECT * FROM inscriptions_epreuves e WHERE e.eve_id = " . $int_eve_id . " AND epr_actif = 1 ORDER BY epr_id"
    );
    $tabBibAssignments = $objDatabase->fxGetResults(
        "SELECT * FROM bib_assignements WHERE ba_actif = 1 ORDER BY ba_tri"
    );

    $html = renderBibGlobalBatchPanel($int_eve_id, $tabEpreuves, $tabBibAssignments, $strLangue);

    if ($html === '') {
        echo json_encode([
            'success' => false,
            'message' => fxBibMsg('bib_v4_global_batch_need_two'),
        ]);
        exit;
    }

    echo json_encode([
        'success' => true,
        'html'    => $html,
    ]);
    exit;
}

// MSIN-4436 — Analyse batch global (épreuves solo, séquences par épreuve).
if ($action == 'batch_global_analysis') {

    $int_eve_id = (int)($_POST['eve_id'] ?? 0);
    $ba_id = (int)($_POST['ba_id'] ?? 0);
    $plans = json_decode($_POST['plans'] ?? '[]', true);
    $tabPlans = fxBibParseGlobalBatchPlans($plans, $int_eve_id);

    if ($int_eve_id <= 0 || $ba_id <= 0 || empty($tabPlans)) {
        echo json_encode([
            'success' => false,
            'message' => fxBibMsg('bib_v4_global_batch_plan_invalid'),
        ]);
        exit;
    }

    $intParticipants = 0;
    $intDispo = 0;
    $intAssignable = 0;
    $intManque = 0;

    foreach ($tabPlans as $plan) {
        $epr_id = (int)$plan['epr_id'];
        $ranges = $plan['ranges'];

        $participants = fxGetParticipantsForBatchAssign($epr_id, $ba_id);
        $tabRangesInfos = fxInfosBibRange($epr_id);
        $ids = array_map('intval', $ranges);
        $tabRangesInfos = array_filter($tabRangesInfos, function ($r) use ($ids) {
            return in_array((int)$r['epr_bib_id'], $ids, true);
        });

        $summary = fxBuildBatchSummaryFromRanges($tabRangesInfos, $participants, $epr_id);
        $intParticipants += (int)$summary['nb_participants'];
        $intDispo += (int)$summary['nb_dispo'];
        $intAssignable += (int)$summary['nb_assignable'];
        $intManque += (int)$summary['nb_manque'];
    }

    $info = fxBibMsg(
        'bib_v4_ajax_global_sim_summary',
        count($tabPlans),
        $intDispo,
        $intParticipants,
        $intAssignable,
        $intManque
    );

    echo json_encode([
        'success' => true,
        'info' => $info,
        'stats' => [
            'nb_epreuves'   => count($tabPlans),
            'nb_dispo'      => $intDispo,
            'nb_participants' => $intParticipants,
            'nb_assignable' => $intAssignable,
            'nb_manque'     => $intManque,
        ],
    ]);
    exit;
}

// MSIN-4436 — Simulation batch global.
if ($action == 'batch_global_simulate') {

    $int_eve_id = (int)($_POST['eve_id'] ?? 0);
    $ba_id = (int)($_POST['ba_id'] ?? 0);
    $plans = json_decode($_POST['plans'] ?? '[]', true);
    $tabPlans = fxBibParseGlobalBatchPlans($plans, $int_eve_id);

    if ($int_eve_id <= 0 || $ba_id <= 0 || empty($tabPlans)) {
        echo json_encode([
            'success' => false,
            'message' => fxBibMsg('bib_v4_global_batch_plan_invalid'),
        ]);
        exit;
    }

    $htmlParts = [];
    $intParticipants = 0;
    $intDispo = 0;
    $intAssignable = 0;
    $intManque = 0;

    foreach ($tabPlans as $plan) {
        $epr_id = (int)$plan['epr_id'];
        $ranges = $plan['ranges'];

        $participants = fxGetParticipantsForBatchAssign($epr_id, $ba_id);
        $tabRanges = fxGetRangesForBatchAssign($epr_id, $ranges);
        $simu = fxProcessBatchAssignments($epr_id, $participants, $tabRanges, 'simulation');

        $tabRangesInfos = fxInfosBibRange($epr_id);
        $ids = array_map('intval', $ranges);
        $tabRangesInfos = array_filter($tabRangesInfos, function ($r) use ($ids) {
            return in_array((int)$r['epr_bib_id'], $ids, true);
        });

