use GuzzleHttp\Client;

$client = new Client(['base_uri' => '{{BASE_URL}}']);

$response = $client->post('/authentication-token', [
    'json' => [
        'email'     => 'your-api-user@example.com',
        'password'  => 'your-password',
        'client_id' => 'your-client-id',
    ],
]);

$token = json_decode($response->getBody(), true)['token'];

// All subsequent requests:
$response = $client->get('/customers', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);

$response = $client->get('/customers', [
    'headers' => [
        'CLIENT-ID'  => 'your-client-id',
        'AUTH-TOKEN'  => 'your-auth-token',
    ],
]);

// Fetch invoices for March 2026
$response = $client->get('/invoices', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
    'query'   => [
        'invoiceDateFrom' => '2026-03-01',
        'invoiceDateTo'   => '2026-03-31',
        'exclude'         => ['invoiceLines', 'invoiceUploads'],
    ],
]);
$invoices = json_decode($response->getBody(), true)['hydra:member'];

foreach ($invoices as $invoice) {
    $invoiceId = $invoice['id'];

    $response = $client->get('/invoice-lines', [
        'headers' => ['Authorization' => 'Bearer ' . $token],
        'query'   => ['invoiceId' => $invoiceId],
    ]);
    $lines = json_decode($response->getBody(), true)['hydra:member'];

    // Process each line (description, amount, VAT, product, etc.)
    foreach ($lines as $line) {
        // Sync to your accounting system...
    }
}

foreach ($invoices as $invoice) {
    $invoiceId = $invoice['id'];

    $pdf = $client->get("/invoices/{$invoiceId}/get-pdf", [
        'headers' => ['Authorization' => 'Bearer ' . $token],
    ]);
    file_put_contents("invoices/invoice_{$invoiceId}.pdf", $pdf->getBody());
}

$response = $client->get('/customers', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
    'query'   => ['inTreeOfCustomerId' => 1234],
]);
$customers = json_decode($response->getBody(), true);

$response = $client->post('/customers', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
    'json'    => [
        'name'         => 'New Customer BV',
        'parent'       => '/customers/1234',
        'customerType' => '/customer-types/1',
        'reference'    => 'NC001',
        'invoiceEmail' => 'invoices@example.nl',
    ],
]);

$response = $client->get('/orders', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
    'query'   => ['customer.id' => 1234, 'includeTree' => 1],
]);
$orders = json_decode($response->getBody(), true);

$response = $client->get('/orders/5678/recurring-revenue', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$revenue = json_decode($response->getBody(), true);
// $revenue['activeRevenue'], $revenue['pendingRevenue']

$deals = $client->get('/billing-deals', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
    'query'   => [
        'invoicerId' => 1234,
        'onlyActive' => true,
        'type'       => 'sales',
    ],
]);

// Sum rateEnduser for monthly recurring revenue
$data = json_decode($deals->getBody(), true);
$mrr = array_sum(array_column($data, 'rateEnduser'));

$invoices = $client->get('/invoices', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
    'query'   => [
        'invoiceeId'    => 1234,
        'paymentStatus' => 'unpaid',
    ],
]);

// Download PDF:
$pdf = $client->get("/invoices/9999/get-pdf", [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
file_put_contents('invoice.pdf', $pdf->getBody());

$cdrTotals = $client->get('/cdr-totals', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
    'query'   => ['itemsPerPage' => 500],
]);
$data = json_decode($cdrTotals->getBody(), true);

// Find unbilled usage:
$unbilled = array_filter($data, fn($c) => $c['billingRuleId'] === null);

$response = $client->get('/service-orders', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
    'query'   => ['customer.id' => 1234],
]);
$orders = json_decode($response->getBody(), true);

// Cancel a pending service order
$client->post('/service-orders/7890/cancel', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);

$response = $client->get('/service-order-tasks', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
    'query'   => ['serviceOrder' => '/service-orders/123'],
]);
$tasks = json_decode($response->getBody(), true);

$response = $client->get('/service-order-products/456', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$product = json_decode($response->getBody(), true);

$response = $client->get('/users', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
    'query'   => ['customerId' => 1234],
]);
$users = json_decode($response->getBody(), true);

$response = $client->get('/contracts', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
    'query'   => ['contractee' => 1234],
]);
$contracts = json_decode($response->getBody(), true);

