<?php

/**
 * Admin documentation (doc_mod / doc_page / doc_anchor) — super admin.
 * Lister, creer modules et pages ; edition via /php/doc_edition.php (Trumbowyg).
 * Creation reservee dev/preprod (le contenu est ensuite pousse par la base).
 */

function fxDocAdminEsc($str)
{
    return htmlspecialchars((string)$str, ENT_QUOTES, 'UTF-8');
}

function fxDocAdminIsDevPreprod()
{
    global $vblnEnvironementDev, $vblnEnvironementPreProd;

    return !empty($vblnEnvironementDev) || !empty($vblnEnvironementPreProd);
}

function fxDocAdminSchemaReady()
{
    global $objDatabase;

    static $blnReady = null;

    if ($blnReady !== null) {
        return $blnReady;
    }

    if (!isset($objDatabase)) {
        $blnReady = false;
        return $blnReady;
    }

    $qry = $objDatabase->fxQuery("SHOW TABLES LIKE 'doc_page'");
    $blnReady = ($qry && mysqli_num_rows($qry) > 0);

    return $blnReady;
}

function fxDocAdminEditUrl($modClef, $prg)
{
    global $vDomaine;

    $prg = ($prg !== '') ? $prg : 'compte.php';

    return $vDomaine . '/php/doc_edition.php?' . http_build_query(array(
        'mod' => $modClef,
        'anchor' => $modClef,
        'prg' => $prg,
        'bd' => 'client',
        'page' => 'compte.php',
    ));
}

function fxDocAdminListModules()
{
    global $objDatabase;

    if (!fxDocAdminSchemaReady()) {
        return array();
    }

    $sql = "SELECT m.pk_doc_mod, m.doc_mod_clef, m.doc_mod_prg, m.doc_mod_titre, m.doc_mod_actif,
                   (SELECT COUNT(DISTINCT p.doc_page_clef)
                      FROM doc_page p
                     WHERE p.doc_mod_clef = m.doc_mod_clef) AS nb_pages
            FROM doc_mod m
            ORDER BY m.doc_mod_tri, m.doc_mod_titre";

    $rows = $objDatabase->fxGetResults($sql);

    return is_array($rows) ? $rows : array();
}

function fxDocAdminGetModule($modClef)
{
    global $objDatabase;

    if (!fxDocAdminSchemaReady() || trim($modClef) === '') {
        return null;
    }

    return $objDatabase->fxGetRow(
        "SELECT * FROM doc_mod WHERE doc_mod_clef = '" . $objDatabase->fxEscape($modClef) . "' LIMIT 1"
    );
}

function fxDocAdminListPages($modClef)
{
    global $objDatabase;

    if (!fxDocAdminSchemaReady() || trim($modClef) === '') {
        return array();
    }

    $sql = "SELECT * FROM doc_page
            WHERE doc_mod_clef = '" . $objDatabase->fxEscape($modClef) . "'
            ORDER BY doc_tri, doc_page_clef, doc_langue DESC";

    $rows = $objDatabase->fxGetResults($sql);
    $grouped = array();

    if (is_array($rows)) {
        for ($i = 1; $i <= count($rows); $i++) {
            $r = $rows[$i];
            $clef = $r['doc_page_clef'] ?? '';
            if ($clef === '') {
                continue;
            }
            if (!isset($grouped[$clef])) {
                $grouped[$clef] = array(
                    'clef' => $clef,
                    'tri' => (int)($r['doc_tri'] ?? 0),
                    'prg' => $r['doc_prg'] ?? 'compte.php',
                    'fr' => null,
                    'en' => null,
                );
            }
            $lng = $r['doc_langue'] ?? 'fr';
            if ($lng === 'fr' || $lng === 'en') {
                $grouped[$clef][$lng] = $r;
            }
        }
    }

    return $grouped;
}

function fxDocAdminCreateModule($clef, $titre, $prg)
{
    global $objDatabase;

