<?php
/**
 * Fociz Board & Timeline Integratie Helper
 * Biedt functies om taken / e-mails / Jira tickets direct als kaarten toe te voegen aan Kanban-borden en Project Tijdlijnen.
 */

require_once __DIR__ . '/auth.php';

/**
 * Haalt alle actieve borden op waar de gebruiker toegang toe heeft, inclusief kolommen (lanes).
 */
function fociz_get_user_boards_with_lanes(PDO $db, int $userId, bool $isAdmin): array {
    if ($isAdmin) {
        $stmt = $db->query("
            SELECT b.id, b.title, b.description, b.created_by_id
            FROM boards b
            WHERE b.is_archived = 0
            ORDER BY b.id ASC
        ");
        $boards = $stmt->fetchAll();
    } else {
        $stmt = $db->prepare("
            SELECT b.id, b.title, b.description, b.created_by_id
            FROM boards b
            JOIN board_members bm ON b.id = bm.board_id
            WHERE bm.user_id = ? AND b.is_archived = 0
            ORDER BY b.id ASC
        ");
        $stmt->execute([$userId]);
        $boards = $stmt->fetchAll();
    }

    if (empty($boards)) {
        return [];
    }

    $boardIds = array_map(fn($b) => (int)$b['id'], $boards);
    $placeholders = implode(',', array_fill(0, count($boardIds), '?'));
    
    $laneStmt = $db->prepare("
        SELECT id, board_id, title, color, position
        FROM board_lanes
        WHERE board_id IN ({$placeholders})
        ORDER BY position ASC, id ASC
    ");
    $laneStmt->execute($boardIds);
    $lanes = $laneStmt->fetchAll();

    $lanesByBoard = [];
    foreach ($lanes as $lane) {
        $bId = (int)$lane['board_id'];
        $lanesByBoard[$bId][] = $lane;
    }

    foreach ($boards as &$b) {
        $bId = (int)$b['id'];
        $b['lanes'] = $lanesByBoard[$bId] ?? [];
    }
    unset($b);

    return $boards;
}

/**
 * Voegt een item toe aan een Kanban bord en optioneel aan de Project Tijdlijn.
 *
 * @param PDO $db Database verbinding
 * @param int $userId ID van de gebruiker
 * @param bool $isAdmin Is gebruiker admin
 * @param array $data Data array met:
 *   - board_id (int)
 *   - lane_id (int, optioneel - defaults naar 1e lane)
 *   - title (string)
 *   - description (string, optioneel)
 *   - priority ('P1'|'P2'|'P3', optioneel)
 *   - color (string, optioneel)
 *   - schedule_on_timeline (bool, optioneel)
 *   - start_date (string 'YYYY-MM-DD', optioneel)
 *   - end_date (string 'YYYY-MM-DD', optioneel)
 *   - start_time (string 'HH:MM', optioneel)
 *   - end_time (string 'HH:MM', optioneel)
 *   - sync_outlook (bool, optioneel)
 * @return array ['success' => bool, 'card_id' => int, 'message' => string]
 */
function fociz_add_item_to_board_and_timeline(PDO $db, int $userId, bool $isAdmin, array $data): array {
    $boardId = (int)($data['board_id'] ?? 0);
    $title = trim($data['title'] ?? '');
    if ($boardId <= 0 || empty($title)) {
        return ['success' => false, 'error' => 'Geldig bord en titel zijn verplicht.'];
    }

    // Autorisatiecheck
    if (!$isAdmin) {
        $stmtCheck = $db->prepare("SELECT COUNT(*) FROM board_members WHERE board_id = ? AND user_id = ?");
        $stmtCheck->execute([$boardId, $userId]);
        if ((int)$stmtCheck->fetchColumn() === 0) {
            return ['success' => false, 'error' => 'Geen toegang tot dit bord.'];
        }
    }

    $laneId = (int)($data['lane_id'] ?? 0);
    if ($laneId <= 0) {
        $stmtLane = $db->prepare("SELECT id FROM board_lanes WHERE board_id = ? ORDER BY position ASC, id ASC LIMIT 1");
        $stmtLane->execute([$boardId]);
        $laneId = (int)$stmtLane->fetchColumn();
    }

    if ($laneId <= 0) {
        return ['success' => false, 'error' => 'Het geselecteerde bord heeft geen kolommen.'];
    }

    $description = trim($data['description'] ?? '');
    $priority = in_array($data['priority'] ?? '', ['P1', 'P2', 'P3']) ? $data['priority'] : 'P2';
    $color = in_array($data['color'] ?? '', ['yellow', 'blue', 'green', 'purple', 'pink', 'orange', 'slate', 'indigo']) ? $data['color'] : 'blue';

    $stmtMax = $db->prepare("SELECT COALESCE(MAX(position), -1) FROM board_cards WHERE lane_id = ?");
    $stmtMax->execute([$laneId]);
    $maxPos = (int)$stmtMax->fetchColumn();

    $stmtInsert = $db->prepare("
        INSERT INTO board_cards (board_id, lane_id, title, description, assignee_id, priority, color, position, created_by_id)
        VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)
    ");
    $stmtInsert->execute([$boardId, $laneId, $title, $description, $userId, $priority, $color, $maxPos + 1, $userId]);
    $cardId = (int)$db->lastInsertId();

    // Optioneel inplannen op Tijdlijn / Gantt
    $scheduleOnTimeline = !empty($data['schedule_on_timeline']);
    if ($scheduleOnTimeline && $cardId > 0) {
        $startDate = !empty($data['start_date']) ? trim($data['start_date']) : date('Y-m-d');
        $endDate = !empty($data['end_date']) ? trim($data['end_date']) : $startDate;
        $startTime = !empty($data['start_time']) ? trim($data['start_time']) : '09:00';
        $endTime = !empty($data['end_time']) ? trim($data['end_time']) : '17:00';
        $daysOfWeek = trim($data['days_of_week'] ?? '1,2,3,4,5');

        $stmtSched = $db->prepare("
            INSERT INTO board_card_schedules (card_id, schedule_type, start_date, end_date, start_time, end_time, days_of_week)
            VALUES (?, 'DAILY_RANGE', ?, ?, ?, ?, ?)
            ON DUPLICATE KEY UPDATE
                start_date = VALUES(start_date),
                end_date = VALUES(end_date),
                start_time = VALUES(start_time),
                end_time = VALUES(end_time),
                days_of_week = VALUES(days_of_week)
        ");
        $stmtSched->execute([$cardId, $startDate, $endDate, $startTime, $endTime, $daysOfWeek]);
    }

    return [
        'success' => true,
        'card_id' => $cardId,
        'board_id' => $boardId,
        'lane_id' => $laneId,
        'scheduled_on_timeline' => $scheduleOnTimeline,
        'message' => $scheduleOnTimeline 
            ? 'Item succesvol toegevoegd aan het Bord en ingepland op de Tijdlijn!' 
            : 'Item succesvol toegevoegd aan het Bord!'
    ];
}