<?php
/**
 * AJAX API voor Roadmap Beheer
 */

require_once __DIR__ . '/../includes/auth.php';
$user = require_auth();
$db = get_db_connection();

header('Content-Type: application/json');

$action = $_GET['action'] ?? ($_POST['action'] ?? '');

try {
    // 1. Roadmap item toevoegen
    if ($action === 'add_item') {
        $data = json_decode(file_get_contents('php://input'), true);
        $title = trim($data['title'] ?? '');
        $description = trim($data['description'] ?? '');
        $quarter = $data['quarter'] ?? 'Q3';
        $type = $data['type'] ?? 'FEATURE';
        $priority = $data['priority'] ?? 'MEDIUM';
        $dueDate = !empty($data['due_date']) ? $data['due_date'] : null;
        $jiraKey = !empty($data['jira_key']) ? trim($data['jira_key']) : null;

        if (empty($title)) {
            echo json_encode(['error' => 'Titel is verplicht']);
            exit;
        }

        $stmt = $db->prepare("
            INSERT INTO roadmap_items (title, description, quarter, type, priority, status, progress, due_date, jira_issue_key, created_by_id)
            VALUES (?, ?, ?, ?, ?, 'PLANNED', 0, ?, ?, ?)
        ");
        $stmt->execute([$title, $description, $quarter, $type, $priority, $dueDate, $jiraKey, $user['id']]);

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

    // 2. Status of voortgang bijwerken
    if ($action === 'update_item') {
        $data = json_decode(file_get_contents('php://input'), true);
        $id = (int)($data['id'] ?? 0);
        $status = $data['status'] ?? null;
        $progress = isset($data['progress']) ? (int)$data['progress'] : null;
        $jiraKey = isset($data['jira_key']) ? trim($data['jira_key']) : null;

        $fields = [];
        $params = [];

        if ($status !== null) {
            $fields[] = "status = ?";
            $params[] = $status;
        }
        if (isset($data['quarter']) && in_array($data['quarter'], ['Q1', 'Q2', 'Q3', 'Q4'], true)) {
            $fields[] = "quarter = ?";
            $params[] = $data['quarter'];
        }
        if ($progress !== null) {
            $fields[] = "progress = ?";
            $params[] = max(0, min(100, $progress));
        }
        if ($jiraKey !== null) {
            $fields[] = "jira_issue_key = ?";
            $params[] = $jiraKey;
        }

        if (!empty($fields)) {
            $params[] = $id;
            $sql = "UPDATE roadmap_items SET " . implode(", ", $fields) . " WHERE id = ?";
            $stmt = $db->prepare($sql);
            $stmt->execute($params);
        }

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

    // 3. Item verwijderen
    if ($action === 'delete_item') {
        $data = json_decode(file_get_contents('php://input'), true);
        $id = (int)($data['id'] ?? 0);

        $stmt = $db->prepare("DELETE FROM roadmap_items WHERE id = ?");
        $stmt->execute([$id]);

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

    echo json_encode(['error' => 'Onbekende actie']);
} catch (Exception $e) {
    http_response_code(500);
    echo json_encode(['error' => $e->getMessage()]);
}