using HealthChecks.UI.Client;
using Microsoft.AspNetCore.Diagnostics.HealthChecks;
using Microsoft.AspNetCore.Identity.UI.Services;
using Microsoft.AspNetCore.Localization;
using Microsoft.CodeAnalysis.FlowAnalysis;
using Microsoft.Extensions.Diagnostics.HealthChecks;
using StackExchange.Redis;
using StackExchange.Redis.Extensions.Core.Configuration;
using StackExchange.Redis.Extensions.Newtonsoft;
using System.Globalization;
using System.Text.Json.Serialization;
using WebDoorCreator.Data;
using WebDoorCreator.Data.Services;

var builder = WebApplication.CreateBuilder(args);



// configuration setup
ConfigurationManager configuration = builder.Configuration;

// Redis
var connStringRedis = configuration.GetConnectionString("Redis");
if (string.IsNullOrEmpty(connStringRedis))
{
    connStringRedis = "localhost:6379, DefaultDatabase=11, connectTimeout=5000, syncTimeout=5000, asyncTimeout=5000, abortConnect=false, ssl=false";
}
string redisSrvAddr = connStringRedis.Substring(0, connStringRedis.IndexOf(":"));
// avvio oggetto shared x redis...
var redisMultiplexer = ConnectionMultiplexer.Connect(connStringRedis);

// Add services to the container.
builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

// APP MAIN setup
string connectionString = configuration.GetConnectionString("WDC.DB") ?? "";
string dbServerAddr = "127.0.0.1";

if (string.IsNullOrEmpty(connectionString))
{
    connectionString = "Server=SQL2016DEV;Database=WebDoorCreator; User ID=sa;Password=keyhammer16; integrated security=False; MultipleActiveResultSets=True; App=WebDoorCreator.SRV;";
}
else
{
    if (connectionString.Contains("Server"))
    {
        bool trovato = false;
        var dbTokens = connectionString.Split(";");
        int numTok = dbTokens.Count();
        int idx = 0;
        while (!trovato && idx < numTok)
        {
            if (dbTokens[idx].StartsWith("Server="))
            {
                // rimuovo la chaive Server...
                dbServerAddr = dbTokens[idx].Replace("Server=", "");
                // se ci fosse un nome (tipo \\sqlexpress) rimuovo...
                if (dbServerAddr.Contains("\\"))
                {
                    int sIdx = dbServerAddr.IndexOf("\\");
                    dbServerAddr = dbServerAddr.Substring(0, sIdx);
                }
                trovato = true;
            }
            idx++;
        }
    }
}

// healthchecks
builder.Services.AddHealthChecks()
    .AddSqlServer(connectionString, healthQuery: "SELECT 1;", name: "SqlServer", failureStatus: HealthStatus.Degraded, tags: new string[] { "DB", "MsSql" })
    .AddAsyncCheck($"DB PING ({dbServerAddr})", () => WebDoorCreator.API.Health.Checks.PingCheck(dbServerAddr))
    .AddAsyncCheck($"Redis PING ({redisSrvAddr})", () => WebDoorCreator.API.Health.Checks.PingCheck(redisSrvAddr))
    // 512 MB max allocated memory
    .AddProcessAllocatedMemoryHealthCheck(512, "Max Process memory (<512MB)", failureStatus: HealthStatus.Degraded)
    .AddRedis(connStringRedis, "Redis", failureStatus: HealthStatus.Degraded)
    .AddAsyncCheck($"Config Table", () => WebDoorCreator.API.Health.Checks.ConfigCount(configuration))
    .AddAsyncCheck($"Orders Table", () => WebDoorCreator.API.Health.Checks.OrdersCount(configuration))
    .AddAsyncCheck($"Doors Table", () => WebDoorCreator.API.Health.Checks.DoorsCount(configuration))
    ;

#if false
builder.Services
.AddHealthChecksUI(s =>
{
  s.AddHealthCheckEndpoint("WDC_API_HC", "health");
  s.SetEvaluationTimeInSeconds(60);
  s.SetMinimumSecondsBetweenFailureNotifications(120);
  s.SetApiMaxActiveRequests(5);
  s.SetHeaderText("WDC.API Health Check Status");
})
.AddInMemoryStorage(); 
#endif

// abilitazione x email management con MailKit
//builder.Services.AddTransient<IEmailSender, MailKitEmailSender>();
builder.Services.AddSingleton<IEmailSender, MailKitEmailSender>();
builder.Services.Configure<MailKitEmailSenderOptions>(options =>
{
    options.Host_Address = configuration["ExternalProviders:MailKit:SMTP:Address"] ?? "";
    options.Host_Port = Convert.ToInt32(configuration["ExternalProviders:MailKit:SMTP:Port"] ?? "");
    options.Host_Username = configuration["ExternalProviders:MailKit:SMTP:Account"] ?? "";
    options.Host_Password = configuration["ExternalProviders:MailKit:SMTP:Password"] ?? "";
    options.Sender_EMail = configuration["ExternalProviders:MailKit:SMTP:SenderEmail"] ?? "";
    options.Sender_Name = configuration["ExternalProviders:MailKit:SMTP:SenderName"] ?? "";
});

// aggiunta servizi x accesso dati...
builder.Services.AddControllers()
   .AddJsonOptions(c => c.JsonSerializerOptions.ReferenceHandler = ReferenceHandler.Preserve);

builder.Services.AddStackExchangeRedisExtensions<NewtonsoftSerializer>((options) =>
{
    List<RedisConfiguration> newConf = new List<RedisConfiguration>();
    var currConf = configuration.GetSection("Redis").Get<RedisConfiguration>();
    if (currConf != null)
    {
        newConf.Add(currConf);
    }
    return newConf;
    //return configuration.GetSection("Redis").Get<RedisConfiguration>();
});

builder.Services.AddSingleton<QueueDataService>();
builder.Services.AddSingleton<WebDoorCreatorService>();
builder.Services.AddSingleton<IConnectionMultiplexer>(redisMultiplexer);

var app = builder.Build();

// Configure the HTTP request pipeline.

// abilitato temporaneamente anche in iis01...
if (app.Environment.IsDevelopment() || app.Environment.IsStaging())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

app.UseHttpsRedirection();

app.UseAuthorization();

app.MapControllers();

// config healthcheck: https://learn.microsoft.com/en-us/aspnet/core/host-and-deploy/health-checks
// prende tutti i predicati
app.MapHealthChecks("/health", new HealthCheckOptions
{
    Predicate = _ => true,
    ResponseWriter = UIResponseWriter.WriteHealthCheckUIResponse
});

// nasconde tutti i dettagli
app.MapHealthChecks("/health/live", new HealthCheckOptions
{
    Predicate = _ => false
});

app.Run();