<?php

declare(strict_types=1);

use Barryvdh\DomPDF\Facade\Pdf;
use Core\Mod\Commerce\Mail\InvoiceGenerated;
use Core\Mod\Commerce\Models\Invoice;
use Core\Mod\Commerce\Models\InvoiceItem;
use Core\Mod\Commerce\Models\Order;
use Core\Mod\Commerce\Models\OrderItem;
use Core\Mod\Commerce\Models\Payment;
use Core\Mod\Commerce\Models\TaxRate;
use Core\Mod\Commerce\Services\InvoiceService;
use Core\Tenant\Models\User;
use Core\Tenant\Models\Workspace;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Pagination\LengthAwarePaginator;
use Illuminate\Support\Facades\Mail;
use Illuminate\Support\Facades\Storage;

uses(RefreshDatabase::class);

beforeEach(function () {
    Mail::fake();
    Storage::fake('local');

    $this->user = User::factory()->create();
    $this->workspace = Workspace::factory()->create([
        'billing_email' => 'billing@example.com',
        'billing_name' => 'Test Company',
        'billing_country' => 'GB',
    ]);
    $this->workspace->users()->attach($this->user->id, [
        'role' => 'owner',
        'is_default' => true,
    ]);

    // Seed UK VAT rate for tax calculations
    TaxRate::create([
        'country_code' => 'GB',
        'name' => 'UK VAT',
        'type' => 'vat',
        'rate' => 20.00,
        'is_digital_services' => true,
        'effective_from' => '2020-01-01',
        'is_active' => true,
    ]);

    $this->service = app(InvoiceService::class);
});

describe('InvoiceService', function () {
    describe('createFromOrder()', function () {
        it('creates an invoice from an order without payment', function () {
            $order = Order::create([
                'orderable_type' => Workspace::class,
                'orderable_id' => $this->workspace->id,
                'user_id' => $this->user->id,
                'order_number' => 'ORD-20260324-ABC123',
                'status' => 'pending',
                'type' => 'subscription',
                'currency' => 'GBP',
                'subtotal' => 100.00,
                'tax_amount' => 20.00,
                'tax_rate' => 20.00,
                'tax_country' => 'GB',
                'discount_amount' => 0,
                'total' => 120.00,
                'billing_name' => 'Test Company',
                'billing_email' => 'billing@example.com',
            ]);

            OrderItem::create([
                'order_id' => $order->id,
                'item_type' => 'package',
                'description' => 'Creator Plan (Monthly)',
                'quantity' => 1,
                'unit_price' => 100.00,
                'line_total' => 120.00,
                'billing_cycle' => 'monthly',
            ]);

            $invoice = $this->service->createFromOrder($order);

            expect($invoice)->toBeInstanceOf(Invoice::class)
                ->and($invoice->workspace_id)->toBe($this->workspace->id)
                ->and($invoice->order_id)->toBe($order->id)
                ->and($invoice->payment_id)->toBeNull()
                ->and($invoice->status)->toBe('pending')
                ->and((float) $invoice->subtotal)->toBe(100.00)
                ->and((float) $invoice->tax_amount)->toBe(20.00)
                ->and((float) $invoice->total)->toBe(120.00)
                ->and((float) $invoice->amount_paid)->toBe(0.00)
                ->and((float) $invoice->amount_due)->toBe(120.00)
                ->and($invoice->currency)->toBe('GBP')
                ->and($invoice->billing_name)->toBe('Test Company')
                ->and($invoice->billing_email)->toBe('billing@example.com')
                ->and($invoice->invoice_number)->toStartWith('INV-');
        });

        it('creates a paid invoice when payment is provided', function () {
            $order = Order::create([
                'orderable_type' => Workspace::class,
                'orderable_id' => $this->workspace->id,
                'user_id' => $this->user->id,
                'order_number' => 'ORD-20260324-DEF456',
                'status' => 'paid',
                'type' => 'subscription',
                'currency' => 'GBP',
                'subtotal' => 49.00,
                'tax_amount' => 9.80,
                'tax_rate' => 20.00,
                'tax_country' => 'GB',
                'discount_amount' => 0,
                'total' => 58.80,
                'billing_name' => 'Test Company',
                'billing_email' => 'billing@example.com',
            ]);

            OrderItem::create([
                'order_id' => $order->id,
                'item_type' => 'package',
                'description' => 'Agency Plan (Monthly)',
                'quantity' => 1,
                'unit_price' => 49.00,
                'line_total' => 58.80,
                'billing_cycle' => 'monthly',
            ]);

            $payment = Payment::create([
                'workspace_id' => $this->workspace->id,
                'gateway' => 'stripe',
                'gateway_payment_id' => 'pi_test_paid',
                'amount' => 58.80,
                'fee' => 1.50,
                'net_amount' => 57.30,
                'refunded_amount' => 0,
                'currency' => 'GBP',
                'status' => 'succeeded',
                'paid_at' => now(),
            ]);

