<?php
// --- CSV Export Handler: Muss GANZ AN DEN ANFANG! ---
if (isset($_GET['export_csv']) && current_user_can('manage_options')) {
    $wahl_id = intval($_GET['export_csv']);
    global $wpdb;
    $prefix = $wpdb->prefix;
    $wahl = $wpdb->get_row("SELECT * FROM {$prefix}kc_wahlen WHERE id={$wahl_id}");
    if (!$wahl) exit('Wahl nicht gefunden');

    // Workshops für diese Wahl holen
    $workshops = $wpdb->get_results(
        "SELECT ws.id, ws.name FROM {$prefix}kc_workshops ws JOIN {$prefix}kc_wahl_workshops ww ON ws.id = ww.workshop_id WHERE ww.wahl_id = ".intval($wahl_id)
    );
    $ws_names = [];
    foreach($workshops as $ws) $ws_names[$ws->id] = $ws->name;

    // Zuteilungen holen
    $rows = $wpdb->get_results("SELECT * FROM {$prefix}kc_zuteilung WHERE wahl_id=".intval($wahl_id));

    // Phasen bestimmen
    $phases = [];
    foreach($rows as $row) {
        if ($row->phase === null || $row->phase === '') continue;
        $phases[intval($row->phase)] = true;
    }
    $phases = array_keys($phases);
    sort($phases, SORT_NUMERIC);

    // Teamer pro Workshop/Phase (wie frontend-ergebnis)
    $ws_teamers = [];
    $ws_ids = array_keys($ws_names);
    if (!empty($ws_ids)) {
        foreach($ws_ids as $ws_id) {
            foreach($phases as $phase) {
                $trows = $wpdb->get_results($wpdb->prepare(
                    "SELECT t.vorname, t.nachname FROM {$prefix}kc_workshop_teamer wt ".
                    "JOIN {$prefix}kc_teamer t ON wt.teamer_id = t.id ".
                    "WHERE wt.workshop_id = %d AND wt.wahl_id = %d AND wt.phase = %d",
                    $ws_id, $wahl_id, $phase
                ));
                if (empty($trows)) {
                    $trows = $wpdb->get_results($wpdb->prepare(
                        "SELECT t.vorname, t.nachname FROM {$prefix}kc_workshop_teamer wt ".
                        "JOIN {$prefix}kc_teamer t ON wt.teamer_id = t.id ".
                        "WHERE wt.workshop_id = %d AND wt.wahl_id = %d AND wt.phase IS NULL",
                        $ws_id, $wahl_id
                    ));
                }
                if (empty($trows)) {
                    $trows = $wpdb->get_results($wpdb->prepare(
                        "SELECT t.vorname, t.nachname FROM {$prefix}kc_workshop_teamer wt ".
                        "JOIN {$prefix}kc_teamer t ON wt.teamer_id = t.id ".
                        "WHERE wt.workshop_id = %d AND wt.wahl_id IS NULL AND wt.phase IS NULL",
                        $ws_id
                    ));
                }
                if (!empty($trows)) {
                    $key = intval($ws_id) . '_' . intval($phase);
                    $ws_teamers[$key] = [];
                    foreach ($trows as $tr) {
                        $ws_teamers[$key][] = trim($tr->vorname.' '.$tr->nachname);
                    }
                }
            }
        }
    }

    // Gruppieren und sortieren wie im Frontend: erst nach Phase, dann Workshop, dann Teilnehmer
    $workshop_groups = [];
    $phases = [];
    foreach($rows as $row) {
        if ($row->phase === null || $row->phase === '') continue;
        $phaseNum = intval($row->phase);
        $phases[$phaseNum] = true;
        if ($row->workshop_id && isset($ws_names[$row->workshop_id])) {
            $workshop_groups[$phaseNum][$row->workshop_id][] = $row;
        }
    }
    $phases = array_keys($phases);
    sort($phases, SORT_NUMERIC);

