import store from '@/store'
import dayjs from "dayjs";

function watermark(settings) {

    //默认设置
    let defaultSettings = {
        watermark_txt: "text",
        watermark_x: 20,//水印起始位置x轴坐标
        watermark_y: 20,//水印起始位置Y轴坐标
        watermark_rows: 20,//水印行数
        watermark_cols: 20,//水印列数
        watermark_x_space: 100,//水印x轴间隔
        watermark_y_space: 50,//水印y轴间隔
        watermark_color: '#aaa',//水印字体颜色
        watermark_alpha: 0.4,//水印透明度
        watermark_fontsize: '20px',//水印字体大小
        //watermark_font:'微软雅黑',//水印字体
        watermark_font: 'Microsoft JhengHei',//水印字体
        watermark_width: 120,//水印宽度
        watermark_height: 120,//水印长度
        watermark_angle: 15//水印倾斜度数
        //watermark_angle:"16px Microsoft JhengHei
    };
    //采用配置项替换默认值，作用类似jquery.extend
    if (arguments.length === 1 && typeof arguments[0] === "object") {
        let src = arguments[0] || {};
        for (let key in src) {
            if (src[key] && defaultSettings[key] && src[key] === defaultSettings[key]) {
                continue;
            } else if (src[key]) {
                defaultSettings[key] = src[key];
            }
        }
    }

    let oTemp = document.createDocumentFragment();

    //获取页面最大宽度
    let page_width = Math.max(document.body.scrollWidth, document.body.clientWidth);
    let cutWidth = page_width * 0.0150;
    page_width = page_width - cutWidth;
    //获取页面最大高度
    let page_height = Math.max(document.body.scrollHeight, document.body.clientHeight);//+450
    // let page_height = document.body.scrollHeight+document.body.scrollTop;
    //如果将水印列数设置为0，或水印列数设置过大，超过页面最大宽度，则重新计算水印列数和水印x轴间隔
    if (defaultSettings.watermark_cols == 0 || (parseInt(defaultSettings.watermark_x + defaultSettings.watermark_width * defaultSettings.watermark_cols + defaultSettings.watermark_x_space * (defaultSettings.watermark_cols - 1)) > page_width)) {
        defaultSettings.watermark_cols = parseInt((page_width - defaultSettings.watermark_x + defaultSettings.watermark_x_space) / (defaultSettings.watermark_width + defaultSettings.watermark_x_space));
        defaultSettings.watermark_x_space = parseInt((page_width - defaultSettings.watermark_x - defaultSettings.watermark_width * defaultSettings.watermark_cols) / ((defaultSettings.watermark_cols - 1) == 0 ? 1 : (defaultSettings.watermark_cols - 1)));
    }
    //如果将水印行数设置为0，或水印行数设置过大，超过页面最大长度，则重新计算水印行数和水印y轴间隔
    if (defaultSettings.watermark_rows == 0 || (parseInt(defaultSettings.watermark_y + defaultSettings.watermark_height * defaultSettings.watermark_rows + defaultSettings.watermark_y_space * (defaultSettings.watermark_rows - 1)) > page_height)) {
        defaultSettings.watermark_rows = parseInt((defaultSettings.watermark_y_space + page_height - defaultSettings.watermark_y) / (defaultSettings.watermark_height + defaultSettings.watermark_y_space));
        defaultSettings.watermark_y_space = parseInt(((page_height - defaultSettings.watermark_y) - defaultSettings.watermark_height * defaultSettings.watermark_rows) / (defaultSettings.watermark_rows - 1));
    }
    let x;
    let y;
    for (let i = 0; i < defaultSettings.watermark_rows; i++) {
        y = defaultSettings.watermark_y + (defaultSettings.watermark_y_space + defaultSettings.watermark_height) * i;
        for (let j = 0; j < defaultSettings.watermark_cols; j++) {

            x = defaultSettings.watermark_x + (defaultSettings.watermark_width + defaultSettings.watermark_x_space) * j;

            let mask_div = document.createElement('div');
            mask_div.id = 'mask_div' + i + j;
            mask_div.className = 'mask_div';
            mask_div.appendChild(document.createTextNode(defaultSettings.watermark_txt));
            //设置水印div倾斜显示
            mask_div.style.webkitTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
            mask_div.style.MozTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
            mask_div.style.msTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
            mask_div.style.OTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
            mask_div.style.transform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
            mask_div.style.visibility = "";
            mask_div.style.position = "absolute";
            mask_div.style.left = x + 'px';
            mask_div.style.top = y + 'px';
            mask_div.style.overflow = "hidden";
            mask_div.style.zIndex = "9999";
            mask_div.style.pointerEvents = 'none';//pointer-events:none  让水印不遮挡页面的点击事件
            //mask_div.style.border="solid #eee 1px";
            mask_div.style.opacity = defaultSettings.watermark_alpha;
            mask_div.style.fontSize = defaultSettings.watermark_fontsize;
            mask_div.style.fontFamily = defaultSettings.watermark_font;
            mask_div.style.color = defaultSettings.watermark_color;
            mask_div.style.textAlign = "center";
            mask_div.style.width = defaultSettings.watermark_width + 'px';
            mask_div.style.height = defaultSettings.watermark_height + 'px';
            mask_div.style.display = "block";
            mask_div.style.fontWeight = "bold";
            oTemp.appendChild(mask_div);
        }
    }
    document.body.appendChild(oTemp);
}

window.addEventListener('resize', function () {
    let namelist = document.querySelectorAll(".mask_div");
    let len = namelist.length;
    for (let i = 0; i < len; i++) {
        document.body.removeChild(namelist[i]);
    }
    setWater();
})

function setWater() {
    // 页面水印的设置
    let name = store.state.user.info.currentUser;
    name += "（" + store.state.user.info.account + "）";
    let date = new Date();
    name += date.getFullYear() + '年' + (date.getMonth() + 1) + '月' + date.getDate() + '日' + ' ' + date.getHours() + ':' + date.getMinutes() + ':' + date.getMilliseconds();
    let setting = {
        watermark_txt: name,
        watermark_color: '#000',
        watermark_alpha: 0.1,
        watermark_x: 80,
        watermark_x_space: 160,
        watermark_y_space: 160,
        watermark_fontsize: "20px",
        watermark_angle: 45,
        watermark_width: 260,
        watermark_height: 120
    };
    watermark(setting);
}

export default function () {
    setWater();
}



