using System.Reflection;
using Microsoft.Extensions.Options;
using Microsoft.OpenApi.Models;
using StackExchange.Redis;
using SWAD.API.Middlewares;
using SWAD.API.Models.Config;
using SWAD.API.Models.Config.ApiServices;
using SWAD.API.Services.Links;
using SWAD.API.Services.MusicAPI.Api;
using SWAD.API.Services.MusicAPI.Auth;

namespace SWAD.API;

public static class Startup
{
    private static ServicesEndpointsConfig? _servicesEndpointsConfig;

    public static void Configure(WebApplicationBuilder builder)
    {
        SetConfigurations(builder);
    }

    public static void ConfigureServices(IServiceCollection services)
    {
        SetServiceUsages(services);
        SetCustomServices(services);
    }

    public static void ConfigureApplication(WebApplication app)
    {
        SetAppUsages(app);
        SetAppMappings(app);
    }

    private static void SetConfigurations(WebApplicationBuilder builder)
    {
        //Json config setup
        builder.Configuration.AddJsonFile("appsettings.json", false, true) //load base settings
            .AddJsonFile("appsettings.local.json", true, true); //load local settings

        builder.Services.Configure<ApiServicesConfig>
            (builder.Configuration.GetSection(ApiServicesConfig.ConfigName));
        builder.Services.Configure<ServicesEndpointsConfig>
            (builder.Configuration.GetSection(ServicesEndpointsConfig.ConfigName));

        //Get config for setup
        _servicesEndpointsConfig = builder.Configuration
            .GetSection(ServicesEndpointsConfig.ConfigName)
            .Get<ServicesEndpointsConfig>();
    }

    private static void SetServiceUsages(IServiceCollection services)
    {
        services.AddProblemDetails();
        services.AddControllers();

        services.AddSwaggerGen(options =>
        {
            options.SwaggerDoc("v1", new OpenApiInfo
            {
                Version = Assembly.GetExecutingAssembly().GetName().Version!.ToString(),
                Title = "SWAD.API",
                Description =
                    "Share With All, Dude - Platform for sharing music links from one music service to another for free!\n" +
                    "API Reference for SWAD.Front and for guys who trying to make themself stuff :)",
                TermsOfService = new Uri("https://github.com/SpectruMTeamCode/SWAD/tree/main"),
                Contact = new OpenApiContact
                {
                    Name = "GitHub",
                    Url = new Uri("https://github.com/SpectruMTeamCode/SWAD/tree/main")
                }
            });
            options.IncludeXmlComments(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "doc.xml"));
            options.ResolveConflictingActions(apiDescriptions => apiDescriptions.First());
        });
    }

    private static void SetCustomServices(IServiceCollection services)
    {
        //Custom services setup

        //TODO read from config
        services.AddSingleton(ConnectionMultiplexer.Connect(_servicesEndpointsConfig.Redis));
        services.AddSingleton(p =>
            p.GetService<ConnectionMultiplexer>()?.GetDatabase() ??
            throw new NullReferenceException("Чёт с инжектом редиса не то"));
        services.AddSingleton(p => ConnectionMultiplexer.Connect(_servicesEndpointsConfig.Redis));
        services.AddSingleton(p => p.GetService<ConnectionMultiplexer>()!.GetDatabase());
        services.AddSingleton<LinksService>();

        //Register all IAPIService implementations
        foreach (var service in ApiService.GetAllImplementations()) services.AddSingleton(typeof(ApiService), service);
        //Register all AuthService implementations
        foreach (var service in AbstractAuthService.GetAllImplementations())
            services.AddSingleton(typeof(AbstractAuthService), service);
    }

    private static void SetAppUsages(WebApplication app)
    {
        app.UseMiddleware<ExceptionMiddleware>();
        app.UseSwagger();
        app.UseSwaggerUI(options =>
        {
            options.InjectStylesheet("/swagger-ui/theme-flattop.css");
            options.IndexStream = () => Assembly.GetEntryAssembly()!.GetManifestResourceStream("SWAD.API.index.html");
        });
        app.UseStaticFiles();
    }

    private static void SetAppMappings(WebApplication app)
    {
        app.MapControllers();

        //Redirect to swagger
        app.Map("/", () => { return Results.LocalRedirect("/swagger"); });
    }
}