<?php

namespace Tests\Unit\Services;

use App\Models\InventoryMovement;
use App\Models\Reclamation;
use App\Models\Reservation;
use App\Models\SparePart;
use App\Models\SparePartOrder;
use App\Models\User;
use App\Services\IssueResult;
use App\Services\SparePartIssueService;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\TestCase;

class SparePartIssueServiceTest extends TestCase
{
    use RefreshDatabase;

    protected $seed = true;

    private SparePartIssueService $service;

    protected function setUp(): void
    {
        parent::setUp();
        $this->service = new SparePartIssueService();
    }

    // ==================== issueReservation ====================

    public function test_issue_reservation_decreases_available_qty(): void
    {
        // Arrange
        $user = User::factory()->create();
        $this->actingAs($user);

        $sparePart = SparePart::factory()->create();
        $reclamation = Reclamation::factory()->create();
        $order = SparePartOrder::factory()
            ->inStock()
            ->withDocuments(false)
            ->withQuantity(10)
            ->forSparePart($sparePart)
            ->create();

        $reservation = Reservation::factory()
            ->active()
            ->withQuantity(3)
            ->withDocuments(false)
            ->fromOrder($order)
            ->forReclamation($reclamation)
            ->create();

        // Act
        $result = $this->service->issueReservation($reservation);

        // Assert
        $this->assertInstanceOf(IssueResult::class, $result);
        $this->assertEquals(3, $result->issued);

        $order->refresh();
        $this->assertEquals(7, $order->available_qty);
    }

    public function test_issue_reservation_marks_reservation_as_issued(): void
    {
        // Arrange
        $user = User::factory()->create();
        $this->actingAs($user);

        $sparePart = SparePart::factory()->create();
        $reclamation = Reclamation::factory()->create();
        $order = SparePartOrder::factory()
            ->inStock()
            ->withQuantity(10)
            ->forSparePart($sparePart)
            ->create();

        $reservation = Reservation::factory()
            ->active()
            ->withQuantity(5)
            ->fromOrder($order)
            ->forReclamation($reclamation)
            ->create();

        // Act
        $this->service->issueReservation($reservation);

        // Assert
        $reservation->refresh();
        $this->assertEquals(Reservation::STATUS_ISSUED, $reservation->status);
        $this->assertTrue($reservation->isIssued());
    }

    public function test_issue_reservation_creates_inventory_movement(): void
    {
        // Arrange
        $user = User::factory()->create();
        $this->actingAs($user);

        $sparePart = SparePart::factory()->create();
        $reclamation = Reclamation::factory()->create();
        $order = SparePartOrder::factory()
            ->inStock()
            ->withDocuments(true)
            ->withQuantity(10)
            ->forSparePart($sparePart)
            ->create();

        $reservation = Reservation::factory()
            ->active()
            ->withQuantity(4)
            ->withDocuments(true)
            ->fromOrder($order)
            ->forReclamation($reclamation)
            ->create();

        // Act
        $result = $this->service->issueReservation($reservation, 'Тестовое примечание');

        // Assert
        $this->assertDatabaseHas('inventory_movements', [
            'spare_part_id' => $sparePart->id,
            'spare_part_order_id' => $order->id,
            'qty' => 4,
            'movement_type' => InventoryMovement::TYPE_ISSUE,
            'source_type' => InventoryMovement::SOURCE_RECLAMATION,
            'source_id' => $reclamation->id,
            'with_documents' => true,
            'user_id' => $user->id,
        ]);

        $this->assertNotNull($result->movement);
        $this->assertEquals(InventoryMovement::TYPE_ISSUE, $result->movement->movement_type);
    }

    public function test_issue_reservation_changes_order_status_to_shipped_when_empty(): void
    {
        // Arrange
        $user = User::factory()->create();
        $this->actingAs($user);

        $sparePart = SparePart::factory()->create();
        $reclamation = Reclamation::factory()->create();
        $order = SparePartOrder::factory()
            ->inStock()
            ->withQuantity(5)
            ->forSparePart($sparePart)
            ->create();

        $reservation = Reservation::factory()
            ->active()
            ->withQuantity(5)
            ->fromOrder($order)
            ->forReclamation($reclamation)
            ->create();

        // Act
        $this->service->issueReservation($reservation);

