using HospitalContracts.BindingModels;
using HospitalContracts.BusinessLogicsContracts;
using HospitalContracts.SearchModels;
using HospitalContracts.ViewModels;
using HospitalDataModels.Models;
using Microsoft.AspNetCore.Mvc;
using System.Numerics;

namespace HospitalWebApp.Controllers
{
	/// <summary>
	/// Контроллер для сущности "Рецепт"
	/// </summary>
	public class RecipeController : Controller
	{
		/// <summary>
		/// Логгер
		/// </summary>
		private readonly ILogger<RecipeController> _logger;


		/// <summary>
		/// Бизнес-логика для сущности "Рецепт"
		/// </summary>
		private readonly IRecipeLogic _recipeLogic;

		/// <summary>
		/// Бизнес-логика для сущности "Лекарство"
		/// </summary>
		private readonly IMedicineLogic _medicineLogic;

		/// <summary>
		/// Конструктор
		/// </summary>
		/// <param name="logger"></param>
		/// <param name="recipeLogic"></param>
		/// <param name="medicineLogic"></param>
		public RecipeController(ILogger<RecipeController> logger, IRecipeLogic recipeLogic, IMedicineLogic medicineLogic)
		{
			_logger = logger;
			_recipeLogic = recipeLogic;
			_medicineLogic = medicineLogic;
		}

		/// <summary>
		/// Вывести список рецептов
		/// </summary>
		/// <returns></returns>
		[HttpGet]
		public IActionResult Recipes()
		{
			if (APIClient.Doctor == null)
			{
				return Redirect("~/Home/Enter");
			}

			return View(_recipeLogic.ReadList(new RecipeSearchModel
			{
				DoctorId = APIClient.Doctor.Id,
			}));
		}

		/// <summary>
		/// Создать рецепт
		/// </summary>
		/// <returns></returns>
		[HttpGet]
		public IActionResult CreateRecipe()
		{
			if (APIClient.Doctor == null)
			{
				return Redirect("~/Home/Enter");
			}

			ViewBag.Medicines = _medicineLogic.ReadList(null); 
			return View();
		}

		/// <summary>
		/// Создать рецепт
		/// </summary>
		/// <param name="issuedate"></param>
		/// <param name="medicines"></param>
		/// <exception cref="Exception"></exception>
		[HttpPost]
		public void CreateRecipe(DateTime issuedate, List<int> medicines)
		{
			if (APIClient.Doctor == null)
			{
				throw new Exception("Необходимо авторизоваться!");
			}

			if (issuedate == DateTime.MinValue || medicines == null)
			{
				throw new Exception("Введены не все данные!");
			}

			Dictionary<int, IMedicineModel> recipeMedicines = new Dictionary<int, IMedicineModel>();
			foreach (var medicineId in medicines)
			{
				recipeMedicines.Add(medicineId, _medicineLogic.ReadElement(new MedicineSearchModel { Id = medicineId })!);
			}

			_recipeLogic.Create(new RecipeBindingModel
			{
				IssueDate = issuedate,
				DoctorId = APIClient.Doctor.Id,
				RecipeMedicines = recipeMedicines
			});

			Response.Redirect("/Recipe/Recipes");
		}

		/// <summary>
		/// Редактировать рецепт
		/// </summary>
		/// <returns></returns>
		[HttpGet]
		public IActionResult UpdateRecipe(int id)
		{
			if (APIClient.Doctor == null)
			{
				return Redirect("~/Home/Enter");
			}

			ViewBag.Medicines = _medicineLogic.ReadList(null);

			return View(_recipeLogic.ReadElement(new RecipeSearchModel 
			{ 
				Id = id 
			}));
		}

		/// <summary>
		/// Редактировать рецепт
		/// </summary>
		/// <param name="id"></param>
		/// <param name="issuedate"></param>
		/// <param name="medicines"></param>
		/// <exception cref="Exception"></exception>
		[HttpPost]
		public void UpdateRecipe(int id, DateTime issuedate, List<int> medicines)
		{
			if (APIClient.Doctor == null)
			{
				throw new Exception("Необходимо авторизоваться!");
			}

			if (issuedate == DateTime.MinValue || medicines == null)
			{
				throw new Exception("Введены не все данные!");
			}

			Dictionary<int, IMedicineModel> recipeMedicines = new Dictionary<int, IMedicineModel>();
			foreach (var medicineId in medicines)
			{
				recipeMedicines.Add(medicineId, _medicineLogic.ReadElement(new MedicineSearchModel { Id = medicineId })!);
			}

			_recipeLogic.Update(new RecipeBindingModel
			{
				Id = id,
				IssueDate = issuedate,
				DoctorId = APIClient.Doctor.Id,
				RecipeMedicines = recipeMedicines
			});

			Response.Redirect("/Recipe/Recipes");
		}

		/// <summary>
		/// Удалить рецепт
		/// </summary>
		/// <returns></returns>
		[HttpPost]
		public void DeleteRecipe(int id)
		{
			if (APIClient.Doctor == null)
			{
				throw new Exception("Необходимо авторизоваться!");
			}

			_recipeLogic.Delete(new RecipeBindingModel
			{
				Id = id
			});

			Response.Redirect("/Recipe/Recipes");
		}
	}
}