import { _decorator, Node, Camera, Component, director, game, instantiate, Prefab, RenderTexture, view, resources, macro } from "cc";
import Utils from "../Common/Utils";
import GameRootUI from "../Common/GameRootUI";
import ResManager from "./ResManager";
import { CommonConfig } from "../Config/CommonConfig";

const { ccclass, property } = _decorator;

@ccclass('ViewManager')
export class ViewManager extends Component {
    private static _I: ViewManager = null;
    public static get I(): ViewManager {
        if (!ViewManager._I) {
            ViewManager._I = new ViewManager();
        }
        return ViewManager._I;
    }

    private m_viewList = [];
    private m_viewListData = {};

    start() {

    }

    update(deltaTime: number) {
        
    }


    private openIdx = 0;
    private openViewByPrefab(err, i_prefab: Prefab | Node, i_openInfo, callBack = null, path, type: string = '') {
        if (err) {
            Utils.Log('打开界面时加载资源出错:' + err, path);
            return;
        }
        let t_node:any = instantiate(i_prefab);
        if (!t_node.isValid) return;

        //界面已打开
        for (let i = this.m_viewList.length - 1; i >= 0; i--) {
            let t_view: Node = this.m_viewList[i];
            if (t_view) {
                if (t_view.isValid && t_node.name == t_view.name) {
                    t_node.setSiblingIndex(999)
                    Utils.Log('已经打开的相同的界面：' + t_node.name);
                    return;
                }
            }
        }

        //截屏纹理
        if (i_openInfo && i_openInfo.blueBg===true){
            i_openInfo.screenShotTex = this.getScreenShot()
        }

        let viewSP = t_node.getComponent(t_node.name);
        if (!viewSP) {
            for (let index = 0; index < t_node['_components'].length; index++) {
                const element = t_node['_components'][index];
                if (element.isScriptComponent) {
                    viewSP = element;
                    break;
                }
            }
        }
        
        this.m_viewList.push(t_node);
        this.m_viewListData[t_node.name] = { path: path, data: i_openInfo, sort: this.openIdx++, name: t_node.name, uuid: t_node["_prefab"]['asset']['_uuid'] };
        viewSP && viewSP.openUIData && viewSP.openUIData(i_openInfo);
        callBack && callBack(t_node, i_openInfo);
        if (type == '') {
            GameRootUI.I.AddUIToLayer(t_node, CommonConfig.UILayerGroup.Layer_ui1, this.m_viewList.length)
        } else if (type == 'top') {
            // t_node.sType = "top"
            GameRootUI.I.AddUIToLayer(t_node, CommonConfig.UILayerGroup.Layer_top)
        } else if (type == 'tips') {
            GameRootUI.I.AddUIToLayer(t_node, CommonConfig.UILayerGroup.Layer_tips)
        }

    }

    //检查是否有相同的View
    private checkSameView(i_node: Node, path){
        // let t_com = i_node.getComponent('li_BaseView');
        // if (t_com) {
        //     if (t_com.name == 'li_BaseView') return true;
        //     for (let i = this.m_viewList.length - 1; i >= 0; i--) {
        //         let t_view: Node = this.m_viewList[i];
        //         if (t_view) {
        //             if (t_view.isValid && t_com.node.name == t_view.name) {
        //                 i_node.setSiblingIndex(999)
        //                 return false;
        //             }
        //         }
        //     }
        //     i_node['path'] = path;
        //     this.m_viewList.push(i_node);
        //     return true;
        // }

        return false;
    }

    //获取截屏纹理
    private getScreenShot():RenderTexture {
        // let texture = new RenderTexture();
        // let winSize = view.getViewportRect()
        // let winSize1 = view.getVisibleSize()
        // texture.reset({
        //     width: winSize.width,
        //     height: winSize.height,
        // });
        
        // let camera = director.getScene().getComponentInChildren(Camera);
        // let oldTargetTexture = camera.targetTexture
        // camera.targetTexture = texture;
        // camera.render();
        // camera.targetTexture = oldTargetTexture
        
        // return texture
        return null
    }
    
    private getViewIndex(i_view: Node) {
        for (let i = this.m_viewList.length - 1; i >= 0; i--) {
            let t_view = this.m_viewList[i];
            if (t_view == i_view) {
                return i;
            }
        }

        return -1;
    }


    
    /**打开resources窗体 */
    openMainView(i_prefab: string | Prefab, i_openData?, callBack = null, type: string = '') {
        if (i_prefab instanceof Prefab) {
            this.openViewByPrefab(null, i_prefab, i_openData, callBack, i_prefab, type);
        } else {
            resources.load(i_prefab, (err, $prefab: Prefab) => {
                this.openViewByPrefab(err, $prefab, i_openData, callBack, i_prefab, type);
            });
        }
    }
    /**打开bundle窗体 */
    openBundlesView(i_prefab: string | Prefab, i_openData?, callBack = null, type: string = '') {
        if (i_prefab instanceof Prefab) {
            this.openViewByPrefab(null, i_prefab, i_openData, callBack, i_prefab, type);
        } else {
            console.log("打开界面：", i_prefab);
            ResManager.I.getPrefab(i_prefab, (pb: Node) => {
                this.openViewByPrefab(null, pb, i_openData, callBack, i_prefab, type);
            }, null);
        }
    }


    /**关闭窗体 */
    closeView(i_view: Node) {
        let closeUIName = null
        let t_index = this.getViewIndex(i_view);
        if (t_index > -1) {
            let t_view = this.m_viewList[t_index];
            if (t_view) {
                closeUIName = t_view.name
                delete this.m_viewListData[t_view.name];
                t_view.destroy();
                t_view.removeFromParent();

            }
            this.m_viewList.splice(t_index, 1); //删除列表元素  参数1是指定位置，参数2是删除元素个数
        }
        else {
            if (!this.m_viewList.length) {
                i_view.destroy();
            }
            Utils.Log('试图关闭一个队列中不存在的界面:', i_view.name);
        }
    }
    
    /**关闭所有窗体 */
    closeAllView(isR = false) {
        for (let i = this.m_viewList.length - 1; i >= 0; i--) {
            let t_view = this.m_viewList[i];
            if (t_view) {
                delete this.m_viewListData[t_view.name];
                t_view.destroy();
                t_view.removeFromParent();
            }
        }

        this.m_viewList = [];
        this.m_viewListData = {};
        this.openIdx = 0;
        
    }

    //是否在主界面，没有打开任何其他界面。主界面是在打开场景时直接创建的，不走这里的打开接口
    isNotOpenAnyUI() {
        if (this.m_viewList && this.m_viewList.length > 0) {
            return false
        }
        return true
    }

}