using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.EntityFrameworkCore;
using EveryThing.Data;
using EveryThing.Models;
using EveryThing.Models.Project;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Mvc.Rendering;
using DocumentFormat.OpenXml.Bibliography;

namespace EveryThing.Pages.Projects
{
    [Authorize(Roles = "Administrator,ProjecThingUser")]
    public class IndexModel : PageModel
    {
        private readonly ApplicationDbContext _context;
        private readonly UserManager<IdentityApplicationUser> _userManager;

        public IndexModel(ApplicationDbContext context, UserManager<IdentityApplicationUser> userManager)
        {
            _context = context;
            _userManager = userManager;
        }

        public IList<Project> Project { get;set; }
        public string Year { get; set; }
        

        public async Task OnGetAsync(string searchString, string finishedProjects, string openProjects, string offerProjects, string inProductionProjects, string year)
        {
            ViewData["SearchString"] = searchString;
            ViewData["FinishedProjects"] = finishedProjects == "on" ? "checked" : "";
            ViewData["OpenProjects"] = openProjects == "on" ? "checked" : "";
            ViewData["OffersProjects"] = offerProjects == "on" ? "checked" : "";
            ViewData["InProductionProjects"] = inProductionProjects == "on" ? "checked" : "";
            
            Year = year;
            Year ??= DateTime.Now.Year.ToString();

            ViewData["Years"] = new SelectList(Enumerable.Range(2022, (DateTime.Now.Year - 2022) + 2));

            Project = new List<Project>();

            await _context.Projects
                .Include(p => p.Company)
                .Include(p => p.Partner)
                .Include(x => x.ProjectProjectPart)
                .ThenInclude(x => x.ProjectPartProjectPartItem)
                .Where(x => x.ProjectYear == Convert.ToInt32(Year))
                .ForEachAsync(x =>
                {
                    x.FirstDeliveryDate = x.ProjectProjectPart.Max(y => y.ProjectPartProjectPartItem
                        .Where(a => a.Status == ProjectPartItemStatus.InProduction ||
                                    a.Status == ProjectPartItemStatus.Opened).Max(z => z.DeliveryDate)) == null
                        ? DateTime.MaxValue
                        : x.ProjectProjectPart.Max(y =>
                            y.ProjectPartProjectPartItem.Where(a =>
                                a.Status == ProjectPartItemStatus.InProduction ||
                                a.Status == ProjectPartItemStatus.Opened).Max(z => z.DeliveryDate));
                    Project.Add(x);
                });

            Project = Project.OrderBy(x => (int)x.Status)
                .ThenBy(x => x.FirstDeliveryDate)
                .ToList();

            var listStatus = new List<ProjectStatus>();
            // Active companies
            if (!string.IsNullOrEmpty(finishedProjects) 
                && finishedProjects == "on")
            {
                listStatus.Add(ProjectStatus.Finished);
                
            }

            if (!string.IsNullOrEmpty(openProjects)
                     && openProjects == "on")
            {
                listStatus.Add(ProjectStatus.Opened);
            }

            if (!string.IsNullOrEmpty(offerProjects)
                     && offerProjects == "on")
            {
                listStatus.Add(ProjectStatus.Offer);
            }

            if (!string.IsNullOrEmpty(inProductionProjects)
                     && inProductionProjects == "on")
            {
                listStatus.Add(ProjectStatus.InProduction);
            }

            if (listStatus.Count > 0)
            {
                Project = Project.Where(s => listStatus.Contains(s.Status)).ToList();
            }

            // Search string
            if (!string.IsNullOrEmpty(searchString))
            {
                Project = Project
                    .Where(s => s.Title.Contains(searchString, StringComparison.InvariantCultureIgnoreCase) 
                        || s.Partner.Title.Contains(searchString, StringComparison.InvariantCultureIgnoreCase)
                        || (s.Description != null && s.Description.Contains(searchString, StringComparison.InvariantCultureIgnoreCase))
                        || s.ProjectNumberFormatted.Contains(searchString, StringComparison.CurrentCultureIgnoreCase))
                    .ToList();
            }
        }

        public IActionResult OnDeleteProject(int idProject)
        {
            var user = _userManager.GetUserAsync(User).Result;
            bool successful = true;
            string error = "";

            var project = _context.Projects
                .Include(x => x.ProjectProjectPart)
                    .ThenInclude(x => x.ProjectPartProjectPartItem)
                        .ThenInclude(x => x.InvoiceItem)
                .Where(x => x.IdCompanyFk == user.IdCompanyFk)
                .FirstOrDefault(x => x.IdProject == idProject);


