<?php

namespace Tests\Feature\Validation;

use App\Models\Issue;
use App\Models\IssueComment;
use App\Models\IssueLabel;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\TestCase;
use Tests\Traits\SeedsRolesAndPermissions;

/**
 * Issue Validation Tests
 *
 * Tests validation rules and model behavior for issue tracking functionality.
 */
class IssueValidationTest extends TestCase
{
    use RefreshDatabase, SeedsRolesAndPermissions;

    protected function setUp(): void
    {
        parent::setUp();
        $this->seedRolesAndPermissions();
    }

    public function test_issue_number_is_generated(): void
    {
        $admin = $this->createAdmin();
        $issue = Issue::factory()->create(['created_by_user_id' => $admin->id]);

        $this->assertNotEmpty($issue->issue_number);
        $this->assertMatchesRegularExpression('/^ISS-\d{4}-\d+$/', $issue->issue_number);
    }

    public function test_issue_defaults_to_new_status(): void
    {
        $admin = $this->createAdmin();
        $issue = Issue::factory()->create(['created_by_user_id' => $admin->id]);

        $this->assertEquals(Issue::STATUS_NEW, $issue->status);
    }

    public function test_issue_can_have_assignee(): void
    {
        $admin = $this->createAdmin();
        $assignee = $this->createAdmin();

        $issue = Issue::factory()->create([
            'created_by_user_id' => $admin->id,
            'assigned_to_user_id' => $assignee->id,
        ]);

        $this->assertEquals($assignee->id, $issue->assigned_to_user_id);
        $this->assertEquals($assignee->id, $issue->assignee->id);
    }

    public function test_issue_can_have_due_date(): void
    {
        $admin = $this->createAdmin();
        $dueDate = now()->addWeek();

        $issue = Issue::factory()->create([
            'created_by_user_id' => $admin->id,
            'due_date' => $dueDate,
        ]);

        $this->assertTrue($issue->due_date->isSameDay($dueDate));
    }

    public function test_issue_can_have_parent(): void
    {
        $admin = $this->createAdmin();

        $parentIssue = Issue::factory()->create(['created_by_user_id' => $admin->id]);
        $childIssue = Issue::factory()->create([
            'created_by_user_id' => $admin->id,
            'parent_issue_id' => $parentIssue->id,
        ]);

        $this->assertEquals($parentIssue->id, $childIssue->parent_issue_id);
        $this->assertEquals($parentIssue->id, $childIssue->parentIssue->id);
    }

    public function test_issue_can_have_subtasks(): void
    {
        $admin = $this->createAdmin();

        $parentIssue = Issue::factory()->create(['created_by_user_id' => $admin->id]);

        Issue::factory()->count(3)->create([
            'created_by_user_id' => $admin->id,
            'parent_issue_id' => $parentIssue->id,
        ]);

        $this->assertCount(3, $parentIssue->subTasks);
    }

    public function test_issue_can_have_comments(): void
    {
        $admin = $this->createAdmin();
        $issue = Issue::factory()->create(['created_by_user_id' => $admin->id]);

        IssueComment::factory()->count(5)->create([
            'issue_id' => $issue->id,
            'user_id' => $admin->id,
        ]);

        $this->assertCount(5, $issue->comments);
    }

    public function test_issue_can_have_labels(): void
    {
        $admin = $this->createAdmin();
        $issue = Issue::factory()->create(['created_by_user_id' => $admin->id]);
        $labels = IssueLabel::factory()->count(3)->create();

        $issue->labels()->attach($labels->pluck('id'));

        $this->assertCount(3, $issue->labels);
    }

    public function test_issue_status_constants(): void
    {
        $this->assertEquals('new', Issue::STATUS_NEW);
        $this->assertEquals('in_progress', Issue::STATUS_IN_PROGRESS);
        $this->assertEquals('closed', Issue::STATUS_CLOSED);
    }

    public function test_issue_priority_constants(): void
    {
        $this->assertEquals('low', Issue::PRIORITY_LOW);
        $this->assertEquals('medium', Issue::PRIORITY_MEDIUM);
        $this->assertEquals('high', Issue::PRIORITY_HIGH);
        $this->assertEquals('urgent', Issue::PRIORITY_URGENT);
    }

    public function test_issue_type_constants(): void
    {
        $this->assertEquals('work_item', Issue::TYPE_WORK_ITEM);
        $this->assertEquals('project_task', Issue::TYPE_PROJECT_TASK);
        $this->assertEquals('maintenance', Issue::TYPE_MAINTENANCE);
        $this->assertEquals('member_request', Issue::TYPE_MEMBER_REQUEST);
    }
}