using _2021_backend.Models;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.AspNetCore.Mvc.Rendering;
using Microsoft.EntityFrameworkCore;
using System.ComponentModel.DataAnnotations;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace _2021_backend.Pages.Sessions
{
    public class EditModel : PageModel
    {
        public _2021_backend.Data.BackendContext Context;

        public EditModel(_2021_backend.Data.BackendContext context)
        {
            Context = context;
        }

        [BindProperty]
        public Session CurSession { get; set; }

        [BindProperty]
        public string Curint { get; set; }

        [BindProperty]
        public string ChiefSearch { get; set; }

        public List<SelectListItem> ChiefList { get; set; }

        public List<SelectListItem> Stulist { get; set; }

        [BindProperty]
        public int addedChief { get; set; }

        [BindProperty]
        public string addedStu { get; set; }

        [BindProperty]
        public string ChiefName { get; set; }




        [BindProperty]
        [Display(Name ="活动地点")]
        [RegularExpression(@"^20[04]$", ErrorMessage = "200或204")]
        [Required()]
        public string newPlace { get; set; }    


        [BindProperty]
        [DataType(DataType.Date)]
        [DisplayFormat(DataFormatString = "{0:d}", ApplyFormatInEditMode = true)]
        [Required()]
        public DateTime newDay { get; set; }    
        [BindProperty]
        [DataType(DataType.Time)]
        [DisplayFormat(DataFormatString = "{0:t}", ApplyFormatInEditMode = true)]
        [Required()]
        public DateTime newTime { get; set; }
        
        [BindProperty]
        [Required()]
        public bool sendSMS { get; set; }   
        [BindProperty]
        public int newCapacity {  get; set; }

        public IActionResult Construct(string id)
        {
            int idx = int.Parse(id);
            if (id == null)
            {
                return NotFound();
            }
            Curint = id;
            CurSession = Context.Sessions.Find(idx);

            newDay = CurSession.Day;
            newTime = CurSession.BeginTime;
            newCapacity = CurSession.Capacity;  
            sendSMS = CurSession.SendSMS;
            newPlace = CurSession.Place;    

            if (CurSession == null) return RedirectToPage("./Index", new { errmsg = "未找到该活动场次" });
            var qlst = from e in Context.Users select (new SelectListItem { Value = e.Id.ToString(), Text = e.Name, Selected = false, Disabled = false });
            ChiefList = qlst.ToList().Distinct().ToList();

            var slst = from e in Context.Students where e.InterviewTime == 0 select new SelectListItem { Value = e.Id.ToString(), Text = e.Name, Selected = false, Disabled = false };
            Stulist = slst.ToList().Distinct().ToList();
            return Page();
        }

        public async Task<IActionResult> OnGetAsync(string id)
        {
            return Construct(id);
        }

        // To protect from overposting attacks, enable the specific properties you want to bind to, for
        // more details, see https://aka.ms/RazorPagesCRUD.
        public async Task<IActionResult> OnPostAsync()
        {
            var ssn = Context.Sessions.Find(int.Parse(Curint));
            ssn.SendSMS = sendSMS;
            ssn.Day = newDay;
            ssn.BeginTime = newTime;
            ssn.Capacity = newCapacity;
            ssn.Place = newPlace;
            Context.SaveChanges();

            return RedirectToPage("./Index");
        }

        public async Task<IActionResult> OnPostDeleteAsync(string id)
        {
            CurSession = Context.Sessions.Find(int.Parse(Curint));
            var idx = int.Parse(id);
            if (!string.IsNullOrEmpty(id))
            {
                if (Context.Students.Any(it => it.Id == idx))
                {
                    Context.Students.Find(idx).InterviewTime = 0;
                    CurSession.Students.RemoveAll(it => it == idx);
                }
                Context.SaveChanges();
            }
            return Construct(Curint);
        }

        public async Task<IActionResult> OnPostAddAsync()
        {
            CurSession = Context.Sessions.Find(int.Parse(Curint));
            var idx = int.Parse(addedStu);
            if (!string.IsNullOrEmpty(addedStu))
            {
                if (Context.Students.Any(it => it.Id == idx))
                {
                    var stu = Context.Students.Find(idx);
                    if(stu.InterviewTime != 0)
                    {
                        var oldtime = Context.Sessions.Find(stu.InterviewTime);
                        if(oldtime != null)
                        {
                            oldtime.Students.RemoveAll(s => s == stu.Id);
                            Context.SaveChanges();
                        }
                    }
                    stu.InterviewTime = CurSession.Id;
                    stu.Status = status.已选时间;
                    CurSession.Students.Add(idx);
                }
                Context.SaveChanges();
            }
            return Construct(Curint);
        }

        public async Task<IActionResult> OnPostAddChiefAsync()
        {
            CurSession = Context.Sessions.Find(int.Parse(Curint));
            if (Context.Users.Any(it => it.Id == addedChief))
            {
                CurSession.Chiefs.Add(addedChief);
            }
            Context.SaveChanges();
            return Construct(Curint);
        }

        public async Task<IActionResult> OnPostDeleteChiefAsync(string id)
        {
            var idx = int.Parse(id);
            CurSession = Context.Sessions.Find(int.Parse(Curint));
            if (CurSession.Chiefs.Contains(idx))
            {
                CurSession.Chiefs.Remove(idx);
            }
            Context.SaveChanges();
            return Construct(Curint);
        }

        private bool InterviewTimeExists(int id)
        {
            return Context.Sessions.Any(e => e.Id == id);
        }
    }
}