        // Assert
        $order->refresh();
        $this->assertEquals(0, $order->available_qty);
        $this->assertEquals(SparePartOrder::STATUS_SHIPPED, $order->status);
    }

    public function test_issue_reservation_throws_exception_for_non_active_reservation(): void
    {
        // Arrange
        $sparePart = SparePart::factory()->create();
        $reclamation = Reclamation::factory()->create();
        $order = SparePartOrder::factory()
            ->inStock()
            ->forSparePart($sparePart)
            ->create();

        $reservation = Reservation::factory()
            ->cancelled()
            ->fromOrder($order)
            ->forReclamation($reclamation)
            ->create();

        // Assert
        $this->expectException(\InvalidArgumentException::class);
        $this->expectExceptionMessage('Резерв не активен');

        // Act
        $this->service->issueReservation($reservation);
    }

    public function test_issue_reservation_throws_exception_when_insufficient_stock(): void
    {
        // Arrange
        $user = User::factory()->create();
        $this->actingAs($user);

        $sparePart = SparePart::factory()->create();
        $reclamation = Reclamation::factory()->create();
        $order = SparePartOrder::factory()
            ->inStock()
            ->withQuantity(2)
            ->forSparePart($sparePart)
            ->create();

        // Create reservation with more qty than available
        $reservation = Reservation::factory()
            ->active()
            ->withQuantity(5)
            ->fromOrder($order)
            ->forReclamation($reclamation)
            ->create();

        // Manually reduce available_qty to simulate inconsistency
        $order->update(['available_qty' => 2]);

        // Assert
        $this->expectException(\RuntimeException::class);
        $this->expectExceptionMessage('Недостаточно товара в партии');

        // Act
        $this->service->issueReservation($reservation);
    }

    // ==================== issueForReclamation ====================

    public function test_issue_for_reclamation_issues_all_active_reservations(): void
    {
        // Arrange
        $user = User::factory()->create();
        $this->actingAs($user);

        $sparePart = SparePart::factory()->create();
        $reclamation = Reclamation::factory()->create();
        $order = SparePartOrder::factory()
            ->inStock()
            ->withQuantity(20)
            ->forSparePart($sparePart)
            ->create();

        Reservation::factory()
            ->active()
            ->withQuantity(3)
            ->fromOrder($order)
            ->forReclamation($reclamation)
            ->create();

        Reservation::factory()
            ->active()
            ->withQuantity(5)
            ->fromOrder($order)
            ->forReclamation($reclamation)
            ->create();

        // Act
        $results = $this->service->issueForReclamation($reclamation->id);

        // Assert
        $this->assertCount(2, $results);
        $this->assertEquals(3 + 5, array_sum(array_map(fn($r) => $r->issued, $results)));

        $order->refresh();
        $this->assertEquals(20 - 8, $order->available_qty);
    }

    public function test_issue_for_reclamation_filters_by_spare_part(): void
    {
        // Arrange
        $user = User::factory()->create();
        $this->actingAs($user);

        $sparePart1 = SparePart::factory()->create();
        $sparePart2 = SparePart::factory()->create();
        $reclamation = Reclamation::factory()->create();

        $order1 = SparePartOrder::factory()
            ->inStock()
            ->withQuantity(10)
            ->forSparePart($sparePart1)
            ->create();

        $order2 = SparePartOrder::factory()
            ->inStock()
            ->withQuantity(10)
            ->forSparePart($sparePart2)
            ->create();

        Reservation::factory()
            ->active()
            ->withQuantity(3)
            ->fromOrder($order1)
            ->forReclamation($reclamation)
            ->create();

        Reservation::factory()
            ->active()
            ->withQuantity(5)
            ->fromOrder($order2)
            ->forReclamation($reclamation)
            ->create();

        // Act - issue only for sparePart1
        $results = $this->service->issueForReclamation(
            $reclamation->id,
            sparePartId: $sparePart1->id
        );

        // Assert
        $this->assertCount(1, $results);
        $this->assertEquals(3, $results[0]->issued);

        // Check sparePart2 reservation is still active
        $this->assertDatabaseHas('reservations', [
            'spare_part_id' => $sparePart2->id,
            'reclamation_id' => $reclamation->id,
            'status' => Reservation::STATUS_ACTIVE,
        ]);
    }

    public function test_issue_for_reclamation_filters_by_with_documents(): void
    {
        // Arrange
        $user = User::factory()->create();
        $this->actingAs($user);