    header('Content-Type: text/csv; charset=utf-8');
    header('Content-Disposition: attachment; filename="kc_zuteilung_wahl_'.$wahl_id.'.csv"');
    // Schreibe UTF-8 BOM, damit Excel Umlaute korrekt erkennt
    echo "\xEF\xBB\xBF";
    $output = fopen('php://output', 'w');
    // Excel erwartet in DE meist ; als Trennzeichen
    $delimiter = ';';
    // Kopfzeile mit separaten Namensspalten und Wunsch
    fputcsv($output, ['Phase','Workshop','Teamer','Nachname','Vorname','Wunsch'], $delimiter);
    foreach($phases as $phase) {
        if (empty($workshop_groups[$phase])) continue;
        $display = [];
        foreach($ws_names as $ws_id => $ws_name) {
            $teilnehmer = isset($workshop_groups[$phase][$ws_id]) ? $workshop_groups[$phase][$ws_id] : [];
            $count = count($teilnehmer);
            if ($count === 0) continue;
            $display[] = [
                'id' => $ws_id,
                'name' => $ws_name,
                'teilnehmer' => $teilnehmer,
                'count' => $count
            ];
        }
        usort($display, function($a, $b) { return $a['count'] - $b['count']; });
        foreach($display as $d) {
            $ws_id = $d['id'];
            $ws_name = $d['name'];
            $teilnehmer = $d['teilnehmer'];
            $teamer_key = intval($ws_id) . '_' . intval($phase);
            $teamer_str = !empty($ws_teamers[$teamer_key]) ? implode(', ', $ws_teamers[$teamer_key]) : '';
            usort($teilnehmer, function($a, $b) {
                return strcmp($a->nachname . $a->vorname, $b->nachname . $b->vorname);
            });
            foreach($teilnehmer as $t) {
                $vorname = preg_replace('/<[^>]*>/', '', $t->vorname);
                $nachname = preg_replace('/<[^>]*>/', '', $t->nachname);
                $ws_name_clean = preg_replace('/<[^>]*>/', '', $ws_name);
                $teamer_str_clean = preg_replace('/<[^>]*>/', '', $teamer_str);
                // Wunsch-Text ermitteln
                if ($t->wunsch_rang == 0) {
                    $wunsch = 'Vorzuteilung';
                } elseif ($t->wunsch_rang == -1) {
                    $wunsch = 'zugelost';
                } elseif ($t->wunsch_rang == 99) {
                    $wunsch = 'Zulosung';
                } elseif ($t->wunsch_rang > 0) {
                    $wunsch = intval($t->wunsch_rang) . '.';
                } else {
                    $wunsch = '';
                }

                fputcsv($output, [
                    $phase,
                    $ws_name_clean,
                    $teamer_str_clean,
                    $nachname,
                    $vorname,
                    $wunsch
                ], $delimiter);
            }
        }
    }
    fclose($output);
    exit;
}
function kc_zeige_zuteilung($wahl_id) {
    global $wpdb;
    $prefix = $wpdb->prefix;
    $wahl_id = intval($wahl_id);
    $wahl = $wpdb->get_row("SELECT * FROM {$prefix}kc_wahlen WHERE id={$wahl_id}");
    if (!$wahl) return;

    // Workshops dieser Wahl holen
    $workshops = $wpdb->get_results(
        "SELECT ws.id, ws.name
         FROM {$prefix}kc_workshops ws
         JOIN {$prefix}kc_wahl_workshops ww ON ws.id = ww.workshop_id
         WHERE ww.wahl_id = " . $wahl_id
    );
    $ws_names = [];
    foreach($workshops as $ws) $ws_names[$ws->id] = $ws->name;

    // Zuteilungen holen
    $rows = $wpdb->get_results(
        "SELECT * FROM {$prefix}kc_zuteilung WHERE wahl_id=" . $wahl_id
    );

    $workshop_groups = [];
    $nicht_zugeteilt = [];
    foreach($rows as $row) {
        if ($row->workshop_id && isset($ws_names[$row->workshop_id])) {
            $workshop_groups[$row->workshop_id][] = $row;
        } else {
            $nicht_zugeteilt[] = $row;
        }
    }
    uasort($workshop_groups, function($a, $b) {
        return count($a) - count($b);
    });

    echo '<div class="kc-admin-table-wrap">';
    echo '<h2 style="margin-top:0;">Zuteilung: '.esc_html($wahl->name).'</h2>';

    // Anzahl Phasen der Wahl
    $phasen = intval($wahl->anzahl_einheiten);
    if ($phasen < 1) $phasen = 1;

