<?php

namespace BeyondSEODeps\Doctrine\DBAL\Schema;

use BeyondSEODeps\Doctrine\DBAL\Platforms\AbstractMySQLPlatform;
use BeyondSEODeps\Doctrine\DBAL\Platforms\MariaDb1027Platform;
use BeyondSEODeps\Doctrine\DBAL\Platforms\MySQL;
use BeyondSEODeps\Doctrine\DBAL\Platforms\MySQL\CollationMetadataProvider\CachingCollationMetadataProvider;
use BeyondSEODeps\Doctrine\DBAL\Platforms\MySQL\CollationMetadataProvider\ConnectionCollationMetadataProvider;
use BeyondSEODeps\Doctrine\DBAL\Result;
use BeyondSEODeps\Doctrine\DBAL\Types\Type;
use BeyondSEODeps\Doctrine\Deprecations\Deprecation;
use function array_change_key_case;
use function array_shift;
use function assert;
use function explode;
use function implode;
use function is_string;
use function preg_match;
use function strpos;
use function strtok;
use function strtolower;
use function strtr;
use const CASE_LOWER;
/**
 * Schema manager for the MySQL RDBMS.
 *
 * @extends AbstractSchemaManager<AbstractMySQLPlatform>
 */
class MySQLSchemaManager extends AbstractSchemaManager
{
    /** @see \https://mariadb.com/kb/en/library/string-literals/#escape-sequences */
    private const MARIADB_ESCAPE_SEQUENCES = [
        '\0' => "\x00",
        "\\'" => "'",
        '\"' => '"',
        '\b' => "\\b",
        '\n' => "\n",
        '\r' => "\r",
        '\t' => "\t",
        '\Z' => "\x1a",
        '\\\\' => '\\',
        '\%' => '%',
        '\_' => '_',
        // Internally, MariaDB escapes single quotes using the standard syntax
        "''" => "'",
    ];
    /**
     * {@inheritDoc}
     */
    public function listTableNames()
    {
        return $this->doListTableNames();
    }
    /**
     * {@inheritDoc}
     */
    public function listTables()
    {
        return $this->doListTables();
    }
    /**
     * {@inheritDoc}
     *
     * @deprecated Use {@see introspectTable()} instead.
     */
    public function listTableDetails($name)
    {
        Deprecation::triggerIfCalledFromOutside('doctrine/dbal', 'https://github.com/doctrine/dbal/pull/5595', '%s is deprecated. Use introspectTable() instead.', __METHOD__);
        return $this->doListTableDetails($name);
    }
    /**
     * {@inheritDoc}
     */
    public function listTableColumns($table, $database = null)
    {
        return $this->doListTableColumns($table, $database);
    }
    /**
     * {@inheritDoc}
     */
    public function listTableIndexes($table)
    {
        return $this->doListTableIndexes($table);
    }
    /**
     * {@inheritDoc}
     */
    public function listTableForeignKeys($table, $database = null)
    {
        return $this->doListTableForeignKeys($table, $database);
    }
    /**
     * {@inheritDoc}
     */
    protected function _getPortableViewDefinition($view)
    {
        return new View($view['TABLE_NAME'], $view['VIEW_DEFINITION']);
    }
    /**
     * {@inheritDoc}
     */
    protected function _getPortableTableDefinition($table)
    {
        return array_shift($table);
    }
    /**
     * {@inheritDoc}
     */
    protected function _getPortableTableIndexesList($tableIndexes, $tableName = null)
    {
        foreach ($tableIndexes as $k => $v) {
            $v = array_change_key_case($v, CASE_LOWER);
            if ($v['key_name'] === 'PRIMARY') {
                $v['primary'] = true;
            } else {
                $v['primary'] = false;
            }
            if (strpos($v['index_type'], 'FULLTEXT') !== false) {
                $v['flags'] = ['FULLTEXT'];
            } elseif (strpos($v['index_type'], 'SPATIAL') !== false) {
                $v['flags'] = ['SPATIAL'];
            }
            // Ignore prohibited prefix `length` for spatial index
            if (strpos($v['index_type'], 'SPATIAL') === false) {
                $v['length'] = isset($v['sub_part']) ? (int) $v['sub_part'] : null;
            }
            $tableIndexes[$k] = $v;
        }
        return parent::_getPortableTableIndexesList($tableIndexes, $tableName);
    }
    /**
     * {@inheritDoc}
     */
    protected function _getPortableDatabaseDefinition($database)
    {
        return $database['Database'];
    }
    /**
     * {@inheritDoc}
     */
    protected function _getPortableTableColumnDefinition($tableColumn)
    {
        $tableColumn = array_change_key_case($tableColumn, CASE_LOWER);
        $dbType = strtolower($tableColumn['type']);
        $dbType = strtok($dbType, '(), ');
        assert(is_string($dbType));
        $length = $tableColumn['length'] ?? strtok('(), ');
        $fixed = null;
        if (!isset($tableColumn['name'])) {
            $tableColumn['name'] = '';
        }
        $scale = null;
        $precision = null;
        $type = $origType = $this->_platform->getDoctrineTypeMapping($dbType);
