<?php

namespace SilverStripe\Assets\Tests\Storage;

use SilverStripe\Assets\Storage\DefaultAssetNameGenerator;
use SilverStripe\Core\Config\Config;
use SilverStripe\Dev\SapphireTest;

/**
 * covers {@see DefaultAssetNameGenerator}
 */
class DefaultAssetNameGeneratorTest extends SapphireTest
{

    /**
     * Test non-prefix behaviour
     */
    public function testWithoutPrefix()
    {
        Config::inst()->update(DefaultAssetNameGenerator::class, 'version_prefix', '');
        $generator = new DefaultAssetNameGenerator('folder/MyFile-001.jpg');
        $suggestions = iterator_to_array($generator);

        // Expect 100 suggestions
        $this->assertEquals(100, count($suggestions));

        // First item is always the same as input
        $this->assertEquals('folder/MyFile-001.jpg', $suggestions[0]);

        // Check that padding is respected
        $this->assertEquals('folder/MyFile-002.jpg', $suggestions[1]);
        $this->assertEquals('folder/MyFile-003.jpg', $suggestions[2]);
        $this->assertEquals('folder/MyFile-004.jpg', $suggestions[3]);
        $this->assertEquals('folder/MyFile-021.jpg', $suggestions[20]);
        $this->assertEquals('folder/MyFile-099.jpg', $suggestions[98]);

        // Last item should be some semi-random string, not in the same numeric sequence
        $this->assertNotEquals('folder/MyFile-0100.jpg', $suggestions[99]);
        $this->assertNotEquals('folder/MyFile-100.jpg', $suggestions[99]);

        // Test with a value starting above 1
        $generator = new DefaultAssetNameGenerator('folder/MyFile-024.jpg');
        $suggestions = iterator_to_array($generator);
        $this->assertEquals(100, count($suggestions));
        $this->assertEquals('folder/MyFile-024.jpg', $suggestions[0]);
        $this->assertEquals('folder/MyFile-025.jpg', $suggestions[1]);
        $this->assertEquals('folder/MyFile-026.jpg', $suggestions[2]);
        $this->assertEquals('folder/MyFile-048.jpg', $suggestions[24]);
        $this->assertEquals('folder/MyFile-122.jpg', $suggestions[98]);
        $this->assertNotEquals('folder/MyFile-0123.jpg', $suggestions[99]);
        $this->assertNotEquals('folder/MyFile-123.jpg', $suggestions[99]); // Last suggestion is semi-random

        // Test without numeric value
        $generator = new DefaultAssetNameGenerator('folder/MyFile.jpg');
        $suggestions = iterator_to_array($generator);
        $this->assertEquals(100, count($suggestions));
        $this->assertEquals('folder/MyFile.jpg', $suggestions[0]);
        $this->assertEquals('folder/MyFile2.jpg', $suggestions[1]);
        $this->assertEquals('folder/MyFile3.jpg', $suggestions[2]);
        $this->assertEquals('folder/MyFile25.jpg', $suggestions[24]);
        $this->assertEquals('folder/MyFile99.jpg', $suggestions[98]);
        $this->assertNotEquals('folder/MyFile100.jpg', $suggestions[99]); // Last suggestion is semi-random
    }

    /**
     * Test with default -v prefix
     */
    public function testWithDefaultPrefix()
    {
        Config::inst()->update(DefaultAssetNameGenerator::class, 'version_prefix', '-v');

        // Test with item that doesn't contain the prefix
        $generator = new DefaultAssetNameGenerator('folder/MyFile-001.jpg');
        $suggestions = iterator_to_array($generator);
        $this->assertEquals(100, count($suggestions));
        $this->assertEquals('folder/MyFile-001.jpg', $suggestions[0]);
        $this->assertEquals('folder/MyFile-001-v2.jpg', $suggestions[1]);
        $this->assertEquals('folder/MyFile-001-v4.jpg', $suggestions[3]);
        $this->assertEquals('folder/MyFile-001-v21.jpg', $suggestions[20]);
        $this->assertEquals('folder/MyFile-001-v99.jpg', $suggestions[98]);
        $this->assertNotEquals('folder/MyFile-001-v100.jpg', $suggestions[99]); // Last suggestion is semi-random


        // Test with item that contains prefix
        $generator = new DefaultAssetNameGenerator('folder/MyFile-v24.jpg');
        $suggestions = iterator_to_array($generator);
        $this->assertEquals(100, count($suggestions));
        $this->assertEquals('folder/MyFile-v24.jpg', $suggestions[0]);
        $this->assertEquals('folder/MyFile-v25.jpg', $suggestions[1]);
        $this->assertEquals('folder/MyFile-v26.jpg', $suggestions[2]);
        $this->assertEquals('folder/MyFile-v48.jpg', $suggestions[24]);
        $this->assertEquals('folder/MyFile-v122.jpg', $suggestions[98]);
        $this->assertNotEquals('folder/MyFile-v123.jpg', $suggestions[99]);
        $this->assertNotEquals('folder/MyFile-123.jpg', $suggestions[99]);

        // Test without numeric value
        $generator = new DefaultAssetNameGenerator('folder/MyFile.jpg');
        $suggestions = iterator_to_array($generator);
        $this->assertEquals(100, count($suggestions));
        $this->assertEquals('folder/MyFile.jpg', $suggestions[0]);
        $this->assertEquals('folder/MyFile-v2.jpg', $suggestions[1]);
        $this->assertEquals('folder/MyFile-v3.jpg', $suggestions[2]);
        $this->assertEquals('folder/MyFile-v25.jpg', $suggestions[24]);
        $this->assertEquals('folder/MyFile-v99.jpg', $suggestions[98]);
        $this->assertNotEquals('folder/MyFile-v100.jpg', $suggestions[99]);
    }

    public function testFolderWithoutDefaultPrefix()
    {
        Config::inst()->update(DefaultAssetNameGenerator::class, 'version_prefix', '');
        $generator = new DefaultAssetNameGenerator('folder/subfolder');
        $suggestions = iterator_to_array($generator);

        // Expect 100 suggestions
        $this->assertEquals(100, count($suggestions));

        // First item is always the same as input
        $this->assertEquals('folder/subfolder', $suggestions[0]);
        $this->assertEquals('folder/subfolder2', $suggestions[1]);
    }

    public function testFolderWithDefaultPrefix()
    {
        Config::inst()->update(DefaultAssetNameGenerator::class, 'version_prefix', '-v');
        $generator = new DefaultAssetNameGenerator('folder/subfolder');
        $suggestions = iterator_to_array($generator);

        // Expect 100 suggestions
        $this->assertEquals(100, count($suggestions));

        // First item is always the same as input
        $this->assertEquals('folder/subfolder', $suggestions[0]);
        $this->assertEquals('folder/subfolder-v2', $suggestions[1]);
    }
}