import { ConnectionIsNotSetError } from "../../error/ConnectionIsNotSetError";
import { DriverPackageNotInstalledError } from "../../error/DriverPackageNotInstalledError";
import { DriverUtils } from "../DriverUtils";
import { SqlServerQueryRunner } from "./SqlServerQueryRunner";
import { DateUtils } from "../../util/DateUtils";
import { PlatformTools } from "../../platform/PlatformTools";
import { RdbmsSchemaBuilder } from "../../schema-builder/RdbmsSchemaBuilder";
import { MssqlParameter } from "./MssqlParameter";
import { TableColumn } from "../../schema-builder/table/TableColumn";
import { OrmUtils } from "../../util/OrmUtils";
import { ApplyValueTransformers } from "../../util/ApplyValueTransformers";
import { TypeORMError } from "../../error";
import { InstanceChecker } from "../../util/InstanceChecker";
import { FindOperator } from "../../find-options/FindOperator";
/**
 * Organizes communication with SQL Server DBMS.
 */
export class SqlServerDriver {
    // -------------------------------------------------------------------------
    // Constructor
    // -------------------------------------------------------------------------
    constructor(connection) {
        /**
         * Pool for slave databases.
         * Used in replication.
         */
        this.slaves = [];
        /**
         * Indicates if replication is enabled.
         */
        this.isReplicated = false;
        /**
         * Indicates if tree tables are supported by this driver.
         */
        this.treeSupport = true;
        /**
         * Represent transaction support by this driver
         */
        this.transactionSupport = "simple";
        /**
         * Gets list of supported column data types by a driver.
         *
         * @see https://docs.microsoft.com/en-us/sql/t-sql/data-types/data-types-transact-sql
         */
        this.supportedDataTypes = [
            "int",
            "bigint",
            "bit",
            "decimal",
            "money",
            "numeric",
            "smallint",
            "smallmoney",
            "tinyint",
            "float",
            "real",
            "date",
            "datetime2",
            "datetime",
            "datetimeoffset",
            "smalldatetime",
            "time",
            "char",
            "varchar",
            "text",
            "nchar",
            "nvarchar",
            "ntext",
            "binary",
            "image",
            "varbinary",
            "hierarchyid",
            "sql_variant",
            "timestamp",
            "uniqueidentifier",
            "xml",
            "geometry",
            "geography",
            "rowversion",
            "vector",
        ];
        /**
         * Returns type of upsert supported by driver if any
         */
        this.supportedUpsertTypes = ["merge-into"];
        /**
         * Gets list of spatial column data types.
         */
        this.spatialTypes = ["geometry", "geography"];
        /**
         * Gets list of column data types that support length by a driver.
         */
        this.withLengthColumnTypes = [
            "char",
            "varchar",
            "nchar",
            "nvarchar",
            "binary",
            "varbinary",
            "vector",
        ];
        /**
         * Gets list of column data types that support precision by a driver.
         */
        this.withPrecisionColumnTypes = [
            "decimal",
            "numeric",
            "time",
            "datetime2",
            "datetimeoffset",
        ];
        /**
         * Gets list of column data types that support scale by a driver.
         */
        this.withScaleColumnTypes = ["decimal", "numeric"];
        /**
         * Orm has special columns and we need to know what database column types should be for those types.
         * Column types are driver dependant.
         */
        this.mappedDataTypes = {
            createDate: "datetime2",
            createDateDefault: "getdate()",
            updateDate: "datetime2",
            updateDateDefault: "getdate()",
            deleteDate: "datetime2",
            deleteDateNullable: true,
            version: "int",
            treeLevel: "int",
            migrationId: "int",
            migrationName: "varchar",
            migrationTimestamp: "bigint",
            cacheId: "int",
            cacheIdentifier: "nvarchar",
            cacheTime: "bigint",
            cacheDuration: "int",
            cacheQuery: "nvarchar(MAX)",
            cacheResult: "nvarchar(MAX)",
            metadataType: "varchar",
            metadataDatabase: "varchar",
            metadataSchema: "varchar",
            metadataTable: "varchar",
            metadataName: "varchar",
            metadataValue: "nvarchar(MAX)",
        };
        /**
         * The prefix used for the parameters
         */
        this.parametersPrefix = "@";
        /**
         * Default values of length, precision and scale depends on column data type.
         * Used in the cases when length/precision/scale is not specified by user.
