import { isArray, isString, isNumber, isBoolean } from "lodash";

export function convertFormData(values: Record<string, null|number[]|string[]|boolean[]|number|string|boolean>): FormData{
    const formData = new FormData();

    const simpleConv = (v: unknown, key: string):string=>{
        if(isString(v)){
            return v;
        }
        if(isNumber(v)){
            return v.toString();
        }
        if(isBoolean(v)){
            return v?'true':'false';
        }
        if(v===null){
            return '';
        }
        throw new TypeError(`지원하지 않는 formData Type: ${key}`);
    }

    for(const [key, value] of Object.entries(values)){
        if(isArray(value)){
            const arrKey = `${key}[]`;
            for(const subValue of value){
                formData.append(arrKey, simpleConv(subValue, key));
            }
            continue;
        }

        formData.append(key, simpleConv(value, key));
    }

    return formData;
}