    $clef = trim($clef);
    $prg = (trim($prg) !== '') ? trim($prg) : 'compte.php';

    if ($clef === '') {
        return array('state' => 'error', 'message' => 'Clé du module requise.');
    }
    if (!preg_match('/^[a-z0-9_]+$/i', $clef)) {
        return array('state' => 'error', 'message' => 'Clé invalide (lettres, chiffres, underscore seulement).');
    }
    if (!fxDocAdminSchemaReady()) {
        return array('state' => 'error', 'message' => 'Tables de documentation absentes.');
    }

    $intExists = (int)$objDatabase->fxGetVar(
        "SELECT COUNT(*) FROM doc_mod
         WHERE doc_mod_clef = '" . $objDatabase->fxEscape($clef) . "'
           AND doc_mod_prg = '" . $objDatabase->fxEscape($prg) . "'"
    );
    if ($intExists > 0) {
        return array('state' => 'error', 'message' => 'Ce module existe déjà.');
    }

    $objDatabase->fxQuery(
        "INSERT INTO doc_mod (doc_mod_clef, doc_mod_prg, doc_mod_titre, doc_mod_actif, doc_mod_tri, doc_mod_creation)
         VALUES ('" . $objDatabase->fxEscape($clef) . "', '" . $objDatabase->fxEscape($prg) . "', '" . $objDatabase->fxEscape($titre) . "', 1, 0, NOW())"
    );

    $intAnchor = (int)$objDatabase->fxGetVar(
        "SELECT COUNT(*) FROM doc_anchor
         WHERE doc_anchor_clef = '" . $objDatabase->fxEscape($clef) . "'
           AND doc_prg = '" . $objDatabase->fxEscape($prg) . "'"
    );
    if ($intAnchor === 0) {
        $objDatabase->fxQuery(
            "INSERT INTO doc_anchor (doc_anchor_clef, doc_mod_clef, doc_prg, doc_actif, doc_creation)
             VALUES ('" . $objDatabase->fxEscape($clef) . "', '" . $objDatabase->fxEscape($clef) . "', '" . $objDatabase->fxEscape($prg) . "', 1, NOW())"
        );
    }

    return array('state' => 'ok', 'mod' => $clef, 'prg' => $prg);
}

function fxDocAdminCreatePage($modClef, $pageClef, $prg)
{
    global $objDatabase;

    $modClef = trim($modClef);
    $pageClef = trim($pageClef);
    $prg = (trim($prg) !== '') ? trim($prg) : 'compte.php';

    if ($modClef === '' || $pageClef === '') {
        return array('state' => 'error', 'message' => 'Clé du module et clé de page requises.');
    }
    if (!preg_match('/^[a-z0-9_]+$/i', $pageClef)) {
        return array('state' => 'error', 'message' => 'Clé de page invalide (lettres, chiffres, underscore seulement).');
    }
    if (!fxDocAdminSchemaReady()) {
        return array('state' => 'error', 'message' => 'Tables de documentation absentes.');
    }

    $intExists = (int)$objDatabase->fxGetVar(
        "SELECT COUNT(*) FROM doc_page
         WHERE doc_page_clef = '" . $objDatabase->fxEscape($pageClef) . "'
           AND doc_prg = '" . $objDatabase->fxEscape($prg) . "'"
    );
    if ($intExists > 0) {
        return array('state' => 'error', 'message' => 'Cette page existe déjà.');
    }

    $intTri = (int)$objDatabase->fxGetVar(
        "SELECT COALESCE(MAX(doc_tri), 0) + 10 FROM doc_page
         WHERE doc_mod_clef = '" . $objDatabase->fxEscape($modClef) . "'"
    );

    foreach (array('fr', 'en') as $lng) {
        $objDatabase->fxQuery(
            "INSERT INTO doc_page (doc_mod_clef, doc_page_clef, doc_langue, doc_titre, doc_sous_titre, doc_html, doc_prg, doc_tri, doc_actif, doc_creation)
             VALUES ('" . $objDatabase->fxEscape($modClef) . "', '" . $objDatabase->fxEscape($pageClef) . "', '" . $lng . "', '', '', '', '" . $objDatabase->fxEscape($prg) . "', " . $intTri . ", 1, NOW())"
        );
    }

    return array('state' => 'ok', 'mod' => $modClef, 'page' => $pageClef, 'prg' => $prg);
}

