let time_format = "YYYY-MM-DD HH:mm:ss";

//获取地址栏参数
function getUrlParam(name) {
    let reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)"); //构造一个含有目标参数的正则表达式对象
    let r = window.location.search.substr(1).match(reg);  //匹配目标参数
    if (r != null) return decodeURI(r[2]);
    return null; //返回参数值
}

//构建文章列表
function build_article_list(articles, position) {
    position.empty();
    $.each(articles, function (index, item) {
        let h = $("<h4><a href='article_detail.html?aid=" + item.id + "'>" + item.title + "</a><span>" + (item.top ? "  [置顶]" : "") + "</span></h4>");
        let p1 = $("<p></p>").append(item.summary);
        let p2 = $("<p></p>").append("<span>分类：" + item.category.name + "</span><br>").append("<span>" + item.simpleUser.username + "</span> 最后修改于 <span>" + moment(new Date(item.lastEditTime)).format(time_format) + "</span>");
        $("<div></div>").css("padding-bottom", "3px").css("padding-top", "3px").append(h).append(p1).append(p2).appendTo(position);
    });
}

//构建分页数据
function build_page_info(pageIndex, pageSize, totalCount) {
    let _pages = Math.floor((totalCount - 1) / pageSize) + 1;
    let result = {
        page: pageIndex,
        size: pageSize,
        total: totalCount,
        pages: _pages,
        hasPreviousPage: pageIndex !== 1,
        hasNextPage: pageIndex < _pages,
        beforePages: [],
        afterPages: [],
    }
    for (let i = (pageIndex <= 3 ? 1 : pageIndex - 2); i < pageIndex; i++) {
        result.beforePages.push(i);
    }
    for (let i = pageIndex + 1; i <= (pageIndex <= result.pages - 2 ? pageIndex + 2 : _pages); i++) {
        result.afterPages.push(i);
    }
    return result;
}


//构建分页条
function build_page_nav(page_info, position) {
    position.empty();
    let ul = $("<ul></ul>").addClass("pagination");
    let firstPageLi = $("<li></li>").append("<a>首页</a>").val(1);
    let prePageLi = $("<li></li>").append($("<a></a>").append("&laquo;")).val(page_info.page - 1);
    if (!page_info.hasPreviousPage) {
        firstPageLi.addClass("disabled");
        prePageLi.addClass("disabled");
    }
    let lastPageLi = $("<li></li>").append($("<a></a>").append("末页")).val(page_info.pages);
    let nextPageLi = $("<li></li>").append($("<a></a>").append("&raquo;")).val(page_info.page + 1);
    if (page_info.hasNextPage === false) {
        lastPageLi.addClass("disabled");
        nextPageLi.addClass("disabled");
    }
    ul.append(firstPageLi).append(prePageLi);
    $.each(page_info.beforePages, function (index, item) {
        let numLi = $("<li></li>").append("<a>" + item + "</a>").val(item);
        numLi.appendTo(ul);
    });
    ul.append("<li class='active'><a>" + page_info.page + "</a></li>");
    $.each(page_info.afterPages, function (index, item) {
        let numLi = $("<li></li>").append("<a>" + item + "</a>").val(item);
        numLi.appendTo(ul);
    });
    ul.append(nextPageLi).append(lastPageLi);
    let navEle = $("<nav></nav>").append(ul);
    navEle.appendTo(position);
}

//注销
function logout() {
    $.ajax("/logout", {
        type: "POST",
        success: function () {
            $(window).attr('location', '/login.html');
        },
        statusCode: {
            403: function () {
                $(window).attr('location', '/login.html');
            }
        }
    })
}

//检查是否已登录
function check_login() {
    $.ajax({
        url: "/account/online",
        type: "GET",
        async: false,
        statusCode: {
            403: function () {
                $(window).attr('location', '/login.html');
            }
        }
    });
}

/**
 * str { String } 完整字符串
 * target { String } 目标对象，要查找的字符串
 */
function searchStrEach(str, target) {
    let sum = 0;
    for (let key of str) {
        if (key == target) {
            sum++;
        }
    }
    return sum;
}

/**
 * 获取邮箱验证码
 */
function getCode(flag) {
    let _data = "email=" + $("#new_email").val();
    let btn = $(this);
    btn.attr("disabled", true);
    if (flag) {
        _data += "qq=" + $("#qq_number").val() + "&signup_code=" + $("#signup_code").val() + "&signup=true";
    } else {
        _data += "&signup=false";
    }
    $.ajax("/account/email_code", {
        type: "POST",
        data: _data,
        dataType: 'json',
        success: function () {
            toastr.success("邮件已发送，请查收");
            setTimeout(function () {
                btn.attr('disabled', false);
            }, 30000);
        },
        statusCode: {
            400: function (XMLHttpRequest) {
                toastr.warning(XMLHttpRequest.responseJSON);
                btn.attr('disabled', true);
            },
            401: function (XMLHttpRequest) {
                toastr.warning(XMLHttpRequest.responseJSON);
                btn.attr('disabled', true);
            },
            403: function (XMLHttpRequest) {
                toastr.warning(XMLHttpRequest.responseJSON);
                btn.attr('disabled', true);
            }
        }
    })
}

//显示捐赠模态框
function show_donate() {
    $("#donate_form")[0].reset();
    $("#donate_modal").modal({
        backdrop: "static"
    });
}

//捐赠表单提交点击事件
$("#donate_btn").on("click", function () {
    $("#donate_form").submit();
});

//搜索按钮点击事件
function to_search() {
    $(window).attr("location","/search.html?key=" + $("#search_key").val());
}