Ext.define('saas.util.ViewUtil', {
    statics: {

        // 请求页面组件接口模板
        getCfgUrl: '/api/ui/customize/getConfig?name={viewName}',
        // 保存自定义配置
        saveCfgUrl: '/api/ui/customize/saveConfig',
        // 模板替换正则
        urlRe: /(.*){viewName}(.*)/g,
        // 从表允许自定义的配置名
        DETAIL_ALLOW_CUS_FIELDS: ['text', 'hidden', 'index', 'width'],

        getViewConfig: function (viewName) {
            let me = this,
                url = me.getCfgUrl.replace(me.urlRe, '$1' + viewName);
            return saas.util.BaseUtil.request({
                    url,
                    async: true
                })
                .then(function (res) {
                    let cfg = me.decodeViewConfig(res.data);
                    return cfg;
                })
                .catch(function (e) {
                    saas.util.BaseUtil.showErrorToast('读取界面配置失败：' + e.message);
                    return null;
                });
        },

        decodeViewConfig: function (cfgs) {
            cfgs = cfgs || [];
            let cfg = {};
            for (let i = 0; i < cfgs.length; i++) {
                let c = cfgs[i],
                    pos = c.position;
                if (pos) {
                    cfg[pos] = JSON.parse(c.content);
                }
            }

            return cfg;
        },

        applyColumns: function (viewName, columns) {
            let me = this;

            return me.getViewConfig(viewName)
                .then(function (cfg) {
                    let newColumns = [];

                    newColumns = me.initColumnItems(columns);
                    if (cfg) {
                        return me.applyColumnConfig(newColumns, cfg['columns']);
                    } else {
                        return newColumns;
                    }
                });
        },

        /**
         * 为列字段添加可能会被自定义的初始化配置
         */
        initColumnItems: function (columns) {
            columns = Ext.isArray(columns) ? columns : [];
            let colCount = 1,
                newColumns = [];

            Ext.Array.each(columns, function (c, j) {
                let col = Object.assign({}, c);
                if (col.hidden || col.width == 0 || !col.dataIndex) {
                    Ext.applyIf(col, {
                        index: -1,
                        initHidden: true
                    });
                } else {
                    Ext.applyIf(col, {
                        text: '',
                        hidden: false,
                        index: colCount++,
                        allowBlank: true,
                        width: 100,
                        initHidden: false
                    });
                }
                newColumns.push(col);
            });

            Ext.Array.sort(newColumns, function (a, b) {
                return a.index - b.index;
            });

            return newColumns;
        },

        /**
         * 应用自定义配置到列字段
         */
        applyColumnConfig: function (columns, cusColumns) {
            let me = this;

            Ext.Array.each(cusColumns, function (cusCol) {
                let col = Ext.Array.findBy(columns, function (col) {
                    return col.dataIndex == cusCol.dataIndex;
                });
                if (!!col) {
                    let keys = Ext.Object.getAllKeys(cusCol);
                    keys.map(function (k) {
                        if (me.DETAIL_ALLOW_CUS_FIELDS.indexOf(k) != -1) {
                            if (k != 'hidden' || col.allowBlank) {
                                col['_init_' + k] = col.hasOwnProperty('_init_' + k) ? col['_init_' + k] : col[k];
                                col[k] = cusCol[k];
                            }
                        }
                    });

                }
            });

            Ext.Array.sort(columns, function (a, b) {
                return a.index - b.index;
            });

            return columns;
        },

        saveViewConfig: function (name, position, content) {
            let me = this;
            return saas.util.BaseUtil.request({
                url: me.saveCfgUrl,
                params: JSON.stringify({
                    name: name,
                    position: position,
                    content: JSON.stringify(content)
                }),
                method: 'POST',
            });
        }
    }
});