        // In cases where not connected to a database DESCRIBE $table does not return 'Comment'
        if (isset($tableColumn['comment'])) {
            $type = $this->extractDoctrineTypeFromComment($tableColumn['comment'], $type);
            $tableColumn['comment'] = $this->removeDoctrineTypeFromComment($tableColumn['comment'], $type);
        }
        switch ($dbType) {
            case 'char':
            case 'binary':
                $fixed = true;
                break;
            case 'float':
            case 'double':
            case 'real':
            case 'numeric':
            case 'decimal':
                if (preg_match('([A-Za-z]+\(([0-9]+),([0-9]+)\))', $tableColumn['type'], $match) === 1) {
                    $precision = $match[1];
                    $scale = $match[2];
                    $length = null;
                }
                break;
            case 'tinytext':
                $length = AbstractMySQLPlatform::LENGTH_LIMIT_TINYTEXT;
                break;
            case 'text':
                $length = AbstractMySQLPlatform::LENGTH_LIMIT_TEXT;
                break;
            case 'mediumtext':
                $length = AbstractMySQLPlatform::LENGTH_LIMIT_MEDIUMTEXT;
                break;
            case 'tinyblob':
                $length = AbstractMySQLPlatform::LENGTH_LIMIT_TINYBLOB;
                break;
            case 'blob':
                $length = AbstractMySQLPlatform::LENGTH_LIMIT_BLOB;
                break;
            case 'mediumblob':
                $length = AbstractMySQLPlatform::LENGTH_LIMIT_MEDIUMBLOB;
                break;
            case 'tinyint':
            case 'smallint':
            case 'mediumint':
            case 'int':
            case 'integer':
            case 'bigint':
            case 'year':
                $length = null;
                break;
        }
        if ($this->_platform instanceof MariaDb1027Platform) {
            $columnDefault = $this->getMariaDb1027ColumnDefault($this->_platform, $tableColumn['default']);
        } else {
            $columnDefault = $tableColumn['default'];
        }
        $options = ['length' => $length !== null ? (int) $length : null, 'unsigned' => strpos($tableColumn['type'], 'unsigned') !== false, 'fixed' => (bool) $fixed, 'default' => $columnDefault, 'notnull' => $tableColumn['null'] !== 'YES', 'scale' => null, 'precision' => null, 'autoincrement' => strpos($tableColumn['extra'], 'auto_increment') !== false, 'comment' => isset($tableColumn['comment']) && $tableColumn['comment'] !== '' ? $tableColumn['comment'] : null];
        if ($scale !== null && $precision !== null) {
            $options['scale'] = (int) $scale;
            $options['precision'] = (int) $precision;
        }
        $column = new Column($tableColumn['field'], Type::getType($type), $options);
        if (isset($tableColumn['characterset'])) {
            $column->setPlatformOption('charset', $tableColumn['characterset']);
        }
        if (isset($tableColumn['collation'])) {
            $column->setPlatformOption('collation', $tableColumn['collation']);
        }
        if (isset($tableColumn['declarationMismatch'])) {
            $column->setPlatformOption('declarationMismatch', $tableColumn['declarationMismatch']);
        }
        // Check underlying database type where doctrine type is inferred from DC2Type comment
        // and set a flag if it is not as expected.
        if ($type === 'json' && $origType !== $type && $this->expectedDbType($type, $options) !== $dbType) {
            $column->setPlatformOption('declarationMismatch', true);
        }
        return $column;
    }
    /**
     * Returns the database data type for a given doctrine type and column
     *
     * Note that for data types that depend on length where length is not part of the column definition
     * and therefore the $tableColumn['length'] will not be set, for example TEXT (which could be LONGTEXT,
     * MEDIUMTEXT) or BLOB (LONGBLOB or TINYBLOB), the expectedDbType cannot be inferred exactly, merely
     * the default type.
     *
     * This method is intended to be used to determine underlying database type where doctrine type is
     * inferred from a DC2Type comment.
     *
     * @param mixed[] $tableColumn
     */
    private function expectedDbType(string $type, array $tableColumn): string
    {
        $_type = Type::getType($type);
        $expectedDbType = strtolower($_type->getSQLDeclaration($tableColumn, $this->_platform));
        $expectedDbType = strtok($expectedDbType, '(), ');
        return $expectedDbType === false ? '' : $expectedDbType;
    }
    /**
     * Return Doctrine/Mysql-compatible column default values for MariaDB 10.2.7+ servers.
