import { _ as _async_to_generator } from "@swc/helpers/_/_async_to_generator";
import { _ as _define_property } from "@swc/helpers/_/_define_property";
import { _ as _object_spread } from "@swc/helpers/_/_object_spread";
import { _ as _object_spread_props } from "@swc/helpers/_/_object_spread_props";
import { _ as _object_without_properties } from "@swc/helpers/_/_object_without_properties";
import { _ as _sliced_to_array } from "@swc/helpers/_/_sliced_to_array";
import { _ as _ts_generator } from "@swc/helpers/_/_ts_generator";
import React, { useCallback, useEffect, useMemo, useRef, useState } from "react";
import classNames from "classnames";
import { getEnv, usePageScroll } from "@tarojs/taro";
import { View } from "@tarojs/components";
import { getWindowInfo } from "../../utils/taro/get-system-info";
import { ComponentDefaults } from "../../utils/typings";
import { useWatch } from "../../hooks/use-watch";
import { getRectInMultiPlatform } from "../../utils/taro/get-rect";
import { getScrollParent } from "../../utils/get-scroll-parent";
var defaultProps = _object_spread_props(_object_spread({}, ComponentDefaults), {
    position: 'top',
    zIndex: 900
});
var classPrefix = 'nut-sticky';
export var Sticky = function(props) {
    var _ref = _object_spread({}, defaultProps, props), position = _ref.position, zIndex = _ref.zIndex, threshold = _ref.threshold, style = _ref.style, children = _ref.children, container = _ref.container, className = _ref.className, onChange = _ref.onChange, rest = _object_without_properties(_ref, [
        "position",
        "zIndex",
        "threshold",
        "style",
        "children",
        "container",
        "className",
        "onChange"
    ]);
    var stickyRef = useRef(null);
    var rootRef = useRef(null);
    var _useState = _sliced_to_array(useState({}), 2), rootRect = _useState[0], setRootRect = _useState[1];
    var _useState1 = _sliced_to_array(useState(false), 2), fixed = _useState1[0], setFixed = _useState1[1];
    var _useState2 // 相对容器偏移距离
     = _sliced_to_array(useState(0), 2), transform = _useState2[0], setTransform = _useState2[1];
    useWatch(fixed, function() {
        onChange && onChange(fixed);
    });
    var rootStyle = useMemo(function() {
        if (!fixed) {
            return {
                height: '',
                width: ''
            };
        }
        var _rootRect_height, _rootRect_width;
        var style = {
            height: (_rootRect_height = rootRect.height) !== null && _rootRect_height !== void 0 ? _rootRect_height : '',
            width: (_rootRect_width = rootRect.width) !== null && _rootRect_width !== void 0 ? _rootRect_width : ''
        };
        return style;
    }, [
        fixed,
        rootRect.height,
        rootRect.width
    ]);
    var stickyStyle = useMemo(function() {
        if (!fixed) {
            return _define_property({
                height: '',
                width: ''
            }, position, '');
        }
        var _rootRect_height, _rootRect_width;
        var _obj;
        var style = (_obj = {
            height: (_rootRect_height = rootRect.height) !== null && _rootRect_height !== void 0 ? _rootRect_height : '',
            width: (_rootRect_width = rootRect.width) !== null && _rootRect_width !== void 0 ? _rootRect_width : '',
            transform: "translate3d(0, ".concat(transform, "px, 0)")
        }, _define_property(_obj, position, threshold), _define_property(_obj, "zIndex", zIndex), _obj);
        return style;
    }, [
        fixed,
        rootRect.height,
        rootRect.width,
        transform,
        position,
        threshold,
        zIndex
    ]);
    var handleScroll = function(scrollTop) {
        return _async_to_generator(function() {
            var curRootRect, stickyRect, containerRect, difference, curTransform, curFixed, windowHeight;
            return _ts_generator(this, function(_state) {
                switch(_state.label){
                    case 0:
                        return [
                            4,
                            getRectInMultiPlatform(rootRef.current)
                        ];
                    case 1:
                        curRootRect = _state.sent();
                        return [
                            4,
                            getRectInMultiPlatform(stickyRef.current)
                        ];
                    case 2:
                        stickyRect = _state.sent();
                        if (!curRootRect || !stickyRect) {
                            console.warn('getRectByTaro获取失败', {
                                stickyRect: stickyRect,
                                curRootRect: curRootRect
                            });
                            return [
                                2
                            ];
                        }
                        setRootRect(curRootRect);
                        if (!(position === 'top')) return [
                            3,
                            6
                        ];
                        if (!container) return [
                            3,
                            4
                        ];
                        return [
                            4,
                            getRectInMultiPlatform(container.current)
                        ];
                    case 3:
                        containerRect = _state.sent();
                        difference = containerRect.bottom - threshold - curRootRect.height;
                        curTransform = difference < 0 ? difference : 0;
                        setTransform(curTransform);
                        curFixed = threshold > curRootRect.top && containerRect.bottom > 0;
                        setFixed(curFixed);
                        return [
                            3,
                            5
                        ];
                    case 4:
                        setFixed(threshold > curRootRect.top);
                        _state.label = 5;
                    case 5:
                        return [
                            3,
                            7
                        ];
                    case 6:
                        windowHeight = getWindowInfo().windowHeight;
                        setFixed(windowHeight - threshold < curRootRect.bottom);
                        _state.label = 7;
                    case 7:
                        return [
                            2
                        ];
                }
            });
        })();
    };
    var getElement = useCallback(function() {
        return getScrollParent(rootRef.current);
    }, []);
    useEffect(function() {
        if (getEnv() === 'WEB' && getElement() !== window) {
            window.addEventListener('touchmove', handleScroll, true);
            window.addEventListener('scroll', handleScroll, true);
            return function() {
                window.removeEventListener('touchmove', handleScroll);
                window.removeEventListener('scroll', handleScroll);
            };
        }
    }, []);
    usePageScroll(function(res) {
        if (getEnv() !== 'WEB') {
            handleScroll(res.scrollTop);
        }
    });
    return /*#__PURE__*/ React.createElement("div", _object_spread({
        ref: rootRef,
        style: rootStyle,
        className: classNames(classPrefix, className)
    }, rest), /*#__PURE__*/ React.createElement(View, {
        className: classNames('nut-sticky-box', {
            'nut-sticky-fixed': fixed
        }),
        ref: stickyRef,
        style: stickyStyle
    }, children));
};
Sticky.displayName = 'NutSticky';
