using System.Threading.Tasks;
using HN.Domain;
using HN.Infrastructure;
using MediatR;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

namespace Website
{
  public class LinkRepository : ILinkRepository
  {
    public Task AddAsync(Link link)
    {
      throw new System.NotImplementedException("link repository not implemented yet");
    }
  }

  public class Startup
  {
    public Startup(IConfiguration configuration)
    {
      Configuration = configuration;
    }

    public IConfiguration Configuration { get; }

    // This method gets called by the runtime. Use this method to add services to the container.
    public void ConfigureServices(IServiceCollection services)
    {
      services.AddDbContext<HNDbContext>(options => options.UseSqlite(Configuration.GetConnectionString("Default")));
      services.AddSingleton<ILinkRepository, LinkRepository>();
      services.AddControllersWithViews();
      services.AddMediatR(typeof(HN.Application.AddLinkCommand));
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
      MigrateDatabase(app);

      if (env.IsDevelopment())
      {
        app.UseDeveloperExceptionPage();
      }
      else
      {
        app.UseExceptionHandler("/Home/Error");
        // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
        app.UseHsts();
      }
      app.UseHttpsRedirection();
      app.UseStaticFiles();

      app.UseRouting();

      app.UseAuthorization();

      app.UseEndpoints(endpoints =>
      {
        endpoints.MapControllerRoute(
                  name: "default",
                  pattern: "{controller=Home}/{action=Index}/{id?}");
      });
    }

    /// <summary>
    /// Lance les migrations. En production, il est plutôt conseillé de générer
    /// les scripts avec `dotnet ef migrations script` et de les passer à la main. 
    /// </summary>
    /// <param name="app"></param>
    private void MigrateDatabase(IApplicationBuilder app)
    {
      using var scope = app.ApplicationServices.CreateScope();
      using var ctx = scope.ServiceProvider.GetRequiredService<HNDbContext>();
      ctx.Database.Migrate();
    }
  }
}