         */
        this.dataTypeDefaults = {
            char: { length: 1 },
            nchar: { length: 1 },
            varchar: { length: 255 },
            nvarchar: { length: 255 },
            binary: { length: 1 },
            varbinary: { length: 1 },
            decimal: { precision: 18, scale: 0 },
            numeric: { precision: 18, scale: 0 },
            time: { precision: 7 },
            datetime2: { precision: 7 },
            datetimeoffset: { precision: 7 },
            vector: { length: 255 }, // default length if not provided a value
        };
        this.cteCapabilities = {
            enabled: true,
            // todo: enable it for SQL Server - it's partially supported, but there are issues with generation of non-standard OUTPUT clause
            writable: false,
        };
        /**
         * Max length allowed by MSSQL Server for aliases (identifiers).
         * @see https://docs.microsoft.com/en-us/sql/sql-server/maximum-capacity-specifications-for-sql-server
         */
        this.maxAliasLength = 128;
        this.connection = connection;
        this.options = connection.options;
        this.isReplicated = this.options.replication ? true : false;
        // load mssql package
        this.loadDependencies();
        this.database = DriverUtils.buildDriverOptions(this.options.replication
            ? this.options.replication.master
            : this.options).database;
        this.schema = DriverUtils.buildDriverOptions(this.options).schema;
        // Object.assign(connection.options, DriverUtils.buildDriverOptions(connection.options)); // todo: do it better way
        // validate options to make sure everything is set
        // if (!this.options.host)
        // throw new DriverOptionNotSetError("host");
        // if (!this.options.username)
        //     throw new DriverOptionNotSetError("username");
        // if (!this.options.database)
        //     throw new DriverOptionNotSetError("database");
    }
    // -------------------------------------------------------------------------
    // Public Implemented Methods
    // -------------------------------------------------------------------------
    /**
     * Performs connection to the database.
     * Based on pooling options, it can either create connection immediately,
     * either create a pool and create connection when needed.
     */
    async connect() {
        if (this.options.replication) {
            this.slaves = await Promise.all(this.options.replication.slaves.map((slave) => {
                return this.createPool(this.options, slave);
            }));
            this.master = await this.createPool(this.options, this.options.replication.master);
        }
        else {
            this.master = await this.createPool(this.options, this.options);
        }
        if (!this.database || !this.searchSchema) {
            const queryRunner = this.createQueryRunner("master");
            if (!this.database) {
                this.database = await queryRunner.getCurrentDatabase();
            }
            if (!this.searchSchema) {
                this.searchSchema = await queryRunner.getCurrentSchema();
            }
            await queryRunner.release();
        }
        if (!this.schema) {
            this.schema = this.searchSchema;
        }
    }
    /**
     * Makes any action after connection (e.g. create extensions in Postgres driver).
     */
    afterConnect() {
        return Promise.resolve();
    }
    /**
     * Closes connection with the database.
     */
    async disconnect() {
        if (!this.master) {
            throw new ConnectionIsNotSetError("mssql");
        }
        await this.closePool(this.master);
        await Promise.all(this.slaves.map((slave) => this.closePool(slave)));
        this.master = undefined;
        this.slaves = [];
    }
    /**
     * Closes connection pool.
     */
    async closePool(pool) {
        return new Promise((ok, fail) => {
            pool.close((err) => (err ? fail(err) : ok()));
        });
    }
    /**
     * Creates a schema builder used to build and sync a schema.
     */
    createSchemaBuilder() {
        return new RdbmsSchemaBuilder(this.connection);
    }
    /**
     * Creates a query runner used to execute database queries.
     */
    createQueryRunner(mode) {
        return new SqlServerQueryRunner(this, mode);
    }
    /**
     * Replaces parameters in the given sql with special escaping character
     * and an array of parameter names to be passed to a query.
