<?php

namespace Tests\Unit;

use App\Services\SmsMessageAnalyzer;
use PHPUnit\Framework\Attributes\DataProvider;
use Tests\TestCase;

class SmsMessageAnalyzerTest extends TestCase
{
    private SmsMessageAnalyzer $analyzer;

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

        $this->analyzer = new SmsMessageAnalyzer;
    }

    public function test_empty_message_has_zero_parts(): void
    {
        $this->assertSame(0, $this->analyzer->estimatedParts(''));
    }

    public function test_gsm_single_part_message(): void
    {
        $message = str_repeat('A', 160);

        $this->assertTrue($this->analyzer->isGsm7($message));
        $this->assertSame(1, $this->analyzer->estimatedParts($message));
    }

    public function test_gsm_multi_part_message(): void
    {
        $message = str_repeat('A', 161);

        $this->assertSame(2, $this->analyzer->estimatedParts($message));
    }

    public function test_unicode_single_part_message(): void
    {
        $message = 'Привет';

        $this->assertFalse($this->analyzer->isGsm7($message));
        $this->assertSame(1, $this->analyzer->estimatedParts($message));
    }

    public function test_unicode_multi_part_message(): void
    {
        $message = str_repeat('Я', 71);

        $this->assertSame(2, $this->analyzer->estimatedParts($message));
    }

    #[DataProvider('summaryProvider')]
    public function test_summary(string $message, string $expectedSubstring): void
    {
        $this->assertStringContainsString($expectedSubstring, $this->analyzer->summary($message));
    }

    /**
     * @return array<string, array{0: string, 1: string}>
     */
    public static function summaryProvider(): array
    {
        return [
            'empty' => ['', '0 harp'],
            'gsm' => ['Hello', '5 harp · 1 SMS'],
            'unicode' => ['你好', '2 harp · 1 SMS'],
        ];
    }
}