//
//  DependencyContainer.swift
//  Vitaway
//
//  Created by Artur Gurgul on 20/06/2025.
//

final class DependencyContainer: Resolver {
    private var factories: [String: (Resolver) -> Any] = [:]
    private var instances: [String: Any] = [:]
    
    func register<T>(_ type: T.Type, cache: Bool = true, factory: @escaping (Resolver) -> T) {
        let key = String(describing: type)
        factories[key] = factory
        
        if cache {
            instances[key] = factory(self)
        }
    }

    func registerSingleton<T>(_ type: T.Type, factory: @escaping (Resolver) -> T) {
        let key = String(describing: type)
        factories[key] = factory
    }
    
    func resolve<T>() -> T {
        resolve(type: T.self)
    }
    
    func resolve<T>(type: T.Type) -> T {
        let key = String(describing: T.self)
        
        if let instance = instances[key] as? T {
            return instance
        }
        
        guard let factory = factories[key], let instance = factory(self) as? T else {
            fatalError("No registered entry for type \(key)")
        }
        return instance
    }
  
  static var shared: DependencyContainer {
    (UIApplication.shared.delegate as! AppDelegate).sharedState.container
  }
}