$response = $client->get('/contract-purchases', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
    'query'   => ['contract' => '/contracts/123'],
]);
$purchases = json_decode($response->getBody(), true);

$response = $client->get('/groups', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$groups = json_decode($response->getBody(), true);

$response = $client->get('/invoice-lines', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
    'query'   => ['invoiceId' => 9999],
]);
$lines = json_decode($response->getBody(), true);

$response = $client->get('/billing-rules', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
    'query'   => ['invoiceId' => 9999, 'itemsPerPage' => 500],
]);
$rules = json_decode($response->getBody(), true);

$response = $client->get('/cdrs', [
    'headers' => [
        'Authorization' => 'Bearer ' . $token,
        'Accept'        => 'text/csv',
    ],
]);
file_put_contents('cdrs_export.csv', $response->getBody());

$response = $client->get('/reports', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$reports = json_decode($response->getBody(), true);

$response = $client->get('/reports/42/export-csv', [
    'headers' => [
        'Authorization' => 'Bearer ' . $token,
        'Accept'        => 'text/csv',
    ],
]);
file_put_contents('report.csv', $response->getBody());

$response = $client->get('/raw-cdrs', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
    'query'   => ['itemsPerPage' => 5000],
]);
$rawCdrs = json_decode($response->getBody(), true);

$response = $client->get('/products/42/prices/1234', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$pricing = json_decode($response->getBody(), true);
// $pricing['finalPrice'], $pricing['isCustomerPrice']

$response = $client->get('/tariffplans', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
    'query'   => ['customerId' => 1234],
]);
$plans = json_decode($response->getBody(), true);

$response = $client->get('/product-categories', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$categories = json_decode($response->getBody(), true);

$response = $client->get('/product-groups', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$groups = json_decode($response->getBody(), true);

$response = $client->get('/product-plans', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$plans = json_decode($response->getBody(), true);

// Get products in a specific plan
$response = $client->get('/product-plan-products', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
    'query'   => ['productPlan' => '/product-plans/42'],
]);
$planProducts = json_decode($response->getBody(), true);

$response = $client->get('/phonenumbers', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
    'query'   => ['orderId' => 5678],
]);
$numbers = json_decode($response->getBody(), true);

$response = $client->patch('/phonenumbers/123', [
    'headers' => [
        'Authorization' => 'Bearer ' . $token,
        'Content-Type'  => 'application/merge-patch+json',
    ],
    'json' => [
        'costCenter'  => 'Sales',
        'description' => 'Reception line',
    ],
]);

$response = $client->get('/simcards', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$simcards = json_decode($response->getBody(), true);

$response = $client->get('/number-blocks', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$blocks = json_decode($response->getBody(), true)['hydra:member'];

// Split block 456 into blocks of size 10
$response = $client->get('/number-blocks/456/split/10', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);

// End cool-off period
$response = $client->get('/number-blocks/456/end-cool-off', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);

$response = $client->get('/areacodes', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$areacodes = json_decode($response->getBody(), true);

$response = $client->get('/tracking-devices', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$devices = json_decode($response->getBody(), true);

// Reseller-wide WIP
$response = $client->get('/dashboard/wip', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$mrr = json_decode($response->getBody(), true);
// Contains: mrr, active_mrr, wip_mrr, agency_mrr, etc.

$response = $client->get('/search/getResults', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
    'query'   => ['query' => 'acme', 'entity' => 'customer'],
]);
$results = json_decode($response->getBody(), true);
// Each result: id, entity, customerName, keyword, esScore, etc.

$response = $client->get('/call-logs', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
    'query'   => ['customer_id' => 1234],
]);
$logs = json_decode($response->getBody(), true)['hydra:member'];

$response = $client->post('/call-logs', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
    'json'    => [
        'customer_id'            => 1234,
        'subject'                => 'Contract renewal discussion',
        'additional_information' => 'Customer wants to upgrade to 1Gbps',
        'caller_name'            => 'Jan de Vries',
    ],
]);

$response = $client->get('/uploads/789/download', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
file_put_contents('downloaded_file.pdf', $response->getBody());

$response = $client->get('/service-types', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$serviceTypes = json_decode($response->getBody(), true);