            $invoice = $this->service->createFromOrder($order, $payment);

            expect($invoice->status)->toBe('paid')
                ->and($invoice->payment_id)->toBe($payment->id)
                ->and((float) $invoice->amount_paid)->toBe(58.80)
                ->and((float) $invoice->amount_due)->toBe(0.00)
                ->and($invoice->paid_at)->not->toBeNull();
        });

        it('copies line items from the order to the invoice', function () {
            $order = Order::create([
                'orderable_type' => Workspace::class,
                'orderable_id' => $this->workspace->id,
                'user_id' => $this->user->id,
                'order_number' => 'ORD-20260324-GHI789',
                'status' => 'pending',
                'type' => 'subscription',
                'currency' => 'GBP',
                'subtotal' => 68.00,
                'tax_amount' => 13.60,
                'tax_rate' => 20.00,
                'tax_country' => 'GB',
                'discount_amount' => 0,
                'total' => 81.60,
                'billing_name' => 'Test Company',
                'billing_email' => 'billing@example.com',
            ]);

            $item1 = OrderItem::create([
                'order_id' => $order->id,
                'item_type' => 'package',
                'description' => 'Agency Plan (Monthly)',
                'quantity' => 1,
                'unit_price' => 49.00,
                'line_total' => 58.80,
                'billing_cycle' => 'monthly',
            ]);

            $item2 = OrderItem::create([
                'order_id' => $order->id,
                'item_type' => 'addon',
                'description' => 'Extra Storage',
                'quantity' => 2,
                'unit_price' => 9.50,
                'line_total' => 22.80,
                'billing_cycle' => 'monthly',
            ]);

            $invoice = $this->service->createFromOrder($order);

            $invoiceItems = $invoice->items;
            expect($invoiceItems)->toHaveCount(2);

            $firstItem = $invoiceItems->where('order_item_id', $item1->id)->first();
            expect($firstItem)->not->toBeNull()
                ->and($firstItem->description)->toBe('Agency Plan (Monthly)')
                ->and($firstItem->quantity)->toBe(1)
                ->and((float) $firstItem->unit_price)->toBe(49.00)
                ->and((float) $firstItem->line_total)->toBe(58.80);

            $secondItem = $invoiceItems->where('order_item_id', $item2->id)->first();
            expect($secondItem)->not->toBeNull()
                ->and($secondItem->description)->toBe('Extra Storage')
                ->and($secondItem->quantity)->toBe(2)
                ->and((float) $secondItem->unit_price)->toBe(9.50)
                ->and((float) $secondItem->line_total)->toBe(22.80);
        });

        it('generates sequential invoice numbers within a year', function () {
            $order = Order::create([
                'orderable_type' => Workspace::class,
                'orderable_id' => $this->workspace->id,
                'user_id' => $this->user->id,
                'order_number' => 'ORD-20260324-SEQ001',
                'status' => 'pending',
                'type' => 'subscription',
                'currency' => 'GBP',
                'subtotal' => 19.00,
                'tax_amount' => 0,
                'discount_amount' => 0,
                'total' => 19.00,
                'billing_name' => 'Test Company',
                'billing_email' => 'billing@example.com',
            ]);

            // Ensure at least one order item exists for the relationship
            OrderItem::create([
                'order_id' => $order->id,
                'item_type' => 'package',
                'description' => 'Plan',
                'quantity' => 1,
                'unit_price' => 19.00,
                'line_total' => 19.00,
                'billing_cycle' => 'monthly',
            ]);

            $invoice1 = $this->service->createFromOrder($order);

            $order2 = Order::create([
                'orderable_type' => Workspace::class,
                'orderable_id' => $this->workspace->id,
                'user_id' => $this->user->id,
                'order_number' => 'ORD-20260324-SEQ002',
                'status' => 'pending',
                'type' => 'subscription',
                'currency' => 'GBP',
                'subtotal' => 29.00,
                'tax_amount' => 0,
                'discount_amount' => 0,
                'total' => 29.00,
                'billing_name' => 'Test Company',
                'billing_email' => 'billing@example.com',
            ]);

            OrderItem::create([
                'order_id' => $order2->id,
                'item_type' => 'package',
                'description' => 'Plan 2',
                'quantity' => 1,
                'unit_price' => 29.00,
                'line_total' => 29.00,
                'billing_cycle' => 'monthly',
            ]);

            $invoice2 = $this->service->createFromOrder($order2);

            // Both should have valid prefixed invoice numbers
            $year = now()->format('Y');
            expect($invoice1->invoice_number)->toMatch("/^INV-{$year}-\\d{4}$/")
                ->and($invoice2->invoice_number)->toMatch("/^INV-{$year}-\\d{4}$/");

