namespace QMSDAL.DTO
{
    // ── Result returned by MatrixBLL.ValidateIssue ────────────────────────────
    public class ValidateIssueResultDTO
    {
        // ─────────────────────────────────────────────
        // CORE STATUS
        // ─────────────────────────────────────────────
        public bool IsAllowed { get; set; }

        public string Status =>
            IsAllowed ? "SUCCESS" : "ERROR";

        public string Title =>
            IsAllowed ? "Issue Allowed" : "Issue Blocked";

        public string? Message { get; set; }

        // ─────────────────────────────────────────────
        // QUANTITY BREAKDOWN (VERY IMPORTANT FOR USERS)
        // ─────────────────────────────────────────────
        public decimal AllocatedQty { get; set; }
        public decimal ConsumedQty { get; set; }
        public decimal AvailableQty { get; set; }
        public decimal RequestedQty { get; set; }

        // ─────────────────────────────────────────────
        // HUMAN READABLE SUMMARY
        // ─────────────────────────────────────────────
        public string? Summary { get; set; }

        // ─────────────────────────────────────────────
        // FACTORY METHODS
        // ─────────────────────────────────────────────
        public static ValidateIssueResultDTO Allow(
            string message = "Issue is allowed.",
            decimal allocated = 0,
            decimal consumed = 0,
            decimal available = 0,
            decimal requested = 0)
            => new()
            {
                IsAllowed = true,
                Message = message,
                AllocatedQty = allocated,
                ConsumedQty = consumed,
                AvailableQty = available,
                RequestedQty = requested,
                Summary = requested > 0
                    ? $"You are issuing {requested} units."
                    : "Issue is allowed."
            };

        public static ValidateIssueResultDTO Block(
            string reason,
            decimal allocated = 0,
            decimal consumed = 0,
            decimal available = 0,
            decimal requested = 0)
            => new()
            {
                IsAllowed = false,
                Message = reason,
                AllocatedQty = allocated,
                ConsumedQty = consumed,
                AvailableQty = available,
                RequestedQty = requested,
                Summary = $"Cannot proceed: {reason}"
            };
    }
}