     *
     * - Since MariaDb 10.2.7 column defaults stored in information_schema are now quoted
     *   to distinguish them from expressions (see MDEV-10134).
     * - CURRENT_TIMESTAMP, CURRENT_TIME, CURRENT_DATE are stored in information_schema
     *   as current_timestamp(), currdate(), currtime()
     * - Quoted 'NULL' is not enforced by Maria, it is technically possible to have
     *   null in some circumstances (see https://jira.mariadb.org/browse/MDEV-14053)
     * - \' is always stored as '' in information_schema (normalized)
     *
     * @link \https://mariadb.com/kb/en/library/information-schema-columns-table/
     * @link https://jira.mariadb.org/browse/MDEV-13132
     *
     * @param string|null $columnDefault default value as stored in information_schema for MariaDB >= 10.2.7
     */
    private function getMariaDb1027ColumnDefault(MariaDb1027Platform $platform, ?string $columnDefault): ?string
    {
        if ($columnDefault === 'NULL' || $columnDefault === null) {
            return null;
        }
        if (preg_match('/^\'(.*)\'$/', $columnDefault, $matches) === 1) {
            return strtr($matches[1], self::MARIADB_ESCAPE_SEQUENCES);
        }
        switch ($columnDefault) {
            case 'current_timestamp()':
                return $platform->getCurrentTimestampSQL();
            case 'curdate()':
                return $platform->getCurrentDateSQL();
            case 'curtime()':
                return $platform->getCurrentTimeSQL();
        }
        return $columnDefault;
    }
    /**
     * {@inheritDoc}
     */
    protected function _getPortableTableForeignKeysList($tableForeignKeys)
    {
        $list = [];
        foreach ($tableForeignKeys as $value) {
            $value = array_change_key_case($value, CASE_LOWER);
            if (!isset($list[$value['constraint_name']])) {
                if (!isset($value['delete_rule']) || $value['delete_rule'] === 'RESTRICT') {
                    $value['delete_rule'] = null;
                }
                if (!isset($value['update_rule']) || $value['update_rule'] === 'RESTRICT') {
                    $value['update_rule'] = null;
                }
                $list[$value['constraint_name']] = ['name' => $value['constraint_name'], 'local' => [], 'foreign' => [], 'foreignTable' => $value['referenced_table_name'], 'onDelete' => $value['delete_rule'], 'onUpdate' => $value['update_rule']];
            }
            $list[$value['constraint_name']]['local'][] = $value['column_name'];
            $list[$value['constraint_name']]['foreign'][] = $value['referenced_column_name'];
        }
        return parent::_getPortableTableForeignKeysList($list);
    }
    /**
     * {@inheritDoc}
     */
    protected function _getPortableTableForeignKeyDefinition($tableForeignKey): ForeignKeyConstraint
    {
        return new ForeignKeyConstraint($tableForeignKey['local'], $tableForeignKey['foreignTable'], $tableForeignKey['foreign'], $tableForeignKey['name'], ['onDelete' => $tableForeignKey['onDelete'], 'onUpdate' => $tableForeignKey['onUpdate']]);
    }
    public function createComparator(): Comparator
    {
        return new MySQL\Comparator($this->_platform, new CachingCollationMetadataProvider(new ConnectionCollationMetadataProvider($this->_conn)));
    }
    protected function selectTableNames(string $databaseName): Result
    {
        $sql = <<<'SQL'
        SELECT TABLE_NAME
        FROM information_schema.TABLES
        WHERE TABLE_SCHEMA = ?
