<?php

namespace Tests\Feature\EdgeCases;

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

/**
 * Issue Edge Cases Tests
 *
 * Tests boundary values and edge cases for issue tracking operations.
 */
class IssueEdgeCasesTest extends TestCase
{
    use RefreshDatabase, SeedsRolesAndPermissions;

    protected User $admin;

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

    /**
     * Test issue due date today
     */
    public function test_issue_due_date_today(): void
    {
        $issue = Issue::factory()->create([
            'created_by_user_id' => $this->admin->id,
            'due_date' => now()->endOfDay(),
        ]);

        $this->assertTrue($issue->due_date->isToday());
    }

    /**
     * Test issue due date in past
     */
    public function test_issue_due_date_in_past(): void
    {
        $issue = Issue::factory()->create([
            'created_by_user_id' => $this->admin->id,
            'due_date' => now()->subDay(),
            'status' => Issue::STATUS_IN_PROGRESS,
        ]);

        // Issue with past due date and not closed is overdue
        $this->assertTrue($issue->due_date->isPast());
        $this->assertNotEquals(Issue::STATUS_CLOSED, $issue->status);
    }

    /**
     * Test issue with no assignee
     */
    public function test_issue_with_no_assignee(): void
    {
        $issue = Issue::factory()->create([
            'created_by_user_id' => $this->admin->id,
            'assigned_to_user_id' => null,
        ]);

        $this->assertNull($issue->assigned_to_user_id);
        $this->assertNull($issue->assignee);
    }

    /**
     * Test issue with circular parent reference prevention
     */
    public function test_issue_with_circular_parent_reference(): void
    {
        $issue = Issue::factory()->create([
            'created_by_user_id' => $this->admin->id,
        ]);

        // Try to set parent to self via update
        $response = $this->withoutMiddleware(VerifyCsrfToken::class)
            ->actingAs($this->admin)
            ->patch(
                route('admin.issues.update', $issue),
                [
                    'title' => $issue->title,
                    'parent_issue_id' => $issue->id,
                ]
            );

        // Should either have errors or redirect with preserved state
        $issue->refresh();
        $this->assertNotEquals($issue->id, $issue->parent_issue_id);
    }

    /**
     * Test issue with many subtasks
     */
    public function test_issue_with_many_subtasks(): void
    {
        $parentIssue = Issue::factory()->create([
            'created_by_user_id' => $this->admin->id,
        ]);

        // Create 10 subtasks
        for ($i = 0; $i < 10; $i++) {
            Issue::factory()->create([
                'created_by_user_id' => $this->admin->id,
                'parent_issue_id' => $parentIssue->id,
            ]);
        }

        $this->assertCount(10, $parentIssue->subTasks);
    }

    /**
     * Test issue with many comments
     */
    public function test_issue_with_many_comments(): void
    {
        $issue = Issue::factory()->create([
            'created_by_user_id' => $this->admin->id,
        ]);

        // Create 50 comments
        for ($i = 0; $i < 50; $i++) {
            IssueComment::factory()->create([
                'issue_id' => $issue->id,
                'user_id' => $this->admin->id,
            ]);
        }

        $this->assertCount(50, $issue->comments);
    }

    /**
     * Test issue time log with positive hours
     */
    public function test_issue_time_log_positive_hours(): void
    {
        $issue = Issue::factory()->create([
            'created_by_user_id' => $this->admin->id,
        ]);

        // Create time log directly via model
        $timeLog = \App\Models\IssueTimeLog::create([
            'issue_id' => $issue->id,
            'user_id' => $this->admin->id,
            'hours' => 2.5,
            'description' => 'Work done',
            'logged_at' => now(),
        ]);

        $this->assertDatabaseHas('issue_time_logs', [
            'issue_id' => $issue->id,
            'hours' => 2.5,
        ]);

        $this->assertEquals(2.5, $timeLog->hours);
    }

    /**
     * Test issue status transition from closed
     */
    public function test_issue_status_transition_from_closed(): void
    {
        $issue = Issue::factory()->create([
            'created_by_user_id' => $this->admin->id,
            'status' => Issue::STATUS_CLOSED,
        ]);

        // Reopen the issue
        $response = $this->withoutMiddleware(VerifyCsrfToken::class)
            ->actingAs($this->admin)
            ->patch(
                route('admin.issues.update-status', $issue),
                ['status' => Issue::STATUS_IN_PROGRESS]
            );

        $issue->refresh();

        // Depending on business rules, reopening might be allowed
        $this->assertTrue(
            $issue->status === Issue::STATUS_CLOSED ||
            $issue->status === Issue::STATUS_IN_PROGRESS
        );
    }

    /**
     * Test issue with maximum labels
     */
    public function test_issue_with_maximum_labels(): void
    {
        $issue = Issue::factory()->create([
            'created_by_user_id' => $this->admin->id,
        ]);

        // Create and attach many labels
        $labels = IssueLabel::factory()->count(20)->create();
        $issue->labels()->attach($labels->pluck('id'));

        $this->assertCount(20, $issue->labels);
    }

    /**
     * Test issue number generation across years
     */
    public function test_issue_number_generation_across_years(): void
    {
        // Create issue in current year
        $issue1 = Issue::factory()->create([
            'created_by_user_id' => $this->admin->id,
        ]);

        $currentYear = now()->year;

        // Issue number should contain year
        $this->assertStringContainsString((string) $currentYear, $issue1->issue_number);
    }
}