import { Single } from "../0.single";
import { emptyFn, shortcut, extend, isFunction, createWidget, Widget, isObject, Controller } from "../../../core";

/**
 * guy
 * @class BasicButton
 * @extends Single
 *
 * 一般的button父级
 */
@shortcut()
export class BasicButton extends Single {
    static xtype = "bi.basic_button";

    static EVENT_CHANGE = "BasicButton.EVENT_CHANGE";

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

        return extend(conf, {
            _baseCls: `${conf._baseCls || ""} bi-basic-button${conf.invalid ? "" : " cursor-pointer"}${(BI.isIE() && BI.getIEVersion() < 10) ? " hack" : ""}`,
            // el: {} // 可以通过el来创建button元素
            value: "",
            stopEvent: false,
            stopPropagation: false,
            selected: false,
            once: false, // 点击一次选中有效,再点无效
            forceSelected: false, // 点击即选中, 选中了就不会被取消,与once的区别是forceSelected不影响事件的触发
            forceNotSelected: false, // 无论怎么点击都不会被选中
            disableSelected: false, // 使能选中

            shadow: false,
            isShadowShowingOnSelected: false, // 选中状态下是否显示阴影
            trigger: null,
            handler: emptyFn,
            bubble: null,
            debounce: true,
        });
    }

    _init() {
        const opts = this.options;
        opts.selected = isFunction(opts.selected) ? this.__watch(opts.selected, (context, newValue) => {
            this.setSelected(newValue);
        }) : opts.selected;
        super._init(arguments);

        if (opts.shadow) {
            this._createShadow();
        }
        if (opts.level) {
            this.element.addClass(`button-${opts.level}`);
        }
    }

    _initRef() {
        if (this.options.selected === true) {
            this.setSelected(true);
        }
        // 延迟绑定事件，这样可以将自己绑定的事情优先执行
        BI.nextTick(() => {
            !this.isDestroyed() && this.bindEvent();
        });
        super._initRef.apply(this, arguments);
    }

    // 默认render方法
    render() {
        return this.options.el;
    }

    _createShadow() {
        const o = this.options;

        const assertMask = () => {
            if (!this.$mask) {
                this.$mask = createWidget(isObject(o.shadow) ? o.shadow : {}, {
                    type: "bi.layout",
                    cls: "bi-button-mask",
                });
                this.$mask.invisible();
                createWidget({
                    type: "bi.absolute",
                    element: this,
                    items: [{
                        el: this.$mask,
                        left: 0,
                        right: 0,
                        top: 0,
                        bottom: 0,
                    }],
                });
            }
        };

        this.element.mouseup(() => {
            if (!this._hover && !o.isShadowShowingOnSelected) {
                assertMask();
                this.$mask.invisible();
            }
        });
        this.element.on(`mouseenter.${this.getName()}`, e => {
            if (this.element.__isMouseInBounds__(e)) {
                if (this.isEnabled() && !this._hover && (o.isShadowShowingOnSelected || !this.isSelected())) {
                    assertMask();
                    this.$mask.visible();
                }
            }
        });
        this.element.on(`mousemove.${this.getName()}`, e => {
            if (!this.element.__isMouseInBounds__(e)) {
                if (this.isEnabled() && !this._hover) {
                    assertMask();
                    this.$mask.invisible();
                }
            }
        });
        this.element.on(`mouseleave.${this.getName()}`, () => {
            if (this.isEnabled() && !this._hover) {
                assertMask();
                this.$mask.invisible();
            }
        });
    }

    bindEvent() {
        const o = this.options;
        let hand = this.handle();
        if (!hand) {
            return;
        }
        hand = hand.element;

        const getBubble = () => {
            const bubble = o.bubble;
            if (isFunction(bubble)) {
                return bubble();
            }

            return bubble;
        };