     */
    escapeQueryWithParameters(sql, parameters, nativeParameters) {
        const escapedParameters = Object.keys(nativeParameters).map((key) => nativeParameters[key]);
        if (!parameters || !Object.keys(parameters).length)
            return [sql, escapedParameters];
        const parameterIndexMap = new Map();
        sql = sql.replace(/:(\.\.\.)?([A-Za-z0-9_.]+)/g, (full, isArray, key) => {
            if (!parameters.hasOwnProperty(key)) {
                return full;
            }
            if (parameterIndexMap.has(key)) {
                return this.parametersPrefix + parameterIndexMap.get(key);
            }
            const value = parameters[key];
            if (isArray) {
                return value
                    .map((v) => {
                    escapedParameters.push(v);
                    return this.createParameter(key, escapedParameters.length - 1);
                })
                    .join(", ");
            }
            if (typeof value === "function") {
                return value();
            }
            escapedParameters.push(value);
            parameterIndexMap.set(key, escapedParameters.length - 1);
            return this.createParameter(key, escapedParameters.length - 1);
        }); // todo: make replace only in value statements, otherwise problems
        return [sql, escapedParameters];
    }
    /**
     * Escapes a column name.
     */
    escape(columnName) {
        return `"${columnName}"`;
    }
    /**
     * Build full table name with database name, schema name and table name.
     * E.g. myDB.mySchema.myTable
     */
    buildTableName(tableName, schema, database) {
        const tablePath = [tableName];
        if (schema) {
            tablePath.unshift(schema);
        }
        if (database) {
            if (!schema) {
                tablePath.unshift("");
            }
            tablePath.unshift(database);
        }
        return tablePath.join(".");
    }
    /**
     * Parse a target table name or other types and return a normalized table definition.
     */
    parseTableName(target) {
        const driverDatabase = this.database;
        const driverSchema = this.schema;
        if (InstanceChecker.isTable(target) || InstanceChecker.isView(target)) {
            const parsed = this.parseTableName(target.name);
            return {
                database: target.database || parsed.database || driverDatabase,
                schema: target.schema || parsed.schema || driverSchema,
                tableName: parsed.tableName,
            };
        }
        if (InstanceChecker.isTableForeignKey(target)) {
            const parsed = this.parseTableName(target.referencedTableName);
            return {
                database: target.referencedDatabase ||
                    parsed.database ||
                    driverDatabase,
                schema: target.referencedSchema || parsed.schema || driverSchema,
                tableName: parsed.tableName,
            };
        }
        if (InstanceChecker.isEntityMetadata(target)) {
            // EntityMetadata tableName is never a path
            return {
                database: target.database || driverDatabase,
                schema: target.schema || driverSchema,
                tableName: target.tableName,
            };
        }
        const parts = target.split(".");
        if (parts.length === 3) {
            return {
                database: parts[0] || driverDatabase,
                schema: parts[1] || driverSchema,
                tableName: parts[2],
            };
        }
        else if (parts.length === 2) {
            return {
                database: driverDatabase,
                schema: parts[0],
                tableName: parts[1],
            };
        }
        else {
            return {
                database: driverDatabase,
                schema: driverSchema,
                tableName: target,
            };
        }
    }
    /**
     * Prepares given value to a value to be persisted, based on its column type and metadata.
     */
    preparePersistentValue(value, columnMetadata) {
        if (columnMetadata.transformer)
            value = ApplyValueTransformers.transformTo(columnMetadata.transformer, value);
        if (value === null || value === undefined)
            return value;
        if (columnMetadata.type === Boolean) {
            return value === true ? 1 : 0;
        }
        else if (columnMetadata.type === "date") {
            return DateUtils.mixedDateToDate(value, columnMetadata.utc);
        }
        else if (columnMetadata.type === "time") {
            return DateUtils.mixedTimeToDate(value);
        }
        else if (columnMetadata.type === "datetime" ||
            columnMetadata.type === "smalldatetime" ||
            columnMetadata.type === Date) {
            return DateUtils.mixedDateToDate(value, false, false);
        }
        else if (columnMetadata.type === "datetime2" ||
            columnMetadata.type === "datetimeoffset") {
            return DateUtils.mixedDateToDate(value, false, true);
        }
        else if (columnMetadata.type === "simple-array") {
            return DateUtils.simpleArrayToString(value);
        }
        else if (columnMetadata.type === "simple-json") {
            return DateUtils.simpleJsonToString(value);
        }
        else if (columnMetadata.type === "simple-enum") {
            return DateUtils.simpleEnumToString(value);
        }
        else if (columnMetadata.type === "vector") {
            if (Array.isArray(value)) {
                return JSON.stringify(value);
            }
            else {
                return value;
            }
        }
        return value;
    }
    /**
     * Prepares given value to a value to be persisted, based on its column type or metadata.
