//
//  ActionSetupBiometricsHandler.swift
//  MobileFirstFramework
//
//  Created by Scott Pfeil on 4/5/23.
//  Copyright © 2023 Verizon Wireless. All rights reserved.
//

import MVMCore
import LocalAuthentication

open class ActionBiometricStateHandler: MVMCoreActionHandlerProtocol {
    
    enum Error: MVMError, CustomStringConvertible {
        case unknown
        
        public var description: String {
            switch self {
            case .unknown:
                return "Cannot evaluate biometric policy for an unknown reason."
            }
        }
    }
    
    required public init() {}
    
    public func execute(with model: MVMCore.ActionModelProtocol, delegateObject: MVMCore.DelegateObject?, additionalData: [AnyHashable : Any]?) async throws {
        guard let model = model as? ActionBiometricStateModel else { return }
        
        var error: NSError?
        let context = LAContext()
        guard context.canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, error: &error) else {
            guard let error = error else {
                throw Self.Error.unknown
            }
            if error.code == LAError.biometryNotEnrolled.rawValue,
               let action = model.biometricsDisabledAction {
                try await delegateObject?.actionDelegate?.action(with: action, additionalData: additionalData, delegateObject: delegateObject)
            } else if error.code == LAError.biometryNotAvailable.rawValue,
                let action = model.biometricsDeniedAction {
                try await delegateObject?.actionDelegate?.action(with: action, additionalData: additionalData, delegateObject: delegateObject)
            } else {
                throw error
            }
            return
        }
        try await delegateObject?.actionDelegate?.action(with: model.biometricsEnabledAction, additionalData: additionalData, delegateObject: delegateObject)
    }
}