            // Second invoice number should be greater than first
            $num1 = (int) substr($invoice1->invoice_number, -4);
            $num2 = (int) substr($invoice2->invoice_number, -4);
            expect($num2)->toBe($num1 + 1);
        });

        it('sets correct due date from config', function () {
            config(['commerce.billing.invoice_due_days' => 30]);

            $order = Order::create([
                'orderable_type' => Workspace::class,
                'orderable_id' => $this->workspace->id,
                'user_id' => $this->user->id,
                'order_number' => 'ORD-20260324-DUE001',
                'status' => 'pending',
                'type' => 'subscription',
                'currency' => 'GBP',
                'subtotal' => 19.00,
                'tax_amount' => 0,
                'discount_amount' => 0,
                'total' => 19.00,
                'billing_name' => 'Test Company',
                'billing_email' => 'billing@example.com',
            ]);

            OrderItem::create([
                'order_id' => $order->id,
                'item_type' => 'package',
                'description' => 'Plan',
                'quantity' => 1,
                'unit_price' => 19.00,
                'line_total' => 19.00,
                'billing_cycle' => 'monthly',
            ]);

            $invoice = $this->service->createFromOrder($order);

            expect($invoice->issue_date->toDateString())->toBe(now()->toDateString())
                ->and($invoice->due_date->toDateString())->toBe(now()->addDays(30)->toDateString());
        });
    });

    describe('createForRenewal()', function () {
        it('creates a pending invoice for subscription renewal', function () {
            $invoice = $this->service->createForRenewal(
                $this->workspace,
                19.00,
                'Creator Plan - Monthly Renewal'
            );

            expect($invoice)->toBeInstanceOf(Invoice::class)
                ->and($invoice->workspace_id)->toBe($this->workspace->id)
                ->and($invoice->status)->toBe('pending')
                ->and((float) $invoice->subtotal)->toBe(19.00)
                ->and((float) $invoice->amount_due)->toBeGreaterThan(0.0)
                ->and((float) $invoice->amount_paid)->toBe(0.00)
                ->and($invoice->billing_name)->toBe('Test Company')
                ->and($invoice->billing_email)->toBe('billing@example.com');
        });

        it('creates a paid renewal invoice when payment is provided', function () {
            $payment = Payment::create([
                'workspace_id' => $this->workspace->id,
                'gateway' => 'btcpay',
                'gateway_payment_id' => 'btc_renewal_001',
                'amount' => 22.80,
                'fee' => 0,
                'net_amount' => 22.80,
                'refunded_amount' => 0,
                'currency' => 'GBP',
                'status' => 'succeeded',
                'paid_at' => now(),
            ]);

            $invoice = $this->service->createForRenewal(
                $this->workspace,
                19.00,
                'Creator Plan - Monthly Renewal',
                $payment
            );

            expect($invoice->status)->toBe('paid')
                ->and($invoice->payment_id)->toBe($payment->id)
                ->and((float) $invoice->amount_due)->toBe(0.00)
                ->and($invoice->paid_at)->not->toBeNull();
        });

        it('calculates tax correctly for UK workspace', function () {
            $invoice = $this->service->createForRenewal(
                $this->workspace,
                100.00,
                'Agency Plan - Monthly Renewal'
            );

            // UK VAT at 20%
            expect((float) $invoice->subtotal)->toBe(100.00)
                ->and((float) $invoice->tax_amount)->toBe(20.00)
                ->and((float) $invoice->tax_rate)->toBe(20.00)
                ->and((float) $invoice->total)->toBe(120.00)
                ->and($invoice->tax_country)->toBe('GB');
        });

        it('creates a single line item for the renewal', function () {
            $invoice = $this->service->createForRenewal(
                $this->workspace,
                49.00,
                'Agency Plan - Monthly Renewal'
            );

            $items = $invoice->items;
            expect($items)->toHaveCount(1);

            $item = $items->first();
            expect($item->description)->toBe('Agency Plan - Monthly Renewal')
                ->and($item->quantity)->toBe(1)
                ->and((float) $item->unit_price)->toBe(49.00)
                ->and((float) $item->tax_rate)->toBe(20.00)
                ->and((float) $item->tax_amount)->toBe(9.80);
        });

        it('uses the configured default currency', function () {
            config(['commerce.currency' => 'USD']);

            $invoice = $this->service->createForRenewal(
                $this->workspace,
                19.00,
                'Creator Plan - Monthly Renewal'
            );

            expect($invoice->currency)->toBe('USD');
        });
    });

    describe('markAsPaid()', function () {
        it('transitions invoice from pending to paid', function () {
            $invoice = Invoice::create([
                'workspace_id' => $this->workspace->id,
                'invoice_number' => 'INV-2026-1001',
                'status' => 'pending',
                'subtotal' => 19.00,
                'tax_amount' => 3.80,
                'discount_amount' => 0,
                'total' => 22.80,
                'amount_paid' => 0,
                'amount_due' => 22.80,
                'currency' => 'GBP',
                'issue_date' => now(),
                'due_date' => now()->addDays(14),
            ]);

