<?php

namespace Tests\Unit;

use App\Models\City;
use App\Models\Country;
use App\Models\State;
use App\Models\Student;
use App\Models\StudentContractInstallment;
use App\Models\Unit;
use App\Services\StudentContractService;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\TestCase;

/**
 * Taxa de Contratação / Entrada: abate do Total do Curso antes de dividir as
 * parcelas restantes, e gera sua própria parcela (REF. ENTRADA), do mesmo
 * jeito que a matrícula já funciona.
 */
class StudentContractDownPaymentTest extends TestCase
{
    use RefreshDatabase;

    private Unit $unit;

    private StudentContractService $service;

    protected function setUp(): void
    {
        parent::setUp();

        $this->unit = $this->makeUnit();
        $this->service = new StudentContractService();
    }

    public function test_down_payment_reduces_total_installments_basis_and_creates_its_own_installment(): void
    {
        $student = Student::create([
            'name'    => 'Aluno Teste',
            'unit_id' => $this->unit->id,
            'status'  => 'active',
        ]);

        $contract = $this->service->create([
            'student_id'         => $student->id,
            'unit_id'            => $this->unit->id,
            'status'             => 'pending',
            'total_value'        => 5843.00,
            'total_installments' => 13,
            'total_due_date'     => '2026-10-10',
            'down_payment_value' => 500.00,
            'down_payment_date'  => '2026-09-15',
        ]);

        $installments = StudentContractInstallment::where('student_contract_id', $contract->id)
            ->orderBy('type')
            ->get();

        $downPayment = $installments->firstWhere('type', 'down_payment');

        $this->assertNotNull($downPayment);
        $this->assertSame('REF. ENTRADA', $downPayment->history);
        $this->assertSame(1, $downPayment->total_installments);
        $this->assertEquals(500.00, $downPayment->value);
        $this->assertSame('2026-09-15', $downPayment->due_date->format('Y-m-d'));

        $totalInstallments = $installments->where('type', 'total');

        $this->assertCount(13, $totalInstallments);
        // (5843 - 500) / 13 = 411.00
        $this->assertEquals(411.00, $totalInstallments->first()->value);
    }

    public function test_without_down_payment_total_installments_use_full_value(): void
    {
        $student = Student::create([
            'name'    => 'Aluno Sem Entrada',
            'unit_id' => $this->unit->id,
            'status'  => 'active',
        ]);

        $contract = $this->service->create([
            'student_id'         => $student->id,
            'unit_id'            => $this->unit->id,
            'status'             => 'pending',
            'total_value'        => 1300.00,
            'total_installments' => 13,
            'total_due_date'     => '2026-10-10',
        ]);

        $installments = StudentContractInstallment::where('student_contract_id', $contract->id)->get();

        $this->assertNull($installments->firstWhere('type', 'down_payment'));

        $totalInstallments = $installments->where('type', 'total');

        $this->assertCount(13, $totalInstallments);
        $this->assertEquals(100.00, $totalInstallments->first()->value);
    }

    private function makeUnit(): Unit
    {
        $country = Country::create(['name' => 'Brasil', 'code' => 'BR']);
        $state   = State::create(['name' => 'Paraná', 'code' => 'PR', 'country_id' => $country->id]);
        $city    = City::create(['name' => 'Maringá', 'country_id' => $country->id, 'state_id' => $state->id]);

        return Unit::create([
            'fantasy_name'     => 'Unidade Teste',
            'social_reason'    => 'Unidade Teste LTDA',
            'cnpj'             => '00000000000191',
            'street'           => 'Rua Teste',
            'neighborhood'     => 'Centro',
            'postal_code'      => '87000000',
            'city_id'          => $city->id,
            'state_id'         => $state->id,
            'email'            => 'unidade@teste.com',
            'name_responsible' => 'Responsável Teste',
        ]);
    }
}