<?php

namespace Tests\Unit;

use App\Models\Interview;
use App\Models\User;
use App\Services\Interview\InterviewCalendarService;
use Carbon\Carbon;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\TestCase;

class InterviewCalendarServiceTest extends TestCase
{
    use RefreshDatabase;

    public function test_generates_standardized_event_title_matching_exact_pattern(): void
    {
        $service = new InterviewCalendarService;

        // Target example: Interview Invitation_R1_Soumyadeep Mondal_AIML (Computer Vision & Agentic AI) Engineer_11/8/2026_1700
        $scheduledAt = Carbon::create(2026, 8, 11, 17, 0, 0);

        $interview = new Interview([
            'candidate_name' => 'Soumyadeep Mondal',
            'candidate_email' => 'soumyadeep@example.com',
            'candidate_phone' => '9876543210',
            'job_title' => 'AIML (Computer Vision & Agentic AI) Engineer',
            'round' => 'R1',
            'scheduled_at' => $scheduledAt,
            'expires_at' => $scheduledAt->copy()->addHours(2),
            'submission_unique_id' => 'soumyadeep-mondal_9876543210_1752000000',
            'temp_password' => 'Pass-123456',
            'language' => 'python',
        ]);

        $this->assertEquals(
            'Interview Invitation_R1_Soumyadeep Mondal_AIML (Computer Vision & Agentic AI) Engineer_11/8/2026_1700',
            $interview->event_title
        );
    }

    public function test_ics_generation_includes_start_time_rsvp_15min_alert_and_matching_request_method(): void
    {
        $service = new InterviewCalendarService;

        $interviewer = User::create([
            'name' => 'Panelist Reviewer',
            'email' => 'panelist@company.com',
            'role' => 'user',
        ]);

        $scheduledAt = Carbon::create(2026, 8, 11, 17, 0, 0);

        $interview = Interview::create([
            'candidate_name' => 'Soumyadeep Mondal',
            'candidate_email' => 'soumyadeep@example.com',
            'candidate_phone' => '9876543210',
            'job_title' => 'AIML (Computer Vision & Agentic AI) Engineer',
            'round' => 'R1',
            'description' => 'Focus on PyTorch & OpenCV live coding',
            'scheduled_at' => $scheduledAt,
            'expires_at' => $scheduledAt->copy()->addHours(2),
            'submission_unique_id' => 'soumyadeep-mondal_9876543210_1752000001',
            'temp_password' => 'Pass-998877',
            'language' => 'python',
            'status' => 'scheduled',
            'assigned_interviewers' => [$interviewer->id],
        ]);

        $ics = $service->generateIcs($interview);
        $unfoldedIcs = str_replace(["\r\n ", "\n "], '', $ics);

        // 1. Title
        $this->assertStringContainsString('SUMMARY:Interview Invitation_R1_Soumyadeep Mondal_AIML (Computer Vision & Agentic AI) Engineer_11/8/2026_1700', $unfoldedIcs);

        // 2. Start Time DTSTART is present
        $this->assertStringContainsString('DTSTART', $ics);

        // 3. RFC 5546 METHOD:REQUEST matching MIME method=REQUEST
        $this->assertStringContainsString('METHOD:REQUEST', $ics);
        $this->assertStringContainsString('SEQUENCE:0', $ics);
        $this->assertStringContainsString('ORGANIZER', $ics);

        // 4. Candidate Attendee with RSVP=TRUE
        $this->assertStringContainsString('mailto:soumyadeep@example.com', strtolower($unfoldedIcs));
        $this->assertStringContainsString('RSVP=TRUE', $ics);
        $this->assertStringContainsString('PARTSTAT=NEEDS-ACTION', $ics);

        // 5. Interviewer Attendee is included
        $this->assertStringContainsString('mailto:panelist@company.com', strtolower($unfoldedIcs));

        // 6. 15-Minute Alert / VALARM is included
        $this->assertStringContainsString('BEGIN:VALARM', $ics);
        $this->assertStringContainsString('-PT15M', $ics);
        $this->assertStringContainsString('END:VALARM', $ics);

        // 7. Description contains credentials
        $this->assertStringContainsString('Pass-998877', $unfoldedIcs);
        $this->assertStringContainsString('Focus on PyTorch & OpenCV live coding', $unfoldedIcs);
    }
}