import { OrmUtils } from "../util/OrmUtils";
import { ApplyValueTransformers } from "../util/ApplyValueTransformers";
import { ObjectUtils } from "../util/ObjectUtils";
import { InstanceChecker } from "../util/InstanceChecker";
/**
 * This metadata contains all information about entity's column.
 */
export class ColumnMetadata {
    // ---------------------------------------------------------------------
    // Constructor
    // ---------------------------------------------------------------------
    constructor(options) {
        this["@instanceof"] = Symbol.for("ColumnMetadata");
        /**
         * Type's length in the database.
         */
        this.length = "";
        /**
         * Indicates if this column is a primary key.
         */
        this.isPrimary = false;
        /**
         * Indicates if this column is generated (auto increment or generated other way).
         */
        this.isGenerated = false;
        /**
         * Indicates if column can contain nulls or not.
         */
        this.isNullable = false;
        /**
         * Indicates if column is selected by query builder or not.
         */
        this.isSelect = true;
        /**
         * Indicates if column is inserted by default or not.
         */
        this.isInsert = true;
        /**
         * Indicates if column allows updates or not.
         */
        this.isUpdate = true;
        /**
         * Puts ZEROFILL attribute on to numeric column. Works only for MySQL.
         * If you specify ZEROFILL for a numeric column, MySQL automatically adds the UNSIGNED attribute to the column
         */
        this.zerofill = false;
        /**
         * Puts UNSIGNED attribute on to numeric column. Works only for MySQL.
         */
        this.unsigned = false;
        /**
         * Indicates if this column is an array.
         */
        this.isArray = false;
        /**
         * Indicates if column is virtual. Virtual columns are not mapped to the entity.
         */
        this.isVirtual = false;
        /**
         * Indicates if column is discriminator. Discriminator columns are not mapped to the entity.
         */
        this.isDiscriminator = false;
        /**
         * Indicates if column is tree-level column. Tree-level columns are used in closure entities.
         */
        this.isTreeLevel = false;
        /**
         * Indicates if this column contains an entity creation date.
         */
        this.isCreateDate = false;
        /**
         * Indicates if this column contains an entity update date.
         */
        this.isUpdateDate = false;
        /**
         * Indicates if this column contains an entity delete date.
         */
        this.isDeleteDate = false;
        /**
         * Indicates if this column contains an entity version.
         */
        this.isVersion = false;
        /**
         * Indicates if this column contains an object id.
         */
        this.isObjectId = false;
        /**
         * Indicates if this column is nested set's left column.
         * Used only in tree entities with nested-set type.
         */
        this.isNestedSetLeft = false;
        /**
         * Indicates if this column is nested set's right column.
         * Used only in tree entities with nested-set type.
         */
        this.isNestedSetRight = false;
        /**
         * Indicates if this column is materialized path's path column.
         * Used only in tree entities with materialized path type.
         */
        this.isMaterializedPath = false;
        this.entityMetadata = options.entityMetadata;
        this.embeddedMetadata = options.embeddedMetadata;
        this.referencedColumn = options.referencedColumn;
        if (options.args.target)
            this.target = options.args.target;
        if (options.args.propertyName)
            this.propertyName = options.args.propertyName;
        if (options.args.options.name)
            this.givenDatabaseName = options.args.options.name;
        if (options.args.options.type)
            this.type = options.args.options.type;
        if (options.args.options.length)
            this.length = options.args.options.length ? options.args.options.length.toString() : "";
        if (options.args.options.width)
            this.width = options.args.options.width;
        if (options.args.options.charset)
            this.charset = options.args.options.charset;
        if (options.args.options.collation)
            this.collation = options.args.options.collation;
        if (options.args.options.primary)
            this.isPrimary = options.args.options.primary;
        if (options.args.options.default === null) // to make sure default: null is the same as nullable: true
            this.isNullable = true;
        if (options.args.options.nullable !== undefined)
            this.isNullable = options.args.options.nullable;
        if (options.args.options.select !== undefined)
            this.isSelect = options.args.options.select;
        if (options.args.options.insert !== undefined)
            this.isInsert = options.args.options.insert;
        if (options.args.options.update !== undefined)
            this.isUpdate = options.args.options.update;
        if (options.args.options.readonly !== undefined)
            this.isUpdate = !options.args.options.readonly;
        if (options.args.options.comment)
            this.comment = options.args.options.comment;
        if (options.args.options.default !== undefined)
            this.default = options.args.options.default;
        if (options.args.options.onUpdate)
            this.onUpdate = options.args.options.onUpdate;
        if (options.args.options.generatedIdentity)
            this.generatedIdentity = options.args.options.generatedIdentity;
        if (options.args.options.scale !== null && options.args.options.scale !== undefined)
            this.scale = options.args.options.scale;
        if (options.args.options.zerofill) {
            this.zerofill = options.args.options.zerofill;
            this.unsigned = true; // if you specify ZEROFILL for a numeric column, MySQL automatically adds the UNSIGNED attribute to the column
        }
        if (options.args.options.unsigned)
            this.unsigned = options.args.options.unsigned;
        if (options.args.options.precision !== null)
            this.precision = options.args.options.precision;
        if (options.args.options.enum) {
            if (ObjectUtils.isObject(options.args.options.enum) && !Array.isArray(options.args.options.enum)) {
                this.enum = Object.keys(options.args.options.enum)
                    // remove numeric keys - typescript numeric enum types generate them
                    // From the documentation: “declaration merging” means that the compiler merges two separate declarations
                    // declared with the same name into a single definition. This concept is often used to merge enum with namespace
                    // where in namespace we define e.g. utility methods for creating enum. This is well known in other languages
                    // like Java (enum methods). Here in case if enum have function, we need to remove it from metadata, otherwise
                    // generated SQL statements contains string representation of that function which leads into syntax error
                    // at database side.