            $payment = Payment::create([
                'workspace_id' => $this->workspace->id,
                'gateway' => 'stripe',
                'gateway_payment_id' => 'pi_mark_paid',
                'amount' => 22.80,
                'fee' => 0.50,
                'net_amount' => 22.30,
                'refunded_amount' => 0,
                'currency' => 'GBP',
                'status' => 'succeeded',
                'paid_at' => now(),
            ]);

            $this->service->markAsPaid($invoice, $payment);

            $invoice->refresh();
            expect($invoice->status)->toBe('paid')
                ->and($invoice->payment_id)->toBe($payment->id)
                ->and((float) $invoice->amount_paid)->toBe(22.80)
                ->and((float) $invoice->amount_due)->toBe(0.00)
                ->and($invoice->paid_at)->not->toBeNull();
        });
    });

    describe('void()', function () {
        it('transitions invoice to void status', function () {
            $invoice = Invoice::create([
                'workspace_id' => $this->workspace->id,
                'invoice_number' => 'INV-2026-2001',
                'status' => 'pending',
                'subtotal' => 19.00,
                'tax_amount' => 0,
                'discount_amount' => 0,
                'total' => 19.00,
                'amount_paid' => 0,
                'amount_due' => 19.00,
                'currency' => 'GBP',
                'issue_date' => now(),
                'due_date' => now()->addDays(14),
            ]);

            $this->service->void($invoice);

            $invoice->refresh();
            expect($invoice->status)->toBe('void')
                ->and($invoice->isVoid())->toBeTrue();
        });
    });

    describe('generatePdf()', function () {
        it('generates a PDF and stores it on disk', function () {
            $invoice = Invoice::create([
                'workspace_id' => $this->workspace->id,
                'invoice_number' => 'INV-2026-3001',
                'status' => 'paid',
                'subtotal' => 49.00,
                'tax_amount' => 9.80,
                'discount_amount' => 0,
                'total' => 58.80,
                'amount_paid' => 58.80,
                'amount_due' => 0,
                'currency' => 'GBP',
                'issue_date' => now(),
                'due_date' => now()->addDays(14),
                'paid_at' => now(),
            ]);

            InvoiceItem::create([
                'invoice_id' => $invoice->id,
                'description' => 'Agency Plan (Monthly)',
                'quantity' => 1,
                'unit_price' => 49.00,
                'line_total' => 58.80,
                'tax_rate' => 20.00,
                'tax_amount' => 9.80,
            ]);

            // Mock the PDF facade
            $mockPdf = Mockery::mock();
            $mockPdf->shouldReceive('output')->andReturn('%PDF-1.4 fake content');
            Pdf::shouldReceive('loadView')
                ->once()
                ->with('commerce::pdf.invoice', Mockery::type('array'))
                ->andReturn($mockPdf);

            $filename = $this->service->generatePdf($invoice);

            expect($filename)->toContain($invoice->invoice_number)
                ->and($filename)->toContain((string) $this->workspace->id);

            Storage::disk('local')->assertExists($filename);

            $invoice->refresh();
            expect($invoice->pdf_path)->toBe($filename);
        });

        it('stores PDF in configured storage path', function () {
            config(['commerce.pdf.storage_path' => 'custom-invoices']);

            $invoice = Invoice::create([
                'workspace_id' => $this->workspace->id,
                'invoice_number' => 'INV-2026-3002',
                'status' => 'paid',
                'subtotal' => 19.00,
                'tax_amount' => 0,
                'discount_amount' => 0,
                'total' => 19.00,
                'amount_paid' => 19.00,
                'amount_due' => 0,
                'currency' => 'GBP',
                'issue_date' => now(),
                'due_date' => now()->addDays(14),
                'paid_at' => now(),
            ]);

            $mockPdf = Mockery::mock();
            $mockPdf->shouldReceive('output')->andReturn('%PDF-1.4 fake content');
            Pdf::shouldReceive('loadView')->andReturn($mockPdf);

            $filename = $this->service->generatePdf($invoice);

            expect($filename)->toStartWith('custom-invoices/');
        });
    });

    describe('getPdf()', function () {
        it('returns existing PDF path when file exists on disk', function () {
            $invoice = Invoice::create([
                'workspace_id' => $this->workspace->id,
                'invoice_number' => 'INV-2026-4001',
                'status' => 'paid',
                'subtotal' => 19.00,
                'tax_amount' => 0,
                'discount_amount' => 0,
                'total' => 19.00,
                'amount_paid' => 19.00,
                'amount_due' => 0,
                'currency' => 'GBP',
                'issue_date' => now(),
                'due_date' => now()->addDays(14),
                'pdf_path' => "invoices/{$this->workspace->id}/INV-2026-4001.pdf",
            ]);

