using System;
using System.Threading.Tasks;
using System.Text;
using Compliance.Domain.Models;
using Compliance.DTOs;

namespace Compliance.Services.ValidationRules
{
    public class BasicInformationValidationRule : IValidationRule
    {
        private const string RULE_NAME = "Basic Information Validation";
        public int Priority => 1;  // Should run first

        public async Task<ValidationResult> ValidateAsync(
            BillComplianceRequest request,
            DistributorInformation distributorInfo,
            Client clientInfo)
        {
            var isValid = true;
            var message = new StringBuilder();

            // Validate Consumer SmartCode match
            if (request.SmartCode != clientInfo.SmartCode)
            {
                isValid = false;
                message.AppendLine("SmartCode in bill doesn't match client registration.");
            }

            // Validate Distributor match
            if (request.DistributorName != distributorInfo.Name)
            {
                isValid = false;
                message.AppendLine("Distributor name in bill doesn't match distributor information.");
            }

            // Validate Consumer Classification
            if (!string.IsNullOrEmpty(clientInfo.ConsumerGroup))
            {
                if (clientInfo.ConsumerGroup != request.ConsumerGroup)
                {
                    isValid = false;
                    message.AppendLine("Consumer group in bill doesn't match client registration.");
                }

                if (clientInfo.Subgroup != request.Subgroup)
                {
                    isValid = false;
                    message.AppendLine("Consumer subgroup in bill doesn't match client registration.");
                }
            }

            // Validate Supply Voltage
            if (!string.IsNullOrEmpty(clientInfo.SupplyVoltage) && 
                clientInfo.SupplyVoltage != request.SupplyVoltage)
            {
                isValid = false;
                message.AppendLine("Supply voltage in bill doesn't match client registration.");
            }

            return await Task.FromResult(new ValidationResult
            {
                IsValid = isValid,
                RuleName = RULE_NAME,
                Message = message.ToString().TrimEnd()
            });
        }
    }
}