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<?php

    namespace Inlm\SchemaGenerator\Dumpers;

    use CzProject\SqlGenerator;
    use CzProject\SqlSchema;
    use Inlm\SchemaGenerator\Diffs;
    use Inlm\SchemaGenerator\IDumper;


    class SqlDumper extends AbstractSqlDumper
    {
        const FLAT = 0;
        const YEAR = 1;
        const YEAR_MONTH = 2;

        /** @var string */
        private $directory;

        /** @var SqlGenerator\IDriver */
        private $driver;

        /** @var int */
        private $outputStructure = self::FLAT;


        /**
         * @param  string
         */
        public function __construct($directory, SqlGenerator\IDriver $driver)
        {
            $this->directory = $directory;
            $this->driver = $driver;
        }


        /**
         * @param  int
         * @return self
         */
        public function setOutputStructure($outputStructure)
        {
            $this->outputStructure = $outputStructure;
            return $this;
        }


        /**
         * @return self
         * @deprecated
         */
        public function setDeepStructure()
        {
            $this->outputStructure = self::YEAR_MONTH;
            return $this;
        }


        /**
         * @return void
         */
        public function end()
        {
            if (!$this->sqlDocument->isEmpty()) {
                $directory = $this->directory;

                if ($this->outputStructure === self::YEAR_MONTH) {
                    $directory .= '/' . date('Y/m');

                } elseif ($this->outputStructure === self::YEAR) {
                    $directory .= '/' . date('Y');

                } elseif ($this->outputStructure !== self::FLAT) {
                    throw new \Inlm\SchemaGenerator\InvalidArgumentException("Invalid output structure '{$this->outputStructure}'.");
                }

                $path = $directory . '/' . date('Y-m-d-His') . '.sql';

                if (file_exists($path)) {
                    throw new \Inlm\SchemaGenerator\FileSystemException("File '$path' already exists.");
                }

                @mkdir($directory, 0777, TRUE);
                file_put_contents($path, $this->sqlDocument->toSql($this->driver));
            }
            $this->sqlDocument = NULL;
        }
    }