using Data.SeaHavenIndustries.Enums;

namespace SeaHaven.Services.Helpers
{
    public static class WorkOrderDerivedFields
    {
        private static readonly HashSet<LifecycleStatus?> TerminalStatuses = new()
        {
            LifecycleStatus.Complete,
            LifecycleStatus.Canceled,
            LifecycleStatus.Closed
        };

        public static bool IsPastDue(
            DateTime? scheduledDate,
            LifecycleStatus? lifecycleStatus,
            DateTime? utcNow = null)
        {
            if (!scheduledDate.HasValue)
                return false;

            if (TerminalStatuses.Contains(lifecycleStatus))
                return false;

            var today = (utcNow ?? DateTime.UtcNow).Date;
            return scheduledDate.Value.Date < today;
        }

        public static bool IsTerminal(LifecycleStatus? lifecycleStatus)
            => TerminalStatuses.Contains(lifecycleStatus);

        public static string? GetDayGroup(DateTime? scheduledDate)
        {
            if (!scheduledDate.HasValue)
                return null;

            return scheduledDate.Value.DayOfWeek switch
            {
                DayOfWeek.Monday => "monday",
                DayOfWeek.Tuesday => "tuesday",
                DayOfWeek.Wednesday => "wednesday",
                DayOfWeek.Thursday => "thursday",
                DayOfWeek.Friday => "friday",
                _ => null
            };
        }

        public static string? FormatApptTime(DateTime? start, DateTime? end)
        {
            if (!start.HasValue)
                return null;

            if (end.HasValue)
                return $"{start.Value:HH:mm} – {end.Value:HH:mm}";

            return start.Value.ToString("HH:mm");
        }

        public static string GetLifecycleStatusLabel(LifecycleStatus? status)
        {
            if (!status.HasValue)
                return "";

            return status.Value switch
            {
                LifecycleStatus.Incomplete => "Incomplete",
                LifecycleStatus.Scheduled => "Scheduled",
                LifecycleStatus.InProgress => "In Progress",
                LifecycleStatus.Complete => "Complete",
                LifecycleStatus.Canceled => "Canceled",
                LifecycleStatus.OnHold => "On Hold",
                LifecycleStatus.PendingVendor => "Pending Vendor",
                LifecycleStatus.PendingApproval => "Pending Approval",
                LifecycleStatus.NeedsReview => "Needs Review",
                LifecycleStatus.Closed => "Closed",
                _ => status.Value.ToString()
            };
        }
    }
}