                    .filter(key => isNaN(+key) && typeof options.args.options.enum[key] !== "function")
                    .map(key => options.args.options.enum[key]);
            }
            else {
                this.enum = options.args.options.enum;
            }
        }
        if (options.args.options.enumName) {
            this.enumName = options.args.options.enumName;
        }
        if (options.args.options.asExpression) {
            this.asExpression = options.args.options.asExpression;
            this.generatedType = options.args.options.generatedType ? options.args.options.generatedType : "VIRTUAL";
        }
        if (options.args.options.hstoreType)
            this.hstoreType = options.args.options.hstoreType;
        if (options.args.options.array)
            this.isArray = options.args.options.array;
        if (options.args.mode) {
            this.isVirtual = options.args.mode === "virtual";
            this.isTreeLevel = options.args.mode === "treeLevel";
            this.isCreateDate = options.args.mode === "createDate";
            this.isUpdateDate = options.args.mode === "updateDate";
            this.isDeleteDate = options.args.mode === "deleteDate";
            this.isVersion = options.args.mode === "version";
            this.isObjectId = options.args.mode === "objectId";
        }
        if (options.args.options.transformer)
            this.transformer = options.args.options.transformer;
        if (options.args.options.spatialFeatureType)
            this.spatialFeatureType = options.args.options.spatialFeatureType;
        if (options.args.options.srid !== undefined)
            this.srid = options.args.options.srid;
        if (this.isTreeLevel)
            this.type = options.connection.driver.mappedDataTypes.treeLevel;
        if (this.isCreateDate) {
            if (!this.type)
                this.type = options.connection.driver.mappedDataTypes.createDate;
            if (!this.default)
                this.default = () => options.connection.driver.mappedDataTypes.createDateDefault;
            // skip precision if it was explicitly set to "null" in column options. Otherwise use default precision if it exist.
            if (this.precision === undefined && options.args.options.precision === undefined && options.connection.driver.mappedDataTypes.createDatePrecision)
                this.precision = options.connection.driver.mappedDataTypes.createDatePrecision;
        }
        if (this.isUpdateDate) {
            if (!this.type)
                this.type = options.connection.driver.mappedDataTypes.updateDate;
            if (!this.default)
                this.default = () => options.connection.driver.mappedDataTypes.updateDateDefault;
            if (!this.onUpdate)
                this.onUpdate = options.connection.driver.mappedDataTypes.updateDateDefault;
            // skip precision if it was explicitly set to "null" in column options. Otherwise use default precision if it exist.
            if (this.precision === undefined && options.args.options.precision === undefined && options.connection.driver.mappedDataTypes.updateDatePrecision)
                this.precision = options.connection.driver.mappedDataTypes.updateDatePrecision;
        }
        if (this.isDeleteDate) {
            if (!this.type)
                this.type = options.connection.driver.mappedDataTypes.deleteDate;
            if (!this.isNullable)
                this.isNullable = options.connection.driver.mappedDataTypes.deleteDateNullable;
            // skip precision if it was explicitly set to "null" in column options. Otherwise use default precision if it exist.
            if (this.precision === undefined && options.args.options.precision === undefined && options.connection.driver.mappedDataTypes.deleteDatePrecision)
                this.precision = options.connection.driver.mappedDataTypes.deleteDatePrecision;
        }
        if (this.isVersion)
            this.type = options.connection.driver.mappedDataTypes.version;
        if (options.closureType)
            this.closureType = options.closureType;
        if (options.nestedSetLeft)
            this.isNestedSetLeft = options.nestedSetLeft;
        if (options.nestedSetRight)
            this.isNestedSetRight = options.nestedSetRight;
        if (options.materializedPath)
            this.isMaterializedPath = options.materializedPath;
    }
    // ---------------------------------------------------------------------
    // Public Methods
    // ---------------------------------------------------------------------
    /**
     * Creates entity id map from the given entity ids array.