     */
    prepareHydratedValue(value, columnMetadata) {
        if (value === null || value === undefined)
            return columnMetadata.transformer
                ? ApplyValueTransformers.transformFrom(columnMetadata.transformer, value)
                : value;
        if (columnMetadata.type === Boolean) {
            value = value ? true : false;
        }
        else if (columnMetadata.type === "datetime" ||
            columnMetadata.type === Date ||
            columnMetadata.type === "datetime2" ||
            columnMetadata.type === "smalldatetime" ||
            columnMetadata.type === "datetimeoffset") {
            value = DateUtils.normalizeHydratedDate(value);
        }
        else if (columnMetadata.type === "date") {
            value = DateUtils.mixedDateToDateString(value, {
                utc: columnMetadata.utc,
            });
        }
        else if (columnMetadata.type === "time") {
            value = DateUtils.mixedTimeToString(value);
        }
        else if (columnMetadata.type === "simple-array") {
            value = DateUtils.stringToSimpleArray(value);
        }
        else if (columnMetadata.type === "simple-json") {
            value = DateUtils.stringToSimpleJson(value);
        }
        else if (columnMetadata.type === "simple-enum") {
            value = DateUtils.stringToSimpleEnum(value, columnMetadata);
        }
        else if (columnMetadata.type === "vector") {
            if (typeof value === "string") {
                try {
                    value = JSON.parse(value);
                }
                catch (e) {
                    // If parsing fails, return the value as-is
                }
            }
        }
        else if (columnMetadata.type === Number) {
            // convert to number if number
            value = !isNaN(+value) ? parseInt(value) : value;
        }
        if (columnMetadata.transformer)
            value = ApplyValueTransformers.transformFrom(columnMetadata.transformer, value);
        return value;
    }
    /**
     * Creates a database type from a given column metadata.
     */
    normalizeType(column) {
        if (column.type === Number || column.type === "integer") {
            return "int";
        }
        else if (column.type === String) {
            return "nvarchar";
        }
        else if (column.type === Date) {
            return "datetime";
        }
        else if (column.type === Boolean) {
            return "bit";
        }
        else if (column.type === Buffer) {
            return "binary";
        }
        else if (column.type === "uuid") {
            return "uniqueidentifier";
        }
        else if (column.type === "simple-array" ||
            column.type === "simple-json") {
            return "ntext";
        }
        else if (column.type === "simple-enum") {
            return "nvarchar";
        }
        else if (column.type === "dec") {
            return "decimal";
        }
        else if (column.type === "double precision") {
            return "float";
        }
        else if (column.type === "rowversion") {
            return "timestamp"; // the rowversion type's name in SQL server metadata is timestamp
        }
        else {
            return column.type || "";
        }
    }
    /**
     * Normalizes "default" value of the column.
     */
    normalizeDefault(columnMetadata) {
        const defaultValue = columnMetadata.default;
        if (typeof defaultValue === "number") {
            return `${defaultValue}`;
        }
        if (typeof defaultValue === "boolean") {
            return defaultValue ? "1" : "0";
        }
        if (typeof defaultValue === "function") {
            const value = defaultValue();
            if (value.toUpperCase() === "CURRENT_TIMESTAMP") {
                return "getdate()";
            }
            return value;
        }
        if (typeof defaultValue === "string") {
            return `'${defaultValue}'`;
        }
        if (defaultValue === undefined || defaultValue === null) {
            return undefined;
        }
        return `${defaultValue}`;
    }
    /**
     * Normalizes "isUnique" value of the column.
     */
    normalizeIsUnique(column) {
        return column.entityMetadata.uniques.some((uq) => uq.columns.length === 1 && uq.columns[0] === column);
    }
    /**
     * Returns default column lengths, which is required on column creation.
     */
    getColumnLength(column) {
        if (column.length)
            return column.length.toString();
        if (column.type === "varchar" ||
            column.type === "nvarchar" ||
            column.type === String)
            return "255";
        return "";
    }
    /**
     * Creates column type definition including length, precision and scale
     */
    createFullType(column) {
        // The Database Engine determines the data type of the computed column by applying the rules
        // of data type precedence to the expressions specified in the formula.
        if (column.asExpression)
            return "";
        let type = column.type;
        // Handle vector type with length (dimensions)
        if (column.type === "vector") {
            type = `vector(${column.length})`;
        }
        // used 'getColumnLength()' method, because SqlServer sets `varchar` and `nvarchar` length to 1 by default.
        else if (this.getColumnLength(column)) {
            type += `(${this.getColumnLength(column)})`;
        }
        else if (column.precision !== null &&
            column.precision !== undefined &&
            column.scale !== null &&
            column.scale !== undefined) {
            type += `(${column.precision},${column.scale})`;
        }
        else if (column.precision !== null &&
            column.precision !== undefined) {
            type += `(${column.precision})`;
        }
        if (column.isArray)
            type += " array";
        return type;
    }
    /**
     * Obtains a new database connection to a master server.
