using BankContracts.BindingModels;
using BankContracts.BusinessLogicsContracts;
using BankContracts.SearchModels;
using BankContracts.StoragesContracts;
using BankContracts.ViewModels;
using Microsoft.Extensions.Logging;

namespace BankBusinessLogic.BusinessLogics
{
    public class TermLogic : ITermLogic
    {
        private readonly ILogger _logger;
        private readonly ITermStorage _termStorage;
        public TermLogic(ILogger<TermLogic> logger,
            ITermStorage termStorage)
        {
            _logger = logger;
            _termStorage = termStorage;
        }
        public bool Create(TermBindingModel model)
        {
            CheckModel(model);
            if (_termStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }
        public bool Update(TermBindingModel model)
        {
            CheckModel(model);
            if (_termStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }
        public bool Delete(TermBindingModel model)
        {
            CheckModel(model, false);
            _logger.LogInformation("Delete. Id: {Id}", model.Id);
            if (_termStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }
            return true;
        }
        public List<TermViewModel>? ReadList(TermSearchModel? model)
        {
            _logger.LogInformation("ReadList. Id: {Id}", model?.Id);
            var list = model == null ? _termStorage.GetFullList() :
                _termStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count: {Count}", list.Count);
            return list;
        }
        public TermViewModel? ReadElement(TermSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. Id: {Id}", model.Id);
            var element = _termStorage.GetElement(model);
            if (element == null)
            {
                _logger.LogWarning("ReadElement element not found");
                return null;
            }
            _logger.LogInformation("ReadElement find. Id: {Id}", element.Id);
            return element;
        }
        private void CheckModel(TermBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (model.ProgramId <= 0)
            {
                throw new ArgumentNullException(
                    "Идентификатор кредитной программы должен быть больше 0",
                    nameof(model.ProgramId));
            }
            if (model.Duration <= 0)
            {
                throw new ArgumentNullException(
                    "Длительность должна быть больше 0",
                    nameof(model.Duration));
            }
            _logger.LogInformation("Term. Id: {Id}. ProgramId: " +
                "{ProgramId}. Duration: {Duration}.", model.Id, 
                model.ProgramId, model.Duration);
        }
    }
}