<?php
require_once 'includes/session.php';
require_once 'db/config.php';

// Check if ID is provided
if (isset($_GET['id'])) {
    $id = $_GET['id'];
    $client_id = $_SESSION['client_id'];
    $pdo = db();

    // First, find the macro area to get its slug
    $stmt = $pdo->prepare("SELECT slug FROM macro_areas WHERE id = ? AND client_id = ?");
    $stmt->execute([$id, $client_id]);
    $macro_area = $stmt->fetch();

    // If the macro area exists, proceed with checks and deletion
    if ($macro_area) {
        $slug = $macro_area['slug'];

        // Check for dependent expenses
        $stmt = $pdo->prepare("SELECT COUNT(*) FROM expenses WHERE category = ? AND client_id = ?");
        $stmt->execute([$slug, $client_id]);
        $expense_count = $stmt->fetchColumn();

        if ($expense_count > 0) {
            // Dependencies found, set error message and redirect
            $_SESSION['error_message'] = "Não é possível excluir a macro área. Existem {$expense_count} despesas associadas.";
        } else {
            // No dependencies, proceed with deletion
            $stmt = $pdo->prepare("DELETE FROM macro_areas WHERE id = ? AND client_id = ?");
            $stmt->execute([$id, $client_id]);
            $_SESSION['success_message'] = "Macro área excluída com sucesso.";
        }
    }
    // If the macro area was not found, we just redirect without any message.

} else {
    // ID not specified in URL
    $_SESSION['error_message'] = "ID da macro área não especificado.";
}

// Redirect back to the list in all cases
header('Location: /Backend/macro_areas.php');
exit;
?>