/*
 * Copyright 2015 Palantir Technologies, Inc. All rights reserved.
 * Licensed under the BSD-3 License as modified (the “License”); you may obtain a copy
 * of the license at https://github.com/palantir/blueprint/blob/master/LICENSE
 * and https://github.com/palantir/blueprint/blob/master/PATENTS
 */

import * as React from "react";

import { Intent } from "./intent";
import { shallowClone } from "./utils";

export type HTMLInputProps = React.HTMLProps<HTMLInputElement>;

/**
 * A shared base interface for all Blueprint component props.
 */
export interface IProps {
    /** A space-delimited list of class names to pass along to a child element. */
    className?: string;
}

export interface IIntentProps {
    /** Visual intent color to apply to element. */
    intent?: Intent;
}

/**
 * Interface for a clickable action, such as a button or menu item.
 * These props can be spready directly to a `<Button>` or `<MenuItem>` element.
 */
export interface IActionProps extends IIntentProps, IProps {
    /** Whether this action is non-interactive. */
    disabled?: boolean;

    /** Name of icon (the part after `pt-icon-`) to add to button. */
    iconName?: string;

    /** Click event handler. */
    onClick?: (event: React.MouseEvent<HTMLElement>) => void;

    /** Action text, required for usability. */
    text?: string;
}

/** Interface for a link, with support for customizing target window. */
export interface ILinkProps {
    /** Link URL. */
    href?: string;

    /** Link target attribute. Use "_blank" to open in a new window. */
    target?: string;
}

/** Interface for a controlled input. */
export interface IControlledProps {
    /** Initial value of the input, for uncontrolled usage. */
    defaultValue?: string;

    /** Change event handler. Use `event.target.value` for new value. */
    onChange?: React.FormEventHandler<HTMLElement>;

    /** Form value of the input, for controlled usage. */
    value?: string;
}

/**
 * An interface for an option in a list, such as in a `<select>` or `RadioGroup`.
 * These props can be spread directly to an `<option>` or `<Radio>` element.
 */
export interface IOptionProps extends IProps {
    /** Whether this option is non-interactive. */
    disabled?: boolean;

    /** Label text for this option. */
    label: string;

    /** Value of this option */
    value: string;
}

/** A collection of curated prop keys used across our Components which are not valid HTMLElement props. */
const INVALID_PROPS = [
    "containerRef",
    "defaultIndeterminate",
    "elementRef",
    "iconName",
    "inputRef",
    "intent",
    "loading",
    "leftIconName",
    "onChildrenMount",
    "onRemove",
    "rightElement",
    "rightIconName",
    "text",
];

/**
 * Typically applied to HTMLElements to filter out blacklisted props. When applied to a Component,
 * can filter props from being passed down to the children. Can also filter by a combined list of
 * supplied prop keys and the blacklist (only appropriate for HTMLElements).
 * @param props The original props object to filter down.
 * @param {string[]} invalidProps If supplied, overwrites the default blacklist.
 * @param {boolean} shouldMerge If true, will merge supplied invalidProps and blacklist together.
 */
export function removeNonHTMLProps<T extends U, U>(props: T, invalidProps = INVALID_PROPS, shouldMerge = false): U {
    if (shouldMerge) {
        invalidProps = invalidProps.concat(INVALID_PROPS);
    }

    return invalidProps.reduce((prev, curr) => {
        if (prev.hasOwnProperty(curr)) {
            delete (prev as any)[curr];
        }
        return prev;
    }, shallowClone(props));
}