import { $NAME, MetaContext, MetaObject } from '../../MetaContext';

export const $STRINGIFY = '$stringify';

export type Stringify<T> = (obj: T) => string;

export type $Stringify<T> = { [$STRINGIFY]: Stringify<T> };

export const withStringify = <TMetaContextBase extends new (...args: any[]) => MetaContext>(MetaContextBase: TMetaContextBase) => class extends MetaContextBase {
    [$STRINGIFY]<T>(value: T) {
        return this.resolveValue(value)[$STRINGIFY](value, this) as string;
    }
};

export type GenericStringify<T, U> = (obj: T, stringifyfn: Stringify<U>, context: any) => string;

export type StringifyWrapper = (metaObject: MetaObject, contents: string) => string;

export function deepStringify<T, U = T>(genericStringify: GenericStringify<T, U>, stringifyWrapper: StringifyWrapper) {
    return function $stringify(this: MetaObject, obj: T, context: MetaContext & $Stringify<U>) {
        const stringifyfn = context[$STRINGIFY];
        return (this[$STRINGIFY] = function $stringify(this: MetaObject, obj: T, context: any) {
            return stringifyWrapper(this, genericStringify(obj, stringifyfn, context));
        }).call(this, obj, context) as string;
    };
}

export function memberToString<T>(obj: T) {
    return obj.toString();
}

export function castString<T>(obj: T) {
    return String(obj);
}

export function quoteString(str: string) {
    return `'${str.replace(/'/g, "\\'")}'`;
}

export function quoteKey(key: string) {
    return /^[a-zA-Z_$][0-9a-zA-Z_$]*$/.test(key) ? key : quoteString(key);
}

export function stringifyArrayWrapper(_: MetaObject, contents: string) {
    return contents ? `[ ${contents} ]` : '[]';
}

export function stringifyArrayLikeWrapper(metaObject: MetaObject, contents: string) {
    return contents ? `${metaObject[$NAME]} [ ${contents} ]` : `${metaObject[$NAME]} []`;
}

export function stringifyObjectWrapper(_: MetaObject, contents: string) {
    return contents ? `{ ${contents} }` : '{}';
}

export function stringifyObjectLikeWrapper(metaObject: MetaObject, contents: string) {
    return contents ? `${metaObject[$NAME]} { ${contents} }` : `${metaObject[$NAME]} {}`;
}

export function stringifyFunctionWrapper(metaObject: MetaObject, _: string) {
    return `${metaObject[$NAME]}() {}`;
}