<?php

namespace SilverStripe\Assets\Tests;

use SilverStripe\Assets\File;
use SilverStripe\Assets\Filesystem;
use SilverStripe\Assets\FileMigrationHelper;
use SilverStripe\Assets\Folder;
use SilverStripe\Assets\Tests\FileMigrationHelperTest\Extension;
use SilverStripe\Core\Config\Config;
use SilverStripe\Dev\SapphireTest;
use SilverStripe\Assets\Tests\Storage\AssetStoreTest\TestAssetStore;

/**
 * Ensures that File dataobjects can be safely migrated from 3.x
 */
class FileMigrationHelperTest extends SapphireTest
{

    protected static $fixture_file = 'FileMigrationHelperTest.yml';

    protected $requiredExtensions = array(
        File::class => array(
            Extension::class
        )
    );

    /**
     * get the BASE_PATH for this test
     *
     * @return string
     */
    protected function getBasePath()
    {
        // Note that the actual filesystem base is the 'assets' subdirectory within this
        return ASSETS_PATH . '/FileMigrationHelperTest';
    }


    public function setUp()
    {
        Config::nest(); // additional nesting here necessary
        Config::inst()->update(File::class, 'migrate_legacy_file', false);
        parent::setUp();

        // Set backend root to /FileMigrationHelperTest/assets
        TestAssetStore::activate('FileMigrationHelperTest/assets');

        // Ensure that each file has a local record file in this new assets base
        $from = FRAMEWORK_PATH . '/tests/php/ORM/ImageTest/test-image-low-quality.jpg';
        foreach (File::get()->exclude('ClassName', Folder::class) as $file) {
            $dest = TestAssetStore::base_path() . '/' . $file->generateFilename();
            Filesystem::makeFolder(dirname($dest));
            copy($from, $dest);
        }
    }

    public function tearDown()
    {
        TestAssetStore::reset();
        Filesystem::removeFolder($this->getBasePath());
        parent::tearDown();
        Config::unnest();
    }

    /**
     * Test file migration
     */
    public function testMigration()
    {
        // Prior to migration, check that each file has empty Filename / Hash properties
        foreach (File::get()->exclude('ClassName', Folder::class) as $file) {
            $filename = $file->generateFilename();
            $this->assertNotEmpty($filename, "File {$file->Name} has a filename");
            $this->assertEmpty($file->File->getFilename(), "File {$file->Name} has no DBFile filename");
            $this->assertEmpty($file->File->getHash(), "File {$file->Name} has no hash");
            $this->assertFalse($file->exists(), "File with name {$file->Name} does not yet exist");
            $this->assertFalse($file->isPublished(), "File is not published yet");
        }

        // Do migration
        $helper = new FileMigrationHelper();
        $result = $helper->run($this->getBasePath());
        $this->assertEquals(5, $result);

        // Test that each file exists
        foreach (File::get()->exclude('ClassName', Folder::class) as $file) {
            $expectedFilename = $file->generateFilename();
            $filename = $file->File->getFilename();
            $this->assertTrue($file->exists(), "File with name {$filename} exists");
            $this->assertNotEmpty($filename, "File {$file->Name} has a Filename");
            $this->assertEquals($expectedFilename, $filename, "File {$file->Name} has retained its Filename value");
            $this->assertEquals(
                '33be1b95cba0358fe54e8b13532162d52f97421c',
                $file->File->getHash(),
                "File with name {$filename} has the correct hash"
            );
            $this->assertTrue($file->isPublished(), "File is published after migration");
        }
    }
}