using ComputerStoreBusinessLogic.BusinessLogic;
using ComputerStoreContracts.BindingModels;
using ComputerStoreContracts.BusinessLogicContracts;
using ComputerStoreContracts.SearchModels;
using ComputerStoreDataModels.Models;
using Microsoft.AspNetCore.Mvc;
using System.Text.RegularExpressions;

namespace ComputerStoreSellerApp.Controllers
{
    public class RequestController : Controller
    {
        private IRequestLogic _requestLogic;
        private IComponentLogic _componentLogic;

        private static List<(int componentId, int count)> selectedComponents = new();

        public RequestController(IRequestLogic requestLogic, IComponentLogic componentLogic)
        {
            _requestLogic = requestLogic;
            _componentLogic = componentLogic;
        }

        [HttpPost("[controller]/[action]")]
        public IActionResult AddComponent(int component, int amount)
        {
            if (!HttpContext.Session.Keys.Contains("login"))
            {
                return RedirectToAction("Login", "Auth");
            }
            if (amount <= 0)
            {
                return RedirectToAction("Create", "Request");
            }

            var tmp = selectedComponents.FirstOrDefault(x => x.componentId == component && x.count > 0);
            if (tmp.componentId != 0)
            {
                selectedComponents.Remove((tmp.componentId, tmp.count));
                selectedComponents.Add((component, tmp.count + amount));
            }
            else
            {
                selectedComponents.Add((component, amount));
            }

            return RedirectToAction("CreatePage", "Request");
        }

        [HttpPost("[controller]/[action]")]
        public IActionResult UpdateComponent(int component, int amount, int id)
        {
            if (!HttpContext.Session.Keys.Contains("login"))
            {
                return RedirectToAction("Login", "Auth");
            }
            if (amount <= 0)
            {
                return RedirectToAction("Create", "Request");
            }

            var tmp = selectedComponents.FirstOrDefault(x => x.componentId == component && x.count > 0);
            if (tmp.componentId != 0)
            {
                selectedComponents.Remove((tmp.componentId, tmp.count));
                selectedComponents.Add((component, tmp.count + amount));
            }
            else
            {
                selectedComponents.Add((component, amount));
            }

            ViewData["currentRequest"] = _requestLogic.ReadElement(new RequestSearchModel() { ID = id });
            ViewData["components"] = _componentLogic.ReadList(null);

            ViewData["selectedComponents"] = selectedComponents;

            return View("Views/Request/Create.cshtml");
        }


        [HttpGet("[controller]/[action]")]
        public IActionResult List()
        {
            if (!HttpContext.Session.Keys.Contains("login"))
            {
                return RedirectToAction("Login", "Auth");
            }
            selectedComponents.Clear();
            ViewData["requests"] = _requestLogic.ReadList(null);

            return View();
        }

        [HttpGet("[controller]/[action]/{id}")]
        public IActionResult View(int id)
        {
            if (!HttpContext.Session.Keys.Contains("login"))
            {
                return RedirectToAction("Login", "Auth");
            }

            var request = _requestLogic.ReadElement(new RequestSearchModel() { ID = id });

            if (request is null)
            {
                TempData.Add("error", "Заявки с таким идентификатором не существует");
                return RedirectToAction("List", "Request", null);
            }
            ViewData["currentRequest"] = request;
            ViewData["components"] = _componentLogic.ReadList(null);

            foreach (var selcomp in request.RequestComponents)
            {
                selectedComponents.Add((selcomp.Item1.ID, selcomp.Item2));
            }


            ViewData["selectedComponents"] = selectedComponents;

            return View("Views/Request/Create.cshtml");
        }

        [HttpGet("[controller]/[action]")]
        public IActionResult CreatePage()
        {
            if (!HttpContext.Session.Keys.Contains("login"))
            {
                return RedirectToAction("Login", "Auth");
            }