     */
    createValueMap(value, useDatabaseName = false) {
        // extract column value from embeds of entity if column is in embedded
        if (this.embeddedMetadata) {
            // example: post[data][information][counters].id where "data", "information" and "counters" are embeddeds
            // we need to get value of "id" column from the post real entity object and return it in a
            // { data: { information: { counters: { id: ... } } } } format
            // first step - we extract all parent properties of the entity relative to this column, e.g. [data, information, counters]
            const propertyNames = [...this.embeddedMetadata.parentPropertyNames];
            // now need to access post[data][information][counters] to get column value from the counters
            // and on each step we need to create complex literal object, e.g. first { data },
            // then { data: { information } }, then { data: { information: { counters } } },
            // then { data: { information: { counters: [this.propertyName]: entity[data][information][counters][this.propertyName] } } }
            // this recursive function helps doing that
            const extractEmbeddedColumnValue = (propertyNames, map) => {
                const propertyName = propertyNames.shift();
                if (propertyName) {
                    map[propertyName] = {};
                    extractEmbeddedColumnValue(propertyNames, map[propertyName]);
                    return map;
                }
                // this is bugfix for #720 when increment number is bigint we need to make sure its a string
                if ((this.generationStrategy === "increment" || this.generationStrategy === "rowid") && this.type === "bigint" && value !== null)
                    value = String(value);
                map[useDatabaseName ? this.databaseName : this.propertyName] = value;
                return map;
            };
            return extractEmbeddedColumnValue(propertyNames, {});
        }
        else { // no embeds - no problems. Simply return column property name and its value of the entity
            // this is bugfix for #720 when increment number is bigint we need to make sure its a string
            if ((this.generationStrategy === "increment" || this.generationStrategy === "rowid") && this.type === "bigint" && value !== null)
                value = String(value);
            return { [useDatabaseName ? this.databaseName : this.propertyName]: value };
        }
    }
    /**
     * Extracts column value and returns its column name with this value in a literal object.
     * If column is in embedded (or recursive embedded) it returns complex literal object.
     *
     * Examples what this method can return depend if this column is in embeds.
     * { id: 1 } or { title: "hello" }, { counters: { code: 1 } }, { data: { information: { counters: { code: 1 } } } }
     */
    getEntityValueMap(entity, options) {
        const returnNulls = false; // options && options.skipNulls === false ? false : true; // todo: remove if current will not bring problems, uncomment if it will.
        // extract column value from embeds of entity if column is in embedded
        if (this.embeddedMetadata) {
            // example: post[data][information][counters].id where "data", "information" and "counters" are embeddeds
            // we need to get value of "id" column from the post real entity object and return it in a
            // { data: { information: { counters: { id: ... } } } } format
            // first step - we extract all parent properties of the entity relative to this column, e.g. [data, information, counters]
            const propertyNames = [...this.embeddedMetadata.parentPropertyNames];
            const isEmbeddedArray = this.embeddedMetadata.isArray;
            // now need to access post[data][information][counters] to get column value from the counters
            // and on each step we need to create complex literal object, e.g. first { data },
            // then { data: { information } }, then { data: { information: { counters } } },
            // then { data: { information: { counters: [this.propertyName]: entity[data][information][counters][this.propertyName] } } }
            // this recursive function helps doing that
            const extractEmbeddedColumnValue = (propertyNames, value) => {
                if (value === undefined) {
                    return {};
                }
                const propertyName = propertyNames.shift();
                if (propertyName) {
                    const submap = extractEmbeddedColumnValue(propertyNames, value[propertyName]);
                    if (Object.keys(submap).length > 0) {
                        return { [propertyName]: submap };
                    }
                    return {};
                }
                if (isEmbeddedArray && Array.isArray(value)) {
                    return value.map(v => ({ [this.propertyName]: v[this.propertyName] }));
                }
                if (value[this.propertyName] !== undefined && (returnNulls === false || value[this.propertyName] !== null)) {
                    return { [this.propertyName]: value[this.propertyName] };
                }
                return {};
            };
            const map = extractEmbeddedColumnValue(propertyNames, entity);
            return Object.keys(map).length > 0 ? map : undefined;
        }
        else { // no embeds - no problems. Simply return column property name and its value of the entity
            if (this.relationMetadata &&
                entity[this.relationMetadata.propertyName] &&
                ObjectUtils.isObject(entity[this.relationMetadata.propertyName])) {
                const map = this.relationMetadata.joinColumns.reduce((map, joinColumn) => {
                    const value = joinColumn.referencedColumn.getEntityValueMap(entity[this.relationMetadata.propertyName]);
                    if (value === undefined)
                        return map;
                    return OrmUtils.mergeDeep(map, value);
                }, {});
                if (Object.keys(map).length > 0)
                    return { [this.propertyName]: map };
                return undefined;
            }
            else {
                if (entity[this.propertyName] !== undefined && (returnNulls === false || entity[this.propertyName] !== null))
                    return { [this.propertyName]: entity[this.propertyName] };
                return undefined;
            }
        }
    }
    /**
     * Extracts column value from the given entity.
