<?php
require_once __DIR__ . '/../includes/uuid.php';
require_once __DIR__ . '/../db/config.php';

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

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    http_response_code(405);
    echo json_encode(['error' => 'Method not allowed']);
    exit();
}

$data = json_decode(file_get_contents('php://input'), true);

if (empty($data['vendor_name'])) {
    http_response_code(400);
    echo json_encode(['error' => 'Vendor name is required']);
    exit();
}

$pdo = db();

try {
    $pdo->beginTransaction();

    // 1. Create subledger entry for the vendor
    $subledger_id = uuid_v4();
    $stmt = $pdo->prepare("INSERT INTO subledgers (subledger_id, subledger_type, reference_id) VALUES (?, 'Vendor', ?)");
    $vendor_id = uuid_v4(); // Generate vendor ID ahead of time to link it
    $stmt->execute([$subledger_id, $vendor_id]);

    // 2. Create the vendor
    $stmt = $pdo->prepare(
        "INSERT INTO vendors (vendor_id, subledger_id, vendor_name, contact_person, email, phone, address) VALUES (?, ?, ?, ?, ?, ?, ?)"
    );
    $stmt->execute([
        $vendor_id,
        $subledger_id,
        $data['vendor_name'],
        $data['contact_person'] ?? null,
        $data['email'] ?? null,
        $data['phone'] ?? null,
        $data['address'] ?? null
    ]);

    $pdo->commit();

    // Fetch and return the created vendor data
    $stmt = $pdo->prepare("SELECT * FROM vendors WHERE vendor_id = ?");
    $stmt->execute([$vendor_id]);
    $new_vendor = $stmt->fetch(PDO::FETCH_ASSOC);

    http_response_code(201);
    echo json_encode($new_vendor);

} catch (PDOException $e) {
    $pdo->rollBack();
    http_response_code(500);
    echo json_encode(['error' => 'Database error: ' . $e->getMessage()]);
}