<?php
/** @license MIT
 * Copyright 2017 J. King, Dustin Wilson et al.
 * See LICENSE and AUTHORS files for details */

declare(strict_types=1);
namespace JKingWeb\Arsse\TestCase\Db;

use JKingWeb\Arsse\Arsse;
use JKingWeb\Arsse\Database;
use JKingWeb\Arsse\Db\Exception;
use JKingWeb\Arsse\Test\DatabaseInformation;
use org\bovigo\vfs\vfsStream;

class BaseUpdate extends \JKingWeb\Arsse\Test\AbstractTest {
    protected static $interface;
    protected $drv;
    protected $vfs;
    protected $base;
    protected $path;

    public static function setUpBeforeClass() {
        // establish a clean baseline
        static::clearData();
        static::setConf();
        static::$interface = static::dbInterface();
    }
    
    public function setUp() {
        if (!static::$interface) {
            $this->markTestSkipped(static::$implementation." database driver not available");
        }
        self::clearData();
        self::setConf();
        // construct a fresh driver for each test
        $this->drv = new static::$dbDriverClass;
        $schemaId = (get_class($this->drv))::schemaID();
        // set up a virtual filesystem for schema files
        $this->vfs = vfsStream::setup("schemata", null, [$schemaId => []]);
        $this->base = $this->vfs->url();
        $this->path = $this->base."/$schemaId/";
        // completely clear the database
        static::dbRaze(static::$interface);
    }

    public function tearDown() {
        // deconstruct the driver
        unset($this->drv);
        unset($this->path, $this->base, $this->vfs);
        self::clearData();
    }

    public static function tearDownAfterClass() {
        if (static::$interface) {
            // completely clear the database
            static::dbRaze(static::$interface);
        }
        static::$interface = null;
        self::clearData();
    }

    public function testLoadMissingFile() {
        $this->assertException("updateFileMissing", "Db");
        $this->drv->schemaUpdate(1, $this->base);
    }

    public function testLoadUnreadableFile() {
        touch($this->path."0.sql");
        chmod($this->path."0.sql", 0000);
        $this->assertException("updateFileUnreadable", "Db");
        $this->drv->schemaUpdate(1, $this->base);
    }

    public function testLoadCorruptFile() {
        file_put_contents($this->path."0.sql", "This is a corrupt file");
        $this->assertException("updateFileError", "Db");
        $this->drv->schemaUpdate(1, $this->base);
    }

    public function testLoadIncompleteFile() {
        file_put_contents($this->path."0.sql", "create table arsse_meta(\"key\" varchar(255) primary key not null, value text);");
        $this->assertException("updateFileIncomplete", "Db");
        $this->drv->schemaUpdate(1, $this->base);
    }

    public function testLoadEmptyFile() {
        file_put_contents($this->path."0.sql", "");
        $this->assertException("updateFileIncomplete", "Db");
        $this->drv->schemaUpdate(1, $this->base);
    }

    public function testLoadCorrectFile() {
        file_put_contents($this->path."0.sql", static::$minimal1);
        $this->drv->schemaUpdate(1, $this->base);
        $this->assertEquals(1, $this->drv->schemaVersion());
    }

    public function testPerformPartialUpdate() {
        file_put_contents($this->path."0.sql", static::$minimal1);
        file_put_contents($this->path."1.sql", "UPDATE arsse_meta set value = '1' where \"key\" = 'schema_version'");
        $this->assertException("updateFileIncomplete", "Db");
        try {
            $this->drv->schemaUpdate(2, $this->base);
        } catch (Exception $e) {
            $this->assertEquals(1, $this->drv->schemaVersion());
            throw $e;
        }
    }

    public function testPerformSequentialUpdate() {
        file_put_contents($this->path."0.sql", static::$minimal1);
        file_put_contents($this->path."1.sql", static::$minimal2);
        $this->drv->schemaUpdate(2, $this->base);
        $this->assertEquals(2, $this->drv->schemaVersion());
    }

    public function testPerformActualUpdate() {
        $this->drv->schemaUpdate(Database::SCHEMA_VERSION);
        $this->assertEquals(Database::SCHEMA_VERSION, $this->drv->schemaVersion());
    }

    public function testDeclineManualUpdate() {
        // turn auto-updating off
        Arsse::$conf->dbAutoUpdate = false;
        $this->assertException("updateManual", "Db");
        $this->drv->schemaUpdate(Database::SCHEMA_VERSION);
    }

    public function testDeclineDowngrade() {
        $this->assertException("updateTooNew", "Db");
        $this->drv->schemaUpdate(-1, $this->base);
    }

    public function testPerformMaintenance() {
        $this->drv->schemaUpdate(Database::SCHEMA_VERSION);
        $this->assertTrue($this->drv->maintenance());
    }
}