<?php

namespace Tests\Unit\Models;

use App\Models\Reservation;
use App\Models\SparePart;
use App\Models\SparePartOrder;
use App\Models\User;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\TestCase;

class SparePartOrderTest extends TestCase
{
    use RefreshDatabase;

    protected $seed = true;

    public function test_status_names_constant_exists(): void
    {
        $this->assertArrayHasKey(SparePartOrder::STATUS_ORDERED, SparePartOrder::STATUS_NAMES);
        $this->assertArrayHasKey(SparePartOrder::STATUS_IN_STOCK, SparePartOrder::STATUS_NAMES);
        $this->assertArrayHasKey(SparePartOrder::STATUS_SHIPPED, SparePartOrder::STATUS_NAMES);
    }

    public function test_status_name_attribute_returns_correct_name(): void
    {
        $order = SparePartOrder::factory()
            ->inStock()
            ->create();

        $this->assertEquals('На складе', $order->status_name);
    }

    public function test_available_qty_defaults_to_ordered_quantity_on_create(): void
    {
        $sparePart = SparePart::factory()->create();
        $user = User::factory()->create();

        $order = SparePartOrder::create([
            'spare_part_id' => $sparePart->id,
            'user_id' => $user->id,
            'ordered_quantity' => 15,
            'status' => SparePartOrder::STATUS_IN_STOCK,
            'with_documents' => false,
        ]);

        $this->assertEquals(15, $order->available_qty);
    }

    public function test_year_defaults_to_current_year_on_create(): void
    {
        $sparePart = SparePart::factory()->create();
        $user = User::factory()->create();

        $order = SparePartOrder::create([
            'spare_part_id' => $sparePart->id,
            'user_id' => $user->id,
            'ordered_quantity' => 10,
            'status' => SparePartOrder::STATUS_IN_STOCK,
            'with_documents' => false,
        ]);

        $this->assertEquals((int) date('Y'), $order->year);
    }

    public function test_reserved_qty_calculates_active_reservations(): void
    {
        $order = SparePartOrder::factory()
            ->inStock()
            ->withQuantity(20)
            ->create();

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

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

        // Cancelled should not count
        Reservation::factory()
            ->cancelled()
            ->withQuantity(10)
            ->fromOrder($order)
            ->create();

        $this->assertEquals(8, $order->reserved_qty);
    }

    public function test_free_qty_calculates_available_minus_reserved(): void
    {
        $order = SparePartOrder::factory()
            ->inStock()
            ->withQuantity(15)
            ->create();

        Reservation::factory()
            ->active()
            ->withQuantity(6)
            ->fromOrder($order)
            ->create();

        // available: 15, reserved: 6, free: 9
        $this->assertEquals(9, $order->free_qty);
    }

    public function test_free_qty_never_goes_negative(): void
    {
        $order = SparePartOrder::factory()
            ->inStock()
            ->withQuantity(5)
            ->create();

        // Create reservation larger than available (edge case)
        Reservation::factory()
            ->active()
            ->withQuantity(10)
            ->fromOrder($order)
            ->create();

        $this->assertEquals(0, $order->free_qty);
    }

    public function test_can_reserve_returns_true_when_sufficient_qty(): void
    {
        $order = SparePartOrder::factory()
            ->inStock()
            ->withQuantity(10)
            ->create();

        $this->assertTrue($order->canReserve(5));
        $this->assertTrue($order->canReserve(10));
    }

    public function test_can_reserve_returns_false_when_insufficient_qty(): void
    {
        $order = SparePartOrder::factory()
            ->inStock()
            ->withQuantity(10)
            ->create();

        Reservation::factory()
            ->active()
            ->withQuantity(8)
            ->fromOrder($order)
            ->create();

        // Only 2 free, trying to reserve 5
        $this->assertFalse($order->canReserve(5));
    }

    public function test_is_in_stock_method(): void
    {
        $orderInStock = SparePartOrder::factory()->inStock()->create();
        $orderOrdered = SparePartOrder::factory()->ordered()->create();

        $this->assertTrue($orderInStock->isInStock());
        $this->assertFalse($orderOrdered->isInStock());
    }

    public function test_is_ordered_method(): void
    {
        $orderOrdered = SparePartOrder::factory()->ordered()->create();
        $orderInStock = SparePartOrder::factory()->inStock()->create();