        const clk = e => {
            ev(e);
            if (!this.isEnabled() || !this.isValid()) {
                return;
            }
            if (this.isOnce() && this.isSelected()) {
                return;
            }
            if (BI.isKey(o.bubble) || isFunction(o.bubble)) {
                if (BI.isNull(this.combo)) {
                    let popup;
                    createWidget({
                        type: "bi.absolute",
                        element: this,
                        items: [{
                            el: {
                                type: "bi.bubble_combo",
                                trigger: "",
                                // bubble的提示不需要一直存在在界面上
                                destroyWhenHide: true,
                                ref: _ref => {
                                    this.combo = _ref;
                                },
                                el: {
                                    type: "bi.layout",
                                    height: "100%",
                                },
                                popup: {
                                    type: "bi.text_bubble_bar_popup_view",
                                    text: getBubble(),
                                    ref: _ref => {
                                        popup = _ref;
                                    },
                                    listeners: [{
                                        eventName: BI.BubblePopupBarView.EVENT_CLICK_TOOLBAR_BUTTON,
                                        action: (...args) => {
                                            const [v] = args;
                                            this.combo.hideView();
                                            if (v) {
                                                onClick.apply(this, args);
                                            }
                                        },
                                    }],
                                },
                                listeners: [{
                                    eventName: BI.BubbleCombo.EVENT_BEFORE_POPUPVIEW,
                                    action () {
                                        popup.populate(getBubble());
                                    },
                                }],
                            },
                            left: 0,
                            right: 0,
                            bottom: 0,
                            top: 0,
                        }],
                    });
                }
                if (this.combo.isViewVisible()) {
                    this.combo.hideView();
                } else {
                    this.combo.showView();
                }

                return;
            }
            onClick.apply(this, arguments);
        };



        const triggerArr = (o.trigger || "").split(",");
        triggerArr.forEach(trigger => {
            let mouseDown = false;
            let selected = false;
            let interval;
            switch (trigger) {
            case "mouseup":
                hand.mousedown(() => {
                    mouseDown = true;
                });
                hand.mouseup(e => {
                    if (mouseDown === true) {
                        clk(e);
                    }
                    mouseDown = false;
                    ev(e);
                });
                break;
            case "mousedown":
                // let mouseDown = false;
                hand.mousedown(e => {
                    // if (e.button === 0) {
                    Widget._renderEngine.createElement(document).bind(`mouseup.${this.getName()}`, e => {
                        // if (e.button === 0) {
                        if (BI.DOM.isExist(this) && !hand.__isMouseInBounds__(e) && mouseDown === true && !selected) {
                            // self.setSelected(!self.isSelected());
                            this._trigger();
                        }
                        mouseDown = false;
                        Widget._renderEngine.createElement(document).unbind(`mouseup.${this.getName()}`);
                        // }
                    });
                    if (mouseDown === true) {
                        return;
                    }
                    if (this.isSelected()) {
                        selected = true;
                    } else {
                        clk(e);
                    }
                    mouseDown = true;
                    ev(e);
                    // }
                });
                hand.mouseup(e => {
                    // if (e.button === 0) {
                    if (BI.DOM.isExist(this) && mouseDown === true && selected === true) {
                        clk(e);
                    }
                    mouseDown = false;
                    selected = false;
                    Widget._renderEngine.createElement(document).unbind(`mouseup.${this.getName()}`);
                    // }
                });
                break;
            case "dblclick":
                hand.dblclick(clk);
                break;
            case "lclick":
                hand.mousedown(e => {
                    Widget._renderEngine.createElement(document).bind(`mouseup.${this.getName()}`, () => {
                        interval && clearInterval(interval);
                        interval = null;
                        mouseDown = false;
                        Widget._renderEngine.createElement(document).unbind(`mouseup.${this.getName()}`);
                    });
                    if (mouseDown === true) {
                        return;
                    }
                    if (!this.isEnabled() || !this.isValid()) {
                        return;
                    }
                    if (this.isOnce() && this.isSelected()) {
                        return;
                    }
                    interval = setInterval(() => {
                        clk(e);
                    }, 180);
                    mouseDown = true;
                    ev(e);
                });
                break;
            default:
                if (o.stopEvent || o.stopPropagation) {
                    hand.mousedown(e => {
                        ev(e);
                    });
                }
                hand.click(clk);
                // enter键等同于点击
                o.attributes && o.attributes.zIndex >= 0 && hand.keyup(e => {
                    if (e.keyCode === BI.KeyCode.ENTER) {
                        clk(e);
                    }
                });
                break;
            }
        });