     * Used for replication.
     * If replication is not setup then returns default connection's database connection.
     */
    obtainMasterConnection() {
        if (!this.master) {
            return Promise.reject(new TypeORMError("Driver not Connected"));
        }
        return Promise.resolve(this.master);
    }
    /**
     * Obtains a new database connection to a slave server.
     * Used for replication.
     * If replication is not setup then returns master (default) connection's database connection.
     */
    obtainSlaveConnection() {
        if (!this.slaves.length)
            return this.obtainMasterConnection();
        const random = Math.floor(Math.random() * this.slaves.length);
        return Promise.resolve(this.slaves[random]);
    }
    /**
     * Creates generated map of values generated or returned by database after INSERT query.
     */
    createGeneratedMap(metadata, insertResult) {
        if (!insertResult)
            return undefined;
        return Object.keys(insertResult).reduce((map, key) => {
            const column = metadata.findColumnWithDatabaseName(key);
            if (column) {
                OrmUtils.mergeDeep(map, column.createValueMap(this.prepareHydratedValue(insertResult[key], column)));
            }
            return map;
        }, {});
    }
    /**
     * Differentiate columns of this table and columns from the given column metadatas columns
     * and returns only changed.
     */
    findChangedColumns(tableColumns, columnMetadatas) {
        return columnMetadatas.filter((columnMetadata) => {
            const tableColumn = tableColumns.find((c) => c.name === columnMetadata.databaseName);
            if (!tableColumn)
                return false; // we don't need new columns, we only need exist and changed
            const isColumnChanged = tableColumn.name !== columnMetadata.databaseName ||
                this.compareColumnType(tableColumn, columnMetadata) ||
                this.compareColumnLength(tableColumn, columnMetadata) ||
                tableColumn.precision !== columnMetadata.precision ||
                tableColumn.scale !== columnMetadata.scale ||
                // || tableColumn.comment !== columnMetadata.comment || // todo
                tableColumn.isGenerated !== columnMetadata.isGenerated ||
                (!tableColumn.isGenerated &&
                    this.lowerDefaultValueIfNecessary(this.normalizeDefault(columnMetadata)) !==
                        this.lowerDefaultValueIfNecessary(tableColumn.default)) || // we included check for generated here, because generated columns already can have default values
                tableColumn.isPrimary !== columnMetadata.isPrimary ||
                tableColumn.isNullable !== columnMetadata.isNullable ||
                tableColumn.asExpression !== columnMetadata.asExpression ||
                tableColumn.generatedType !== columnMetadata.generatedType ||
                tableColumn.isUnique !==
                    this.normalizeIsUnique(columnMetadata) ||
                (tableColumn.enum &&
                    columnMetadata.enum &&
                    !OrmUtils.isArraysEqual(tableColumn.enum, columnMetadata.enum.map((val) => val + "")));
            // DEBUG SECTION
            // if (isColumnChanged) {
            //     console.log("table:", columnMetadata.entityMetadata.tableName)
            //     console.log(
            //         "name:",
            //         tableColumn.name,
            //         columnMetadata.databaseName,
            //     )
            //     console.log(
            //         "type:",
            //         tableColumn.type,
            //         this.normalizeType(columnMetadata),
            //         this.compareColumnType(tableColumn, columnMetadata),
            //     )
            //     console.log(
            //         "length:",
            //         tableColumn.length,
            //         columnMetadata.length,
            //         this.compareColumnLength(tableColumn, columnMetadata),
            //     )
            //     console.log(
            //         "precision:",
            //         tableColumn.precision,
            //         columnMetadata.precision,
            //     )
            //     console.log("scale:", tableColumn.scale, columnMetadata.scale)
            //     console.log(
            //         "isGenerated:",
            //         tableColumn.isGenerated,
            //         columnMetadata.isGenerated,
            //     )
            //     console.log(
            //         "isGenerated 2:",
            //         !tableColumn.isGenerated &&
            //             this.lowerDefaultValueIfNecessary(
            //                 this.normalizeDefault(columnMetadata),
            //             ) !==
            //                 this.lowerDefaultValueIfNecessary(
            //                     tableColumn.default,
            //                 ),
            //     )
            //     console.log(
            //         "isPrimary:",
            //         tableColumn.isPrimary,
            //         columnMetadata.isPrimary,
            //     )
            //     console.log(
            //         "isNullable:",
            //         tableColumn.isNullable,
            //         columnMetadata.isNullable,
            //     )
            //     console.log(
            //         "asExpression:",
            //         tableColumn.asExpression,
            //         columnMetadata.asExpression,
            //     )
            //     console.log(
            //         "generatedType:",
            //         tableColumn.generatedType,
            //         columnMetadata.generatedType,
            //     )
            //     console.log(
            //         "isUnique:",
            //         tableColumn.isUnique,
            //         this.normalizeIsUnique(columnMetadata),
            //     )
            //     console.log("==========================================")
            // }
            return isColumnChanged;
        });
    }
    /**
     * Returns true if driver supports RETURNING / OUTPUT statement.
