using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SafeBagDE70.StateMachine
{
    public class ProcessStateMachine    
    {
        private string? _currentState;

        public ProcessStateMachine()
        {
            _currentState = App.StateMachineConfig.States.FirstOrDefault();
        }

        public string CurrentState => _currentState;

        public bool CanTransitionTo(string newState, out Transition transition)
        {
            transition = App.StateMachineConfig.Transitions
                .FirstOrDefault(t => t.From.Contains(_currentState) && t.To.Contains(newState));

            return transition != null;
        }

        public void TransitionToState(string newState)
        {
            if (CanTransitionTo(newState, out Transition transition))
            {
                if (ExecuteActions(transition))
                {
                    // Transition to the new state if the required condition is met
                    _currentState = newState;
                }
                else
                {
                    Console.WriteLine($"Failed to meet action requirements. Staying in {_currentState}.");
                }
            }
            else
            {
                throw new InvalidOperationException($"Cannot transition from {_currentState} to {newState}");
            }
        }

        private bool ExecuteActions(Transition transition)
        {
            bool allRequiredActionsSucceeded = true;
            bool atLeastOneActionSucceeded = false;

            foreach (var action in transition.Actions)
            {
                bool success = ExecuteAction(action.Name);

                if (success)
                {
                    atLeastOneActionSucceeded = true;
                }

                if (action.IsRequired && !success)
                {
                    allRequiredActionsSucceeded = false;
                }
            }

            // Determine if the transition should happen based on the condition
            if (transition.RequireAtLeastOneActionSuccess)
            {
                return atLeastOneActionSucceeded;
            }
            else
            {
                return allRequiredActionsSucceeded;
            }
        }

        private bool ExecuteAction(string actionName)
        {
            // Simulate action execution based on the action name
            //Console.WriteLine($"Executing action: {App.StateMachineConfig.Actions[actionName]}");
            switch(actionName)
            {
                case "DoInit":
                    
                    break;
            }

            // For the sake of this example, all actions succeed
            return true;
        }
    }
}