            // Put a file on the faked disk
            Storage::disk('local')->put($invoice->pdf_path, 'existing pdf content');

            $path = $this->service->getPdf($invoice);

            expect($path)->toBe($invoice->pdf_path);
        });

        it('generates a new PDF when file does not exist', function () {
            $invoice = Invoice::create([
                'workspace_id' => $this->workspace->id,
                'invoice_number' => 'INV-2026-4002',
                'status' => 'paid',
                'subtotal' => 19.00,
                'tax_amount' => 0,
                'discount_amount' => 0,
                'total' => 19.00,
                'amount_paid' => 19.00,
                'amount_due' => 0,
                'currency' => 'GBP',
                'issue_date' => now(),
                'due_date' => now()->addDays(14),
                'pdf_path' => null,
            ]);

            $mockPdf = Mockery::mock();
            $mockPdf->shouldReceive('output')->andReturn('%PDF-1.4 fake content');
            Pdf::shouldReceive('loadView')->andReturn($mockPdf);

            $path = $this->service->getPdf($invoice);

            expect($path)->toContain($invoice->invoice_number);
            Storage::disk('local')->assertExists($path);
        });
    });

    describe('sendEmail()', function () {
        it('queues an invoice email to the billing address', function () {
            $invoice = Invoice::create([
                'workspace_id' => $this->workspace->id,
                'invoice_number' => 'INV-2026-5001',
                'status' => 'paid',
                'subtotal' => 19.00,
                'tax_amount' => 0,
                'discount_amount' => 0,
                'total' => 19.00,
                'amount_paid' => 19.00,
                'amount_due' => 0,
                'currency' => 'GBP',
                'billing_email' => 'invoices@example.com',
                'issue_date' => now(),
                'due_date' => now()->addDays(14),
                'pdf_path' => "invoices/{$this->workspace->id}/INV-2026-5001.pdf",
            ]);

            // Ensure the PDF exists so getPdf returns immediately
            Storage::disk('local')->put($invoice->pdf_path, 'pdf content');

            $this->service->sendEmail($invoice);

            Mail::assertQueued(InvoiceGenerated::class, function ($mailable) {
                return $mailable->hasTo('invoices@example.com');
            });
        });

        it('does not send email when config is disabled', function () {
            config(['commerce.billing.send_invoice_emails' => false]);

            $invoice = Invoice::create([
                'workspace_id' => $this->workspace->id,
                'invoice_number' => 'INV-2026-5002',
                'status' => 'paid',
                'subtotal' => 19.00,
                'tax_amount' => 0,
                'discount_amount' => 0,
                'total' => 19.00,
                'amount_paid' => 19.00,
                'amount_due' => 0,
                'currency' => 'GBP',
                'billing_email' => 'invoices@example.com',
                'issue_date' => now(),
                'due_date' => now()->addDays(14),
            ]);

            $this->service->sendEmail($invoice);

            Mail::assertNothingQueued();
        });

        it('does not send email when no recipient can be resolved', function () {
            $invoice = Invoice::create([
                'workspace_id' => $this->workspace->id,
                'invoice_number' => 'INV-2026-5003',
                'status' => 'paid',
                'subtotal' => 19.00,
                'tax_amount' => 0,
                'discount_amount' => 0,
                'total' => 19.00,
                'amount_paid' => 19.00,
                'amount_due' => 0,
                'currency' => 'GBP',
                'billing_email' => null,
                'issue_date' => now(),
                'due_date' => now()->addDays(14),
                'pdf_path' => "invoices/{$this->workspace->id}/INV-2026-5003.pdf",
            ]);

            // Clear workspace billing email so fallback also fails
            $this->workspace->update(['billing_email' => null]);

            Storage::disk('local')->put($invoice->pdf_path, 'pdf content');

            $this->service->sendEmail($invoice);

            Mail::assertNothingQueued();
        });
    });

    describe('getForWorkspace()', function () {
        it('returns paginated invoices for a workspace', function () {
            // Create several invoices
            foreach (range(1, 5) as $i) {
                Invoice::create([
                    'workspace_id' => $this->workspace->id,
                    'invoice_number' => "INV-2026-600{$i}",
                    'status' => $i <= 3 ? 'paid' : 'pending',
                    'subtotal' => 19.00,
                    'tax_amount' => 0,
                    'discount_amount' => 0,
                    'total' => 19.00,
                    'amount_paid' => $i <= 3 ? 19.00 : 0,
                    'amount_due' => $i <= 3 ? 0 : 19.00,
                    'currency' => 'GBP',
                    'issue_date' => now(),
                    'due_date' => now()->addDays(14),
                ]);
            }