     */
    isReturningSqlSupported() {
        if (this.options.options &&
            this.options.options.disableOutputReturning) {
            return false;
        }
        return true;
    }
    /**
     * Returns true if driver supports uuid values generation on its own.
     */
    isUUIDGenerationSupported() {
        return true;
    }
    /**
     * Returns true if driver supports fulltext indices.
     */
    isFullTextColumnTypeSupported() {
        return false;
    }
    /**
     * Creates an escaped parameter.
     */
    createParameter(parameterName, index) {
        return this.parametersPrefix + index;
    }
    // -------------------------------------------------------------------------
    // Public Methods
    // -------------------------------------------------------------------------
    /**
     * Sql server's parameters needs to be wrapped into special object with type information about this value.
     * This method wraps given value into MssqlParameter based on its column definition.
     */
    parametrizeValue(column, value) {
        // if its already MssqlParameter then simply return it
        if (InstanceChecker.isMssqlParameter(value))
            return value;
        const normalizedType = this.normalizeType({ type: column.type });
        if (column.length) {
            return new MssqlParameter(value, normalizedType, column.length);
        }
        else if (column.precision !== null &&
            column.precision !== undefined &&
            column.scale !== null &&
            column.scale !== undefined) {
            return new MssqlParameter(value, normalizedType, column.precision, column.scale);
        }
        else if (column.precision !== null &&
            column.precision !== undefined) {
            return new MssqlParameter(value, normalizedType, column.precision);
        }
        else if (column.scale !== null && column.scale !== undefined) {
            return new MssqlParameter(value, normalizedType, column.scale);
        }
        return new MssqlParameter(value, normalizedType);
    }
    /**
     * Recursively wraps values (including those inside FindOperators) into MssqlParameter instances,
     * ensuring correct type metadata is passed to the SQL Server driver.
     *
     * - If the value is a FindOperator containing an array, all elements are individually parametrized.
     * - If the value is a non-raw FindOperator, a transformation is applied to its internal value.
     * - Otherwise, the value is passed directly to parametrizeValue for wrapping.
     *
     * This ensures SQL Server receives properly typed parameters for queries involving operators like
     * In, MoreThan, Between, etc.
     */
    parametrizeValues(column, value) {
        if (value instanceof FindOperator) {
            if (value.type !== "raw") {
                value.transformValue({
                    to: (v) => this.parametrizeValues(column, v),
                    from: (v) => v,
                });
            }
            return value;
        }
        return this.parametrizeValue(column, value);
    }
    /**
     * Sql server's parameters needs to be wrapped into special object with type information about this value.
     * This method wraps all values of the given object into MssqlParameter based on their column definitions in the given table.
