/******************************************************************************
// MARECHAI: Master repository of computing history artifacts information
// ----------------------------------------------------------------------------
//
// Filename       : CompanyDescriptionsController.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// --[ Description ] ----------------------------------------------------------
//
//     Company descriptions admin controller
//
// --[ License ] --------------------------------------------------------------
//
//     This program is free software: you can redistribute it and/or modify
//     it under the terms of the GNU General Public License as
//     published by the Free Software Foundation, either version 3 of the
//     License, or (at your option) any later version.
//
//     This program is distributed in the hope that it will be useful,
//     but WITHOUT ANY WARRANTY; without even the implied warranty of
//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//     GNU General Public License for more details.
//
//     You should have received a copy of the GNU General Public License
//     along with this program.  If not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Copyright © 2003-2020 Natalia Portillo
*******************************************************************************/

using System.Linq;
using System.Threading.Tasks;
using Marechai.Areas.Admin.Models;
using Marechai.Database.Models;
using Markdig;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Rendering;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Query;

namespace Marechai.Areas.Admin.Controllers
{
    [Area("Admin"), Authorize]
    public class CompanyDescriptionsController : Controller
    {
        readonly MarechaiContext  _context;
        readonly MarkdownPipeline pipeline;

        public CompanyDescriptionsController(MarechaiContext context)
        {
            pipeline = new MarkdownPipelineBuilder().UseAdvancedExtensions().Build();
            _context = context;
        }

        // GET: CompanyDescription
        public async Task<IActionResult> Index()
        {
            IIncludableQueryable<CompanyDescription, Company> marechaiContext =
                _context.CompanyDescriptions.Include(c => c.Company);

            return View(await marechaiContext.OrderBy(c => c.Company.Name).Select(c => new CompanyDescriptionViewModel
            {
                Id = c.Id, Company = c.Company.Name
            }).ToListAsync());
        }

        // GET: CompanyDescription/Details/5
        public async Task<IActionResult> Details(int? id)
        {
            if(id == null)
                return NotFound();

            CompanyDescription companyDescription =
                await _context.CompanyDescriptions.Include(c => c.Company).FirstOrDefaultAsync(m => m.Id == id);

            if(companyDescription == null)
                return NotFound();

            return View(companyDescription);
        }

        // GET: CompanyDescription/Create
        public IActionResult Create()
        {
            ViewData["CompanyId"] = new SelectList(_context.Companies.OrderBy(c => c.Name), "Id", "Name");

            return View();
        }

        // POST: CompanyDescription/Create
        // To protect from overposting attacks, please 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,CompanyId,Text")] CompanyDescription companyDescription)
        {
            if(ModelState.IsValid)
            {
                companyDescription.Html = Markdown.ToHtml(companyDescription.Text, pipeline);
                _context.Add(companyDescription);
                await _context.SaveChangesAsync();

                return RedirectToAction(nameof(Index));
            }

            ViewData["CompanyId"] = new SelectList(_context.Companies.OrderBy(c => c.Name), "Id", "Name",
                                                   companyDescription.CompanyId);

            return View(companyDescription);
        }

        // GET: CompanyDescription/Edit/5
        public async Task<IActionResult> Edit(int? id)
        {
            if(id == null)
                return NotFound();

            CompanyDescription companyDescription = await _context.CompanyDescriptions.FindAsync(id);

            if(companyDescription == null)
                return NotFound();

            ViewData["CompanyId"] = new SelectList(_context.Companies.OrderBy(c => c.Name), "Id", "Name",
                                                   companyDescription.CompanyId);

            return View(companyDescription);
        }

        // POST: CompanyDescription/Edit/5
        // To protect from overposting attacks, please 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,CompanyId,Text")] CompanyDescription companyDescription)
        {
            if(id != companyDescription.Id)
                return NotFound();

            if(ModelState.IsValid)
            {
                try
                {
                    companyDescription.Html = Markdown.ToHtml(companyDescription.Text, pipeline);
                    _context.Update(companyDescription);
                    await _context.SaveChangesAsync();
                }
                catch(DbUpdateConcurrencyException)
                {
                    if(!CompanyDescriptionExists(companyDescription.Id))
                        return NotFound();

                    throw;
                }

                return RedirectToAction(nameof(Index));
            }

            ViewData["CompanyId"] = new SelectList(_context.Companies.OrderBy(c => c.Name), "Id", "Name",
                                                   companyDescription.CompanyId);

            return View(companyDescription);
        }

        // GET: CompanyDescription/Delete/5
        public async Task<IActionResult> Delete(int? id)
        {
            if(id == null)
                return NotFound();

            CompanyDescription companyDescription =
                await _context.CompanyDescriptions.Include(c => c.Company).FirstOrDefaultAsync(m => m.Id == id);

            if(companyDescription == null)
                return NotFound();

            return View(companyDescription);
        }

        // POST: CompanyDescription/Delete/5
        [HttpPost, ActionName("Delete"), ValidateAntiForgeryToken]
        public async Task<IActionResult> DeleteConfirmed(int id)
        {
            CompanyDescription companyDescription = await _context.CompanyDescriptions.FindAsync(id);
            _context.CompanyDescriptions.Remove(companyDescription);
            await _context.SaveChangesAsync();

            return RedirectToAction(nameof(Index));
        }

        bool CompanyDescriptionExists(int id) => _context.CompanyDescriptions.Any(e => e.Id == id);
    }
}