          AND TABLE_TYPE = 'BASE TABLE'
        ORDER BY TABLE_NAME
        SQL;
        return $this->_conn->executeQuery($sql, [$databaseName]);
    }
    protected function selectTableColumns(string $databaseName, ?string $tableName = null): Result
    {
        // @todo 4.0 - call getColumnTypeSQLSnippet() instead
        [$columnTypeSQL, $joinCheckConstraintSQL] = $this->_platform->getColumnTypeSQLSnippets('c', $databaseName);
        $sql = 'SELECT';
        if ($tableName === null) {
            $sql .= ' c.TABLE_NAME,';
        }
        $sql .= <<<SQL
               c.COLUMN_NAME        AS field,
               {$columnTypeSQL}       AS type,
               c.IS_NULLABLE        AS `null`,
               c.COLUMN_KEY         AS `key`,
               c.COLUMN_DEFAULT     AS `default`,
               c.EXTRA,
               c.COLUMN_COMMENT     AS comment,
               c.CHARACTER_SET_NAME AS characterset,
               c.COLLATION_NAME     AS collation
        FROM information_schema.COLUMNS c
            INNER JOIN information_schema.TABLES t
                ON t.TABLE_NAME = c.TABLE_NAME
            {$joinCheckConstraintSQL}
        SQL;
        // The schema name is passed multiple times as a literal in the WHERE clause instead of using a JOIN condition
        // in order to avoid performance issues on MySQL older than 8.0 and the corresponding MariaDB versions
        // caused by https://bugs.mysql.com/bug.php?id=81347
        $conditions = ['c.TABLE_SCHEMA = ?', 't.TABLE_SCHEMA = ?', "t.TABLE_TYPE = 'BASE TABLE'"];
        $params = [$databaseName, $databaseName];
        if ($tableName !== null) {
            $conditions[] = 't.TABLE_NAME = ?';
            $params[] = $tableName;
        }
        $sql .= ' WHERE ' . implode(' AND ', $conditions) . ' ORDER BY ORDINAL_POSITION';
        return $this->_conn->executeQuery($sql, $params);
    }
    protected function selectIndexColumns(string $databaseName, ?string $tableName = null): Result
    {
        $sql = 'SELECT';
        if ($tableName === null) {
            $sql .= ' TABLE_NAME,';
        }
        $sql .= <<<'SQL'
                NON_UNIQUE  AS Non_Unique,
                INDEX_NAME  AS Key_name,
                COLUMN_NAME AS Column_Name,
                SUB_PART    AS Sub_Part,
                INDEX_TYPE  AS Index_Type
        FROM information_schema.STATISTICS
        SQL;
        $conditions = ['TABLE_SCHEMA = ?'];
        $params = [$databaseName];
        if ($tableName !== null) {
            $conditions[] = 'TABLE_NAME = ?';
            $params[] = $tableName;
        }
        $sql .= ' WHERE ' . implode(' AND ', $conditions) . ' ORDER BY SEQ_IN_INDEX';
        return $this->_conn->executeQuery($sql, $params);
    }
    protected function selectForeignKeyColumns(string $databaseName, ?string $tableName = null): Result
    {
        $sql = 'SELECT DISTINCT';
        if ($tableName === null) {
            $sql .= ' k.TABLE_NAME,';
        }
        $sql .= <<<'SQL'
                    k.CONSTRAINT_NAME,
                    k.COLUMN_NAME,
                    k.REFERENCED_TABLE_NAME,
                    k.REFERENCED_COLUMN_NAME,
                    k.ORDINAL_POSITION /*!50116,
                    c.UPDATE_RULE,
                    c.DELETE_RULE */
        FROM information_schema.key_column_usage k /*!50116
        INNER JOIN information_schema.referential_constraints c
        ON c.CONSTRAINT_NAME = k.CONSTRAINT_NAME
        AND c.TABLE_NAME = k.TABLE_NAME */
        SQL;
        $conditions = ['k.TABLE_SCHEMA = ?'];
        $params = [$databaseName];
        if ($tableName !== null) {
            $conditions[] = 'k.TABLE_NAME = ?';
            $params[] = $tableName;
        }
        $conditions[] = 'k.REFERENCED_COLUMN_NAME IS NOT NULL';
        $sql .= ' WHERE ' . implode(' AND ', $conditions) . ' /*!50116 AND c.CONSTRAINT_SCHEMA = ' . $this->_conn->quote($databaseName) . ' */' . ' ORDER BY k.ORDINAL_POSITION';
        return $this->_conn->executeQuery($sql, $params);
    }
    /**
     * {@inheritDoc}
     */
    protected function fetchTableOptionsByTable(string $databaseName, ?string $tableName = null): array
    {
        $sql = $this->_platform->fetchTableOptionsByTable($tableName !== null);
        $params = [$databaseName];
        if ($tableName !== null) {
            $params[] = $tableName;
        }
        /** @var array<string,array<string,mixed>> $metadata */
        $metadata = $this->_conn->executeQuery($sql, $params)->fetchAllAssociativeIndexed();
        $tableOptions = [];
        foreach ($metadata as $table => $data) {
            $data = array_change_key_case($data, CASE_LOWER);
            $tableOptions[$table] = ['engine' => $data['engine'], 'collation' => $data['table_collation'], 'charset' => $data['character_set_name'], 'autoincrement' => $data['auto_increment'], 'comment' => $data['table_comment'], 'create_options' => $this->parseCreateOptions($data['create_options'])];
        }
        return $tableOptions;
    }
    /** @return string[]|true[] */
    private function parseCreateOptions(?string $string): array
    {
        $options = [];
        if ($string === null || $string === '') {
            return $options;
        }
        foreach (explode(' ', $string) as $pair) {
            $parts = explode('=', $pair, 2);
            $options[$parts[0]] = $parts[1] ?? true;
        }
        return $options;
    }
}