    // Für jede Phase eine einklappbare Sektion
    for ($phase = 1; $phase <= $phasen; $phase++) {
        echo '<details class="kc-phase-details" open>';
        echo '<summary>Phase '.intval($phase).' &nbsp; <span class="kc-count">(' . intval(count(array_filter($rows, function($r) use ($phase){ return intval($r->phase) === $phase; }))) . ' TN)</span></summary>';

        // Innerhalb der Phase: zeige pro Workshop die Teilnehmer (falls vorhanden)
        foreach ($ws_names as $ws_id => $ws_name) {
            // Filtere Teilnehmer dieser Phase & dieses Workshops
            $filtered = array_filter($rows, function($r) use ($phase, $ws_id) {
                return intval($r->phase) === $phase && intval($r->workshop_id) === intval($ws_id);
            });
            if (empty($filtered)) continue;

            echo '<div class="kc-workshop-card">';
            echo '<b>'.esc_html($ws_name).'</b> <span class="kc-count">(' . count($filtered) . ' TN)</span><br>';
            echo '<table style="width:100%;margin:8px 0">';
            echo '<tr><th>Name</th><th>Wunsch</th><th>Workshop</th></tr>';
            foreach ($filtered as $t) {
                if ($t->wunsch_rang == 0) {
                    $wunsch = "Vorzuteilung";
                } elseif ($t->wunsch_rang == -1) {
                    $wunsch = "zugelost";
                } elseif ($t->wunsch_rang == 99) {
                    $wunsch = "Zulosung";
                } elseif ($t->wunsch_rang > 0) {
                    $wunsch = intval($t->wunsch_rang) . '.';
                } else {
                    $wunsch = '';
                }
                echo '<tr>';
                echo '<td>'.esc_html($t->vorname.' '.$t->nachname).'</td>';
                echo '<td>'.$wunsch.'</td>';
                echo '<td>'.esc_html($ws_name).'</td>';
                echo '</tr>';
            }
            echo '</table></div>';
        }

        // Teilnehmer dieser Phase, die keinem Workshop zugeordnet sind
        $unassigned_phase = array_filter($rows, function($r) use ($phase) { return intval($r->phase) === $phase && (empty($r->workshop_id) || !intval($r->workshop_id)); });
        if (!empty($unassigned_phase)) {
            echo '<div class="kc-unassigned">';
            echo '<b>Nicht zugeteilt (Phase '.intval($phase).'):</b><br><ul style="margin:6px 0 0 16px;">';
            foreach($unassigned_phase as $t) {
                echo '<li>'.esc_html($t->vorname.' '.$t->nachname).'</li>';
            }
            echo '</ul></div>';
        }

        echo '</details>';
    }

    if (!empty($nicht_zugeteilt)) {
        echo '<div style="background:#fee;padding:14px;margin:14px 0;border-radius:10px;box-shadow:0 1px 5px #b6d33321;">';
        echo '<b>Nicht zugeteilt:</b><br><ul style="margin:0 0 0 15px;">';
        foreach($nicht_zugeteilt as $t) {
            echo '<li>'.esc_html($t->vorname.' '.$t->nachname).' (Phase '.intval($t->phase).')</li>';
        }
        echo '</ul></div>';
    }
    echo '</div>';
}

function kc_zuteilungen_page() {
    global $wpdb;
    $prefix = $wpdb->prefix;
    kc_admin_tabs('kc_zuteilungen');

    // Aktionen: Zuteilung ausführen oder löschen (per Wahl)
    if (isset($_GET['run_zuteilung'])) {
        $run_id = intval($_GET['run_zuteilung']);
        if ($run_id) {
            // Delegiere an die Zuteilungslogik
            if (function_exists('kc_run_zuteilung')) {
                kc_run_zuteilung($run_id);
                echo '<div class="notice notice-success">Zuteilung für Wahl ID '.intval($run_id).' ausgeführt.</div>';
                echo "<meta http-equiv='refresh' content='1;url=".esc_url(admin_url('admin.php?page=kc_zuteilungen'))."'>";
                return;
            } else {
                echo '<div class="notice notice-error">Die Zuteilungsfunktion ist nicht verfügbar.</div>';
            }
        }
    }

    if (isset($_GET['delete_zuteilung'])) {
        if ($del_id) {
            $wpdb->delete("{$prefix}kc_zuteilung", ['wahl_id' => $del_id]);
            echo '<div class="notice notice-success">Zuteilungen für Wahl ID '.intval($del_id).' wurden gelöscht.</div>';
            echo "<meta http-equiv='refresh' content='1;url=".esc_url(admin_url('admin.php?page=kc_zuteilungen'))."'>";
            return;
        }
    }