     */
    parametrizeMap(tablePath, map) {
        // find metadata for the given table
        if (!this.connection.hasMetadata(tablePath))
            // if no metadata found then we can't proceed because we don't have columns and their types
            return map;
        const metadata = this.connection.getMetadata(tablePath);
        return Object.keys(map).reduce((newMap, key) => {
            const value = map[key];
            // find column metadata
            const column = metadata.findColumnWithDatabaseName(key);
            if (!column)
                // if we didn't find a column then we can't proceed because we don't have a column type
                return value;
            newMap[key] = this.parametrizeValue(column, value);
            return newMap;
        }, {});
    }
    buildTableVariableDeclaration(identifier, columns) {
        const outputColumns = columns.map((column) => {
            return `${this.escape(column.databaseName)} ${this.createFullType(new TableColumn({
                name: column.databaseName,
                type: this.normalizeType(column),
                length: column.length,
                isNullable: column.isNullable,
                isArray: column.isArray,
            }))}`;
        });
        return `DECLARE ${identifier} TABLE (${outputColumns.join(", ")})`;
    }
    // -------------------------------------------------------------------------
    // Protected Methods
    // -------------------------------------------------------------------------
    /**
     * If driver dependency is not given explicitly, then try to load it via "require".
     */
    loadDependencies() {
        try {
            const mssql = this.options.driver || PlatformTools.load("mssql");
            this.mssql = mssql;
        }
        catch (e) {
            // todo: better error for browser env
            throw new DriverPackageNotInstalledError("SQL Server", "mssql");
        }
    }
    compareColumnType(tableColumn, columnMetadata) {
        // The Database Engine determines the data type of the computed column by applying the rules
        // of data type precedence to the expressions specified in the formula.
        if (columnMetadata.asExpression)
            return false;
        return tableColumn.type !== this.normalizeType(columnMetadata);
    }
    compareColumnLength(tableColumn, columnMetadata) {
        // The Database Engine determines the data type of the computed column by applying the rules
        // of data type precedence to the expressions specified in the formula.
        if (columnMetadata.asExpression)
            return false;
        return (tableColumn.length.toUpperCase() !==
            this.getColumnLength(columnMetadata).toUpperCase());
    }
    lowerDefaultValueIfNecessary(value) {
        // SqlServer saves function calls in default value as lowercase https://github.com/typeorm/typeorm/issues/2733
        if (!value) {
            return value;
        }
        return value
            .split(`'`)
            .map((v, i) => {
            return i % 2 === 1 ? v : v.toLowerCase();
        })
            .join(`'`);
    }
    /**
     * Creates a new connection pool for a given database credentials.
     */
    createPool(options, credentials) {
        credentials = Object.assign({}, credentials, DriverUtils.buildDriverOptions(credentials)); // todo: do it better way
        // todo: credentials.domain is deprecation. remove it in future
        const authentication = !credentials.domain
            ? credentials.authentication
            : {
                type: "ntlm",
                options: {
                    domain: credentials.domain,
                    userName: credentials.username,
                    password: credentials.password,
                },
            };
        // build connection options for the driver
        const connectionOptions = Object.assign({}, {
            connectionTimeout: this.options.connectionTimeout,
            requestTimeout: this.options.requestTimeout,
            stream: this.options.stream,
            pool: this.options.pool,
            options: this.options.options,
        }, {
            server: credentials.host,
            database: credentials.database,
            port: credentials.port,
            user: credentials.username,
            password: credentials.password,
            authentication: authentication,
        }, options.extra || {});
        // set default useUTC option if it hasn't been set
        if (!connectionOptions.options) {
            connectionOptions.options = { useUTC: false };
        }
        else if (!connectionOptions.options.useUTC) {
            Object.assign(connectionOptions.options, { useUTC: false });
        }
        // Match the next release of tedious for configuration options
        // Also prevents warning messages.
        Object.assign(connectionOptions.options, { enableArithAbort: true });
        // pooling is enabled either when its set explicitly to true,
        // either when its not defined at all (e.g. enabled by default)
        return new Promise((ok, fail) => {
            const pool = new this.mssql.ConnectionPool(connectionOptions);
            const { logger } = this.connection;
            const poolErrorHandler = (options.pool && options.pool.errorHandler) ||
                ((error) => logger.log("warn", `MSSQL pool raised an error. ${error}`));
            /**
             * Attaching an error handler to pool errors is essential, as, otherwise, errors raised will go unhandled and
             * cause the hosting app to crash.
             */
            pool.on("error", poolErrorHandler);
            const connection = pool.connect((err) => {
                if (err)
                    return fail(err);
                ok(connection);
            });
        });
    }
}

//# sourceMappingURL=SqlServerDriver.js.map
