/**
 * @class BI.Combo
 * @extends BI.Widget
 */

import { shortcut, Widget, Controller, extend, createWidget, nextTick, bind, isNotNull, isNull, isFunction, each } from "../../core";
import { Bubble } from "./bubble";
import { Resizers } from "../0.base";

let needHideWhenAnotherComboOpen = {};
let currentOpenedCombos = {};

@shortcut()
export class Combo extends Bubble {
    static xtype = "bi.combo";

    static EVENT_TRIGGER_CHANGE = "EVENT_TRIGGER_CHANGE";
    static EVENT_CHANGE = "EVENT_CHANGE";
    static EVENT_EXPAND = "EVENT_EXPAND";
    static EVENT_COLLAPSE = "EVENT_COLLAPSE";
    static EVENT_AFTER_INIT = "EVENT_AFTER_INIT";

    static EVENT_BEFORE_POPUPVIEW = "EVENT_BEFORE_POPUPVIEW";
    static EVENT_AFTER_POPUPVIEW = "EVENT_AFTER_POPUPVIEW";
    static EVENT_BEFORE_HIDEVIEW = "EVENT_BEFORE_HIDEVIEW";
    static EVENT_AFTER_HIDEVIEW = "EVENT_AFTER_HIDEVIEW";

    _defaultConfig() {
        const conf = super._defaultConfig(arguments);

        return extend(conf, {
            baseCls: (conf.baseCls || "") + " bi-combo" + (BI.isIE() ? " hack" : ""),
            attributes: {
                tabIndex: -1,
            },
            trigger: "click", // click || hover || click-hover || ""
            toggle: true,
            direction: "bottom", // top||bottom||left||right||top,left||top,right||bottom,left||bottom,right||right,innerRight||right,innerLeft||innerRight||innerLeft
            logic: {
                dynamic: true,
            },
            container: null, // popupview放置的容器，默认为this.element
            isDefaultInit: false,
            destroyWhenHide: false,
            hideWhenBlur: true,
            hideWhenAnotherComboOpen: false,
            hideWhenClickOutside: true,
            showArrow: false,
            isNeedAdjustHeight: true, // 是否需要高度调整
            isNeedAdjustWidth: true,
            stopEvent: false,
            stopPropagation: false,
            adjustLength: 0, // 调整的距离
            adjustXOffset: 0,
            adjustYOffset: 0,
            supportCSSTransform: true,
            hideChecker: BI.emptyFn,
            offsetStyle: "", // "",center,middle
            el: {},
            popup: {},
            comboClass: "bi-combo-popup",
            hoverClass: "bi-combo-hover",
            belowMouse: false,
        });
    }

    render() {
        const { hoverClass, logic, isDefaultInit } = this.options;
        this._initCombo();
        // 延迟绑定事件，这样可以将自己绑定的事情优先执行
        nextTick(() => {
            !this.isDestroyed() && this._initPullDownAction();
        });
        this.combo.on(Controller.EVENT_CHANGE, (type, value, obj, ...args) => {
            if (this.isEnabled() && this.isValid()) {
                if (type === BI.Events.TOGGLE) {
                    this._toggle();
                }
                if (type === BI.Events.EXPAND) {
                    this._popupView();
                }
                if (type === BI.Events.COLLAPSE) {
                    this._hideView();
                }
                if (type === BI.Events.EXPAND) {
                    this.fireEvent(Controller.EVENT_CHANGE, type, value, obj, ...args);
                    this.fireEvent(Combo.EVENT_EXPAND);
                }
                if (type === BI.Events.COLLAPSE) {
                    this.fireEvent(Controller.EVENT_CHANGE, type, value, obj, ...args);
                    this.isViewVisible() && this.fireEvent(Combo.EVENT_COLLAPSE);
                }
                if (type === BI.Events.CLICK) {
                    this.fireEvent(Combo.EVENT_TRIGGER_CHANGE, obj);
                }
            }
        });

        this.element.on("mouseenter." + this.getName(), (e) => {
            if (this.isEnabled() && this.isValid() && this.combo.isEnabled() && this.combo.isValid()) {
                this.element.addClass(hoverClass);
            }
        });
        this.element.on("mouseleave." + this.getName(), (e) => {
            if (this.isEnabled() && this.isValid() && this.combo.isEnabled() && this.combo.isValid()) {
                this.element.removeClass(hoverClass);
            }
        });

        createWidget(extend({
            element: this,
            scrolly: false,
        }, BI.LogicFactory.createLogic("vertical", extend(logic, {
            items: [
                { el: this.combo }
            ],
        }))));
        isDefaultInit && (this._assertPopupView());
        Resizers.add(this.getName(), bind((e) => {
            // 如果resize对象是combo的子元素，则不应该收起，或交由hideChecker去处理
            if (this.isViewVisible()) {
                isNotNull(e) ? this._hideIf(e) : this._hideView();
            }
        }, this));
    }