            $result = $this->service->getForWorkspace($this->workspace, 3);

            expect($result)->toBeInstanceOf(LengthAwarePaginator::class)
                ->and($result->total())->toBe(5)
                ->and($result->perPage())->toBe(3)
                ->and($result->count())->toBe(3);
        });

        it('does not return invoices from other workspaces', function () {
            $otherWorkspace = Workspace::factory()->create();

            Invoice::create([
                'workspace_id' => $this->workspace->id,
                'invoice_number' => 'INV-2026-6010',
                'status' => 'paid',
                'subtotal' => 19.00,
                'tax_amount' => 0,
                'discount_amount' => 0,
                'total' => 19.00,
                'amount_paid' => 19.00,
                'amount_due' => 0,
                'currency' => 'GBP',
                'issue_date' => now(),
                'due_date' => now()->addDays(14),
            ]);

            Invoice::create([
                'workspace_id' => $otherWorkspace->id,
                'invoice_number' => 'INV-2026-6011',
                'status' => 'paid',
                'subtotal' => 29.00,
                'tax_amount' => 0,
                'discount_amount' => 0,
                'total' => 29.00,
                'amount_paid' => 29.00,
                'amount_due' => 0,
                'currency' => 'GBP',
                'issue_date' => now(),
                'due_date' => now()->addDays(14),
            ]);

            $result = $this->service->getForWorkspace($this->workspace);

            expect($result->total())->toBe(1);
        });
    });

    describe('getUnpaidForWorkspace()', function () {
        it('returns pending invoices that are not yet due', function () {
            // Pending, not yet due
            Invoice::create([
                'workspace_id' => $this->workspace->id,
                'invoice_number' => 'INV-2026-7001',
                'status' => 'pending',
                'subtotal' => 19.00,
                'tax_amount' => 0,
                'discount_amount' => 0,
                'total' => 19.00,
                'amount_paid' => 0,
                'amount_due' => 19.00,
                'currency' => 'GBP',
                'issue_date' => now(),
                'due_date' => now()->addDays(14),
            ]);

            // Paid invoice (should not appear)
            Invoice::create([
                'workspace_id' => $this->workspace->id,
                'invoice_number' => 'INV-2026-7002',
                'status' => 'paid',
                'subtotal' => 29.00,
                'tax_amount' => 0,
                'discount_amount' => 0,
                'total' => 29.00,
                'amount_paid' => 29.00,
                'amount_due' => 0,
                'currency' => 'GBP',
                'issue_date' => now(),
                'due_date' => now()->addDays(14),
            ]);

            // Overdue invoice (due_date in the past, should not appear)
            Invoice::create([
                'workspace_id' => $this->workspace->id,
                'invoice_number' => 'INV-2026-7003',
                'status' => 'pending',
                'subtotal' => 39.00,
                'tax_amount' => 0,
                'discount_amount' => 0,
                'total' => 39.00,
                'amount_paid' => 0,
                'amount_due' => 39.00,
                'currency' => 'GBP',
                'issue_date' => now()->subDays(30),
                'due_date' => now()->subDays(7),
            ]);

            $unpaid = $this->service->getUnpaidForWorkspace($this->workspace);

            expect($unpaid)->toHaveCount(1)
                ->and($unpaid->first()->invoice_number)->toBe('INV-2026-7001');
        });
    });

    describe('getOverdueForWorkspace()', function () {
        it('returns pending invoices that are past due', function () {
            // Overdue pending
            Invoice::create([
                'workspace_id' => $this->workspace->id,
                'invoice_number' => 'INV-2026-8001',
                'status' => 'pending',
                'subtotal' => 19.00,
                'tax_amount' => 0,
                'discount_amount' => 0,
                'total' => 19.00,
                'amount_paid' => 0,
                'amount_due' => 19.00,
                'currency' => 'GBP',
                'issue_date' => now()->subDays(30),
                'due_date' => now()->subDays(7),
            ]);

            // Not yet due (should not appear)
            Invoice::create([
                'workspace_id' => $this->workspace->id,
                'invoice_number' => 'INV-2026-8002',
                'status' => 'pending',
                'subtotal' => 29.00,
                'tax_amount' => 0,
                'discount_amount' => 0,
                'total' => 29.00,
                'amount_paid' => 0,
                'amount_due' => 29.00,
                'currency' => 'GBP',
                'issue_date' => now(),
                'due_date' => now()->addDays(14),
            ]);

            // Paid (should not appear)
            Invoice::create([
                'workspace_id' => $this->workspace->id,
                'invoice_number' => 'INV-2026-8003',
                'status' => 'paid',
                'subtotal' => 39.00,
                'tax_amount' => 0,
                'discount_amount' => 0,
                'total' => 39.00,
                'amount_paid' => 39.00,
                'amount_due' => 0,
                'currency' => 'GBP',
                'issue_date' => now()->subDays(30),
                'due_date' => now()->subDays(7),
            ]);