$response = $client->get('/suppliers', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$suppliers = json_decode($response->getBody(), true);

$response = $client->get('/customer-types', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$types = json_decode($response->getBody(), true);

// List contact preferences
$response = $client->get('/contact-preferences', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);

// Delete a contact preference
$client->delete('/contact-preferences/123', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);

$response = $client->get('/locations/getIsraInformation/1234AB/10', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
    'query'   => ['housenumberExtension' => 'A'],
]);
$isra = json_decode($response->getBody(), true);
// $isra contains carrier type (COPPER/FIBER), FPI, SDF, MDF data

$response = $client->get('/order-details-connections/123', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$connection = json_decode($response->getBody(), true);

$response = $client->get('/order-details-generics/456', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$details = json_decode($response->getBody(), true);

$response = $client->get('/order-details-odido-mobile/789', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$odido = json_decode($response->getBody(), true);

// List X2VoIP accounts
$response = $client->get('/order-details-x2voips', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$accounts = json_decode($response->getBody(), true);

// Check SIP registration
$response = $client->get('/order-details-x2voips/registration/123', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$registration = json_decode($response->getBody(), true);

$response = $client->get('/order-details-x2voip-numbers/456', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$number = json_decode($response->getBody(), true);

$response = $client->get('/order-details-x2voip-efaxes/789', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$efax = json_decode($response->getBody(), true);

// List scheduled forwards
$response = $client->get('/order-details-x2voip-numbers-scheduled-forwards', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$forwards = json_decode($response->getBody(), true);

// Create a scheduled forward
$response = $client->post('/order-details-x2voip-numbers-scheduled-forwards', [
    'headers' => [
        'Authorization' => 'Bearer ' . $token,
        'Content-Type'  => 'application/json',
    ],
    'json' => [
        'orderDetailsX2voipNumber' => '/order-details-x2voip-numbers/456',
        'forwardTo' => '0612345678',
    ],
]);
$forward = json_decode($response->getBody(), true);

// List X2Mobile services
$response = $client->get('/order-details-x2mobiles', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$mobiles = json_decode($response->getBody(), true);

// Check current month data usage
$response = $client->get('/order-details-x2mobile/current-month-data-usage/0612345678', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$usage = json_decode($response->getBody(), true);

$response = $client->get('/order-details-youfones/123', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$youfone = json_decode($response->getBody(), true);

// Get network module details
$response = $client->get('/order-details-youfones/123/network-modules-details', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$modules = json_decode($response->getBody(), true);

$response = $client->get('/order-details-kpn-wba-by-order/789', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$kpnWba = json_decode($response->getBody(), true);

// List tracked objects
$response = $client->get('/order-details-tracked-objects', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$objects = json_decode($response->getBody(), true);

// Activate a subscription
$response = $client->post('/order-details-tracked-objects/123/activate-subscription', [
    'headers' => [
        'Authorization' => 'Bearer ' . $token,
        'Content-Type'  => 'application/json',
    ],
    'json' => ['product' => '/products/42'],
]);
$result = json_decode($response->getBody(), true);

$response = $client->get('/tracked-object-tracking-devices', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$devices = json_decode($response->getBody(), true);

$response = $client->get('/tracking-device-outages/report', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$outages = json_decode($response->getBody(), true);

// List outport requests
$response = $client->get('/outports', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$outports = json_decode($response->getBody(), true);

// Approve an outport
$response = $client->post('/outports/accept-outport', [
    'headers' => [
        'Authorization' => 'Bearer ' . $token,
        'Content-Type'  => 'application/json',
    ],
    'json' => ['id' => 123],
]);
$result = json_decode($response->getBody(), true);

$response = $client->get('/x2voip-routes', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$routes = json_decode($response->getBody(), true);

$response = $client->get('/x2voip-outbound-routes', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$outboundRoutes = json_decode($response->getBody(), true);

$response = $client->get('/x2voip-call-barrings', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$barrings = json_decode($response->getBody(), true);

$response = $client->get('/horizon-xdrs/search', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
    'query'   => ['customerId' => 1234],
]);
$xdrs = json_decode($response->getBody(), true);

$response = $client->get('/contact-person-types', [
    'headers' => ['Authorization' => 'Bearer ' . $token],
]);
$types = json_decode($response->getBody(), true);