        $summary = fxBuildBatchSummaryFromRanges($tabRangesInfos, $participants, $epr_id);
        $intParticipants += (int)$summary['nb_participants'];
        $intDispo += (int)$summary['nb_dispo'];
        $intAssignable += (int)$summary['nb_assignable'];
        $intManque += (int)$summary['nb_manque'];

        $tabEpreuve = fxGetEpreuve($epr_id);
        $strEprLabel = $tabEpreuve ? fxBibEpreuveDisplayName($tabEpreuve, $strLangue) : ('#' . $epr_id);

        $htmlParts[] = '<div class="bib-global-sim-section">'
            . '<h4 class="bib-global-sim-section__title">' . fxBibEsc($strEprLabel) . '</h4>'
            . renderBibView(
                $epr_id,
                0,
                $strLangue,
                'simulation',
                $simu,
                fxBibTexte('bib_v4_ajax_title_simulation'),
                fxBibMsg(
                    'bib_v4_ajax_sim_summary',
                    $summary['nb_dispo'],
                    $summary['nb_participants'],
                    $summary['nb_manque']
                )
            )
            . '</div>';
    }

    $info = fxBibMsg(
        'bib_v4_ajax_global_sim_summary',
        count($tabPlans),
        $intDispo,
        $intParticipants,
        $intAssignable,
        $intManque
    );

    $html = '<div class="epr-row-view bib-global-sim-view">'
        . '<div class="bib-global-sim-view__summary">' . fxBibEsc($info) . '</div>'
        . implode('', $htmlParts)
        . '</div>';

    echo json_encode([
        'success' => true,
        'html' => $html,
        'info' => $info,
    ]);
    exit;
}

if ($action == 'refresh_ranges') {

    $epr_id = intval($_POST['epr_id'] ?? $_GET['epr_id'] ?? 0);
    $mode = $_POST['mode'] ?? $_GET['mode'] ?? 'assign';
    if ($epr_id <= 0) {
        echo json_encode([
            'success' => false,
            'message' => fxBibMsg('bib_v4_ajax_epr_invalid')
        ]);
        exit;
    }

    $tabBibStats = fxInfosBibRange($epr_id);

    echo json_encode([
        'success' => true,
        'html' => renderBibRanges($tabBibStats, $epr_id, $mode)
    ]);
    exit;
}

if ($action == 'refresh_ranges_data') {

    $epr_id = intval($_POST['epr_id'] ?? 0);

    if ($epr_id <= 0) {
        echo json_encode(['success' => false]);
        exit;
    }

    $tab = fxInfosBibRange($epr_id);

    $out = [];

    foreach ($tab as $r) {
        $nb_total = $r['nb_total_range'] ?? 0;
        $nb_used  = (int)($r['nb_utilises'] ?? 0);

        $out[] = [
            'id'        => (int)$r['epr_bib_id'],
            'last'      => (int)$r['dernier_bib'],
            'used'      => $nb_used,
            'dispo'     => $nb_total - $nb_used,
            'trous'     => $r['liste_trous'] ?? '',
            'doublons'  => $r['liste_doublons'] ?? ''
        ];
    }

    echo json_encode([
        'success' => true,
        'ranges'  => $out
    ]);
    exit;
}

// =====================
// BATCH GO (DEBUG SEULEMENT)
// =====================
// Objectif :
// - recevoir les données du bouton GO
// - NE RIEN ÉCRIRE en DB
// - retourner les infos pour validation

if ($action == 'batch_go') {

    // ID de l’épreuve
    $epr_id = intval($_POST['epr_id'] ?? 0);

    // Liste des ranges sélectionnés (JSON → array PHP)
    $ranges = json_decode($_POST['ranges'] ?? '[]', true);

    $lockCheck = fxBibAssertRangesUnlocked($epr_id, is_array($ranges) ? $ranges : []);
    if (!$lockCheck['success']) {
        echo json_encode([
            'success' => false,
            'message' => $lockCheck['message'] ?? fxBibMsg('bib_v4_ajax_range_locked')
        ]);
        exit;
    }

    // Ordre choisi (table bib_assignements)
    $ba_id  = intval($_POST['ba_id'] ?? 0);

