import { DataComponent } from '../runtime';
export type DataTransform = SortByTransform | SortTransform | PickTransform | RenameTransform | FoldTransform | JoinTransform | FilterDataTransform | MapTransform | SliceTransform | KDEDataTransform | VennDataTransform | LogDataTransform | CustomTransform | EMADataTransform;
export type DataTransformTypes = 'sortBy' | 'sort' | 'pick' | 'rename' | 'fold' | 'join' | 'filter' | 'map' | 'slice' | 'kde' | 'venn' | 'log' | 'custom' | 'ema' | DataComponent;
export type SortByTransform = {
    type?: 'sortBy';
    /** type: [field, order]; order: true => ascend, false => descend */
    fields?: (string | [string, boolean?])[];
};
export type PickTransform = {
    type?: 'pick';
    fields?: string[];
};
export type RenameTransform = {
    type?: 'rename';
    [key: string]: string;
};
export type FilterDataTransform = {
    type?: 'filter';
    /**
     * The filter condition, same with [Array.prototype.filter](https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Array/filter).
     */
    callback?: (v: any, idx: number, arr: any[]) => boolean;
};
export type SliceTransform = {
    type?: 'slice';
    /**
     * The start index for slice. Default is 0.
     */
    start?: number;
    /**
     * The end index for slice. Default is arr.length - 1
     */
    end?: number;
};
export type SortTransform = {
    type?: 'sort';
    /**
     * The sort comparator, same with [Array.prototype.sort](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/sort).
     */
    callback?: (a: any, b: any) => number;
};
export type FoldTransform = {
    type?: 'fold';
    /**
     * Set fields will be folded.
     */
    fields?: string[];
    /**
     * Fold key field, default is `key`.
     */
    key?: string;
    /**
     * Fold value field, default is `value`.
     */
    value?: string;
};
export type JoinTransform = {
    type?: 'join';
    /**
     * The dataset to be joined.
     */
    join: Record<string, any>[];
    /**
     * Join keys of 2 dataset, [k1, k2] means join on ds1.k1 === ds2.k2.
     */
    on: [string | ((d: any) => string), string | ((d: any) => string)];
    /**
     * Select fields from joined dataset.
     */
    select: string[];
    /**
     * Rename the select fields, default: keep the original name.
     */
    as?: string[];
    /**
     * When not matched, use `unknown` instead.
     */
    unknown?: any;
};
export type MapTransform = {
    type?: 'map';
    callback?: (d: any) => any;
};
export type CustomDataTransform = {
    type?: 'custom';
    callback?: (d: any) => any;
};
export type KDEDataTransform = {
    type?: 'kde';
    /**
     * Kernel Density Estimation field.
     */
    field: string;
    /**
     * Group data by fields.
     */
    groupBy: string[];
    /**
     * Generate new fieds, default: ['y', 'size']
     */
    as?: ['y', 'size'];
    /**
     * Defaults to smallest value in the array minus some threshold.
     */
    min?: number;
    /**
     * Defaults to largest value in the array plus some threshold.
     */
    max?: number;
    /**
     * Number of points to represent the pdf. Defaults to 10.
     */
    size?: number;
    /**
     * Determine how many points to the left and right does an element affect,
     * similar to bandwidth in kernel density estimation. Defaults to 2.
     */
    width?: number;
};
export type VennDataTransform = {
    type?: 'venn';
    /**
     * Canvas padding for 4 direction.
     * Default is `0`.
     */
    padding?: number;
    /**
     * Set the sets field.
     * Default is `sets`.
     */
    sets?: string;
    /**
     * Set the size field for each set.
     * Default is `size`.
     */
    size?: string;
    /**
     * Set the generated fields, includes: [key, x, y, path]
     */
    as?: [string, string];
};
export type LogDataTransform = {};
export type CustomTransform = {
    type?: DataComponent;
    [key: string]: any;
};
export type EMADataTransform = {
    type?: 'ema';
    field?: string;
    alpha?: number;
    as?: string;
};