using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.ApiExplorer;
using Microsoft.AspNetCore.Mvc.Versioning;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using ServerManager.WebApplication.Extensions;
using ServerManager.WebApplication.Services;

namespace ServerManager.WebApplication
{
    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.AddControllers();

            services.AddResponseCaching();

            /*
             * https://github.com/Microsoft/aspnet-api-versioning/wiki
             */
            services.AddApiVersioning(o =>
            {
                o.DefaultApiVersion = ApiVersion.Default;
                o.AssumeDefaultVersionWhenUnspecified = true;
                o.ReportApiVersions = true;
                o.ApiVersionReader = ApiVersionReader.Combine(
                    new MediaTypeApiVersionReader("Version"),
                    new HeaderApiVersionReader("X-Version")
                );
            });

            services.AddVersionedApiExplorer(o =>
            {
                // add the versioned api explorer, which also adds IApiVersionDescriptionProvider service
                // note: the specified format code will format the version as "'v'major[.minor][-status]"
                o.GroupNameFormat = "'v'VVV";
            });

            services.AddScoped<IServerQueryService, QueryMasterService>();

            services.AddSwaggerGen(o =>
            {
                o.OperationFilter<SwaggerDefaultValues>();
            });
        }

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

            var enableSwagger = Configuration.GetValue<bool>("EnableSwagger");
            if (enableSwagger)
            {
                var swaggerRoutePrefix = Configuration.GetValue<string>("SwaggerRoutePrefix");
                if (!string.IsNullOrWhiteSpace(swaggerRoutePrefix) && !swaggerRoutePrefix.EndsWith("/"))
                {
                    swaggerRoutePrefix += "/";
                }

                app.UseSwagger();
                app.UseSwaggerUI(o =>
                {
                    // build a swagger endpoint for each discovered API version
                    foreach (var description in provider.ApiVersionDescriptions)
                    {
                        o.SwaggerEndpoint($"/{swaggerRoutePrefix}swagger/{description.GroupName}/swagger.json", $"Server Managers API {description.GroupName.ToUpperInvariant()}");
                    }
                });
            }

            app.UseHttpsRedirection();

            app.UseRouting();

            app.UseResponseCaching();

            app.UseAuthorization();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();
            });
        }
    }
}
