module.exports = Self => {
    Self.remoteMethod('getI18nTables', {
        description: 'Return tables with name end with i18n',
        accessType: 'READ',
        accepts: [],
        returns: {
            type: 'Array',
            root: true
        },
        http: {
            path: `/get-i18n-tables`,
            verb: 'GET'
        }
    });

    Self.getI18nTables = async() => {
        const tables = await Self.rawSql(`
            SELECT c.table_name tableName, c.column_name primaryKey
                FROM information_schema.columns c
                WHERE
                    c.table_name LIKE '%i18n'
                    AND c.COLUMN_KEY = 'PRI'
                    AND c.column_name <> 'id'
                    AND c.COLUMN_NAME <> 'lang'`);

        const columns = await Self.rawSql(`
            SELECT c.table_name tableName, c.column_name field
                FROM information_schema.columns c
                WHERE
                    c.table_name LIKE '%i18n'
                    AND c.COLUMN_KEY <> 'PRI'
                    AND c.column_name <> 'id'
            `);

        for (const column of columns)
            tables.find(t => t.tableName == column.tableName).field = column.field;
        return tables;
    };
};