<?php

namespace Tests\Unit;

use App\Models\Trip;
use App\Models\User;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\TestCase;

class TripTest extends TestCase
{
    use RefreshDatabase;

    /**
     * Test trip creation with factory.
     */
    public function test_trip_can_be_created()
    {
        $user = User::factory()->create();
        $trip = Trip::factory()->create([
            'name' => 'Paris Adventure',
            'description' => 'A wonderful trip to Paris',
            'created_by_user_id' => $user->id,
        ]);

        $this->assertInstanceOf(Trip::class, $trip);
        $this->assertEquals('Paris Adventure', $trip->name);
        $this->assertEquals('A wonderful trip to Paris', $trip->description);
        $this->assertEquals($user->id, $trip->created_by_user_id);
        $this->assertNotNull($trip->id);
        $this->assertNotNull($trip->created_at);
        $this->assertNotNull($trip->updated_at);
    }

    /**
     * Test trip fillable attributes.
     */
    public function test_trip_fillable_attributes()
    {
        $user = User::factory()->create();
        $tripData = [
            'name' => 'Tokyo Trip',
            'description' => 'Exploring Japan',
            'start_date' => '2025-06-01',
            'end_date' => '2025-06-15',
            'created_by_user_id' => $user->id,
        ];

        $trip = Trip::create($tripData);

        $this->assertEquals('Tokyo Trip', $trip->name);
        $this->assertEquals('Exploring Japan', $trip->description);
        $this->assertEquals('2025-06-01', $trip->start_date->format('Y-m-d'));
        $this->assertEquals('2025-06-15', $trip->end_date->format('Y-m-d'));
        $this->assertEquals($user->id, $trip->created_by_user_id);
    }

    /**
     * Test trip date casting.
     */
    public function test_trip_date_casting()
    {
        $trip = Trip::factory()->create([
            'start_date' => '2025-07-01',
            'end_date' => '2025-07-10',
        ]);

        $this->assertInstanceOf(\Illuminate\Support\Carbon::class, $trip->start_date);
        $this->assertInstanceOf(\Illuminate\Support\Carbon::class, $trip->end_date);
        $this->assertEquals('2025-07-01', $trip->start_date->format('Y-m-d'));
        $this->assertEquals('2025-07-10', $trip->end_date->format('Y-m-d'));
    }

    /**
     * Test trip can have null dates.
     */
    public function test_trip_can_have_null_dates()
    {
        $trip = Trip::factory()->withoutDates()->create([
            'name' => 'Flexible Trip',
        ]);

        $this->assertNull($trip->start_date);
        $this->assertNull($trip->end_date);
        $this->assertEquals('Flexible Trip', $trip->name);
    }

    /**
     * Test trip belongs to user relationship.
     */
    public function test_trip_belongs_to_user()
    {
        $user = User::factory()->create(['name' => 'John Doe']);
        $trip = Trip::factory()->create([
            'created_by_user_id' => $user->id,
        ]);

        $this->assertInstanceOf(User::class, $trip->user);
        $this->assertEquals($user->id, $trip->user->id);
        $this->assertEquals('John Doe', $trip->user->name);
    }

    /**
     * Test trip factory creates valid trips.
     */
    public function test_trip_factory_creates_valid_trips()
    {
        $trip = Trip::factory()->create();

        $this->assertNotEmpty($trip->name);
        $this->assertNotNull($trip->created_by_user_id);
        $this->assertInstanceOf(User::class, $trip->user);
    }

    /**
     * Test trip factory upcoming state.
     */
    public function test_trip_factory_upcoming_state()
    {
        $trip = Trip::factory()->upcoming()->create();

        $this->assertNotNull($trip->start_date);
        $this->assertNotNull($trip->end_date);
        $this->assertTrue($trip->start_date->isFuture());
        $this->assertTrue($trip->end_date->isAfter($trip->start_date));
    }

    /**
     * Test trip factory past state.
     */
    public function test_trip_factory_past_state()
    {
        $trip = Trip::factory()->past()->create();

        $this->assertNotNull($trip->start_date);
        $this->assertNotNull($trip->end_date);
        $this->assertTrue($trip->start_date->isPast());
        $this->assertTrue($trip->end_date->isPast());
        $this->assertTrue($trip->end_date->isAfter($trip->start_date));
    }

    /**
     * Test trip model uses correct table.
     */
    public function test_trip_uses_correct_table()
    {
        $trip = new Trip();

        $this->assertEquals('trips', $trip->getTable());
    }

    /**
     * Test trip model has correct primary key.
     */
    public function test_trip_has_correct_primary_key()
    {
        $trip = new Trip();

        $this->assertEquals('id', $trip->getKeyName());
        $this->assertTrue($trip->getIncrementing());
    }

    /**
     * Test trip model uses timestamps.
     */
    public function test_trip_uses_timestamps()
    {
        $trip = new Trip();

        $this->assertTrue($trip->usesTimestamps());
    }

    /**
     * Test trip can be created with minimal data.
     */
    public function test_trip_can_be_created_with_minimal_data()
    {
        $user = User::factory()->create();
        $trip = Trip::create([
            'name' => 'Minimal Trip',
            'created_by_user_id' => $user->id,
        ]);

        $this->assertEquals('Minimal Trip', $trip->name);
        $this->assertNull($trip->description);
        $this->assertNull($trip->start_date);
        $this->assertNull($trip->end_date);
        $this->assertEquals($user->id, $trip->created_by_user_id);
    }

    /**
     * Test trip name is required.
     */
    public function test_trip_name_is_required()
    {
        $user = User::factory()->create();

        $this->expectException(\Illuminate\Database\QueryException::class);

        Trip::create([
            'description' => 'A trip without a name',
            'created_by_user_id' => $user->id,
        ]);
    }

    /**
     * Test trip requires a user.
     */
    public function test_trip_requires_user()
    {
        $this->expectException(\Illuminate\Database\QueryException::class);

        Trip::create([
            'name' => 'Orphaned Trip',
            'description' => 'A trip without a user',
        ]);
    }

    /**
     * Test trip dates can be formatted.
     */
    public function test_trip_dates_can_be_formatted()
    {
        $trip = Trip::factory()->create([
            'start_date' => '2025-12-25',
            'end_date' => '2025-12-31',
        ]);

        $this->assertEquals('2025-12-25', $trip->start_date->format('Y-m-d'));
        $this->assertEquals('2025-12-31', $trip->end_date->format('Y-m-d'));
        $this->assertEquals('December 25, 2025', $trip->start_date->format('F j, Y'));
        $this->assertEquals('December 31, 2025', $trip->end_date->format('F j, Y'));
    }

    /**
     * Test trip can calculate duration.
     */
    public function test_trip_can_calculate_duration()
    {
        $trip = Trip::factory()->create([
            'start_date' => '2025-06-01',
            'end_date' => '2025-06-07',
        ]);

        $duration = $trip->start_date->diffInDays($trip->end_date) + 1; // Include both start and end day
        $this->assertEquals(7, $duration);
    }
}