        $sparePart = SparePart::factory()->create();
        $reclamation = Reclamation::factory()->create();

        $orderWithDocs = SparePartOrder::factory()
            ->inStock()
            ->withDocuments(true)
            ->withQuantity(10)
            ->forSparePart($sparePart)
            ->create();

        $orderWithoutDocs = SparePartOrder::factory()
            ->inStock()
            ->withDocuments(false)
            ->withQuantity(10)
            ->forSparePart($sparePart)
            ->create();

        Reservation::factory()
            ->active()
            ->withQuantity(3)
            ->withDocuments(true)
            ->fromOrder($orderWithDocs)
            ->forReclamation($reclamation)
            ->create();

        Reservation::factory()
            ->active()
            ->withQuantity(5)
            ->withDocuments(false)
            ->fromOrder($orderWithoutDocs)
            ->forReclamation($reclamation)
            ->create();

        // Act - issue only with documents
        $results = $this->service->issueForReclamation(
            $reclamation->id,
            withDocuments: true
        );

        // Assert
        $this->assertCount(1, $results);
        $this->assertEquals(3, $results[0]->issued);
    }

    // ==================== directIssue ====================

    public function test_direct_issue_decreases_available_qty(): void
    {
        // Arrange
        $user = User::factory()->create();
        $this->actingAs($user);

        $sparePart = SparePart::factory()->create();
        $order = SparePartOrder::factory()
            ->inStock()
            ->withQuantity(10)
            ->forSparePart($sparePart)
            ->create();

        // Act
        $result = $this->service->directIssue($order, 4, 'Ручное списание');

        // Assert
        $this->assertEquals(4, $result->issued);
        $this->assertNull($result->reservation);

        $order->refresh();
        $this->assertEquals(6, $order->available_qty);
    }

    public function test_direct_issue_creates_manual_movement(): void
    {
        // Arrange
        $user = User::factory()->create();
        $this->actingAs($user);

        $sparePart = SparePart::factory()->create();
        $order = SparePartOrder::factory()
            ->inStock()
            ->withDocuments(true)
            ->withQuantity(10)
            ->forSparePart($sparePart)
            ->create();

        // Act
        $result = $this->service->directIssue($order, 3, 'Тестовое списание');

        // Assert
        $this->assertDatabaseHas('inventory_movements', [
            'spare_part_id' => $sparePart->id,
            'spare_part_order_id' => $order->id,
            'qty' => 3,
            'movement_type' => InventoryMovement::TYPE_ISSUE,
            'source_type' => InventoryMovement::SOURCE_MANUAL,
            'source_id' => null,
            'with_documents' => true,
            'note' => 'Тестовое списание',
        ]);
    }

    public function test_direct_issue_throws_exception_when_insufficient_stock(): void
    {
        // Arrange
        $sparePart = SparePart::factory()->create();
        $order = SparePartOrder::factory()
            ->inStock()
            ->withQuantity(5)
            ->forSparePart($sparePart)
            ->create();

        // Assert
        $this->expectException(\InvalidArgumentException::class);
        $this->expectExceptionMessage('Недостаточно товара в партии');

        // Act
        $this->service->directIssue($order, 10, 'Попытка списать больше');
    }

    public function test_direct_issue_changes_status_to_shipped_when_empty(): void
    {
        // Arrange
        $user = User::factory()->create();
        $this->actingAs($user);

        $sparePart = SparePart::factory()->create();
        $order = SparePartOrder::factory()
            ->inStock()
            ->withQuantity(5)
            ->forSparePart($sparePart)
            ->create();

        // Act
        $this->service->directIssue($order, 5, 'Полное списание');

        // Assert
        $order->refresh();
        $this->assertEquals(0, $order->available_qty);
        $this->assertEquals(SparePartOrder::STATUS_SHIPPED, $order->status);
    }

    // ==================== correctInventory ====================

    public function test_correct_inventory_increases_quantity(): void
    {
        // Arrange
        $user = User::factory()->create();
        $this->actingAs($user);

        $sparePart = SparePart::factory()->create();
        $order = SparePartOrder::factory()
            ->inStock()
            ->withQuantity(10)
            ->forSparePart($sparePart)
            ->create();

