<?php

namespace Tests\Unit\Services;

use App\Services\PdfConverterClient;
use Illuminate\Support\Facades\Http;
use Tests\TestCase;

class PdfConverterClientTest extends TestCase
{
    private string $tempXlsxPath;
    private string $tempPdfPath;

    protected function setUp(): void
    {
        parent::setUp();
        $this->tempXlsxPath = sys_get_temp_dir() . '/test_pdf_converter_' . uniqid() . '.xlsx';
        $this->tempPdfPath = str_replace('.xlsx', '.pdf', $this->tempXlsxPath);

        // Create a minimal xlsx file so file_exists() passes inside convert()
        file_put_contents($this->tempXlsxPath, 'fake xlsx content');
    }

    protected function tearDown(): void
    {
        if (file_exists($this->tempXlsxPath)) {
            unlink($this->tempXlsxPath);
        }
        if (file_exists($this->tempPdfPath)) {
            unlink($this->tempPdfPath);
        }
        parent::tearDown();
    }

    public function test_convert_writes_pdf_file_on_successful_response(): void
    {
        $fakePdfContent = '%PDF-1.4 fake pdf content';

        Http::fake([
            PdfConverterClient::CONVERTER_ADDRESS => Http::response($fakePdfContent, 200),
        ]);

        PdfConverterClient::convert($this->tempXlsxPath);

        $this->assertFileExists($this->tempPdfPath);
        $this->assertEquals($fakePdfContent, file_get_contents($this->tempPdfPath));
    }

    public function test_convert_sends_request_to_correct_url(): void
    {
        Http::fake([
            PdfConverterClient::CONVERTER_ADDRESS => Http::response('pdf-data', 200),
        ]);

        PdfConverterClient::convert($this->tempXlsxPath);

        Http::assertSent(function ($request) {
            return $request->url() === PdfConverterClient::CONVERTER_ADDRESS;
        });
    }

    public function test_convert_sends_file_as_multipart_attachment(): void
    {
        Http::fake([
            PdfConverterClient::CONVERTER_ADDRESS => Http::response('pdf-data', 200),
        ]);

        PdfConverterClient::convert($this->tempXlsxPath);

        Http::assertSent(function ($request) {
            return str_contains($request->header('Content-Type')[0] ?? '', 'multipart/form-data');
        });
    }

    public function test_convert_does_not_write_pdf_on_error_response(): void
    {
        Http::fake([
            PdfConverterClient::CONVERTER_ADDRESS => Http::response('error', 500),
        ]);

        PdfConverterClient::convert($this->tempXlsxPath);

        $this->assertFileDoesNotExist($this->tempPdfPath);
    }

    public function test_convert_throws_exception_when_file_does_not_exist(): void
    {
        $this->expectException(\Exception::class);
        $this->expectExceptionMessage('File does not exist');

        PdfConverterClient::convert('/non/existent/path/file.xlsx');
    }

    public function test_convert_replaces_xlsx_extension_with_pdf(): void
    {
        Http::fake([
            PdfConverterClient::CONVERTER_ADDRESS => Http::response('pdf-bytes', 200),
        ]);

        PdfConverterClient::convert($this->tempXlsxPath);

        $expectedPdfPath = str_replace('.xlsx', '.pdf', $this->tempXlsxPath);
        $this->assertFileExists($expectedPdfPath);
    }

    public function test_converter_address_constant_is_correct(): void
    {
        $this->assertEquals(
            'http://pdf-converter:5000/convert',
            PdfConverterClient::CONVERTER_ADDRESS
        );
    }
}