<?php
/**
 * Company Monthly Stats & JoFotara Status
 */

use App\Core\Database;
use App\Core\Encryption;
use App\Middleware\AuthMiddleware;

// 1. Auth Check
$decoded = AuthMiddleware::check();
$db = Database::getInstance();

$companyId = $_GET['company_id'] ?? $_GET['id'] ?? null;
if (!$companyId) json_error('Company ID is required', 422);

$tenantId = $decoded['tenant_id'];
$role = $decoded['role'];

try {
    // 2. Permission Check
    if ($role === 'super_admin') {
        $stmt = $db->prepare("SELECT id, name, tax_identification_number, is_active, 
                                     (jofotara_client_id_encrypted IS NOT NULL) as is_jofotara_connected,
                                     jofotara_income_source_sequence
                              FROM companies WHERE id = ?");
        $stmt->execute([$companyId]);
    } else {
        $stmt = $db->prepare("SELECT id, name, tax_identification_number, is_active, 
                                     (jofotara_client_id_encrypted IS NOT NULL) as is_jofotara_connected,
                                     jofotara_income_source_sequence
                              FROM companies WHERE id = ? AND tenant_id = ?");
        $stmt->execute([$companyId, $tenantId]);
    }
    $company = $stmt->fetch();

    if (!$company) json_error('Company not found', 404);

    // Decrypt company name
    $dec = Encryption::decrypt($company['name']);
    $company['name'] = ($dec !== false && $dec !== '') ? $dec : $company['name'];

    // 3. Monthly Invoice Stats (including tax)
    $stmtStats = $db->prepare("
        SELECT 
            DATE_FORMAT(invoice_date, '%Y-%m') as month,
            COUNT(*) as total_invoices,
            SUM(CASE WHEN status='approved' THEN 1 ELSE 0 END) as approved_count,
            COALESCE(SUM(grand_total), 0) as total_amount,
            COALESCE(SUM(tax_amount), 0) as total_tax
        FROM invoices
        WHERE company_id = ? AND deleted_at IS NULL
        GROUP BY month
        ORDER BY month DESC
        LIMIT 12
    ");
    $stmtStats->execute([$companyId]);
    $monthly = $stmtStats->fetchAll();

    // 4. Lifetime Totals
    $stmtTotals = $db->prepare("
        SELECT 
            COUNT(*) as total_invoices,
            COALESCE(SUM(grand_total), 0) as total_amount,
            COALESCE(SUM(tax_amount), 0) as total_tax,
            SUM(CASE WHEN status='approved' THEN 1 ELSE 0 END) as approved_count
        FROM invoices
        WHERE company_id = ? AND deleted_at IS NULL
    ");
    $stmtTotals->execute([$companyId]);
    $totals = $stmtTotals->fetch();

    json_success([
        'company' => $company,
        'monthly' => $monthly,
        'totals'  => $totals
    ]);

} catch (\Exception $e) {
    error_log("Company Stats Error: " . $e->getMessage());
    json_error('Server error', 500);
}