LONDON-IOS/Pods/SwinjectAutoregistration/Sources/ResolutionError.swift

//
//  Warnings.swift
//  SwinjectAutoregistration
//
//  Created by Tomas Kohout on 18/01/2017.
//  Copyright © 2017 Swinject Contributors. All rights reserved.
//

import Foundation

enum ResolutionError {
    case tooManyDependencies(Int)
    var message: String {
        switch self {
        case .tooManyDependencies(let dependencyCount):
            return "⚠ Autoregistration is limited to maximum of \(maxDependencies) dependencies, tried to resolve \(dependencyCount). Use regular `register` method instead. "
        }
    }
}

/// Shows warnings based on information parsed from initializers description

func resolutionErrors<Service, Parameters>(forInitializer initializer: (Parameters) -> Service) -> [ResolutionError] {
    #if os(Linux) || os(Android)
        //Warnings are not supported on Linux
        return []
    #else
    let parser = TypeParser(string: String(describing: Parameters.self))
    guard let type = parser.parseType() else { return [] }
    
    let dependencies: [Type]
    
    //Multiple arguments
    if case .tuple(let types) = type {
        dependencies = types
    //Single argument
    } else if case .identifier(_) = type {
        dependencies = [type]
    } else {
        return []
    }
    
    var warnings: [ResolutionError]  = []
    
    if dependencies.count > maxDependencies {
        warnings.append(.tooManyDependencies(dependencies.count))
    }
    
    return warnings
    #endif
}

func hasUnique(arguments: [Any.Type]) -> Bool {
    for (index, arg) in arguments.enumerated() {
        if (arguments.enumerated().filter { index != $0 && arg == $1 }).count > 0 {
            return false
        }
    }
    return true
}