    // Ãœbersicht: Zeige Zuteilungen fÃ¼r ALLE Wahlen
    echo '<div class="kc-admin-table-wrap">';
    echo '<h2 style="margin-top:0;">Alle Zuteilungen</h2>';
    $wahlen = $wpdb->get_results("SELECT * FROM {$prefix}kc_wahlen WHERE deleted=0 ORDER BY id DESC");
    foreach($wahlen as $wahl) {
        $run_url = add_query_arg('run_zuteilung', $wahl->id, admin_url('admin.php?page=kc_zuteilungen'));
        $del_url = add_query_arg('delete_zuteilung', $wahl->id, admin_url('admin.php?page=kc_zuteilungen'));
        $details_url = add_query_arg('show_zuteilung', $wahl->id, admin_url('admin.php?page=kc_wahlen'));
        $csv_url = add_query_arg(['export_csv' => $wahl->id], admin_url('admin.php?page=kc_zuteilungen'));
        // Workshops & Zuteilungen für diese Wahl vorbereiten
        $workshops = $wpdb->get_results(
            "SELECT ws.id, ws.name
             FROM {$prefix}kc_workshops ws
             JOIN {$prefix}kc_wahl_workshops ww ON ws.id = ww.workshop_id
             WHERE ww.wahl_id = ".intval($wahl->id)
        );
        $ws_names = [];
        foreach($workshops as $ws) $ws_names[$ws->id] = $ws->name;

        // Zuteilungen holen
        $rows = $wpdb->get_results(
            "SELECT * FROM {$prefix}kc_zuteilung WHERE wahl_id=".intval($wahl->id)
        );

        // Gesamt-Details pro Wahl: einklappbar
        echo '<details style="margin-top:18px;border:1px solid #eaeaea;border-radius:6px;padding:8px;">';
        echo '<summary style="font-weight:700;cursor:pointer;">'.esc_html($wahl->name).' <span style="color:#555;font-weight:600;">('.count($rows).' TN)</span>';
        echo ' <span style="float:right">';
        echo '<a class="kc-btn" href="'.esc_url($details_url).'">Details</a> ';
        echo '<a class="kc-btn" href="'.esc_url($run_url).'">Zuteilung ausf&uuml;hren</a> ';
        echo '<a class="kc-btn del" href="'.esc_url($del_url).'" onclick="return confirm(\'Alle Zuteilungen f&uuml;r diese Wahl l&ouml;schen?\');">Zuteilungen l&ouml;schen</a> ';
        echo '<a class="kc-btn" style="background:#2da66a;color:#fff;" href="'.esc_url($csv_url).'">CSV Export</a>';
        echo '</span>';
        echo '</summary>';
// --- CSV Export Handler ---
if (isset($_GET['export_csv']) && current_user_can('manage_options')) {
    $wahl_id = intval($_GET['export_csv']);
    global $wpdb;
    $prefix = $wpdb->prefix;
    $wahl = $wpdb->get_row("SELECT * FROM {$prefix}kc_wahlen WHERE id={$wahl_id}");
    if (!$wahl) exit('Wahl nicht gefunden');

    // Workshops für diese Wahl holen
    $workshops = $wpdb->get_results(
        "SELECT ws.id, ws.name FROM {$prefix}kc_workshops ws JOIN {$prefix}kc_wahl_workshops ww ON ws.id = ww.workshop_id WHERE ww.wahl_id = ".intval($wahl_id)
    );
    $ws_names = [];
    foreach($workshops as $ws) $ws_names[$ws->id] = $ws->name;

    // Zuteilungen holen
    $rows = $wpdb->get_results("SELECT * FROM {$prefix}kc_zuteilung WHERE wahl_id=".intval($wahl_id));

