/*
 * Copyright 2015 Palantir Technologies, Inc. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { __decorate } from "tslib";
import classNames from "classnames";
import * as React from "react";
import { polyfill } from "react-lifecycles-compat";
import { AbstractPureComponent2, Classes, Keys } from "../../common";
import { DISPLAYNAME_PREFIX } from "../../common/props";
import * as Utils from "../../common/utils";
import { Tab } from "./tab";
import { generateTabPanelId, generateTabTitleId, TabTitle } from "./tabTitle";
export const Expander = () => React.createElement("div", { className: Classes.FLEX_EXPANDER });
const TAB_SELECTOR = `.${Classes.TAB}`;
let Tabs = /** @class */ (() => {
    let Tabs = class Tabs extends AbstractPureComponent2 {
        constructor(props) {
            super(props);
            this.refHandlers = {
                tablist: (tabElement) => (this.tablistElement = tabElement),
            };
            this.handleKeyDown = (e) => {
                const focusedElement = document.activeElement.closest(TAB_SELECTOR);
                // rest of this is potentially expensive and futile, so bail if no tab is focused
                if (focusedElement == null) {
                    return;
                }
                // must rely on DOM state because we have no way of mapping `focusedElement` to a JSX.Element
                const enabledTabElements = this.getTabElements().filter(el => el.getAttribute("aria-disabled") === "false");
                const focusedIndex = enabledTabElements.indexOf(focusedElement);
                const direction = this.getKeyCodeDirection(e);
                if (focusedIndex >= 0 && direction !== undefined) {
                    e.preventDefault();
                    const { length } = enabledTabElements;
                    // auto-wrapping at 0 and `length`
                    const nextFocusedIndex = (focusedIndex + direction + length) % length;
                    enabledTabElements[nextFocusedIndex].focus();
                }
            };
            this.handleKeyPress = (e) => {
                const targetTabElement = e.target.closest(TAB_SELECTOR);
                if (targetTabElement != null && Keys.isKeyboardClick(e.which)) {
                    e.preventDefault();
                    targetTabElement.click();
                }
            };
            this.handleTabClick = (newTabId, event) => {
                Utils.safeInvoke(this.props.onChange, newTabId, this.state.selectedTabId, event);
                if (this.props.selectedTabId === undefined) {
                    this.setState({ selectedTabId: newTabId });
                }
            };
            this.renderTabPanel = (tab) => {
                const { className, panel, id, panelClassName } = tab.props;
                if (panel === undefined) {
                    return undefined;
                }
                return (React.createElement("div", { "aria-labelledby": generateTabTitleId(this.props.id, id), "aria-hidden": id !== this.state.selectedTabId, className: classNames(Classes.TAB_PANEL, className, panelClassName), id: generateTabPanelId(this.props.id, id), key: id, role: "tabpanel" }, panel));
            };
            this.renderTabTitle = (child) => {
                if (isTabElement(child)) {
                    const { id } = child.props;
                    return (React.createElement(TabTitle, Object.assign({}, child.props, { parentId: this.props.id, onClick: this.handleTabClick, selected: id === this.state.selectedTabId })));
                }
                return child;
            };
            const selectedTabId = this.getInitialSelectedTabId();
            this.state = { selectedTabId };
        }
        static getDerivedStateFromProps({ selectedTabId }) {
            if (selectedTabId !== undefined) {
                // keep state in sync with controlled prop, so state is canonical source of truth
                return { selectedTabId };
            }
            return null;
        }
        render() {
            const { indicatorWrapperStyle, selectedTabId } = this.state;
            const tabTitles = React.Children.map(this.props.children, this.renderTabTitle);
            const tabPanels = this.getTabChildren()
                .filter(this.props.renderActiveTabPanelOnly ? tab => tab.props.id === selectedTabId : () => true)
                .map(this.renderTabPanel);
            const tabIndicator = this.props.animate ? (React.createElement("div", { className: Classes.TAB_INDICATOR_WRAPPER, style: indicatorWrapperStyle },
                React.createElement("div", { className: Classes.TAB_INDICATOR }))) : null;
            const classes = classNames(Classes.TABS, { [Classes.VERTICAL]: this.props.vertical }, this.props.className);
            const tabListClasses = classNames(Classes.TAB_LIST, {
                [Classes.LARGE]: this.props.large,
            });
            return (React.createElement("div", { className: classes },
                React.createElement("div", { className: tabListClasses, onKeyDown: this.handleKeyDown, onKeyPress: this.handleKeyPress, ref: this.refHandlers.tablist, role: "tablist" },
                    tabIndicator,
                    tabTitles),
                tabPanels));
        }
        componentDidMount() {
            this.moveSelectionIndicator();
        }
        componentDidUpdate(prevProps, prevState) {
            if (this.state.selectedTabId !== prevState.selectedTabId) {
                this.moveSelectionIndicator();
            }
            else if (prevState.selectedTabId != null) {
                // comparing React nodes is difficult to do with simple logic, so
                // shallowly compare just their props as a workaround.
