'use strict'

const init = (L) => {
    L.CustomPopup = L.Popup.extend({
        _initLayout: () => {
            // 此处生成的容器，Leaflet会根据其类名自动适配Transform，匹配样式，所以如果要自定义的话，该部分样式要自己重写，我这里只解决了自适应容器的问题，以下采用原生容器，所以后面我会加上样式覆盖。
            let prefix = 'leaflet-popup'
            let container = (this._container = L.DomUtil.create(
                    'div',
                    prefix + ' ' + (this.options.className || '') + ' leaflet-zoom-animated'
                ))
            let wrapper = container
            this._contentNode = L.DomUtil.create('div', prefix + '-content', wrapper)
            L.DomEvent.disableClickPropagation(wrapper)
                .disableScrollPropagation(this._contentNode)
                .on(wrapper, 'contextmenu', L.DomEvent.stopPropagation)
            this._tipContainer = L.DomUtil.create(
                'div',
                prefix + '-tip-container',
                container
            )
            this._tip = L.DomUtil.create('div', prefix + '-tip', this._tipContainer)
        },
        // 位置更新
        _updatePosition: () => {
            if (!this._map) {
                return
            }
            let pos = this._map.latLngToLayerPoint(this._latlng)
            let offset = L.point(this.options.offset)
            let anchor = [0, 0]
            if (this._zoomAnimated) {
                setPosition(this._container, pos.add(anchor))
            } else {
                offset = offset.add(pos).add(anchor)
            }
            let bottom = (this._containerBottom = -offset.y)
            let left = (this._containerLeft =
                    -Math.round(this._containerWidth / 2) + offset.x)
            // bottom position the popup in case the height of the popup changes (images loading etc)
            this._container.style.bottom = bottom + 'px'
            this._container.style.left = left + 'px'
        },
        // 重写层级变化触发更新
        _animateZoom: (e) => {
            let pos = this._map._latLngToNewLayerPoint(this._latlng, e.zoom, e.center)
            let anchor = [0, 0]
            setPosition(this._container, pos.add(anchor))
        }
    })

// 重写setTransform，由于不再固定宽度，所以增加translateX(-50%)水平居中
    const setTransform = (el, offset, scale) => {
        let pos = offset || new L.Point(0, 0)
        el.style[L.DomUtil.TRANSFORM] =
            (L.Browser.ie3d
                ? 'translate(' + pos.x + 'px,' + pos.y + 'px,0) translateX(-50%)'
                : 'translate3d(' + pos.x + 'px,' + pos.y + 'px,0) translateX(-50%)') +
            (scale ? ' scale(' + scale + ')' : '')
    }
// 因为重写了setTransform，所以setPosition也要重新指向方法
    const setPosition = (el, point) => {
        el._leaflet_pos = point
        if (L.Browser.any3d) {
            setTransform(el, point)
        } else {
            el.style.left = point.x + 'px'
            el.style.top = point.y + 'px'
        }
    }
}
export default {
    init
}