            ViewData["selectedComponents"] = selectedComponents;
            ViewData["components"] = _componentLogic.ReadList(null);

            return View("Views/Request/Create.cshtml");
        }

        [HttpPost("[controller]/[action]")]
        public IActionResult Create()
        {
            if (!HttpContext.Session.Keys.Contains("login"))
            {
                return RedirectToAction("Login", "Auth");
            }

            if (selectedComponents.Count == 0)
            {
                TempData.Add("error", "Заявка должна содержать компоненты");
                return RedirectToAction("CreatePage", "Request");
            }

            try
            {
                double tmpPrice = 0;
                foreach (var (componentId, count) in selectedComponents)
                {
                    tmpPrice += _componentLogic.ReadElement(new ComponentSearchModel() { ID = componentId })!.Price * count;
                }

                _requestLogic.Create(new RequestBindingModel()
                {
                    OrderID = null,
                    PCID = null,
                    Price = tmpPrice,
                    RequestComponents = selectedComponents.Select(x => ((IComponentModel)_componentLogic.ReadElement(new ComponentSearchModel() { ID = x.componentId })!, x.count)).ToList()
                });
                selectedComponents.Clear();
                return RedirectToAction("List", "Request", null);
            }
            catch (Exception e)
            {
                TempData.Add("error", Regex.Replace(e.Message, "[a-zA-Z\\(\\)']", ""));
                selectedComponents.Clear();
                return RedirectToAction("List", "Request", null);
            }
        }

        [HttpPost("[controller]/[action]/{id}")]
        public IActionResult Edit(int id)
        {
            if (!HttpContext.Session.Keys.Contains("login"))
            {
                return RedirectToAction("Login", "Auth");
            }

            if (selectedComponents.Count == 0)
            {
                TempData.Add("error", "Заявка должна содержать компоненты");
                ViewData["currentRequest"] = _requestLogic.ReadElement(new RequestSearchModel() { ID = id });
                ViewData["components"] = _componentLogic.ReadList(null);
                ViewData["selectedComponents"] = selectedComponents;
                return View("Views/Request/Create.cshtml");
            }

            try
            {
                double tmpPrice = 0;
                foreach (var (componentId, count) in selectedComponents)
                {
                    tmpPrice += _componentLogic.ReadElement(new ComponentSearchModel() { ID = componentId })!.Price * count;
                }

                _requestLogic.Update(new RequestBindingModel()
                {
                    ID = id,
                    OrderID = _requestLogic.ReadElement(new RequestSearchModel() { ID = id })?.OrderID,
                    PCID = _requestLogic.ReadElement(new RequestSearchModel() { ID = id })?.PCID,
                    Price = tmpPrice,
                    RequestComponents = selectedComponents.Select(x => ((IComponentModel)_componentLogic.ReadElement(new ComponentSearchModel() { ID = x.componentId })!, x.count)).ToList(),
                });
                selectedComponents.Clear();
                return RedirectToAction("List", "Request", null);
            }
            catch (Exception e)
            {
                TempData.Add("error", Regex.Replace(e.Message, "[a-zA-Z\\(\\)']", ""));
                return RedirectToAction("View", "Request", new { id = id });
            }
        }

        [HttpPost("[controller]/[action]/{id}")]
        public IActionResult Delete(int id)
        {
            if (!HttpContext.Session.Keys.Contains("login"))
            {
                return RedirectToAction("Login", "Auth");
            }

            var deletedRequest = _requestLogic.ReadElement(new RequestSearchModel { ID = id });
            if (deletedRequest != null && deletedRequest.PCID == null && deletedRequest.OrderID == null)
            {
                _requestLogic.Delete(new RequestBindingModel() { ID = id });
            }

            return RedirectToAction("List", "Request", null);
        }

        [HttpPost("[controller]/[action]/{selectedcomponentid}/{currentrequestid}")]
        public IActionResult DeleteComponent(int selectedcomponentid, int currentrequestid)
        {
            if (!HttpContext.Session.Keys.Contains("login"))
            {
                return RedirectToAction("Login", "Auth");
            }

            selectedComponents.Remove(selectedComponents.FirstOrDefault(x => x.componentId == selectedcomponentid && x.count > 0));
            if (currentrequestid > 0)
            {
                ViewData["currentRequest"] = _requestLogic.ReadElement(new RequestSearchModel() { ID = currentrequestid });
                ViewData["components"] = _componentLogic.ReadList(null);
                ViewData["selectedComponents"] = selectedComponents;
                return View("Views/Request/Create.cshtml");
            }
            else
            {
                return RedirectToAction("CreatePage", "Request");
            }
        }
    }
}