    // Phasen bestimmen
    $phases = [];
    foreach($rows as $row) {
        if ($row->phase === null || $row->phase === '') continue;
        $phases[intval($row->phase)] = true;
    }
    $phases = array_keys($phases);
    sort($phases, SORT_NUMERIC);

    // CSV Header
    header('Content-Type: text/csv; charset=utf-8');
    header('Content-Disposition: attachment; filename="kc_zuteilung_wahl_'.$wahl_id.'.csv"');
    $output = fopen('php://output', 'w');
    // Kopfzeile
    fputcsv($output, ['Phase','Workshop','Teamer','Teilnehmer Vorname','Teilnehmer Nachname']);

    // Teamer pro Workshop/Phase (wie frontend-ergebnis)
    $ws_teamers = [];
    $ws_ids = array_keys($ws_names);
    if (!empty($ws_ids)) {
        foreach($ws_ids as $ws_id) {
            foreach($phases as $phase) {
                $trows = $wpdb->get_results($wpdb->prepare(
                    "SELECT t.vorname, t.nachname FROM {$prefix}kc_workshop_teamer wt ".
                    "JOIN {$prefix}kc_teamer t ON wt.teamer_id = t.id ".
                    "WHERE wt.workshop_id = %d AND wt.wahl_id = %d AND wt.phase = %d",
                    $ws_id, $wahl_id, $phase
                ));
                if (empty($trows)) {
                    $trows = $wpdb->get_results($wpdb->prepare(
                        "SELECT t.vorname, t.nachname FROM {$prefix}kc_workshop_teamer wt ".
                        "JOIN {$prefix}kc_teamer t ON wt.teamer_id = t.id ".
                        "WHERE wt.workshop_id = %d AND wt.wahl_id = %d AND wt.phase IS NULL",
                        $ws_id, $wahl_id
                    ));
                }
                if (empty($trows)) {
                    $trows = $wpdb->get_results($wpdb->prepare(
                        "SELECT t.vorname, t.nachname FROM {$prefix}kc_workshop_teamer wt ".
                        "JOIN {$prefix}kc_teamer t ON wt.teamer_id = t.id ".
                        "WHERE wt.workshop_id = %d AND wt.wahl_id IS NULL AND wt.phase IS NULL",
                        $ws_id
                    ));
                }
                if (!empty($trows)) {
                    $key = intval($ws_id) . '_' . intval($phase);
                    $ws_teamers[$key] = [];
                    foreach ($trows as $tr) {
                        $ws_teamers[$key][] = trim($tr->vorname.' '.$tr->nachname);
                    }
                }
            }
        }
    }

    // Gruppieren und sortieren wie im Frontend: erst nach Phase, dann Workshop, dann Teilnehmer
    // 1. Gruppieren nach Phase und Workshop
    $workshop_groups = [];
    $phases = [];
    foreach($rows as $row) {
        if ($row->phase === null || $row->phase === '') continue;
        $phaseNum = intval($row->phase);
        $phases[$phaseNum] = true;
        if ($row->workshop_id && isset($ws_names[$row->workshop_id])) {
            $workshop_groups[$phaseNum][$row->workshop_id][] = $row;
        }
    }
    $phases = array_keys($phases);
    sort($phases, SORT_NUMERIC);
    // 2. Pro Phase, pro Workshop (nur mit Teilnehmern), sortiert nach Teilnehmerzahl aufsteigend
    foreach($phases as $phase) {
        if (empty($workshop_groups[$phase])) continue;
        // Workshops mit Teilnehmern in dieser Phase
        $display = [];
        foreach($ws_names as $ws_id => $ws_name) {
            $teilnehmer = isset($workshop_groups[$phase][$ws_id]) ? $workshop_groups[$phase][$ws_id] : [];
            $count = count($teilnehmer);
            if ($count === 0) continue;
            $display[] = [
                'id' => $ws_id,
                'name' => $ws_name,
                'teilnehmer' => $teilnehmer,
                'count' => $count
            ];
        }
        // Sortieren nach Teilnehmerzahl aufsteigend
        usort($display, function($a, $b) { return $a['count'] - $b['count']; });
        foreach($display as $d) {
            $ws_id = $d['id'];
            $ws_name = $d['name'];
            $teilnehmer = $d['teilnehmer'];
            $teamer_key = intval($ws_id) . '_' . intval($phase);
            $teamer_str = !empty($ws_teamers[$teamer_key]) ? implode(', ', $ws_teamers[$teamer_key]) : '';
            // Teilnehmer sortieren (optional: nach Name)
            usort($teilnehmer, function($a, $b) {
                return strcmp($a->nachname . $a->vorname, $b->nachname . $b->vorname);
            });
            foreach($teilnehmer as $t) {
                $vorname = preg_replace('/<[^>]*>/', '', $t->vorname);
                $nachname = preg_replace('/<[^>]*>/', '', $t->nachname);
                $ws_name_clean = preg_replace('/<[^>]*>/', '', $ws_name);
                $teamer_str_clean = preg_replace('/<[^>]*>/', '', $teamer_str);
                $wunsch = $t->wunsch_rang == 0 ? "Vorzuteilung" : ($t->wunsch_rang > 0 ? intval($t->wunsch_rang).'.' : ($t->wunsch_rang==-1?"zugelost":""));
                $zuteilung = $t->wunsch_rang == 0 ? 'Vorzuteilung' : ($t->wunsch_rang==-1?'Zulosung':'Wunsch');
                fputcsv($output, [
                    $phase,
                    $ws_name_clean,
                    $teamer_str_clean,
                    $vorname,
                    $nachname,
                    $wunsch,
                    $zuteilung
                ]);
            }
        }
    }
    fclose($output);
    exit;
}

