/**
 * 数据库备份 / 还原
 *
 * 权限按钮用完整权限名（database:backup / database:restore / database:delete / database:optimize），
 * 表格渲染后由 auth.filterDom() 移除无权限按钮。
 */
layui.define(['table', 'layer', 'form', 'util', 'element', 'auth', 'http', 'jquery'], function (exports) {
    var table = layui.table,
        layer = layui.layer,
        form  = layui.form,
        auth  = layui.auth,
        http  = layui.http,
        $     = layui.jquery;

    // 注意：http 的 baseURL 为空，URL 由浏览器按「当前页面所在目录」解析，
    // 核心后台页面的目录就是 /admin/<controller>/，所以这里只写动作名（纯相对），
    // 写成 'database/index' 会被解析成 /admin/database/database/index（404）。
    var FUNC = {
        index:    'index',
        backup:   'backup',
        recovery: 'recovery',
        delete:   'delete',
        optimize: 'optimize',
        download: 'download'
    };

    /**
     * 统一的响应处理：Result 返回 {code, message, data, count}
     */
    function parse(res) {
        return {
            code:  res.code,
            msg:   res.message,
            count: res.count || 0,
            data:  res.data || []
        };
    }

    /**
     * 提交型请求
     */
    function post(url, data, okTip, done) {
        var loading = layer.load(2);
        http.post(url, data).then(function (res) {
            layer.close(loading);
            if (res && res.code === 0) {
                layer.msg(okTip || res.message || '操作成功', {icon: 1});
                if (done) { done(res.data); }
            } else {
                layer.msg((res && res.message) || '操作失败', {icon: 2});
            }
        }).catch(function (err) {
            layer.close(loading);
            layer.msg('请求失败：' + (err && err.message ? err.message : '网络异常'), {icon: 2});
        });
    }

    /**
     * 取当前勾选的表名
     */
    function checkedTables() {
        var rows = table.checkStatus('tableList').data || [];
        var names = [];
        for (var i = 0; i < rows.length; i++) {
            names.push(rows[i].name);
        }
        return names;
    }

    var obj = {
        renderTable: function () {
            table.render({
                elem: '#tableList',
                url: FUNC.index,
                where: {type: 'table'},
                toolbar: '#tableBar',
                defaultToolbar: ['filter'],
                method: 'get',
                cols: [[
                    {type: 'checkbox', width: 50},
                    {field: 'name', title: '表名', minWidth: 220},
                    {field: 'comment', title: '备注', minWidth: 160},
                    {field: 'engine', title: '引擎', width: 100},
                    {field: 'rows', title: '行数', width: 110, sort: true},
                    {field: 'size_text', title: '大小', width: 110}
                ]],
                page: true,
                limit: 15,
                limits: [15, 30, 50, 100],
                response: {statusCode: 0},
                parseData: parse,
                done: function () {
                    var view = $('#tableList').next('.layui-table-view');
                    auth.filterDom(view);
                    auth.filterDom('.layui-btn[data-perm]');
                }
            });
        },

        renderBackup: function () {
            table.render({
                elem: '#backupList',
                url: FUNC.index,
                where: {type: 'backup'},
                toolbar: '#backupBar',
                method: 'get',
                cols: [[
                    {field: 'name', title: '备份名', minWidth: 220},
                    {field: 'parts', title: '分卷', width: 80},
                    {field: 'size_text', title: '大小', width: 110},
                    {field: 'time_text', title: '时间', width: 180, sort: true},
                    {title: '操作', width: 190, templet: '#backupAction', fixed: 'right'}
                ]],
                page: true,
                limit: 15,
                response: {statusCode: 0},
                parseData: parse,
                done: function () {
                    var view = $('#backupList').next('.layui-table-view');
                    auth.filterDom(view);
                    auth.filterDom('.layui-btn[data-perm]');
                }
            });
        },

        events: function () {
            // 数据表工具条
            table.on('toolbar(tableList)', function (o) {
                if (o.event === 'backupSelected' || o.event === 'backupAll') {
                    var names = o.event === 'backupAll' ? [] : checkedTables();
                    if (o.event === 'backupSelected' && names.length === 0) {
                        return layer.msg('请先勾选要备份的表', {icon: 2});
                    }
                    layer.confirm(
                        o.event === 'backupAll' ? '确认备份全部数据表？' : '确认备份选中的 ' + names.length + ' 张表？',
                        {title: '备份确认'},
                        function (index) {
                            layer.close(index);
                            post(FUNC.backup, {tables: names, part_size: 2097152}, '备份完成', function () {
                                table.reload('backupList');
                            });
                        }
                    );
                } else if (o.event === 'optimize') {
                    var opts = checkedTables();
                    if (opts.length === 0) {
                        return layer.msg('请先勾选要优化的表', {icon: 2});
                    }
                    post(FUNC.optimize, {tables: opts}, '优化完成', function () {
                        table.reload('tableList');
                    });
                }
            });

            // 备份记录工具条
            table.on('toolbar(backupList)', function (o) {
                if (o.event === 'reload') {
                    table.reload('backupList');
                }
            });

            // 备份记录行操作
            table.on('tool(backupList)', function (o) {
                if (o.event === 'download') {
                    window.open(FUNC.download + '?name=' + encodeURIComponent(o.data.name));
                } else if (o.event === 'recovery') {
                    layer.confirm(
                        '还原会覆盖当前同名表的数据，确定继续？<br><span style="color:#ff5722">建议先做一次新备份</span>',
                        {title: '危险操作', btn: ['确定还原', '取消']},
                        function (index) {
                            layer.close(index);
                            post(FUNC.recovery, {name: o.data.name}, '还原完成', function () {
                                table.reload('tableList');
                            });
                        }
                    );
                } else if (o.event === 'delete') {
                    layer.confirm('确定删除该备份？', {title: '提示'}, function (index) {
                        layer.close(index);
                        post(FUNC.delete, {name: o.data.name}, '已删除', function () {
                            table.reload('backupList');
                        });
                    });
                }
            });

            // 搜索
            form.on('submit(data-search-btn)', function (o) {
                table.reload('tableList', {where: {keyword: o.field.keyword}, page: {curr: 1}});
                return false;
            });
            $('#btn-reset').on('click', function () {
                setTimeout(function () {
                    table.reload('tableList', {where: {keyword: ''}, page: {curr: 1}});
                }, 10);
            });

            // 切 tab 时修正列宽（隐藏时渲染的表格宽度会算错）
            layui.element.on('tab(dbTab)', function () {
                table.resize('tableList');
                table.resize('backupList');
            });
        }
    };

    obj.renderTable();
    obj.renderBackup();
    obj.events();

    exports('database', obj);
});