     * If column is in embedded (or recursive embedded) it extracts its value from there.
     */
    getEntityValue(entity, transform = false) {
        if (entity === undefined || entity === null)
            return undefined;
        // extract column value from embeddeds of entity if column is in embedded
        let value = undefined;
        if (this.embeddedMetadata) {
            // example: post[data][information][counters].id where "data", "information" and "counters" are embeddeds
            // we need to get value of "id" column from the post real entity object
            // first step - we extract all parent properties of the entity relative to this column, e.g. [data, information, counters]
            const propertyNames = [...this.embeddedMetadata.parentPropertyNames];
            const isEmbeddedArray = this.embeddedMetadata.isArray;
            // next we need to access post[data][information][counters][this.propertyName] to get column value from the counters
            // this recursive function takes array of generated property names and gets the post[data][information][counters] embed
            const extractEmbeddedColumnValue = (propertyNames, value) => {
                const propertyName = propertyNames.shift();
                return propertyName && value ? extractEmbeddedColumnValue(propertyNames, value[propertyName]) : value;
            };
            // once we get nested embed object we get its column, e.g. post[data][information][counters][this.propertyName]
            const embeddedObject = extractEmbeddedColumnValue(propertyNames, entity);
            if (embeddedObject) {
                if (this.relationMetadata && this.referencedColumn) {
                    const relatedEntity = this.relationMetadata.getEntityValue(embeddedObject);
                    if (relatedEntity && ObjectUtils.isObject(relatedEntity) && !(InstanceChecker.isFindOperator(relatedEntity)) && !(Buffer.isBuffer(relatedEntity))) {
                        value = this.referencedColumn.getEntityValue(relatedEntity);
                    }
                    else if (embeddedObject[this.propertyName] && ObjectUtils.isObject(embeddedObject[this.propertyName]) && !(InstanceChecker.isFindOperator(embeddedObject[this.propertyName])) && !(Buffer.isBuffer(embeddedObject[this.propertyName])) && !(embeddedObject[this.propertyName] instanceof Date)) {
                        value = this.referencedColumn.getEntityValue(embeddedObject[this.propertyName]);
                    }
                    else {
                        value = embeddedObject[this.propertyName];
                    }
                }
                else if (this.referencedColumn) {
                    value = this.referencedColumn.getEntityValue(embeddedObject[this.propertyName]);
                }
                else if (isEmbeddedArray && Array.isArray(embeddedObject)) {
                    value = embeddedObject.map(o => o[this.propertyName]);
                }
                else {
                    value = embeddedObject[this.propertyName];
                }
            }
        }
        else { // no embeds - no problems. Simply return column name by property name of the entity
            if (this.relationMetadata && this.referencedColumn) {
                const relatedEntity = this.relationMetadata.getEntityValue(entity);
                if (relatedEntity && ObjectUtils.isObject(relatedEntity) && !(InstanceChecker.isFindOperator(relatedEntity)) && !(typeof relatedEntity === "function") && !(Buffer.isBuffer(relatedEntity))) {
                    value = this.referencedColumn.getEntityValue(relatedEntity);
                }
                else if (entity[this.propertyName] && ObjectUtils.isObject(entity[this.propertyName]) && !(InstanceChecker.isFindOperator(entity[this.propertyName])) && !(typeof entity[this.propertyName] === "function") && !(Buffer.isBuffer(entity[this.propertyName])) && !(entity[this.propertyName] instanceof Date)) {
                    value = this.referencedColumn.getEntityValue(entity[this.propertyName]);
                }
                else {
                    value = entity[this.propertyName];
                }
            }
            else if (this.referencedColumn) {
                value = this.referencedColumn.getEntityValue(entity[this.propertyName]);
            }
            else {
                value = entity[this.propertyName];
            }
        }
        if (transform && this.transformer)
            value = ApplyValueTransformers.transformTo(this.transformer, value);
        return value;
    }
    /**
     * Sets given entity's column value.