/** Liste des modules + formulaire de creation. */
function fxDocAdminRenderModulesList()
{
    global $vDomaine;

    $arrModules = fxDocAdminListModules();
    $blnDev = fxDocAdminIsDevPreprod();

    echo '<div class="d-flex align-items-center justify-content-between mb-3">';
    echo '<h1 class="h3 mb-0">Documentation &amp; Nouveautés</h1>';
    echo '</div>';
    echo '<p class="text-muted">Modules de documentation (pages HTML multipage). Le contenu n\'est pas lié au code : édition directe ici, puis poussé par la base.</p>';

    if ($blnDev) {
        echo '<div class="card mb-4">';
        echo '<div class="card-header"><i class="fa fa-plus mr-2" aria-hidden="true"></i>Créer un module</div>';
        echo '<div class="card-body">';
        echo '<form method="post" action="documentation.php" class="form-row align-items-end">';
        echo '<input type="hidden" name="action" value="addmodule">';
        echo '<div class="form-group col-md-3"><label>Clé du module</label><input type="text" name="doc_mod_clef" class="form-control" placeholder="ex. promoteur_hub_annonces" required></div>';
        echo '<div class="form-group col-md-4"><label>Titre</label><input type="text" name="doc_mod_titre" class="form-control" placeholder="ex. Nouveautés MS1"></div>';
        echo '<div class="form-group col-md-3"><label>Programme (doc_prg)</label><input type="text" name="doc_mod_prg" class="form-control" value="compte.php"></div>';
        echo '<div class="form-group col-md-2"><button type="submit" class="btn btn-primary btn-block">Créer</button></div>';
        echo '</form>';
        echo '</div></div>';
    } else {
        echo '<div class="alert alert-info">La création de modules/pages est réservée aux environnements dev/préprod.</div>';
    }

    if (empty($arrModules)) {
        echo '<div class="alert alert-warning">Aucun module de documentation.</div>';
        return;
    }

    echo '<table class="table table-striped table-hover">';
    echo '<thead><tr><th>Titre</th><th>Clé</th><th>Programme</th><th class="text-center">Pages</th><th class="text-right">Actions</th></tr></thead><tbody>';

    for ($i = 1; $i <= count($arrModules); $i++) {
        $m = $arrModules[$i];
        $strClef = $m['doc_mod_clef'] ?? '';
        $strPrg = $m['doc_mod_prg'] ?? 'compte.php';
        $intNb = (int)($m['nb_pages'] ?? 0);

        echo '<tr>';
        echo '<td>' . fxDocAdminEsc($m['doc_mod_titre'] ?? '') . '</td>';
        echo '<td><code>' . fxDocAdminEsc($strClef) . '</code></td>';
        echo '<td>' . fxDocAdminEsc($strPrg) . '</td>';
        echo '<td class="text-center">' . $intNb . '</td>';
        echo '<td class="text-right">';
        echo '<a class="btn btn-sm btn-outline-secondary mr-1" href="documentation.php?p=pages&mod=' . urlencode($strClef) . '"><i class="fa fa-list" aria-hidden="true"></i> Pages</a>';
        echo '<a class="btn btn-sm btn-primary" href="' . fxDocAdminEsc(fxDocAdminEditUrl($strClef, $strPrg)) . '" target="_blank"><i class="fa fa-pencil" aria-hidden="true"></i> Éditer</a>';
        echo '</td>';
        echo '</tr>';
    }

    echo '</tbody></table>';
}

/** Liste des pages d'un module + formulaire d'ajout de page. */
function fxDocAdminRenderPages($modClef)
{
    $modClef = trim($modClef);
    $arrMod = fxDocAdminGetModule($modClef);

    if ($arrMod === null) {
        echo '<div class="alert alert-danger">Module introuvable.</div>';
        echo '<a class="btn btn-outline-secondary" href="documentation.php"><i class="fa fa-chevron-left" aria-hidden="true"></i> Retour</a>';
        return;
    }