        $this->assertTrue($orderOrdered->isOrdered());
        $this->assertFalse($orderInStock->isOrdered());
    }

    public function test_is_shipped_method(): void
    {
        $orderShipped = SparePartOrder::factory()->shipped()->create();
        $orderInStock = SparePartOrder::factory()->inStock()->create();

        $this->assertTrue($orderShipped->isShipped());
        $this->assertFalse($orderInStock->isShipped());
    }

    public function test_scope_in_stock(): void
    {
        SparePartOrder::factory()->inStock()->create();
        SparePartOrder::factory()->inStock()->create();
        SparePartOrder::factory()->ordered()->create();
        SparePartOrder::factory()->shipped()->create();

        $inStockOrders = SparePartOrder::inStock()->get();

        $this->assertCount(2, $inStockOrders);
    }

    public function test_scope_with_available(): void
    {
        SparePartOrder::factory()->inStock()->withQuantity(10)->create();
        SparePartOrder::factory()->shipped()->create(); // available_qty = 0

        $withAvailable = SparePartOrder::withAvailable()->get();

        $this->assertCount(1, $withAvailable);
    }

    public function test_scope_with_documents(): void
    {
        SparePartOrder::factory()->withDocuments(true)->create();
        SparePartOrder::factory()->withDocuments(true)->create();
        SparePartOrder::factory()->withDocuments(false)->create();

        $withDocs = SparePartOrder::withDocuments(true)->get();
        $withoutDocs = SparePartOrder::withDocuments(false)->get();

        $this->assertCount(2, $withDocs);
        $this->assertCount(1, $withoutDocs);
    }

    public function test_scope_for_spare_part(): void
    {
        $sparePart1 = SparePart::factory()->create();
        $sparePart2 = SparePart::factory()->create();

        SparePartOrder::factory()->forSparePart($sparePart1)->create();
        SparePartOrder::factory()->forSparePart($sparePart1)->create();
        SparePartOrder::factory()->forSparePart($sparePart2)->create();

        $ordersForPart1 = SparePartOrder::forSparePart($sparePart1->id)->get();

        $this->assertCount(2, $ordersForPart1);
    }

    public function test_scope_available_for_reservation(): void
    {
        $sparePart = SparePart::factory()->create();

        $availableOrder = SparePartOrder::factory()
            ->inStock()
            ->withDocuments(false)
            ->withQuantity(10)
            ->forSparePart($sparePart)
            ->create(['created_at' => now()->subDay()]);

        // Not matching conditions
        SparePartOrder::factory()
            ->ordered() // wrong status
            ->withDocuments(false)
            ->forSparePart($sparePart)
            ->create();

        SparePartOrder::factory()
            ->inStock()
            ->withDocuments(true) // wrong docs type
            ->forSparePart($sparePart)
            ->create();

        SparePartOrder::factory()
            ->shipped() // no available qty
            ->withDocuments(false)
            ->forSparePart($sparePart)
            ->create();

        $available = SparePartOrder::availableForReservation($sparePart->id, false)->get();

        $this->assertCount(1, $available);
        $this->assertEquals($availableOrder->id, $available->first()->id);
    }

    public function test_casts_are_correct(): void
    {
        $order = SparePartOrder::factory()
            ->withDocuments(true)
            ->withQuantity(10)
            ->create();

        $order->refresh();

        $this->assertIsBool($order->with_documents);
        $this->assertIsInt($order->ordered_quantity);
        $this->assertIsInt($order->available_qty);
        $this->assertIsInt($order->year);
    }

    public function test_remaining_quantity_backward_compatibility(): void
    {
        $order = SparePartOrder::factory()
            ->withQuantity(15)
            ->create();

        // Deprecated attribute should still work
        $this->assertEquals($order->available_qty, $order->remaining_quantity);
    }

    public function test_relations_exist(): void
    {
        $order = SparePartOrder::factory()->create();

        $this->assertInstanceOf(\Illuminate\Database\Eloquent\Relations\BelongsTo::class, $order->sparePart());
        $this->assertInstanceOf(\Illuminate\Database\Eloquent\Relations\BelongsTo::class, $order->user());
        $this->assertInstanceOf(\Illuminate\Database\Eloquent\Relations\HasMany::class, $order->reservations());
        $this->assertInstanceOf(\Illuminate\Database\Eloquent\Relations\HasMany::class, $order->movements());
    }
}