<?php

namespace Tests\Feature;

use App\Models\PayrollEntry;
use App\Models\PayrollRun;
use App\Models\Payslip;
use App\Models\User;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\TestCase;

class PayslipGenerationRelationTest extends TestCase
{
    use RefreshDatabase;

    public function test_payroll_entry_defines_payslip_relationship(): void
    {
        $company = User::factory()->create(['type' => 'company']);
        $employee = User::factory()->create(['type' => 'employee', 'created_by' => $company->id]);

        $payrollRun = PayrollRun::create([
            'title' => 'Test Payroll Run',
            'payroll_frequency' => 'monthly',
            'pay_period_start' => '2026-09-01',
            'pay_period_end' => '2026-09-15',
            'pay_date' => '2026-09-15',
            'status' => 'processing',
            'created_by' => $company->id,
        ]);

        $payrollEntry = PayrollEntry::create([
            'payroll_run_id' => $payrollRun->id,
            'employee_id' => $employee->id,
            'basic_salary' => 15000,
            'net_pay' => 15000,
            'gross_pay' => 15000,
            'created_by' => $company->id,
        ]);

        // Verify relationship method exists and query works
        $pending = PayrollEntry::where('payroll_run_id', $payrollRun->id)
            ->whereDoesntHave('payslip')
            ->exists();

        $this->assertTrue($pending);

        // Create payslip for entry
        $payslip = Payslip::create([
            'payroll_entry_id' => $payrollEntry->id,
            'employee_id' => $employee->id,
            'payslip_number' => 'PS-TEST-001',
            'pay_period_start' => '2026-09-01',
            'pay_period_end' => '2026-09-15',
            'pay_date' => '2026-09-15',
            'status' => 'generated',
            'created_by' => $company->id,
        ]);

        $this->assertInstanceOf(Payslip::class, $payrollEntry->fresh()->payslip);
        $this->assertEquals($payslip->id, $payrollEntry->fresh()->payslip->id);

        // Now whereDoesntHave should return false
        $pendingAfter = PayrollEntry::where('payroll_run_id', $payrollRun->id)
            ->whereDoesntHave('payslip')
            ->exists();

        $this->assertFalse($pendingAfter);
    }
}