using System;
using System.Collections.Generic;

namespace ProjectEntryLaborAdjust
{
    public abstract class LaborRuleBase
    {
        public string InventoryCD { get; }
        public string Description { get; protected set; }

        public HashSet<string> ExcludedBranchCDs { get; }
        public HashSet<string> ExcludedTemplateCDs { get; }
        public HashSet<string> ExcludedBillRules { get; }

        /// <summary>
        /// Optional project creation cutoff date. If set, any project whose CreatedDateTime
        /// is strictly before this date will be excluded (rule will be skipped).
        /// Date part is compared (time-of-day ignored).
        /// </summary>
        public DateTime? ProjectDate { get; set; }


        /// <summary>
        /// Optional fixed unit rate. If null, the AR pricing engine (defaults) should apply.
        /// </summary>
        public virtual decimal? FixedUnitRate
        {
            get { return null; }
        }

        protected LaborRuleBase(string inventoryCD, string description = null)
        {
            if (string.IsNullOrWhiteSpace(inventoryCD))
                throw new ArgumentException("inventoryCD");

            InventoryCD = inventoryCD.Trim();
            Description = string.IsNullOrWhiteSpace(description)
                ? "Auto-added Labor (" + InventoryCD + ")"
                : description.Trim();

            ExcludedBranchCDs = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
            ExcludedTemplateCDs = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
            ExcludedBillRules = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
        }

        /// <summary>Compute the quantity (hours) for this labor item from the job size.</summary>
        public abstract decimal GetHours(decimal jobSize, DateTime? projectCreatedDate);

        /// <summary>Check if this rule should be skipped under the provided context.</summary>
        public virtual bool IsExcludedFor(string branchCD, string templateCD, string billRule, DateTime? projectCreatedDate)
        {
            if (!string.IsNullOrWhiteSpace(branchCD) && ExcludedBranchCDs.Contains(branchCD.Trim())) return true;
            if (!string.IsNullOrWhiteSpace(templateCD) && ExcludedTemplateCDs.Contains(templateCD.Trim())) return true;
            if (!string.IsNullOrWhiteSpace(billRule) && ExcludedBillRules.Contains(billRule.Trim())) return true;

            return false;
        }
    }



}