import { _decorator, assert, Asset, AssetManager, assetManager, Component, JsonAsset, Material, Node, Sprite, SpriteFrame } from 'cc';
import { ModuleDef } from '../../scripts/ModuleDef';
const { ccclass, property } = _decorator;


export class ResUtil {
    private static resMap = new Map<string | number, any>
    static loadDir(assType: AssetType, cb, util_cb?) {
        let boude = assetManager.getBundle(assType.boundName)
        let res = (bundle: AssetManager.Bundle) => {
            bundle.loadDir(assType.path, assType.type, function (err, assets: any[]) {
                if (err) {
                    console.log(err);
                    return;
                }
                for (let i = 0; i < assets.length; i++) {
                    util_cb && util_cb(assets[i], i)
                }
                cb(assets);
            });
        }
        if (!boude) {
            assetManager.loadBundle(assType.boundName, assType.type, (err, bundle: AssetManager.Bundle) => {
                if (err) {
                    console.log(err);
                    return;
                }
                res(bundle)
            })
        } else {
            res(boude)
        }

    }

    static loadResToMap(assType: AssetType, toMap: (res) => any, cb?) {

        if (ResUtil.resMap.has(assType.id)) {
            cb?.()
            return
        }
        this.loadDir(assType, (res) => {
            ResUtil.resMap.set(assType.id, toMap(res))
            cb?.()
        })

    }

    static getAsset(assetType: AssetType) {
        return ResUtil.resMap.get(assetType.id)
    }
    static loadAsset<T extends Asset>(bundleName: string, url: string): Promise<T> {
        return new Promise<T>((resolve) => {
            let bundle = assetManager.getBundle(bundleName)
            if (bundle) {
                bundle.load(url, (err, data: T) => {
                    if (err) {
                        console.error(err)
                        resolve(null)
                        return
                    }
                    resolve(data)
                    return
                })
            } else {
                assetManager.loadBundle(bundleName, (err, bundle: AssetManager.Bundle) => {
                    if (err) {
                        console.error(err)
                        resolve(null)
                        return
                    }
                    bundle.load(url, (err, data: T) => {
                        if (err) {
                            console.error(err)
                            resolve(null)
                            return
                        }
                        resolve(data)
                        return
                    })

                })
            }
        })
     
    }

}

export const AssetType = ({

    // card_sprite: { id:0,type: SpriteFrame, path: "image/card",boundName:ModuleDef.EXTRA} as AssetType,
    Json: { id: 1, type: JsonAsset, path: "json", boundName: ModuleDef.EXTRA } as AssetType,

})
export type AssetType = {
    type: any,
    path: string
    boundName: string
    id: string | number
}