        // Anzahl Phasen der Wahl
        $phasen = intval($wahl->anzahl_einheiten);
        if ($phasen < 1) $phasen = 1;

        for ($phase = 1; $phase <= $phasen; $phase++) {
            echo '<details open style="margin:10px 0;padding:8px;border:1px solid #f0f0f0;border-radius:6px;">';
            echo '<summary style="font-weight:600;">Phase '.intval($phase).' &nbsp; <span style="color:#555;font-weight:600;">(' . intval(count(array_filter($rows, function($r) use ($phase){ return intval($r->phase) === $phase; }))) . ' TN)</span></summary>';

            // Für jede Workshop zeigen, falls Teilnehmer in dieser Phase zugeordnet sind
            foreach ($ws_names as $ws_id => $ws_name) {
                $filtered = array_filter($rows, function($r) use ($phase, $ws_id) {
                    return intval($r->phase) === $phase && intval($r->workshop_id) === intval($ws_id);
                });
                if (empty($filtered)) continue;
                echo '<div style="background:#f9f9f9;margin:8px 0;padding:10px;border-radius:8px;">';
                echo '<b>'.esc_html($ws_name).'</b> <span style="color:#555;font-size:90%">(' . count($filtered) . ' TN)</span><br>';
                echo '<table style="width:100%;margin:8px 0">';
                echo '<tr><th>Name</th><th>Wunsch</th><th>Workshop</th></tr>';
                foreach ($filtered as $t) {
                    $wunsch = $t->wunsch_rang == 0 ? "Vorzuteilung" : ($t->wunsch_rang > 0 ? intval($t->wunsch_rang).'.' : ($t->wunsch_rang==-1?"zugelost":""));
                    echo '<tr>';
                    echo '<td>'.esc_html($t->vorname.' '.$t->nachname).'</td>';
                    echo '<td>'.$wunsch.'</td>';
                    echo '<td>'.esc_html($ws_name).'</td>';
                    echo '</tr>';
                }
                echo '</table></div>';
            }

            // Teilnehmer dieser Phase ohne Workshop
            $unassigned_phase = array_filter($rows, function($r) use ($phase) { return intval($r->phase) === $phase && (empty($r->workshop_id) || !intval($r->workshop_id)); });
            if (!empty($unassigned_phase)) {
                echo '<div style="background:#fee;padding:10px;margin-top:8px;border-radius:8px;">';
                echo '<b>Nicht zugeteilt (Phase '.intval($phase).'):</b><br><ul style="margin:6px 0 0 16px;">';
                foreach($unassigned_phase as $t) {
                    echo '<li>'.esc_html($t->vorname.' '.$t->nachname).'</li>';
                }
                echo '</ul></div>';
            }

            echo '</details>';
        }

        echo '</details>';
    }
    echo '</div>';
}
?>