    // DEBUG : on retourne tout pour validation
    // =====================
// TEST fxGetParticipantsForBatchAssign
// =====================

    $participants = fxGetParticipantsForBatchAssign($epr_id, $ba_id);
// =====================
// UTILISER LA FONCTION PROPRE
// =====================
    $tabRanges = fxGetRangesForBatchAssign($epr_id, $ranges);
    $tabRangesInfos = fxInfosBibRange($epr_id);   // ← ICI
    $ids = array_map('intval', $ranges);
    $tabRangesInfos = array_filter($tabRangesInfos, function($r) use ($ids) {
        return in_array((int)$r['epr_bib_id'], $ids);
    });

    $nextBib = fxGetNextAvailableBib($epr_id, $tabRanges);
    $simu = fxProcessBatchAssignments($epr_id, $participants, $tabRanges, 'simulation');
    $summary = fxBuildBatchSummaryFromRanges($tabRangesInfos, $participants, $epr_id);

    $info = fxBibMsg(
        'bib_v4_ajax_sim_summary',
        $summary['nb_dispo'],
        $summary['nb_participants'],
        $summary['nb_manque']
    );
// =====================
// SIMULATION (temporaire simple)
// =====================


// =====================
// RENDER VIEW EN MODE SIMULATION
// =====================
    $html = renderBibView(
        $epr_id,
        0,
        $strLangue,
        'simulation',
        $simu,
        fxBibTexte('bib_v4_ajax_title_simulation'),
        $info
    );

    echo json_encode([
        'success' => true,
        'html' => $html
    ]);

    exit;


}

if ($action == 'batch_apply') {

    // =====================
    // GO BATCH (EXÉCUTION RÉELLE)
    // - Assigne les BIB en DB
    // - Utilise fxProcessBatchAssignments en mode 'execute'
    // - Affiche le résultat réel ($exec), pas de simulation
    // =====================

    $epr_id = intval($_POST['epr_id'] ?? 0);
    $ranges = json_decode($_POST['ranges'] ?? '[]', true);
    $ba_id  = intval($_POST['ba_id'] ?? 0);

    $lockCheck = fxBibAssertRangesUnlocked($epr_id, is_array($ranges) ? $ranges : []);
    if (!$lockCheck['success']) {
        echo json_encode([
            'success' => false,
            'message' => $lockCheck['message'] ?? fxBibMsg('bib_v4_ajax_range_locked')
        ]);
        exit;
    }

    $participants = fxGetParticipantsForBatchAssign($epr_id, $ba_id);
    $tabRanges    = fxGetRangesForBatchAssign($epr_id, $ranges);

    $exec = fxProcessBatchAssignments($epr_id, $participants, $tabRanges, 'execute');

    $html = fxBibBuildBatchApplyHtml($epr_id, $exec, count($participants), $strLangue);

    echo json_encode([
        'success' => true,
        'html' => $html
    ]);

    exit;
}

// MSIN-4433 — GO batch par paquets : progression réelle + relecture BD entre paquets.
if ($action == 'batch_apply_chunk') {

    $epr_id = intval($_POST['epr_id'] ?? 0);
    $ranges = json_decode($_POST['ranges'] ?? '[]', true);
    $ba_id  = intval($_POST['ba_id'] ?? 0);
    $intChunkSize = (int)($_POST['chunk_size'] ?? 50);
    $intTotalInitial = (int)($_POST['total_initial'] ?? 0);
    $blnBatchReset = ((int)($_POST['batch_reset'] ?? 0) === 1);

    if ($intChunkSize < 1) {
        $intChunkSize = 50;
    }
    if ($intChunkSize > 100) {
        $intChunkSize = 100;
    }

    $lockCheck = fxBibAssertRangesUnlocked($epr_id, is_array($ranges) ? $ranges : []);
    if (!$lockCheck['success']) {
        echo json_encode([
            'success' => false,
            'message' => $lockCheck['message'] ?? fxBibMsg('bib_v4_ajax_range_locked')
        ]);
        exit;
    }

    $strSessionKey = fxBibBatchExecSessionKey($epr_id);

    if ($blnBatchReset) {
        $_SESSION[$strSessionKey] = [];
    } elseif (!isset($_SESSION[$strSessionKey]) || !is_array($_SESSION[$strSessionKey])) {
        $_SESSION[$strSessionKey] = [];
    }