            $overdue = $this->service->getOverdueForWorkspace($this->workspace);

            expect($overdue)->toHaveCount(1)
                ->and($overdue->first()->invoice_number)->toBe('INV-2026-8001');
        });
    });
});

describe('Invoice model', function () {
    beforeEach(function () {
        $this->invoice = Invoice::create([
            'workspace_id' => $this->workspace->id,
            'invoice_number' => 'INV-2026-9001',
            'status' => 'pending',
            'subtotal' => 100.00,
            'tax_amount' => 20.00,
            'discount_amount' => 0,
            'total' => 120.00,
            'amount_paid' => 0,
            'amount_due' => 120.00,
            'currency' => 'GBP',
            'issue_date' => now(),
            'due_date' => now()->addDays(14),
        ]);
    });

    describe('status helpers', function () {
        it('identifies pending invoices', function () {
            expect($this->invoice->isPending())->toBeTrue()
                ->and($this->invoice->isPaid())->toBeFalse()
                ->and($this->invoice->isVoid())->toBeFalse();
        });

        it('identifies paid invoices', function () {
            $this->invoice->update(['status' => 'paid']);

            expect($this->invoice->isPaid())->toBeTrue()
                ->and($this->invoice->isPending())->toBeFalse();
        });

        it('identifies void invoices', function () {
            $this->invoice->update(['status' => 'void']);

            expect($this->invoice->isVoid())->toBeTrue()
                ->and($this->invoice->isPending())->toBeFalse();
        });

        it('identifies overdue invoices by status', function () {
            $this->invoice->update(['status' => 'overdue']);

            expect($this->invoice->isOverdue())->toBeTrue();
        });

        it('identifies overdue invoices by past due date', function () {
            $this->invoice->update(['due_date' => now()->subDays(1)]);

            expect($this->invoice->isOverdue())->toBeTrue();
        });

        it('identifies sent invoices', function () {
            $this->invoice->update(['status' => 'sent']);

            expect($this->invoice->isSent())->toBeTrue()
                ->and($this->invoice->isPending())->toBeTrue(); // sent is considered pending
        });

        it('identifies draft invoices', function () {
            $this->invoice->update(['status' => 'draft']);

            expect($this->invoice->isDraft())->toBeTrue()
                ->and($this->invoice->isPending())->toBeTrue(); // draft is considered pending
        });
    });

    describe('actions', function () {
        it('marks invoice as paid with payment', function () {
            $payment = Payment::create([
                'workspace_id' => $this->workspace->id,
                'gateway' => 'stripe',
                'gateway_payment_id' => 'pi_model_test',
                'amount' => 120.00,
                'fee' => 3.00,
                'net_amount' => 117.00,
                'refunded_amount' => 0,
                'currency' => 'GBP',
                'status' => 'succeeded',
                'paid_at' => now(),
            ]);

            $this->invoice->markAsPaid($payment);

            expect($this->invoice->status)->toBe('paid')
                ->and($this->invoice->payment_id)->toBe($payment->id)
                ->and((float) $this->invoice->amount_paid)->toBe(120.00)
                ->and((float) $this->invoice->amount_due)->toBe(0.00)
                ->and($this->invoice->paid_at)->not->toBeNull();
        });

        it('marks invoice as void', function () {
            $this->invoice->markAsVoid();

            expect($this->invoice->status)->toBe('void');
        });

        it('marks invoice as sent', function () {
            $this->invoice->send();

            expect($this->invoice->status)->toBe('sent');
        });
    });

    describe('scopes', function () {
        it('scopes to paid invoices', function () {
            $this->invoice->update(['status' => 'paid']);

            Invoice::create([
                'workspace_id' => $this->workspace->id,
                'invoice_number' => 'INV-2026-9002',
                'status' => 'pending',
                'subtotal' => 50.00,
                'tax_amount' => 0,
                'discount_amount' => 0,
                'total' => 50.00,
                'amount_paid' => 0,
                'amount_due' => 50.00,
                'currency' => 'GBP',
                'issue_date' => now(),
                'due_date' => now()->addDays(14),
            ]);

            $paid = Invoice::paid()->get();

            expect($paid)->toHaveCount(1)
                ->and($paid->first()->id)->toBe($this->invoice->id);
        });

        it('scopes to unpaid invoices', function () {
            Invoice::create([
                'workspace_id' => $this->workspace->id,
                'invoice_number' => 'INV-2026-9003',
                'status' => 'paid',
                'subtotal' => 50.00,
                'tax_amount' => 0,
                'discount_amount' => 0,
                'total' => 50.00,
                'amount_paid' => 50.00,
                'amount_due' => 0,
                'currency' => 'GBP',
                'issue_date' => now(),
                'due_date' => now()->addDays(14),
            ]);

