import { globalState } from '../../app/global-state';

export class MemoryCacheConfig {
	static windowRootName: string = 'powerduck';
	static cacheObjectKey: string = '_cache';
}

class MemoryCacheImpl {
	private readonly _repository: string;

	constructor(repository: string) {
		this._repository = repository;
	}

	private getCacheRoot(): any {
		const repository = this._repository;
		if (globalState[repository] == null) {
			globalState[repository] = {};
		}

		if (globalState[repository][MemoryCacheConfig.cacheObjectKey] == null) {
			globalState[repository][MemoryCacheConfig.cacheObjectKey] = {};
		}

		return globalState[repository][MemoryCacheConfig.cacheObjectKey];
	}

	getItem<T>(key: string): T {
		return this.getCacheRoot()[key];
	}

	setItem<T>(key: string, value: T): void {
		this.getCacheRoot()[key] = value;
	}
}

export default class MemoryCache {
	static get(repository: string): MemoryCacheImpl {
		return new MemoryCacheImpl(repository);
	}

	static get default() {
		return new MemoryCacheImpl(MemoryCacheConfig.windowRootName);
	}
}