    _assertPopupView() {
        const { showArrow, value, hideWhenClickOutside, hideWhenBlur } = this.options;
        if (isNull(this.popupView)) {
            this.popupView = createWidget(isFunction(this.options.popup) ? this.options.popup() : this.options.popup, {
                type: "bi.popup_view",
                showArrow,
                value,
            }, this);
            this.popupView.on(Controller.EVENT_CHANGE, (type, value, obj, ...args) => {
                if (type === BI.Events.CLICK) {
                    this.combo.setValue(this.getValue());
                    this.fireEvent(Bubble.EVENT_CHANGE, value, obj);
                }
                this.fireEvent(Controller.EVENT_CHANGE, type, value, obj, ...args);
            });
            this.popupView.setVisible(false);
            nextTick(() => {
                this.fireEvent(Bubble.EVENT_AFTER_INIT);
            });
        }
    }

    _hideView(e) {
        const { hideWhenClickOutside, hideWhenBlur } = this.options;
        this.fireEvent(Combo.EVENT_BEFORE_HIDEVIEW);
        if (this.options.destroyWhenHide === true) {
            this.popupView && this.popupView.destroy();
            this.popupView = null;
            this._rendered = false;
        } else {
            this.popupView && this.popupView.invisible();
        }

        if (!e || !this.combo.element.__isMouseInBounds__(e)) {
            this.element.removeClass(this.options.hoverClass);
            // 应对bi-focus-shadow在收起时不失焦
            this.element.blur();
        }

        this.element.removeClass(this.options.comboClass);
        delete needHideWhenAnotherComboOpen[this.getName()];
        delete currentOpenedCombos[this.getName()];

        hideWhenClickOutside && Widget._renderEngine.createElement(document).unbind("mousedown." + this.getName()).unbind("mousewheel." + this.getName());
        BI.EVENT_BLUR && hideWhenBlur && Widget._renderEngine.createElement(window).unbind("blur." + this.getName());
        this.fireEvent(Combo.EVENT_AFTER_HIDEVIEW, e);
    }

    _popupView(e) {
        const { hideWhenClickOutside, hideWhenBlur } = this.options;
        this._assertPopupViewRender();
        this.fireEvent(Combo.EVENT_BEFORE_POPUPVIEW);
        // popupVisible是为了获取其宽高, 放到可视范围之外以防止在IE下闪一下
        this.popupView.css({ left: -99999, top: -99999 });
        this.popupView.visible();
        each(needHideWhenAnotherComboOpen, (i, combo) => {
            if (i !== this.getName()) {
                if (combo && combo._hideIf(e, true) === true) {
                    delete needHideWhenAnotherComboOpen[i];
                }
            }
        });
        currentOpenedCombos[this.getName()] = this;
        this.options.hideWhenAnotherComboOpen && (needHideWhenAnotherComboOpen[this.getName()] = this);
        this.adjustWidth(e);
        this.adjustHeight(e);

        this.element.addClass(this.options.comboClass);
        hideWhenClickOutside && Widget._renderEngine.createElement(document).unbind("mousedown." + this.getName()).unbind("mousewheel." + this.getName());
        hideWhenClickOutside && Widget._renderEngine.createElement(document).unbind("mousewheel." + this.getName());
        BI.EVENT_BLUR && hideWhenBlur && Widget._renderEngine.createElement(window).unbind("blur." + this.getName());

        hideWhenClickOutside && Widget._renderEngine.createElement(document).bind("mousewheel." + this.getName(), bind(this._hideIf, this));
        hideWhenClickOutside && Widget._renderEngine.createElement(document).bind("mousedown." + this.getName(), bind(this._hideIf, this)).bind("mousewheel." + this.getName(), bind(this._hideIf, this));
        BI.EVENT_BLUR && hideWhenBlur && Widget._renderEngine.createElement(window).bind("blur." + this.getName(), bind(this._hideIf, this));
        this.fireEvent(Combo.EVENT_AFTER_POPUPVIEW);
    }