    $participants = fxGetParticipantsForBatchAssign($epr_id, $ba_id);

    if ($intTotalInitial <= 0) {
        $intTotalInitial = count($participants) + count($_SESSION[$strSessionKey]);
    }

    if (empty($participants)) {
        $execAll = $_SESSION[$strSessionKey];
        unset($_SESSION[$strSessionKey]);

        $html = fxBibBuildBatchApplyHtml($epr_id, $execAll, $intTotalInitial, $strLangue);

        echo json_encode([
            'success' => true,
            'complete' => true,
            'total_initial' => $intTotalInitial,
            'processed' => $intTotalInitial,
            'assigned_total' => count($execAll),
            'assigned_chunk' => 0,
            'html' => $html
        ]);
        exit;
    }

    $tabChunk = array_slice($participants, 0, $intChunkSize);
    $tabRanges = fxGetRangesForBatchAssign($epr_id, $ranges);
    $execChunk = fxProcessBatchAssignments($epr_id, $tabChunk, $tabRanges, 'execute');

    $_SESSION[$strSessionKey] = array_merge($_SESSION[$strSessionKey], $execChunk);

    $intRemaining = count(fxGetParticipantsForBatchAssign($epr_id, $ba_id));
    $intProcessed = max(0, $intTotalInitial - $intRemaining);
    $blnComplete = ($intRemaining === 0);

    // MSIN-4433 — Dossards épuisés : clôturer si aucune progression sur ce paquet.
    if (!$blnComplete && empty($execChunk)) {
        $blnComplete = true;
    }

    $arrResponse = [
        'success' => true,
        'complete' => $blnComplete,
        'total_initial' => $intTotalInitial,
        'processed' => $intProcessed,
        'assigned_total' => count($_SESSION[$strSessionKey]),
        'assigned_chunk' => count($execChunk),
    ];

    if ($blnComplete) {
        $execAll = $_SESSION[$strSessionKey];
        unset($_SESSION[$strSessionKey]);
        $arrResponse['html'] = fxBibBuildBatchApplyHtml($epr_id, $execAll, $intTotalInitial, $strLangue);
    }

    echo json_encode($arrResponse);
    exit;
}
// =====================
// RESET PREVIEW
// =====================
if ($action == 'reset_preview') {

    $epr_id = intval($_POST['epr_id'] ?? 0);

    $ranges = json_decode($_POST['ranges'] ?? '[]', true);

    $lockCheck = fxBibAssertRangesUnlocked($epr_id, is_array($ranges) ? $ranges : []);
    if (!$lockCheck['success']) {
        echo json_encode([
            'success' => false,
            'message' => $lockCheck['message'] ?? fxBibMsg('bib_v4_ajax_range_locked')
        ]);
        exit;
    }

    $participants = fxGetParticipantsForBatchReset($epr_id, $ranges);

    $html = renderBibView(
        $epr_id,
        0,
        $strLangue,
        'reset',
        $participants,
        fxBibTexte('bib_v4_ajax_title_reset_preview'),
        fxBibMsg('bib_v4_ajax_reset_preview_count', count($participants)),
        'warning'
    );

    echo json_encode([
        'success' => true,
        'html' => $html
    ]);

    exit;
}
// =====================
// RESET APPLY
// =====================
if ($action == 'reset_apply') {

    $epr_id = intval($_POST['epr_id'] ?? 0);

    $ranges = json_decode($_POST['ranges'] ?? '[]', true);

    $lockCheck = fxBibAssertRangesUnlocked($epr_id, is_array($ranges) ? $ranges : []);
    if (!$lockCheck['success']) {
        echo json_encode([
            'success' => false,
            'message' => $lockCheck['message'] ?? fxBibMsg('bib_v4_ajax_range_locked')
        ]);
        exit;
    }

    $participants = fxGetParticipantsForBatchReset($epr_id, $ranges);

    $count = 0;

    foreach ($participants as $p) {

        $par_id = intval($p['par_id']);

        if ($par_id <= 0) {
            continue;
        }

        $sql = "
            UPDATE resultats_participants
            SET no_bib = NULL
            WHERE par_id = $par_id
              AND is_cancelled = 0
        ";

        $objDatabase->fxQuery($sql);

