using LCU.Library.Internal.IncentiveApiModels.Entities;
using LCU.Library.Internal.IncentiveApiModels.Enums;

namespace LCU.API.Internal.Operations.IncentiveApiLib.Extensions;

public static class ActivityExtensions
{
    public static StateChangeRequirement RequiredToChangeState(this Activity activity, ActivityState targetState)
    {
        return activity.State switch
        {
            ActivityState.Accepted => targetState switch
            {
                ActivityState.Accepted => StateChangeRequirement.AdminOrPermission,
                ActivityState.ManualReview => StateChangeRequirement.AdminOrPermission,
                ActivityState.PendingReferral when activity.Type == ActivityType.Referral => StateChangeRequirement.AdminOrPermission,
                ActivityState.PendingTransfer => StateChangeRequirement.AdminOrPermission,
                ActivityState.Rejected => StateChangeRequirement.AdminOrPermission,
                _ => StateChangeRequirement.NotAllowed
            },
            ActivityState.Created => targetState switch
            {
                ActivityState.Accepted => StateChangeRequirement.SystemOnly,
                ActivityState.ManualReview => StateChangeRequirement.SystemOnly,
                ActivityState.PendingReferral => StateChangeRequirement.SystemOnly,
                ActivityState.Rejected => StateChangeRequirement.SystemOnly,
                _ => StateChangeRequirement.NotAllowed
            },
            ActivityState.ManualReview => targetState switch
            {
                ActivityState.Accepted => StateChangeRequirement.AdminOrPermission,
                ActivityState.Rejected => StateChangeRequirement.Hierarchical,
                _ => StateChangeRequirement.SystemOnly
            },
            ActivityState.PendingReferral => targetState switch
            {
                ActivityState.Accepted => StateChangeRequirement.AdminOrPermission,
                ActivityState.Transferred => StateChangeRequirement.Hierarchical,
                _ => StateChangeRequirement.NotAllowed
            },
            ActivityState.PendingTransfer => targetState switch
            {
                ActivityState.Accepted => StateChangeRequirement.AdminOrPermission,
                ActivityState.Transferred => StateChangeRequirement.Hierarchical,
                _ => StateChangeRequirement.NotAllowed
            },
            ActivityState.Rejected => targetState switch
            {
                ActivityState.Accepted => StateChangeRequirement.AdminOrPermission,
                ActivityState.ManualReview => StateChangeRequirement.AdminOrPermission,
                ActivityState.PendingReferral when activity.Type == ActivityType.Referral => StateChangeRequirement.AdminOrPermission,
                _ => StateChangeRequirement.NotAllowed
            },
            ActivityState.Transferred => StateChangeRequirement.NotAllowed,
            _ => StateChangeRequirement.NotAllowed
        };
    }
}