    adjustHeight(e) {
        const { belowMouse, supportCSSTransform, container, direction, adjustXOffset, adjustYOffset, adjustLength, showArrow, isNeedAdjustHeight, offsetStyle } = this.options;
        let p = {};
        if (!this.popupView) {
            return;
        }
        const isVisible = this.popupView.isVisible();
        this.popupView.visible();
        const combo = (belowMouse && isNotNull(e)) ? {
            element: {
                0: e.target,
                offset: () => {
                    return {
                        left: e.pageX,
                        top: e.pageY,
                    };
                },
                bounds: () => {
                    // offset为其相对于父定位元素的偏移
                    return {
                        x: e.offsetX,
                        y: e.offsetY,
                        width: 0,
                        height: 24,
                    };
                },
                outerWidth: () => {
                    return 0;
                },
                outerHeight: () => {
                    return 24;
                },
            },
        } : this.combo;
        const positionRelativeElement = supportCSSTransform ? BI.DOM.getPositionRelativeContainingBlock(isNull(container) ? this.element[0] : Widget._renderEngine.createElement(isFunction(container) ? container() : container)[0]) : null;
        const TRIANGLE_LENGTH = 12;
        switch (direction) {
            case "bottom":
            case "bottom,right":
                p = BI.DOM.getComboPosition(combo, this.popupView, adjustXOffset, (adjustYOffset + adjustLength) + (showArrow ? TRIANGLE_LENGTH : 0), isNeedAdjustHeight, ["bottom", "top", "right", "left"], offsetStyle, positionRelativeElement);
                break;
            case "top":
            case "top,right":
                p = BI.DOM.getComboPosition(combo, this.popupView, adjustXOffset, (adjustYOffset + adjustLength) + (showArrow ? TRIANGLE_LENGTH : 0), isNeedAdjustHeight, ["top", "bottom", "right", "left"], offsetStyle, positionRelativeElement);
                break;
            case "left":
            case "left,bottom":
                p = BI.DOM.getComboPosition(combo, this.popupView, (adjustXOffset + adjustLength) + (showArrow ? TRIANGLE_LENGTH : 0), adjustYOffset, isNeedAdjustHeight, ["left", "right", "bottom", "top"], offsetStyle, positionRelativeElement);
                break;
            case "right":
            case "right,bottom":
                p = BI.DOM.getComboPosition(combo, this.popupView, (adjustXOffset + adjustLength) + (showArrow ? TRIANGLE_LENGTH : 0), adjustYOffset, isNeedAdjustHeight, ["right", "left", "bottom", "top"], offsetStyle, positionRelativeElement);
                break;
            case "top,left":
                p = BI.DOM.getComboPosition(combo, this.popupView, adjustXOffset, (adjustYOffset + adjustLength) + (showArrow ? TRIANGLE_LENGTH : 0), isNeedAdjustHeight, ["top", "bottom", "left", "right"], offsetStyle, positionRelativeElement);
                break;
            case "bottom,left":
                p = BI.DOM.getComboPosition(combo, this.popupView, adjustXOffset, (adjustYOffset + adjustLength) + (showArrow ? TRIANGLE_LENGTH : 0), isNeedAdjustHeight, ["bottom", "top", "left", "right"], offsetStyle, positionRelativeElement);
                break;
            case "left,top":
                p = BI.DOM.getComboPosition(combo, this.popupView, (adjustXOffset + adjustLength) + (showArrow ? TRIANGLE_LENGTH : 0), adjustYOffset, isNeedAdjustHeight, ["left", "right", "top", "bottom"], offsetStyle, positionRelativeElement);
                break;
            case "right,top":
                p = BI.DOM.getComboPosition(combo, this.popupView, (adjustXOffset + adjustLength) + (showArrow ? TRIANGLE_LENGTH : 0), adjustYOffset, isNeedAdjustHeight, ["right", "left", "top", "bottom"], offsetStyle, positionRelativeElement);
                break;
            case "right,innerRight":
                p = BI.DOM.getComboPosition(combo, this.popupView, (adjustXOffset + adjustLength) + (showArrow ? TRIANGLE_LENGTH : 0), adjustYOffset, isNeedAdjustHeight, ["right", "left", "innerRight", "innerLeft", "bottom", "top"], offsetStyle, positionRelativeElement);
                break;
            case "right,innerLeft":
                p = BI.DOM.getComboPosition(combo, this.popupView, (adjustXOffset + adjustLength) + (showArrow ? TRIANGLE_LENGTH : 0), adjustYOffset, isNeedAdjustHeight, ["right", "left", "innerLeft", "innerRight", "bottom", "top"], offsetStyle, positionRelativeElement);
                break;
            case "innerRight":
                p = BI.DOM.getComboPosition(combo, this.popupView, (adjustXOffset + adjustLength) + (showArrow ? TRIANGLE_LENGTH : 0), adjustYOffset, isNeedAdjustHeight, ["innerRight", "innerLeft", "right", "left", "bottom", "top"], offsetStyle, positionRelativeElement);
                break;
            case "innerLeft":
                p = BI.DOM.getComboPosition(combo, this.popupView, (adjustXOffset + adjustLength) + (showArrow ? TRIANGLE_LENGTH : 0), adjustYOffset, isNeedAdjustHeight, ["innerLeft", "innerRight", "left", "right", "bottom", "top"], offsetStyle, positionRelativeElement);
                break;
            case "top,custom":
            case "custom,top":
                p = BI.DOM.getTopAdaptPosition(combo, this.popupView, (adjustYOffset + adjustLength) + (showArrow ? TRIANGLE_LENGTH : 0), isNeedAdjustHeight);
                p.dir = "top";
                break;
            case "custom,bottom":
            case "bottom,custom":
                p = BI.DOM.getBottomAdaptPosition(combo, this.popupView, (adjustYOffset + adjustLength) + (showArrow ? TRIANGLE_LENGTH : 0), isNeedAdjustHeight);
                p.dir = "bottom";
                break;
            case "left,custom":
            case "custom,left":
                p = BI.DOM.getLeftAdaptPosition(combo, this.popupView, (adjustXOffset + adjustLength) + (showArrow ? TRIANGLE_LENGTH : 0));
                delete p.top;
                delete p.adaptHeight;
                p.dir = "left";
                break;
            case "custom,right":
            case "right,custom":
                p = BI.DOM.getRightAdaptPosition(combo, this.popupView, (adjustXOffset + adjustLength) + (showArrow ? TRIANGLE_LENGTH : 0));
                delete p.top;
                delete p.adaptHeight;
                p.dir = "right";
                break;
            default:
                break;
        }