     * Using of this method helps to set entity relation's value of the lazy and non-lazy relations.
     */
    setEntityValue(entity, value) {
        if (this.embeddedMetadata) {
            // first step - we extract all parent properties of the entity relative to this column, e.g. [data, information, counters]
            const extractEmbeddedColumnValue = (embeddedMetadatas, map) => {
                // if (!object[embeddedMetadata.propertyName])
                //     object[embeddedMetadata.propertyName] = embeddedMetadata.create();
                const embeddedMetadata = embeddedMetadatas.shift();
                if (embeddedMetadata) {
                    if (!map[embeddedMetadata.propertyName])
                        map[embeddedMetadata.propertyName] = embeddedMetadata.create();
                    extractEmbeddedColumnValue(embeddedMetadatas, map[embeddedMetadata.propertyName]);
                    return map;
                }
                map[this.propertyName] = value;
                return map;
            };
            return extractEmbeddedColumnValue([...this.embeddedMetadata.embeddedMetadataTree], entity);
        }
        else {
            // we write a deep object in this entity only if the column is virtual
            // because if its not virtual it means the user defined a real column for this relation
            // also we don't do it if column is inside a junction table
            if (!this.entityMetadata.isJunction && this.isVirtual && this.referencedColumn && this.referencedColumn.propertyName !== this.propertyName) {
                if (!(this.propertyName in entity)) {
                    entity[this.propertyName] = {};
                }
                entity[this.propertyName][this.referencedColumn.propertyName] = value;
            }
            else {
                entity[this.propertyName] = value;
            }
        }
    }
    /**
     * Compares given entity's column value with a given value.
     */
    compareEntityValue(entity, valueToCompareWith) {
        const columnValue = this.getEntityValue(entity);
        if (ObjectUtils.isObject(columnValue)) {
            return columnValue.equals(valueToCompareWith);
        }
        return columnValue === valueToCompareWith;
    }
    // ---------------------------------------------------------------------
    // Builder Methods
    // ---------------------------------------------------------------------
    build(connection) {
        this.propertyPath = this.buildPropertyPath();
        this.propertyAliasName = this.propertyPath.replace(".", "_");
        this.databaseName = this.buildDatabaseName(connection);
        this.databasePath = this.buildDatabasePath();
        this.databaseNameWithoutPrefixes = connection.namingStrategy.columnName(this.propertyName, this.givenDatabaseName, []);
        return this;
    }
    buildPropertyPath() {
        let path = "";
        if (this.embeddedMetadata && this.embeddedMetadata.parentPropertyNames.length)
            path = this.embeddedMetadata.parentPropertyNames.join(".") + ".";
        path += this.propertyName;
        // we add reference column to property path only if this column is virtual
        // because if its not virtual it means user defined a real column for this relation
        // also we don't do it if column is inside a junction table
        if (!this.entityMetadata.isJunction && this.isVirtual && this.referencedColumn && this.referencedColumn.propertyName !== this.propertyName)
            path += "." + this.referencedColumn.propertyName;
        return path;
    }
    buildDatabasePath() {
        let path = "";
        if (this.embeddedMetadata && this.embeddedMetadata.parentPropertyNames.length)
            path = this.embeddedMetadata.parentPropertyNames.join(".") + ".";
        path += this.databaseName;
        // we add reference column to property path only if this column is virtual
        // because if its not virtual it means user defined a real column for this relation
        // also we don't do it if column is inside a junction table
        if (!this.entityMetadata.isJunction && this.isVirtual && this.referencedColumn && this.referencedColumn.databaseName !== this.databaseName)
            path += "." + this.referencedColumn.databaseName;
        return path;
    }
    buildDatabaseName(connection) {
        let propertyNames = this.embeddedMetadata ? this.embeddedMetadata.parentPrefixes : [];
        if (connection.driver.options.type === "mongodb") // we don't need to include embedded name for the mongodb column names
            propertyNames = [];
        return connection.namingStrategy.columnName(this.propertyName, this.givenDatabaseName, propertyNames);
    }
}

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