        // 之后的300ms点击无效
        const onClick = o.debounce ? BI.debounce(this._doClick, BI.EVENT_RESPONSE_TIME, {
            leading: true,
            trailing: false,
        }) : this._doClick;

        function ev(e) {
            if (o.stopEvent) {
                e.stopEvent();
            }
            if (o.stopPropagation) {
                e.stopPropagation();
            }
        }
    }

    _trigger(e) {
        const o = this.options;
        if (!this.isEnabled()) {
            return;
        }
        if (!this.isDisableSelected()) {
            this.isForceSelected() ? this.setSelected(true) :
                (this.isForceNotSelected() ? this.setSelected(false) :
                    this.setSelected(!this.isSelected()));
        }
        if (this.isValid()) {
            const v = this.getValue();
            o.handler.call(this, v, this, e);
            this.fireEvent(Controller.EVENT_CHANGE, BI.Events.CLICK, v, this, e);
            this.fireEvent(BasicButton.EVENT_CHANGE, v, this);
            if (o.action) {
                BI.Actions.runAction(o.action, "click", o, this);
            }
            BI.Actions.runGlobalAction("click", o, this);
        }
    }

    _doClick(e) {
        if (!this.isEnabled() || !this.isValid()) {
            return;
        }
        const isIntercepted = this.beforeClick(e);
        // 如果事件已经被消费掉了，就不再触发点击事件
        if (isIntercepted) {
            return;
        }

        this._trigger(e);
        if (this.isEnabled() && this.isValid()) {
            this.doClick(e);
        }
    }

    /**
     * 子类可以得写这个方法，如果返回为 true，则可以阻止 handler 的触发
     */
    beforeClick() {

    }

    doClick() {

    }

    handle() {
        return this;
    }

    hover() {
        this._hover = true;
        this.handle().element.addClass("hover");
        if (this.options.shadow) {
            this.$mask && this.$mask.setVisible(true);
        }
    }

    dishover() {
        this._hover = false;
        this.handle().element.removeClass("hover");
        if (this.options.shadow) {
            this.$mask && this.$mask.setVisible(false);
        }
    }

    setSelected(b) {
        const o = this.options;
        o.selected = b;
        if (b) {
            this.handle().element.addClass("active");
        } else {
            this.handle().element.removeClass("active");
        }
        if (o.shadow && !o.isShadowShowingOnSelected) {
            this.$mask && this.$mask.setVisible(false);
        }
        this.options.setSelected && this.options.setSelected.call(this, b);
    }

    isSelected() {
        return this.options.selected;
    }

    isOnce() {
        return this.options.once;
    }

    isForceSelected() {
        return this.options.forceSelected;
    }

    isForceNotSelected() {
        return this.options.forceNotSelected;
    }

    isDisableSelected() {
        return this.options.disableSelected;
    }

    setText(text) {
        this.options.text = text;
        this.options.setText && this.options.setText.call(this, text);
    }

    getText() {
        return this.options.text;
    }

    _setEnable(enable) {
        super._setEnable(...arguments);
        if (enable === true) {
            this.element.removeClass("base-disabled disabled");
        } else if (enable === false) {
            this.element.addClass("base-disabled disabled");
        }
        if (!enable) {
            if (this.options.shadow) {
                this.$mask && this.$mask.setVisible(false);
            }
        }
    }

    empty() {
        Widget._renderEngine.createElement(document).unbind(`mouseup.${this.getName()}`);
        super.empty(...arguments);
    }
}