                const didChildrenChange = !Utils.arraysEqual(this.getTabChildrenProps(prevProps), this.getTabChildrenProps(), Utils.shallowCompareKeys);
                if (didChildrenChange) {
                    this.moveSelectionIndicator();
                }
            }
        }
        getInitialSelectedTabId() {
            // NOTE: providing an unknown ID will hide the selection
            const { defaultSelectedTabId, selectedTabId } = this.props;
            if (selectedTabId !== undefined) {
                return selectedTabId;
            }
            else if (defaultSelectedTabId !== undefined) {
                return defaultSelectedTabId;
            }
            else {
                // select first tab in absence of user input
                const tabs = this.getTabChildren();
                return tabs.length === 0 ? undefined : tabs[0].props.id;
            }
        }
        getKeyCodeDirection(e) {
            if (isEventKeyCode(e, Keys.ARROW_LEFT, Keys.ARROW_UP)) {
                return -1;
            }
            else if (isEventKeyCode(e, Keys.ARROW_RIGHT, Keys.ARROW_DOWN)) {
                return 1;
            }
            return undefined;
        }
        getTabChildrenProps(props = this.props) {
            return this.getTabChildren(props).map(child => child.props);
        }
        /** Filters children to only `<Tab>`s */
        getTabChildren(props = this.props) {
            return React.Children.toArray(props.children).filter(isTabElement);
        }
        /** Queries root HTML element for all tabs with optional filter selector */
        getTabElements(subselector = "") {
            if (this.tablistElement == null) {
                return [];
            }
            return Array.from(this.tablistElement.querySelectorAll(TAB_SELECTOR + subselector));
        }
        /**
         * Calculate the new height, width, and position of the tab indicator.
         * Store the CSS values so the transition animation can start.
         */
        moveSelectionIndicator() {
            if (this.tablistElement == null || !this.props.animate) {
                return;
            }
            const tabIdSelector = `${TAB_SELECTOR}[data-tab-id="${this.state.selectedTabId}"]`;
            const selectedTabElement = this.tablistElement.querySelector(tabIdSelector);
            let indicatorWrapperStyle = { display: "none" };
            if (selectedTabElement != null) {
                const { clientHeight, clientWidth, offsetLeft, offsetTop } = selectedTabElement;
                indicatorWrapperStyle = {
                    height: clientHeight,
                    transform: `translateX(${Math.floor(offsetLeft)}px) translateY(${Math.floor(offsetTop)}px)`,
                    width: clientWidth,
                };
            }
            this.setState({ indicatorWrapperStyle });
        }
    };
    /** Insert a `Tabs.Expander` between any two children to right-align all subsequent children. */
    Tabs.Expander = Expander;
    Tabs.Tab = Tab;
    Tabs.defaultProps = {
        animate: true,
        large: false,
        renderActiveTabPanelOnly: false,
        vertical: false,
    };
    Tabs.displayName = `${DISPLAYNAME_PREFIX}.Tabs`;
    Tabs = __decorate([
        polyfill
    ], Tabs);
    return Tabs;
})();
export { Tabs };
function isEventKeyCode(e, ...codes) {
    return codes.indexOf(e.which) >= 0;
}
function isTabElement(child) {
    return Utils.isElementOfType(child, Tab);
}
//# sourceMappingURL=tabs.js.map