using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Net.Http;
using System.Threading.Tasks;
using LCU.API.Collections.RepoApi.Configuration;
using LCU.Shared.Collections.RepoApiLib.Models.Consumer;

namespace LCU.API.Collections.RepoApi.DataAccess
{
    [ExcludeFromCodeCoverage]
    public class CoreDao : DaoClient, ICoreDao
    {
        private readonly RepoApiConfiguration _configuration;

        public CoreDao(RepoApiConfiguration configuration,
            IHttpClientFactory clientFactory) : base(clientFactory)
        {
            _configuration = configuration;
        }

        public async Task<MemberDetail> RetrieveMemberAsync(string accountNo)
        {
            var url = CreateUrlFromAccountNo(_configuration.CoreMemberUrl, accountNo);
            return await RetrieveByIdentifierAsync<MemberDetail>(url, accountNo);
        }

        public async Task<LoanDetail> RetrieveLoanAsync(string accountNo)
        {
            var url = CreateUrlFromAccountNo(_configuration.CoreLoanUrl, accountNo);
            return await RetrieveByIdentifierAsync<LoanDetail>(url, accountNo);
        }

        public async Task<IReadOnlyCollection<CollateralDetail>> RetrieveCollateralAsync(string accountNo)
        {
            var url = CreateUrlFromAccountNo(_configuration.CoreCollateralUrl, accountNo);
            return await RetrieveByIdentifierAsync<IReadOnlyCollection<CollateralDetail>>(url, accountNo);
        }

        public async Task<IReadOnlyCollection<CoreTransaction>> RetrieveTransactionsAsync(string accountNo)
        {
            var url = CreateUrlFromAccountNoAndDateRange(_configuration.CoreLoanTransactions, accountNo);
            return await RetrieveByIdentifierAsync<IReadOnlyCollection<CoreTransaction>>(url, accountNo);
        }

        private string CreateUrlFromAccountNo(string inputUrl, string accountNo)
        {
            var url = inputUrl.Replace(":loanId", accountNo);
            return url;
        }

        private string CreateUrlFromAccountNoAndDateRange(string inputUrl, string accountNo)
        {
            var url = inputUrl.Replace(":accountNo", accountNo);
            url = url.Replace(":startDate", DateTimeForUri(DateTime.Now.AddDays(_configuration.TransactionHistoryStartDateOffset)));
            url = url.Replace(":endDate", DateTimeForUri(DateTime.Now));
            url += FormatArrayValuesIntoQuery(_configuration.TransactionTypeCodes, _configuration.TransactionTypeCodeQueryPrefix);
            return url;
        }

        private string DateTimeForUri(DateTime dateTime)
        {
            return dateTime.ToString(_configuration.TransactionHistoryParameterDateFormat);
        }
        
        private string FormatArrayValuesIntoQuery(List<string> arrayValues, string queryPrefix)
        {
            var returnString = "";
            foreach (var arrayValue in arrayValues) {
                returnString += (queryPrefix + arrayValue);
            }
            
            return returnString;
        }
    }
}