import Vue from 'vue'
import { regInfo } from '@/api/dataSearch'

let sourceLayer = undefined;
let clickedLineIds = [];

export function loadVectorLayer(layerId, features = ["line", "symbol"], colors = ["#FEFEFE", "#FF0000"], visibility = "visible", mapId = "home", workspace = 'dsds') {
    // 添加数据源
    const sourceId = `vector-${layerId}`;
    let source = Vue.config.maps[mapId].getSource(sourceId);
    if (!source)
        Vue.config.maps[mapId].addSource(sourceId, {
            type: 'vector',
            scheme: 'tms',
            tiles: [`${Vue.config.baseUrl}/geoserver/gwc/service/tms/1.0.0/${workspace}:${layerId}@EPSG:900913@pbf/{z}/{x}/{y}.pbf`],
            minzoom: 0,
            maxzoom: 30,
            generateId: true
        });

    let i = 0;
    features.forEach((feature) => {
        loadVectorFeature(layerId, feature, colors[i++], visibility, mapId);
    });
}

export async function loadVectorFeature(layerId, feature, color, visibility, mapId) {
    let sourceId = `vector-${layerId}`;
    // symbol
    // Slot 是 Mapbox 样式规范中的一个概念，它定义了图层在渲染过程中的位置和顺序。
    let slot = "foreground";
    let layout = {
        "symbol-placement": "point",
        "text-rotation-alignment": "auto",
        "text-field": ["get", "name"],
        "text-font": ["literal", ["Arial Unicode MS Regular", "DIN Offc Pro Italic", "Open Sans Regular"]],
        "text-size": 12,
        "text-variable-anchor": ["top", "bottom", "left", "right"],
        "text-radial-offset": 1,
        "text-justify": "auto",
        "text-optional": true,
        "text-allow-overlap": false,
        "text-ignore-placement": false,
        'symbol-spacing': 1000, // 像素间距，增大值可减少标注密度
        // 'text-max-angle': 300, // 角度越大，标注越少
        "icon-optional": true,
        "icon-allow-overlap": false,
        "icon-ignore-placement": false,
        "icon-image": "dot.png",
        "icon-size": 1,
        "visibility": visibility
    };
    let paint = {
        "text-color": color,
        "text-halo-color": "#FFFFFF",
        "text-halo-width": 0.1,
        "icon-opacity": 1,
        // slot: "middle"
    };
    if (feature === "line") {
        slot = "top";
        layout = {
            "visibility": visibility
        };
        paint = {
            "line-opacity": 1,
            "line-width": [
                "case",
                ["boolean", ["feature-state", "hover"], false],
                4,
                ["boolean", ["feature-state", "click"], false],
                2,
                1.8
            ],
            "line-color": [
                "case",
                ["boolean", ["feature-state", "click"], false],
                "red",
                ["boolean", ["feature-state", "hover"], false],
                "yellow",
                color
            ]
        }
    }

    let layer = Vue.config.maps[mapId].getLayer(`${sourceId}-${feature}`);
    if (!layer) {
        Vue.config.maps[mapId].addLayer({
            id: `${sourceId}-${feature}`,
            'type': feature,
            'source': sourceId,
            'source-layer': layerId,
            'layout': layout,
            'paint': paint,
            // 'slot': 'foreground'
        });
    }

    // 点击可交互的图层，显示相关信息
    await setHighlight(`${sourceId}-${feature}`, sourceId, mapId);
    changeCursor(`${sourceId}-${feature}`, mapId);
    await showTrackInfo(`${sourceId}-${feature}`, mapId);

    return sourceId;
}

export function setHighlight(layerId, sourceId, mapId = "home") {
    let hoveredLineId = null;
    let clickedLineId = null;
    Vue.config.maps[mapId].on('click', layerId, (e) => {
        if (!e.features || e.features.length <= 0)
            return;
        sourceLayer = e.features[0].sourceLayer;
        // 获取当前单击的线的选择状态
        let state = Vue.config.maps[mapId].getFeatureState({
            source: sourceId,
            sourceLayer: sourceLayer,
            id: e.features[0].id
        });
        if (clickedLineId) {
            Vue.config.maps[mapId].setFeatureState({ source: sourceId, sourceLayer: sourceLayer, id: clickedLineId }, { click: false });
        }
        clickedLineId = e.features[0].id;
        if (state.click === true) {
            // 再次单击时取消选择
            Vue.config.maps[mapId].setFeatureState({ source: sourceId, sourceLayer: sourceLayer, id: clickedLineId }, { click: false });
            // 隐藏信息框
            // document.getElementById("cable-overlay")!.style.display = 'none';
            // 过滤掉当前单击的线
            clickedLineIds = clickedLineIds.filter((item) => item !== clickedLineId);
        } else {
            Vue.config.maps[mapId].setFeatureState({ source: sourceId, sourceLayer: sourceLayer, id: clickedLineId }, { click: true });
            // 显示信息框
            // if (sourceId === 'GMSL Cable Data')
            //     document.getElementById("cable-overlay")!.style.display = 'block';
            // 单击时加入选择列表（用于单击 ESC 键时取消选择状态）
            clickedLineIds.push(clickedLineId);
            // document.removeEventListener("keydown", removeHighlight, true);
            document.addEventListener("keydown", (e) => {
                removeHighlight(e, sourceId);
            }, { once: true }); // once：一个布尔值，表示 listener 在添加之后最多只调用一次。如果为 true，listener 会在其被调用之后自动移除。
            // }, true);
        }
    });