            $unpaid = Invoice::unpaid()->get();

            expect($unpaid)->toHaveCount(1)
                ->and($unpaid->first()->id)->toBe($this->invoice->id);
        });

        it('scopes to workspace invoices', function () {
            $otherWorkspace = Workspace::factory()->create();

            Invoice::create([
                'workspace_id' => $otherWorkspace->id,
                'invoice_number' => 'INV-2026-9004',
                'status' => 'pending',
                'subtotal' => 50.00,
                'tax_amount' => 0,
                'discount_amount' => 0,
                'total' => 50.00,
                'amount_paid' => 0,
                'amount_due' => 50.00,
                'currency' => 'GBP',
                'issue_date' => now(),
                'due_date' => now()->addDays(14),
            ]);

            $workspaceInvoices = Invoice::forWorkspace($this->workspace->id)->get();

            expect($workspaceInvoices)->toHaveCount(1)
                ->and($workspaceInvoices->first()->id)->toBe($this->invoice->id);
        });
    });

    describe('invoice number generation', function () {
        it('generates invoice numbers with correct format', function () {
            $number = Invoice::generateInvoiceNumber();
            $year = now()->format('Y');

            expect($number)->toMatch("/^INV-{$year}-\\d{4}$/");
        });

        it('increments invoice numbers sequentially', function () {
            $number1 = Invoice::generateInvoiceNumber();

            Invoice::create([
                'workspace_id' => $this->workspace->id,
                'invoice_number' => $number1,
                'status' => 'pending',
                'subtotal' => 10.00,
                'tax_amount' => 0,
                'discount_amount' => 0,
                'total' => 10.00,
                'amount_paid' => 0,
                'amount_due' => 10.00,
                'currency' => 'GBP',
                'issue_date' => now(),
                'due_date' => now()->addDays(14),
            ]);

            $number2 = Invoice::generateInvoiceNumber();

            $seq1 = (int) substr($number1, -4);
            $seq2 = (int) substr($number2, -4);

            expect($seq2)->toBe($seq1 + 1);
        });
    });

    describe('relationships', function () {
        it('belongs to a workspace', function () {
            expect($this->invoice->workspace)->toBeInstanceOf(Workspace::class)
                ->and($this->invoice->workspace->id)->toBe($this->workspace->id);
        });

        it('has many items', function () {
            InvoiceItem::create([
                'invoice_id' => $this->invoice->id,
                'description' => 'Line item 1',
                'quantity' => 1,
                'unit_price' => 60.00,
                'line_total' => 72.00,
                'tax_rate' => 20.00,
                'tax_amount' => 12.00,
            ]);

            InvoiceItem::create([
                'invoice_id' => $this->invoice->id,
                'description' => 'Line item 2',
                'quantity' => 2,
                'unit_price' => 20.00,
                'line_total' => 48.00,
                'tax_rate' => 20.00,
                'tax_amount' => 8.00,
            ]);

            expect($this->invoice->items)->toHaveCount(2);
        });

        it('belongs to an order', function () {
            $order = Order::create([
                'orderable_type' => Workspace::class,
                'orderable_id' => $this->workspace->id,
                'user_id' => $this->user->id,
                'order_number' => 'ORD-20260324-REL001',
                'status' => 'paid',
                'type' => 'subscription',
                'currency' => 'GBP',
                'subtotal' => 100.00,
                'tax_amount' => 20.00,
                'discount_amount' => 0,
                'total' => 120.00,
            ]);

            $this->invoice->update(['order_id' => $order->id]);
            $this->invoice->refresh();

            expect($this->invoice->order)->toBeInstanceOf(Order::class)
                ->and($this->invoice->order->id)->toBe($order->id);
        });

        it('belongs to a payment', function () {
            $payment = Payment::create([
                'workspace_id' => $this->workspace->id,
                'gateway' => 'stripe',
                'gateway_payment_id' => 'pi_rel_test',
                'amount' => 120.00,
                'fee' => 0,
                'net_amount' => 120.00,
                'refunded_amount' => 0,
                'currency' => 'GBP',
                'status' => 'succeeded',
            ]);

            $this->invoice->update(['payment_id' => $payment->id]);
            $this->invoice->refresh();

            expect($this->invoice->payment)->toBeInstanceOf(Payment::class)
                ->and($this->invoice->payment->id)->toBe($payment->id);
        });
    });

    describe('issued_at accessor', function () {
        it('returns issue_date as issued_at alias', function () {
            expect($this->invoice->issued_at)->not->toBeNull()
                ->and($this->invoice->issued_at->toDateString())
                ->toBe($this->invoice->issue_date->toDateString());
        });
    });
});

afterEach(function () {
    Mockery::close();
});