        // Act
        $movement = $this->service->correctInventory($order, 15, 'Найдено при инвентаризации');

        // Assert
        $order->refresh();
        $this->assertEquals(15, $order->available_qty);
        $this->assertEquals(InventoryMovement::TYPE_CORRECTION_PLUS, $movement->movement_type);
        $this->assertEquals(5, $movement->qty);
    }

    public function test_correct_inventory_decreases_quantity(): void
    {
        // Arrange
        $user = User::factory()->create();
        $this->actingAs($user);

        $sparePart = SparePart::factory()->create();
        $order = SparePartOrder::factory()
            ->inStock()
            ->withQuantity(10)
            ->forSparePart($sparePart)
            ->create();

        // Act
        $movement = $this->service->correctInventory($order, 7, 'Недостача');

        // Assert
        $order->refresh();
        $this->assertEquals(7, $order->available_qty);
        $this->assertEquals(InventoryMovement::TYPE_CORRECTION_MINUS, $movement->movement_type);
        $this->assertEquals(3, $movement->qty);
    }

    public function test_correct_inventory_creates_movement_with_inventory_source(): void
    {
        // Arrange
        $user = User::factory()->create();
        $this->actingAs($user);

        $sparePart = SparePart::factory()->create();
        $order = SparePartOrder::factory()
            ->inStock()
            ->withDocuments(false)
            ->withQuantity(10)
            ->forSparePart($sparePart)
            ->create();

        // Act
        $this->service->correctInventory($order, 12, 'Коррекция');

        // Assert
        $this->assertDatabaseHas('inventory_movements', [
            'spare_part_id' => $sparePart->id,
            'spare_part_order_id' => $order->id,
            'qty' => 2,
            'movement_type' => InventoryMovement::TYPE_CORRECTION_PLUS,
            'source_type' => InventoryMovement::SOURCE_INVENTORY,
            'with_documents' => false,
            'note' => 'Коррекция',
        ]);
    }

    public function test_correct_inventory_changes_status_to_shipped_when_zero(): void
    {
        // Arrange
        $user = User::factory()->create();
        $this->actingAs($user);

        $sparePart = SparePart::factory()->create();
        $order = SparePartOrder::factory()
            ->inStock()
            ->withQuantity(5)
            ->forSparePart($sparePart)
            ->create();

        // Act
        $this->service->correctInventory($order, 0, 'Списано всё');

        // Assert
        $order->refresh();
        $this->assertEquals(0, $order->available_qty);
        $this->assertEquals(SparePartOrder::STATUS_SHIPPED, $order->status);
    }

    public function test_correct_inventory_restores_status_to_in_stock_from_shipped(): void
    {
        // Arrange
        $user = User::factory()->create();
        $this->actingAs($user);

        $sparePart = SparePart::factory()->create();
        $order = SparePartOrder::factory()
            ->shipped()
            ->forSparePart($sparePart)
            ->create();

        // Act
        $this->service->correctInventory($order, 5, 'Найдено на складе');

        // Assert
        $order->refresh();
        $this->assertEquals(5, $order->available_qty);
        $this->assertEquals(SparePartOrder::STATUS_IN_STOCK, $order->status);
    }

    public function test_correct_inventory_throws_exception_for_negative_quantity(): void
    {
        // Arrange
        $sparePart = SparePart::factory()->create();
        $order = SparePartOrder::factory()
            ->inStock()
            ->withQuantity(5)
            ->forSparePart($sparePart)
            ->create();

        // Assert
        $this->expectException(\InvalidArgumentException::class);
        $this->expectExceptionMessage('Остаток не может быть отрицательным');

        // Act
        $this->service->correctInventory($order, -1, 'Отрицательный остаток');
    }

    public function test_correct_inventory_throws_exception_when_quantity_unchanged(): void
    {
        // Arrange
        $sparePart = SparePart::factory()->create();
        $order = SparePartOrder::factory()
            ->inStock()
            ->withQuantity(10)
            ->forSparePart($sparePart)
            ->create();

        // Assert
        $this->expectException(\InvalidArgumentException::class);
        $this->expectExceptionMessage('Количество не изменилось');

        // Act
        $this->service->correctInventory($order, 10, 'Без изменений');
    }
}