<?php

namespace Tests\Unit;

use App\Services\Ai\VinDecoder;
use Tests\TestCase;

class VinDecoderTest extends TestCase
{
    private VinDecoder $d;

    protected function setUp(): void
    {
        parent::setUp();
        $this->d = new VinDecoder;
    }

    public function test_rejects_invalid_length(): void
    {
        $r = $this->d->decode('SHORTVIN');
        $this->assertFalse($r['valid_length']);
    }

    public function test_decodes_honda_vin_2003(): void
    {
        $r = $this->d->decode('1HGCM82633A123456');
        $this->assertTrue($r['valid_length']);
        $this->assertEquals('1HG', $r['wmi']);
        $this->assertEquals('Honda', $r['manufacturer']);
        $this->assertEquals('USA', $r['country']);
        $this->assertEquals('North America', $r['region']);
        $this->assertEquals(2003, $r['year']);
    }

    public function test_decodes_vw_european_vin(): void
    {
        // VW Bora 1999
        $r = $this->d->decode('WVWZZZ1JZXW000001');
        $this->assertEquals('VW', $r['manufacturer']);
        $this->assertEquals('Germany', $r['country']);
        $this->assertEquals(1999, $r['year']);
    }

    public function test_decodes_audi_post_2010(): void
    {
        // Audi A4 2014 — year code E (pos 10), pos 7 alpha → 2014 not 1984
        $r = $this->d->decode('WAUZZZF40EA123456');
        $this->assertEquals('Audi', $r['manufacturer']);
        $this->assertEquals(2014, $r['year']);
    }

    public function test_decodes_dacia(): void
    {
        $r = $this->d->decode('UU1KSDAAH50123456');
        $this->assertEquals('Dacia', $r['manufacturer']);
        $this->assertEquals('Romania', $r['country']);
    }

    public function test_unknown_wmi_returns_null_manufacturer(): void
    {
        $r = $this->d->decode('ZZZZZZZZZZZZZZZZZ');
        $this->assertNull($r['manufacturer']);
    }

    public function test_strips_lowercase_and_dashes(): void
    {
        $r = $this->d->decode('1hg-cm82-633a123456');
        $this->assertTrue($r['valid_length']);
        $this->assertEquals('Honda', $r['manufacturer']);
    }

    public function test_rejects_forbidden_chars_iqo(): void
    {
        // I, O, Q are stripped by VIN normalization; result is shorter, so invalid length.
        $r = $this->d->decode('1HGCM82633AIOQ1234');
        $this->assertFalse($r['valid_length']);
    }
}