import _ from 'lodash'
import {invokeMethod} from "./utils"
import {windows} from './Defaults'
import {lookupScope} from "./lib/lib";
import {scopeOnLoad} from './lib/config'

export class Scope {

    /**
     * 业务模块的唯一编号
     */
    id = _.uniqueId('scope_')

    originalVjson

    /**
     * 一个 ExtJS 能接受的配置对象
     */
    vjson

    /**
     * 原始 vjsonModel 对象
     */
    model

    /**
     * 双向绑定的模型对象
     */
    viewModel

    /**
     * 构建完成之后的 Ext控件句柄
     */
    _handle

    /**
     * 与 watch 装饰器配合使用.
     * viewModel 属性更改时触发成员方法
     */
    _watchList

    /**
     * 页面显示的时候带的参数 在设计刷新的时候使用
     */
    _vjsonOption
    _dataOption

    /**
     * 最顶部的 scope 对象
     */
    topScope

    _addWatch(tplExpress, fn) {
        if (!this._watchList) {
            this._watchList = []
        }
        this._watchList.push({watch: tplExpress, fn})
    }

    _applyWatchList() {
        _.forEach(this._watchList, item => {
            this.viewModel.bind(item.watch, item.fn.bind(this))
        })
    }

    get isScope() {
        return true;
    }

    /**
     * 产生一个当前模块有效的唯一id
     * @param key 唯一编号
     */
    uid(key) {
        return this.id + key
    }

    /**
     * 对话框"保存"成功.
     * 关闭对话框，并响应 success 方法
     * @param data 要傳回的數據（可以為空）
     */
    dialogSuccess(data?) {
        this._handle.fireEvent('success', this, data)
        const sender = this._handle.config.animateTarget
        const scope = lookupScope(sender)
        if (typeof this['success'] === 'function') {
            this['success'].call(scope, sender, data)
        }
        this.close()
    }

    /**
     * 设置等待状态
     * @param value
     * @param msg
     */
    setLoading(value: boolean) {
        const scope = this
        scope._handle?.setLoading(value)
    }

    /**
     * 以对话框模式打开当前模块
     * @param sender 发送者(按钮或Scope对象)
     * @param vjsonOption 界面覆盖选项（可以为空）
     * @param dataOption 数据覆盖选项（可以为空）
     */
    showDialog(sender, vjsonOption, dataOption) {
        const that = this

        const vmodel = _.defaultsDeep({
            //

        }, dataOption, that.model)

        this.viewModel = new Ext.app.ViewModel(vmodel);
        this.viewModel.yvanScope = this
        this._applyWatchList()
        this["scopeKey"] = "dialog-" + getVjsonHash(JSON.stringify(this.vjson) + JSON.stringify(vjsonOption))
        const config = _.defaultsDeep({
            animateTarget: sender,
            viewModel: this.viewModel,
            yvanScope: this,
            referenceHolder: true,

        }, vjsonOption, that.vjson, windows)

        if (config.height === 'unset') {
            delete config.height
        }
        if (config.width === 'unset') {
            delete config.width
        }
        // const holder = sender?.lookupReferenceHolder()
        // delete config.constrain
        const topScope = lookupScope(sender)?.topScope
        if (topScope) {
            config.constrain = true
            this.topScope = topScope
        }
        const win = new Ext.Window(config);
        // if (holder) {
        //     holder.add(win)
        // }
        if (topScope) {
            topScope._handle.add(win)
        }

        win.addListener('beforerender', function (sender) {
            // 记录句柄
            if (sender && !that._handle) {
                that._handle = sender
            }
        })
        win.addListener('afterrender', function (sender) {
            // 调用onLoad回调
            try {
                that.onLoad()
            } catch (e) {
                console.error('errorAt onLoad', e)
            }
        })
        win.addListener('destroy', this._destroy.bind(this))

        win.show();
    }

    /**
     * 以标签模式打开当前模块
     * @param vjsonOption 界面覆盖选项（可以为空）
     * @param dataOption 数据覆盖选项（可以为空）
     */
    showPage(vjsonOption, dataOption) {
        const that = this
        this._vjsonOption = vjsonOption;
        this._dataOption = dataOption;
        const vmodel = _.defaultsDeep({
            data: {}
        }, that.model, dataOption)

        this.viewModel = new Ext.app.ViewModel(vmodel);
        this.viewModel.yvanScope = this
        this._applyWatchList()

        this["scopeKey"] = "page-" + getVjsonHash(JSON.stringify(this.vjson) + JSON.stringify(vjsonOption))
        // 根级不能设置id
        delete that.vjson.id

        const config = _.defaultsDeep({
            viewModel: this.viewModel,
            yvanScope: this,
            referenceHolder: true,

