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using System.Reflection;

namespace IOL.BookmarkThing.Server;

public class Startup
{
	public Startup(IConfiguration configuration, IWebHostEnvironment webHostEnvironment) {
		Configuration = configuration;
		WebHostEnvironment = webHostEnvironment;
	}

	private IWebHostEnvironment WebHostEnvironment { get; }
	private IConfiguration Configuration { get; }

	private string AppDatabaseConnectionString() {
		var host = Configuration.GetValue<string>("DB_HOST");
		var port = Configuration.GetValue<string>("DB_PORT");
		var database = Configuration.GetValue<string>("DB_NAME");
		var user = Configuration.GetValue<string>("DB_USER");
		var password = Configuration.GetValue<string>("DB_PASSWORD");
		return $"Server={host};Port={port};Database={database};User Id={user};Password={password}";
	}

	// This method gets called by the runtime. Use this method to add services to the container.
	public void ConfigureServices(IServiceCollection services) {
		services.AddDataProtection()
				.PersistKeysToFileSystem(new(AppPaths.DataProtectionKeys.HostPath));

		if (WebHostEnvironment.IsDevelopment()) {
			services.AddCors();
		}

		services.Configure(AppJsonSettings.Default);

		services.AddDbContext<AppDbContext>(options => {
			options.UseNpgsql(AppDatabaseConnectionString(),
							  builder => {
								  builder.UseQuerySplittingBehavior(QuerySplittingBehavior.SplitQuery);
								  builder.EnableRetryOnFailure(5, TimeSpan.FromSeconds(10), default);
							  })
				   .UseSnakeCaseNamingConvention();
			if (WebHostEnvironment.IsDevelopment()) {
				options.EnableSensitiveDataLogging();
			}
		});

		services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme)
				.AddCookie(options => {
					options.Cookie.Name = "bookmarkthing_session";
					options.Cookie.SameSite = SameSiteMode.Strict;
					options.Cookie.HttpOnly = true;
					options.Cookie.SecurePolicy = CookieSecurePolicy.SameAsRequest;
					options.Cookie.IsEssential = true;
					options.SlidingExpiration = true;
					options.Events.OnRedirectToAccessDenied =
							options.Events.OnRedirectToLogin = c => {
								c.Response.StatusCode = StatusCodes.Status401Unauthorized;
								return Task.FromResult<object>(null);
							};
				})
				.AddScheme<AuthenticationSchemeOptions, BasicAuthenticationHandler>(Constants.BASIC_AUTH_SCHEME, default);

		services.AddLogging();
		services.AddHttpClient();
		services.AddControllers()
				.AddJsonOptions(AppJsonSettings.Default);

		services.AddApiVersioning(options => {
			options.ApiVersionReader = new UrlSegmentApiVersionReader();
			options.ReportApiVersions = true;
			options.AssumeDefaultVersionWhenUnspecified = false;
		});
		services.AddVersionedApiExplorer(options => {
			options.SubstituteApiVersionInUrl = true;
		});
		services.AddSwaggerGen(options => {
			options.IncludeXmlComments(Path.Combine(AppContext.BaseDirectory, Assembly.GetExecutingAssembly().GetName().Name + ".xml"));
			options.UseApiEndpoints();
			options.OperationFilter<SwaggerDefaultValues>();
			options.SwaggerDoc(ApiSpecV1.Document.VersionName, ApiSpecV1.Document.OpenApiInfo);
			options.AddSecurityDefinition("Basic",
										  new OpenApiSecurityScheme {
												  Name = "Authorization",
												  Type = SecuritySchemeType.ApiKey,
												  Scheme = "Basic",
												  BearerFormat = "Custom",
												  In = ParameterLocation.Header,
												  Description =
														  "Enter your token in the text input below.\r\n\r\nExample: \"12345abcdef\"",
										  });

			options.AddSecurityRequirement(new OpenApiSecurityRequirement {
					{
							new OpenApiSecurityScheme {
									Reference = new OpenApiReference {
											Type = ReferenceType.SecurityScheme,
											Id = "Basic"
									}
							},
							Array.Empty<string>()
					}
			});
		});
	}

	// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
	public void Configure(IApplicationBuilder app) {
		if (WebHostEnvironment.IsDevelopment()) {
			app.UseDeveloperExceptionPage();
			app.UseCors(x => x
							 .AllowAnyMethod()
							 .AllowAnyHeader()
							 .SetIsOriginAllowed(_ => true) // allow any origin
							 .AllowCredentials()); // allow credentials
		}

		app.UseRouting();
		app.UseSerilogRequestLogging();
		app.UseStatusCodePages();
		app.UseAuthentication();
		app.UseAuthorization();
		app.UseEndpoints(endpoints => {
			endpoints.MapControllers();
		});
		app.UseSwagger();
		app.UseSwaggerUI(options => {
			options.SwaggerEndpoint(ApiSpecV1.Document.SwaggerPath, ApiSpecV1.Document.VersionName);
			options.DocumentTitle = Constants.API_NAME;
		});
	}
}