    $strPrg = $arrMod['doc_mod_prg'] ?? 'compte.php';
    $arrPages = fxDocAdminListPages($modClef);
    $blnDev = fxDocAdminIsDevPreprod();

    echo '<div class="d-flex align-items-center justify-content-between mb-3">';
    echo '<div><a class="btn btn-sm btn-outline-secondary mb-2" href="documentation.php"><i class="fa fa-chevron-left" aria-hidden="true"></i> Tous les modules</a>';
    echo '<h1 class="h3 mb-0">' . fxDocAdminEsc($arrMod['doc_mod_titre'] ?? $modClef) . '</h1>';
    echo '<div class="text-muted"><code>' . fxDocAdminEsc($modClef) . '</code> · ' . fxDocAdminEsc($strPrg) . '</div></div>';
    echo '<a class="btn btn-primary" href="' . fxDocAdminEsc(fxDocAdminEditUrl($modClef, $strPrg)) . '" target="_blank"><i class="fa fa-pencil" aria-hidden="true"></i> Éditer le module</a>';
    echo '</div>';

    if ($blnDev) {
        echo '<div class="card mb-4">';
        echo '<div class="card-header"><i class="fa fa-plus mr-2" aria-hidden="true"></i>Ajouter une page</div>';
        echo '<div class="card-body">';
        echo '<form method="post" action="documentation.php" class="form-row align-items-end">';
        echo '<input type="hidden" name="action" value="addpage">';
        echo '<input type="hidden" name="mod" value="' . fxDocAdminEsc($modClef) . '">';
        echo '<input type="hidden" name="doc_prg" value="' . fxDocAdminEsc($strPrg) . '">';
        echo '<div class="form-group col-md-6"><label>Clé de la nouvelle page</label><input type="text" name="doc_page_clef" class="form-control" placeholder="ex. annonce_v4_73" required></div>';
        echo '<div class="form-group col-md-3"><button type="submit" class="btn btn-primary btn-block">Créer et éditer</button></div>';
        echo '</form>';
        echo '<small class="text-muted">La page (FR + EN) est créée vide, puis l\'éditeur s\'ouvre.</small>';
        echo '</div></div>';
    }

    if (empty($arrPages)) {
        echo '<div class="alert alert-warning">Aucune page dans ce module.</div>';
        return;
    }

    echo '<table class="table table-striped">';
    echo '<thead><tr><th class="text-center">Tri</th><th>Clé</th><th>Titre FR</th><th>Titre EN</th></tr></thead><tbody>';

    foreach ($arrPages as $page) {
        $strTitreFr = isset($page['fr']['doc_titre']) ? $page['fr']['doc_titre'] : '';
        $strTitreEn = isset($page['en']['doc_titre']) ? $page['en']['doc_titre'] : '';

        echo '<tr>';
        echo '<td class="text-center">' . (int)$page['tri'] . '</td>';
        echo '<td><code>' . fxDocAdminEsc($page['clef']) . '</code></td>';
        echo '<td>' . fxDocAdminEsc($strTitreFr) . '</td>';
        echo '<td>' . fxDocAdminEsc($strTitreEn) . '</td>';
        echo '</tr>';
    }

    echo '</tbody></table>';
    echo '<p class="text-muted"><i class="fa fa-info-circle" aria-hidden="true"></i> Le bouton « Éditer le module » ouvre toutes les pages dans l\'éditeur visuel.</p>';
}