        $count++;
    }

    $html = renderBibView(
        $epr_id,
        0,
        $strLangue,
        'reset',
        $participants,
        fxBibTexte('bib_v4_ajax_title_reset_done'),
        fxBibMsg('bib_v4_ajax_reset_done_count', $count),
        'success'
    );

    echo json_encode([
        'success' => true,
        'html' => $html
    ]);

    exit;
}
// =====================
// SAVE TEAM MODE
// =====================
if ($action == 'save_team_mode') {

    $epr_id = intval($_REQUEST['epr_id'] ?? 0);
    $team_mode = intval($_REQUEST['team_mode'] ?? 0);

    if ($epr_id <= 0 || !in_array($team_mode, [1, 2, 3])) {

        echo json_encode([
            'success' => false,
            'message' => fxBibMsg('bib_v4_ajax_params_invalid')
        ]);

        exit;
    }

    $sql = "
        UPDATE inscriptions_epreuves
        SET epr_bib_team_mode = $team_mode
        WHERE epr_id = $epr_id
        LIMIT 1
    ";

    $objDatabase->fxQuery($sql);

    echo json_encode([
        'success' => true
    ]);

    exit;
}

// MSIN-4379 — Verrouillage séquence (cadenas ouvert/fermé)
if ($action == 'toggle_lock') {

    $epr_bib_id = intval($_POST['epr_bib_id'] ?? 0);
    $epr_id     = intval($_POST['epr_id'] ?? 0);
    $locked     = intval($_POST['locked'] ?? 0) === 1;

    $result = fxBibSetRangeLocked($epr_bib_id, $locked, $epr_id);

    if (!$result['success']) {
        echo json_encode([
            'success' => false,
            'message' => $result['message'] ?? fxBibMsg('bib_v4_ajax_error')
        ]);
        exit;
    }

    $epr_id = (int)$result['epr_id'];
    $tabBibStats = fxInfosBibRange($epr_id);

    echo json_encode([
        'success' => true,
        'locked'  => !empty($result['locked']),
        'auto_active' => fxIsBibAutoActive($epr_id),
        'html'    => renderBibRanges($tabBibStats, $epr_id, 'assign')
    ]);
    exit;
}

// MSIN-4379 — Étape 2
// Endpoint AJAX : sauvegarde ou désactivation de la config auto (epr_bib_auto).
// Paramètres : epr_id, active (0|1), ranges (JSON des epr_bib_id), csrf_token.
// Prochain tour : étape 6–7 (assignation réelle à l'achat, sans passer par cet endpoint).
if ($action == 'save_auto_config') {

    $epr_id = intval($_POST['epr_id'] ?? 0);
    $active = intval($_POST['active'] ?? 1) === 1;
    $ranges = json_decode($_POST['ranges'] ?? '[]', true);

    if ($epr_id <= 0) {
        echo json_encode([
            'success' => false,
            'message' => fxBibMsg('bib_v4_ajax_epr_invalid')
        ]);
        exit;
    }

    $result = fxSaveBibAutoConfig($epr_id, is_array($ranges) ? $ranges : [], $active);

    if (!$result['success']) {
        echo json_encode([
            'success' => false,
            'message' => $result['message'] ?? fxBibMsg('bib_v4_ajax_error')
        ]);
        exit;
    }

    $tabBibStats = fxInfosBibRange($epr_id);

    echo json_encode([
        'success' => true,
        'auto_active' => !empty($result['auto_active']),
        'html' => renderBibRanges($tabBibStats, $epr_id, 'assign')
    ]);
    exit;
}

// MSIN-4379 — Dashboard anomalies (dossards en double, orphelins, etc.)
if ($action == 'anomalies') {

    $int_eve_id = (int)($_POST['eve_id'] ?? $_GET['eve_id'] ?? 0);

    if ($int_eve_id <= 0) {
        echo json_encode([
            'success' => false,
            'message' => fxBibMsg('bib_v4_ajax_epr_invalid')
        ]);
        exit;
    }

    $tabAnomalies = fxBibCollectAnomalies($int_eve_id, $strLangue);

    echo json_encode([
        'success' => true,
        'count'   => fxBibAnomalyTotalCount($tabAnomalies),
        'html'    => renderBibAnomaliesPanel($int_eve_id, $strLangue, $tabAnomalies),
    ]);
    exit;
}

// =====================
// ACTION INVALIDE
// =====================
echo json_encode([
    'success' => false,
    'message' => fxBibMsg('bib_v4_ajax_action_invalid')
]);
exit;