        }, vjsonOption, that.vjson)

        const tt = Ext.getCmp('TT')
        const handle = tt.addScope(this, config, (handle) => {
            handle.addListener('added', function (sender) {
                // 记录句柄
                if (sender && !that._handle) {
                    that._handle = sender
                }
            })
            handle.addListener('afterrender', function (sender) {
                // 调用onLoad回调
                try {
                    that.onLoad()
                } catch (e) {
                    console.error('errorAt onLoad', e)
                }
            })
            handle.addListener('destroy', this._destroy.bind(this))
        })

        return handle
    }

    /**
     * 直接渲染到元素
     * @param element 渲染目标
     * @param vjsonOption 界面覆盖选项（可以为空）
     * @param dataOption 数据覆盖选项（可以为空）
     */
    renderTo(element, vjsonOption, dataOption) {
        const that = this
        this._vjsonOption = vjsonOption;
        this._dataOption = dataOption;
        const vmodel = _.defaultsDeep({
            data: {}
        }, that.model, dataOption)
        this["scopeKey"] = "render-" + getVjsonHash(JSON.stringify(this.vjson) + JSON.stringify(vjsonOption))
        this.viewModel = new Ext.app.ViewModel(vmodel);
        this.viewModel.yvanScope = this
        this._applyWatchList()

        const config = _.defaultsDeep({
            viewModel: this.viewModel,
            yvanScope: this,
            referenceHolder: true,
            renderTo: element,

            listeners: {
                afterrender(sender) {
                    // 记录句柄
                    if (sender && !that._handle) {
                        that._handle = sender
                    }

                    // 调用onLoad回调
                    try {
                        that.onLoad()
                    } catch (e) {
                        console.error('errorAt onLoad', e)
                    }

                    // 如果vjson中配置了 afterrender ,需要恢复状态
                    invokeMethod(that.vjson.listeners?.afterrender, that, arguments)
                },

            },

        }, vjsonOption, that.vjson)

        new Ext.container.Viewport(config);
    }

    /**
     * 关闭对话框（或标签页）
     */
    close() {
        this._handle.close()
    }

    /**
     * 获取 viewModel 里包含的数据(只读)
     */
    get data() {
        return this.viewModel.getData()
    }

    /**
     * 设置 viewModel 中的数据
     * 可以是 key, value 模式
     * 也可以是 {key:value} 模式
     */
    set(path, value) {
        return this.viewModel.set(path, value)
    }

    /**
     * 寻找模块内所有的 xtype 对应的对象
     * @param xtypeKey
     */
    down(xtypeKey) {
        return this._handle.down(xtypeKey)
    }

    /**
     * 获取所有设置过 Reference 名称的组件
     */
    get refs() {
        return this._handle.getReferences()
    }

    _destroy() {
        const that = this

        that.onDestroy()
        delete that._watchList
        delete that._handle
    }

    constructor({model, vjson}) {
        const that = this
        this.model = model
        this.originalVjson = _.cloneDeep(vjson)
        this.vjson = this.originalVjson // this.buildVjson()
    }

    /**
     * 模块载入完成之后的回调
     */
    onLoad() {
        if (scopeOnLoad && typeof scopeOnLoad === 'function') {
            scopeOnLoad(this)
        }
    }

    /**
     * 组件卸载之后的回调
     */
    onDestroy() {
    }

}

/**
 * 观察装饰器，viewModel 属性更改时触发成员方法
 * @param tplExpress tpl表达式，例如 "{form.f1}"
 */
export function watch(tplExpress, deep = false) {
    return function (target, propertyKey, pd) {
        target._addWatch({bindTo: tplExpress, deep}, target[propertyKey])
        return target[propertyKey]
    }
}

// 获取vjson的hash值
function getVjsonHash(str: string): string {
    let hash =   3465217896,i,ch;
    for (i = str.length - 1; i >= 0; i--) {
        ch = str.charCodeAt(i);
        hash ^= ((hash << 5) + ch + (hash >> 2));
    }
    return  (hash & 0x7FFFFFFF) + "";
}