using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.AspNetCore.Mvc.Rendering;
 using Microsoft.EntityFrameworkCore;
 using BookStore3.Data;
 using BookStore3.Models;

 namespace BookStore3.Controllers {
   public class AuthorsController : Controller {
     private readonly BookStore3Context _context;
     public AuthorsController( BookStore3Context context ) { _context = context; }

     // GET: Authors
     public async Task<IActionResult> Index( ) {
       var bookStore3Context = _context.Author.Include( a => a.Book );
       return View( await bookStore3Context.ToListAsync( ) );
     }

     // GET: Authors/Details/5
     public async Task<IActionResult> Details( int? id ) {
       if ( id == null ) { return NotFound( ); }
       var author = await _context.Author
           .Include( a => a.Book )
           .FirstOrDefaultAsync( m => m.Id == id );
       if ( author == null ) { return NotFound( ); }
       return View( author );
     }

     // GET: Authors/Create
     public IActionResult Create( ) {
       ViewData["BookId"] = new SelectList( _context.Book, "Id", "Title" );
       return View( );
     }

     // POST: Authors/Create
     // To protect from overposting attacks,
     //   enable the specific properties you want to bind to.
     // For more details, see http://go.microsoft.com/fwlink/?LinkId=317598.
     [ HttpPost ]
     [ ValidateAntiForgeryToken ]
     public async Task<IActionResult> Create(
           [ Bind( "Id,Name, BookId" ) ] Author author ) {
       if ( ModelState.IsValid ) {
         _context.Add( author );
         await _context.SaveChangesAsync( );
         return RedirectToAction( nameof( Index ) );
       }
       ViewData["BookId"] = new SelectList(
           _context.Book, "Id", "Title", author.BookId );
       return View( author );
     }

     // GET: Authors/Edit/5
     public async Task<IActionResult> Edit( int? id ) {
       if ( id == null ) { return NotFound( ); }
       var author = await _context.Author.FindAsync( id );
       if ( author == null ) { return NotFound( ); }
       ViewData["BookId"] = new SelectList(
           _context.Book, "Id", "Title", author.BookId );
       return View( author );
     }

     // POST: Authors/Edit/5
     // To protect from overposting attacks,
     //   enable the specific properties you want to bind to.
     // For more details, see http://go.microsoft.com/fwlink/?LinkId=317598.
     [ HttpPost ]
     [ ValidateAntiForgeryToken ]
     public async Task<IActionResult> Edit(
           int id, [ Bind( "Id, Name, BookId " ) ] Author author ) {
       if ( id != author.Id ) { return NotFound( ); }
       if ( ModelState.IsValid ) {
         try {
           _context.Update( author );
           await _context.SaveChangesAsync( );
         }
         catch ( DbUpdateConcurrencyException ) {
           if ( !AuthorExists( author.Id ) ) { return NotFound( ); }
           else { throw; }
         }
         return RedirectToAction( nameof( Index ) );
       }
       ViewData["BookId"] = new SelectList(
           _context.Book, "Id", "Title", author.BookId);
       return View( author );
     }

     // GET: Authors/Delete/5
     public async Task<IActionResult> Delete( int? id ) {
       if ( id == null ) { return NotFound( ); }
       var author = await _context.Author
           .Include( a => a.Book )
           .FirstOrDefaultAsync( m => m.Id == id );
       if ( author == null ) { return NotFound( ); }
       return View( author );
     }

     // POST: Authors/Delete/5
     [ HttpPost, ActionName( "Delete" ) ]
     [ ValidateAntiForgeryToken ]
     public async Task<IActionResult> DeleteConfirmed( int id ) {
       var author = await _context.Author.FindAsync( id );
       if ( author != null ) { _context.Author.Remove( author ); }
       await _context.SaveChangesAsync( );
       return RedirectToAction( nameof( Index ) );
     }

     private bool AuthorExists( int id ) {
       return _context.Author.Any( e => e.Id == id );
     }
   }
 }