        if ("adaptHeight" in p) {
            this.resetListHeight(p.adaptHeight);
        }

        const width = this.combo.element.outerWidth();
        const height = this.combo.element.outerHeight();
        this.popupView.setDirection && this.popupView.setDirection(p.dir, {
            width,
            height,
            offsetStyle,
            adjustXOffset,
            adjustYOffset,
            offset: this.combo.element.offset(),
        });

        if (supportCSSTransform) {

            const positonedRect = positionRelativeElement.getBoundingClientRect();

            const scaleX = positonedRect.width / positionRelativeElement.offsetWidth;
            const scaleY = positonedRect.height / positionRelativeElement.offsetHeight;

            p.top && (p.top = p.top / scaleY);
            p.left && (p.left = p.left / scaleX);
        }

        if ("left" in p) {
            this.popupView.element.css({
                left: p.left,
            });
        }
        if ("top" in p) {
            this.popupView.element.css({
                top: p.top,
            });
        }
        this.position = p;
        this.popupView.setVisible(isVisible);
    }

    destroyed() {
        Widget._renderEngine.createElement(document)
            .unbind("click." + this.getName())
            .unbind("mousedown." + this.getName())
            .unbind("mousewheel." + this.getName())
            .unbind("mouseenter." + this.getName())
            .unbind("mouseleave." + this.getName());
        Widget._renderEngine.createElement(window)
            .unbind("blur." + this.getName());
        Resizers.remove(this.getName());
        this.popupView && this.popupView._destroy();
        delete needHideWhenAnotherComboOpen[this.getName()];
        delete currentOpenedCombos[this.getName()];
    }
}

Combo.closeAll = () => {
    each(currentOpenedCombos, (i, combo) => {
        if (combo) {
            combo.hideView();
        }
    });
    currentOpenedCombos = {};
    needHideWhenAnotherComboOpen = {};
};