import { ActivationContext } from "./ActivationContext";

export class ContextResolver<S extends object> {
    private readonly _context: ActivationContext<S>;

    constructor(context: ActivationContext<S>) {
        this._context = context;
    }

    resolve<K extends keyof S, O extends { lazy: true}>(name: K, opts?: O): () => (O extends { default: infer T } ? T : never) | NonNullable<S[K]>;
    resolve<K extends keyof S, O extends { lazy?: false}>(name: K, opts?: O): (O extends { default: infer T } ? T : never) | NonNullable<S[K]>;
    resolve(name: keyof S, opts?: {lazy?: boolean, default?: unknown}) {
        if (opts && opts.lazy) {
            return () => "default" in opts ? this._context.resolve(name, opts.default) : this._context.resolve(name);
        } else {
            return opts && "default" in opts ? this._context.resolve(name, opts.default) : this._context.resolve(name);
        }
    }
}