            if (project == null)
            {
                successful = false;
                error = $"Project with ID: {idProject} not found";
            }
            else if (project.ProjectProjectPart.Any(x => x.ProjectPartProjectPartItem.Any(x => x.InvoiceItem.Count > 0)))
            {
                successful = false;
                error = $"Projekt ima vezane dokumente fakturiranja!\nBrisanje ni možno!";
            }
            else
            {
                var projectParts = _context.ProjectParts.Where(x => x.IdProjectFk == idProject).ToList();

                for (int i = 0; i < projectParts.Count(); i++)
                {
                    var part = projectParts[i];
                    var projectPartItems = _context.ProjectPartItems.Where(x => x.IdProjectPartFk == part.IdProjectPart).ToList();

                    for (int j = 0; j < projectPartItems.Count; j++)
                    {
                        _context.ProjectPartItems.Remove(projectPartItems[j]);
                    }

                    _context.ProjectParts.Remove(part);
                }
                _context.Projects.Remove(project);
                _context.SaveChanges();
            }

            return new JsonResult(new { idProject = idProject, error = error, successful = successful });
        }

        public IActionResult OnPostCopyProject(int idProject)
        {
            var user = _userManager.GetUserAsync(User).Result;
            bool successful = true;
            string error = "";

            var project = _context.Projects
                .FirstOrDefault(x => x.IdCompanyFk == user.IdCompanyFk && x.IdProject == idProject);

            if (project != null)
            {
                var newProject = new Project
                {
                    IdCompanyFk = user.IdCompanyFk,
                    Status = ProjectStatus.Opened,
                    BuyersOrderNumber = project.BuyersOrderNumber,
                    Description = project.Description,
                    IdPartnerFk = project.IdPartnerFk,
                    ProjectYear = DateTime.Now.Year,
                    ProjectNumber = _context.Projects.Where(x => x.IdCompanyFk == user.IdCompanyFk && x.ProjectYear == DateTime.Now.Year).Max(x => x.ProjectNumber) + 1,
                    Title = project.Title,
                };

                if (newProject.ProjectNumber <= 0)
                    newProject.ProjectNumber = 1;

                _context.Projects.Add(newProject);

                _context.SaveChanges();

                var projectParts = _context.ProjectParts.Where(x => x.IdProjectFk == project.IdProject)
                    .OrderBy(x => x.ProjectPartNumber).ThenBy(x => x.IdProjectFk).ToList();

                var projectPartCounter = 1;
                foreach (var projectPart in projectParts)
                {
                    var newProjectPart = new ProjectPart
                    {
                        IdProjectFk = newProject.IdProject,
                        Description = projectPart.Description,
                        //FinishedDate = item.FinishedDate,
                        PathOfPlans = projectPart.PathOfPlans,
                        ShippedDate = projectPart.ShippedDate,
                        Status = projectPart.Status,
                        Title = projectPart.Title,
                        ProjectPartNumber = projectPartCounter
                    };

                    _context.ProjectParts.Add(newProjectPart);

                    _context.SaveChanges();

                    var projectPartItemCounter = 1;
                    foreach (var projectPartItem in _context.ProjectPartItems.Where(x => x.IdProjectPartFk == projectPart.IdProjectPart).ToList())
                    {
                        var newProjectPartItem = new ProjectPartItem
                        {
                            IdItemFk = projectPartItem.IdItemFk,
                            IdMaterialFk = projectPartItem.IdMaterialFk,
                            IdMaterialSupplierFk = projectPartItem.IdMaterialSupplierFk,
                            IdProjectPartFk = newProjectPart.IdProjectPart,
                            MaterialDimensions = projectPartItem.MaterialDimensions,
                            MaterialPrice = projectPartItem.MaterialPrice,
                            NumberOfItems = projectPartItem.NumberOfItems,
                            NumberOfItemsFinished = projectPartItem.NumberOfItemsFinished,
                            WorkPrice = projectPartItem.WorkPrice,
                            NumberOfSets = projectPartItem.NumberOfSets,
                            Status = ProjectPartItemStatus.Opened,
                            SellingPrice = projectPartItem.SellingPrice,
                            ProjectPartItemNumber = projectPartItemCounter
                        };
                        _context.ProjectPartItems.Add(newProjectPartItem);

                        projectPartItemCounter++;
                    }
                    _context.SaveChanges();

                    projectPartCounter++;
                }
            }
            else
            {
                successful = false;
                error = $"Project with ID: {idProject} not found";
            }

            return new JsonResult(new { error, successful });
        }
    }
}