const { driverBase } = global.DBGATE_TOOLS;
const { mysqlSplitterOptions } = require('dbgate-query-splitter/lib/options');
const Dumper = require('./Dumper');

const spatialTypes = [
  'POINT',
  'LINESTRING',
  'POLYGON',
  'GEOMETRY',
  'MULTIPOINT',
  'MULTILINESTRING',
  'MULTIPOLYGON',
  'GEOMCOLLECTION',
  'GEOMETRYCOLLECTION',
];

/** @type {import('dbgate-types').SqlDialect} */
const dialect = {
  rangeSelect: true,
  stringEscapeChar: '\\',
  fallbackDataType: 'longtext',
  enableConstraintsPerTable: false,
  anonymousPrimaryKey: true,
  explicitDropConstraint: true,
  quoteIdentifier(s) {
    return '`' + s + '`';
  },

  createColumn: true,
  dropColumn: true,
  changeColumn: true,
  createIndex: true,
  dropIndex: true,
  createForeignKey: true,
  dropForeignKey: true,
  createPrimaryKey: true,
  dropPrimaryKey: true,
  dropIndexContainsTableSpec: true,
  createUnique: true,
  dropUnique: true,
  createCheck: true,
  dropCheck: true,

  dropReferencesWhenDropTable: false,
  requireStandaloneSelectForScopeIdentity: true,

  columnProperties: {
    columnComment: true,
    isUnsigned: true,
    isZerofill: true,
  },

  predefinedDataTypes: [
    'char(20)',
    'varchar(250)',
    'binary(250)',
    'varbinary(250)',
    'tinyblob',
    'tinytext',
    'text(1000)',
    'blob(1000)',
    'mediumtext',
    'mediumblob',
    'longtext',
    'longblob',
    "enum('val1','val2','val3')",
    "set('val1','val2','val3')",
    'bit(32)',
    'tinyint',
    'bool',
    'smallint',
    'mediumint',
    'int',
    'bigint',
    'float',
    'double',
    'decimal',
    'date',
    'datetime',
    'timestamp',
    'time',
    'year',
  ],

  createColumnViewExpression(columnName, dataType, source, alias) {
    if (dataType && spatialTypes.includes(dataType.toUpperCase())) {
      return {
        exprType: 'call',
        func: 'ST_AsText',
        alias: alias || columnName,
        args: [
          {
            exprType: 'column',
            columnName,
            source,
          },
        ],
      };
    }
  },
};

const mysqlDriverBase = {
  ...driverBase,
  showConnectionField: (field, values) =>
    ['authType', 'user', 'password', 'defaultDatabase', 'singleDatabase', 'isReadOnly'].includes(field) ||
    (values.authType == 'socket' && ['socketPath'].includes(field)) ||
    (values.authType != 'socket' && ['server', 'port'].includes(field)),
  dumperClass: Dumper,
  dialect,
  defaultPort: 3306,
  getQuerySplitterOptions: usage =>
    usage == 'editor'
      ? { ...mysqlSplitterOptions, ignoreComments: true, preventSingleLineSplit: true }
      : mysqlSplitterOptions,

  readOnlySessions: true,
  supportsDatabaseDump: true,
  authTypeLabel: 'Connection mode',
  defaultAuthTypeName: 'hostPort',
  defaultSocketPath: '/var/run/mysqld/mysqld.sock',

  getNewObjectTemplates() {
    return [
      { label: 'New view', sql: 'CREATE VIEW myview\nAS\nSELECT * FROM table1' },
      {
        label: 'New procedure',
        sql: 'DELIMITER //\n\nCREATE PROCEDURE myproc (IN arg1 INT)\nBEGIN\n  SELECT * FROM table1;\nEND\n\nDELIMITER ;',
      },
      { label: 'New function', sql: 'CREATE FUNCTION myfunc (arg1 INT)\nRETURNS INT DETERMINISTIC\nRETURN 1' },
    ];
  },
};

/** @type {import('dbgate-types').EngineDriver} */
const mysqlDriver = {
  ...mysqlDriverBase,
  engine: 'mysql@dbgate-plugin-mysql',
  title: 'MySQL',
  __analyserInternals: {
    quoteDefaultValues: true,
  },
};

/** @type {import('dbgate-types').EngineDriver} */
const mariaDriver = {
  ...mysqlDriverBase,
  engine: 'mariadb@dbgate-plugin-mysql',
  title: 'MariaDB',
  __analyserInternals: {
    quoteDefaultValues: false,
  },
};

module.exports = [mysqlDriver, mariaDriver];