<?php

namespace Tests\Unit;

use PHPUnit\Framework\TestCase;
use System\Classes\MyException;
use System\Classes\Validation;

class ValidationTest extends TestCase
{
    public function testValidDataPasses(): void
    {
        $v = Validation::factory(['email' => 'a@b.com', 'age' => '20'])
            ->rule('email', 'email')
            ->rule('age', 'digit');

        $this->assertTrue($v->check());
        $this->assertSame([], $v->errors());
    }

    public function testRequiredFailsOnEmpty(): void
    {
        $v = Validation::factory(['name' => ''])->rule('name', 'required');

        $this->assertFalse($v->check());
        $this->assertArrayHasKey('name', $v->errors());
    }

    public function testRequiredFailsOnMissingKey(): void
    {
        $v = Validation::factory([])->rule('name', 'required');

        $this->assertFalse($v->check());
        $this->assertArrayHasKey('name', $v->errors());
    }

    public function testEmptyOptionalFieldSkipsOtherRules(): void
    {
        // Поле пустое, но required нет — email-правило не должно срабатывать.
        $v = Validation::factory(['email' => ''])->rule('email', 'email');

        $this->assertTrue($v->check());
        $this->assertSame([], $v->errors());
    }

    public function testStopsAtFirstErrorPerField(): void
    {
        // required и email оба провалились бы, но сообщение должно быть от required.
        $v = Validation::factory(['email' => ''])
            ->rule('email', 'required')
            ->rule('email', 'email');

        $this->assertFalse($v->check());
        $this->assertStringContainsString('обязательно', $v->error('email'));
    }

    public function testEmailRule(): void
    {
        $bad = Validation::factory(['email' => 'not-an-email'])->rule('email', 'email');
        $this->assertFalse($bad->check());

        $ok = Validation::factory(['email' => 'user@example.com'])->rule('email', 'email');
        $this->assertTrue($ok->check());
    }

    public function testUrlRule(): void
    {
        $bad = Validation::factory(['site' => 'example'])->rule('site', 'url');
        $this->assertFalse($bad->check());

        $ok = Validation::factory(['site' => 'https://example.com'])->rule('site', 'url');
        $this->assertTrue($ok->check());
    }

    public function testNumericRule(): void
    {
        $this->assertTrue(Validation::factory(['n' => '3.14'])->rule('n', 'numeric')->check());
        $this->assertFalse(Validation::factory(['n' => '12abc'])->rule('n', 'numeric')->check());
    }

    public function testDigitRule(): void
    {
        $this->assertTrue(Validation::factory(['n' => '42'])->rule('n', 'digit')->check());
        $this->assertFalse(Validation::factory(['n' => '3.14'])->rule('n', 'digit')->check());
    }

    public function testMinLengthRule(): void
    {
        $this->assertFalse(Validation::factory(['p' => '123'])->rule('p', 'min_length', [8])->check());
        $this->assertTrue(Validation::factory(['p' => '12345678'])->rule('p', 'min_length', [8])->check());
    }

    public function testMaxLengthRule(): void
    {
        $this->assertFalse(Validation::factory(['p' => '123456'])->rule('p', 'max_length', [4])->check());
        $this->assertTrue(Validation::factory(['p' => '1234'])->rule('p', 'max_length', [4])->check());
    }

    public function testExactLengthRule(): void
    {
        $this->assertTrue(Validation::factory(['code' => '1234'])->rule('code', 'exact_length', [4])->check());
        $this->assertFalse(Validation::factory(['code' => '12345'])->rule('code', 'exact_length', [4])->check());
    }

    public function testMinLengthCountsMultibyte(): void
    {
        // 4 кириллических символа — должно проходить min_length(4).
        $this->assertTrue(Validation::factory(['p' => 'тест'])->rule('p', 'min_length', [4])->check());
    }

    public function testMatchesRule(): void
    {
        $ok = Validation::factory(['pass' => 'secret', 'confirm' => 'secret'])
            ->rule('confirm', 'matches', ['pass']);
        $this->assertTrue($ok->check());

        $bad = Validation::factory(['pass' => 'secret', 'confirm' => 'other'])
            ->rule('confirm', 'matches', ['pass']);
        $this->assertFalse($bad->check());
    }

    public function testInRule(): void
    {
        $ok = Validation::factory(['role' => 'admin'])
            ->rule('role', 'in', [['admin', 'user']]);
        $this->assertTrue($ok->check());

        $bad = Validation::factory(['role' => 'root'])
            ->rule('role', 'in', [['admin', 'user']]);
        $this->assertFalse($bad->check());
    }

    public function testRegexRule(): void
    {
        $ok = Validation::factory(['slug' => 'hello-world'])
            ->rule('slug', 'regex', ['/^[a-z\-]+$/']);
        $this->assertTrue($ok->check());

        $bad = Validation::factory(['slug' => 'Hello World'])
            ->rule('slug', 'regex', ['/^[a-z\-]+$/']);
        $this->assertFalse($bad->check());
    }

    public function testLabelAppearsInMessage(): void
    {
        $v = Validation::factory(['email' => 'bad'])
            ->label('email', 'E-mail')
            ->rule('email', 'email');

        $v->check();
        $this->assertStringContainsString('E-mail', $v->error('email'));
    }

    public function testMatchesMessageUsesParamLabel(): void
    {
        $v = Validation::factory(['pass' => 'a', 'confirm' => 'b'])
            ->label('pass', 'Пароль')
            ->rule('confirm', 'matches', ['pass']);

        $v->check();
        $this->assertStringContainsString('Пароль', $v->error('confirm'));
    }

    public function testParamPlaceholderInMessage(): void
    {
        $v = Validation::factory(['p' => '1'])->rule('p', 'min_length', [8]);
        $v->check();
        $this->assertStringContainsString('8', $v->error('p'));
    }

    public function testErrorReturnsNullForValidField(): void
    {
        $v = Validation::factory(['email' => 'a@b.com'])->rule('email', 'email');
        $v->check();
        $this->assertNull($v->error('email'));
    }

    public function testMultipleFieldsCollectErrors(): void
    {
        $v = Validation::factory(['email' => 'bad', 'age' => 'x'])
            ->rule('email', 'email')
            ->rule('age', 'digit');

        $this->assertFalse($v->check());
        $this->assertCount(2, $v->errors());
    }

    public function testFluentReturnsStatic(): void
    {
        $v = Validation::factory([]);
        $this->assertSame($v, $v->rule('a', 'required'));
        $this->assertSame($v, $v->label('a', 'A'));
    }

    public function testUnknownRuleThrows(): void
    {
        $this->expectException(MyException::class);
        Validation::factory(['a' => 'x'])->rule('a', 'no_such_rule')->check();
    }

    public function testCheckIsRepeatableAndResetsErrors(): void
    {
        $v = Validation::factory(['email' => 'bad'])->rule('email', 'email');
        $this->assertFalse($v->check());
        $this->assertCount(1, $v->errors());

        // Повторный вызов не накапливает ошибки.
        $this->assertFalse($v->check());
        $this->assertCount(1, $v->errors());
    }
}