    // When the user moves their mouse over the state-fill layer, we'll update the feature state for the feature under the mouse.
    Vue.config.maps[mapId].on('mousemove', layerId, (e) => {
        if (e.features.length <= 0)
            return;
        sourceLayer = e.features[0].sourceLayer;
        if (hoveredLineId) {
            Vue.config.maps[mapId].setFeatureState(
                { source: sourceId, sourceLayer: sourceLayer, id: hoveredLineId },
                { hover: false }
            );
        }
        hoveredLineId = e.features[0].id;
        Vue.config.maps[mapId].setFeatureState(
            { source: sourceId, sourceLayer: sourceLayer, id: hoveredLineId },
            { hover: true }
        );
    });

    // When the mouse leaves the state-fill layer, update the feature state of the previously hovered feature.
    Vue.config.maps[mapId].on('mouseleave', layerId, () => {
        if (hoveredLineId && sourceLayer) {
            Vue.config.maps[mapId].setFeatureState(
                { source: sourceId, sourceLayer: sourceLayer, id: hoveredLineId },
                { hover: false }
            );
        }
        hoveredLineId = null;
    });
}

export function changeCursor(layerId, mapId = "home", cursor = "pointer") {
    Vue.config.maps[mapId].on("mouseenter", layerId, () => {
        Vue.config.maps[mapId].getCanvas().style.cursor = cursor;
    });

    Vue.config.maps[mapId].on("mouseleave", layerId, () => {
        Vue.config.maps[mapId].getCanvas().style.cursor = "";
    });
}

export function showTrackInfo(layerId, mapId = "home") {
    Vue.config.maps[mapId].on("click", layerId, async (e) => {
        // 禁止点击事件穿透 - 判断同一个 event 是否已经触发，用于避免图层内标记点注册的点击事件重复触发（点位分布密集时容易出现）
        if (e.defaultPrevented)
            return;
        // 标记该 event 已触发，禁止点击事件穿透
        e.preventDefault();

        let coordinate = e.lngLat;
        let match = layerId.match(/vector-(.*)-[(symbol)|(line)]/);
        if (!match)
            return;
        const voyageId = match[1];
        regInfo({ voyage_name: voyageId }).then(res => {
            const info = res.map.voyage;
            const description = `
            <table class="popup-table" style="min-width:380px;">
                <thead>
                <tr>
                  <td colspan="2"><a style="color:#0000FF" target="_balnk" title="点击查看航次详情" href="${Vue.config.baseUrl}/ds/#/container/dataDetail?voyage_name=${info.voyage_name}">航次信息</a></td>
                </tr>
                </thead>
                <tr>
                  <td>航次编号: <b>${info.voyage_name}</b></td>
                  <td>航次首席: <b>${info.voyage_officer}</b></td>
                </tr>
                <tr>
                  <td>科考船舶: <b>${info.ship_name}</b></td>
                  <td>资助机构: <b>${info.funding_org}</b></td>
                </tr>
                <tr>
                  <td>离港日期: <b>${info.voyage_start_date}</b></td>
                  <td>返港日期: <b>${info.voyage_end_date}</b></td>
                </tr>
                <tr>
                  <td colspan="2">航次概况: <b>${info.voyage_remark}</b></td>
                </tr>
            </table>`;

            showPopupDetails(mapId, coordinate, description, "420px");
        })
    });
}

export function showPopupDetails(mapId, coordinate, description, maxWidth = "300px", closeButton = true, closeOnClick = true, options = {}) {
    new window.mapboxgl.Popup({ offset: {}, className: "my-class", closeButton: closeButton, closeOnClick: closeOnClick })
        .setLngLat(coordinate)
        .setHTML(description)
        .setOffset(10)
        .setMaxWidth(maxWidth)
        .addTo(Vue.config.maps[mapId]);
}