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

namespace _2021_backend.Pages.Sessions
{
    public class DeleteModel : PageModel
    {
        private readonly _2021_backend.Data.BackendContext Context;

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

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

        public async Task<IActionResult> OnGetAsync(string? id)
        {
            int idx = int.Parse(id);
            if (id == null)
            {
                return NotFound();
            }

            InterviewTime = Context.Sessions.Find(idx);

            if (InterviewTime == null)
            {
                return NotFound();
            }
            return Page();
        }

        public async Task<IActionResult> OnPostAsync(string? id)
        {
            int idx = int.Parse(id);
            if (id == null)
            {
                return NotFound();
            }
            InterviewTime = await Context.Sessions.FindAsync(idx);

            if (InterviewTime != null)
            {
                if (InterviewTime.Students.Count > 0)
                {
                    foreach (var x in InterviewTime.Students)
                    {
                        Student stu = Context.Students.Find(x);
                        if (stu != null)
                        {
                            stu.InterviewTime = 0;
                            stu.Timelist.RemoveAll(it => it == idx);
                        }
                        Context.SaveChanges();
                    }
                }
                foreach(var x in Context.Students)
                {
                    x.Timelist.RemoveAll(it => it == idx);
                }
                Context.Sessions.Remove(InterviewTime);
                Context.SaveChanges();
            }

            return RedirectToPage("./Index");
        }
    }
}