import { typeCollection } from 'handsome-helpers/dist/utils';

export type SetOptionsFirstArguments = (config: any, echarts: any) => any;

/**
 * @class EchartsChain
 * @example: 
 * const echartsChain = new EchartsChain()
 * echartsChain
 *  .property('title')
 *      .setOptions((config, echarts) => {
 *          return {
 *              ...config,
 *              title: 'hello'
 *          };
 *      })
 */
export default class EchartsChain {
    public CONFIG: any;
    public echartsGlobal: any = null;
    private optionsName: string = '';

    constructor(defaultOptions: any, echarts: any) {
        this.echartsGlobal = echarts;
        // 设置echarts配置的默认配置
        this.CONFIG = typeCollection.isObject(defaultOptions) ? defaultOptions : {};
    }

    /**
     * 设置echarts属性的单个属性
     * @param name 
     */
    public property(name: string) {
        this.optionsName = name;
        this.CONFIG[name] = this.CONFIG[name] || {};
        return this;
    }

    public setOptions(configFn: SetOptionsFirstArguments) { 
        const newConfig = this.copyConfig(this.CONFIG[this.optionsName]);
        this.CONFIG[this.optionsName] = configFn
            ? configFn.call( null, newConfig, this.echartsGlobal)
            : newConfig;
        return this;
    }

    public copyConfig(config: any) {
        if(typeCollection.isObject(config)) {
            return Object.assign({}, config);
        }else if(typeCollection.isArray(config)) {
            return config.concat([]);
        }
    }

    public toConfig() {
        return this.CONFIG;
    }
}