using System;
using System.IO;
using System.Reflection;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using System.Text.Json.Serialization;
using BlueWest.Tools;
using BlueWest.WebApi.Interfaces;
using BlueWest.WebApi.Tools;
using Microsoft.OpenApi.Models;

namespace BlueWest.WebApi
{
    /// <summary>
    /// Startup class for the API.
    /// </summary>
    public class Startup
    {
        private readonly IConfiguration _configuration;
        private readonly IWebHostEnvironment _environment;
        private readonly string MyAllowSpecificOrigins = "_myAllowSpecificOrigins";

        /// <summary>
        /// Startup configuration of the API
        /// </summary>
        public Startup(IConfiguration configuration, IWebHostEnvironment hostEnvironment)
        {
            _configuration = configuration;
            _environment = hostEnvironment;
        }
 

        /// <summary>
        /// Configure Services
        /// </summary>
        /// <param name="services">Dependency injection</param>
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddCors(options =>
            {
                /*options.AddPolicy(name: MyAllowSpecificOrigins,
                    builder =>
                    {
                        builder.WithOrigins("http://localhost", "http://127.0.0.1", "http://localhost:3000",
                                "http://127.0.0.1:3000", "localhost:3000", "127.0.0.1:3000")
                            .AllowAnyHeader().AllowAnyMethod();
                    });*/
            });

            services
                .AddControllers()
                .AddJsonOptions(options => options.JsonSerializerOptions.ReferenceHandler = ReferenceHandler.Preserve);

            services
                .AddSwaggerGen(options =>
                {
                    options.SchemaFilter<SwaggerEnumSchemaFilter>();
                    options.SwaggerDoc("v1", new OpenApiInfo
                    {
                        Title = "BlueWest.Api.App",
                        Version = "v1"
                    });
                            
                    // Set the comments path for the Swagger JSON and UI.
                    var xmlFile = $"{Assembly.GetExecutingAssembly().GetName().Name}.xml";
                    var xmlPath = Path.Combine(AppContext.BaseDirectory, xmlFile);
                    options.IncludeXmlComments(xmlPath);
                });
            
            
            IConfigurationRoot configuration = new ConfigurationBuilder()
                .AddJsonFile("config.json")
                .Build();

            var allowedDatabase = configuration["database"];
            
            services
                .AddSingleton<EventManager>();

            switch (allowedDatabase)
            {
                case "mysql":
                    services.PrepareMySqlDatabasePool(_configuration, _environment);
                    break;
                
                case "sqlite":
                    services.PrepareSqlLiteDatabasePool(_configuration, _environment);
                    break;
                
                default:
                    throw new InvalidOperationException("config.json doesn't specify a valid database. Use mysql or sqlite.");
            }

            services.AddScoped<ExchangeInterface>();


            // services.AddGrpc();
        }
        
        
        
        /// <summary>
        /// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        /// </summary>
        /// <param name="app">Object with the necessary data to configure an application's request pipeline</param>
        /// <param name="env">Provides information about the web hosting environment an application is running in.</param>
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {

            //app.UseStaticFiles();

            app.UseDeveloperExceptionPage();
            app.UseSwagger();
            app.UseSwaggerUI(c =>
            {
                c.RoutePrefix = "swagger";
                c.SwaggerEndpoint("/swagger/v1/swagger.json", "BlueWest.Api v1");
            });

            //app.UseHttpsRedirection();

            app.UseRouting();
            app.UseCors(MyAllowSpecificOrigins);
            app.UseAuthorization();
            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();
                // endpoints.MapGrpcService<GreeterService>();
            });
        }
    }
}