using GameIdeas.Resources;
using GameIdeas.Shared.Model;
using GameIdeas.WebAPI.Context;
using GameIdeas.WebAPI.Services.Categories;
using GameIdeas.WebAPI.Services.Games;
using GameIdeas.WebAPI.Services.Users;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
using Microsoft.IdentityModel.Tokens;
using System.Text;

var builder = WebApplication.CreateBuilder(args);
var services = builder.Services;

#if DEBUG
LoadEnvironmentVariable("../../../../.env");
#else
LoadEnvironmentVariable("../.env");
#endif

Action<DbContextOptionsBuilder> dbContextOptions = options =>
{
    options.UseNpgsql(
        GetConnectionString(),
        npgOption =>
        {
            npgOption.CommandTimeout(60);
            npgOption.MigrationsAssembly("GameIdeas.WebAPI");
        });
};

// Add services to the container.
services.AddDbContext<GameIdeasContext>(dbContextOptions);

services.AddIdentity<User, IdentityRole>()
    .AddEntityFrameworkStores<GameIdeasContext>()
    .AddDefaultTokenProviders();

var jwtKey = Environment.GetEnvironmentVariable("JWT_KEY")
    ?? throw new ArgumentNullException(message: "Invalid key for JWT token", null); 

services.AddAuthentication(options =>
{
    options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
    options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
})
.AddJwtBearer(options =>
{
    options.TokenValidationParameters = new TokenValidationParameters
    {
        ValidateIssuer = true,
        ValidateAudience = true,
        ValidateLifetime = true,
        ValidateIssuerSigningKey = true,
        ValidIssuer = Environment.GetEnvironmentVariable("JWT_ISSUER"),
        ValidAudience = Environment.GetEnvironmentVariable("JWT_AUDIENCE"),
        IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(jwtKey))
    };
});

services.Configure<IdentityOptions>(options =>
{
    // Default Password settings.
    options.Password.RequireDigit = false;
    options.Password.RequireLowercase = false;
    options.Password.RequireNonAlphanumeric = false;
    options.Password.RequireUppercase = false;
    options.Password.RequiredLength = 6;
    options.Password.RequiredUniqueChars = 1;
});

services.AddAuthorization();

services.AddSingleton<TranslationService>();
services.AddSingleton<Translations>();

services.AddScoped<IUserReadService, UserReadService>();
services.AddScoped<IUserWriteService, UserWriteService>();
services.AddScoped<IGameReadService, GameReadService>();
services.AddScoped<IGameWriteService, GameWriteService>();
services.AddScoped<ICategoryService, CategoryService>();

services.AddAutoMapper(AppDomain.CurrentDomain.GetAssemblies());

services.AddControllers();

// Learn more about configuring OpenAPI at https://aka.ms/aspnet/openapi
services.AddOpenApi();

services.AddCors(option => option.AddDefaultPolicy(policy =>
    policy.AllowAnyOrigin()
        .AllowAnyHeader()
        .WithMethods("GET", "POST", "PUT", "DELETE")));

var app = builder.Build();

using (var scope = app.Services.CreateScope())
{
    var db = scope.ServiceProvider.GetRequiredService<GameIdeasContext>();
    await db.Database.MigrateAsync();
}

await LoadTranslations();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.MapOpenApi();
}

app.UseCors();
app.UseAuthorization();

app.MapControllers();

app.Run();

async Task LoadTranslations()
{
    var filesDirectory = Path.Combine(Directory.GetCurrentDirectory(), "Files");
    var translationFiles = Directory.GetFiles(filesDirectory, "*.json");
    var dictionary = new Dictionary<string, string>();
    foreach (var file in translationFiles)
    {
        var name = file.Split('.');
        var culture = name[^2];
        var content = await File.ReadAllTextAsync(file);
        dictionary.Add(culture, content);
    }

    app.Services.GetRequiredService<TranslationService>().Initialize(dictionary);
    ResourcesKey.Initialize(app.Services.GetRequiredService<Translations>());

}

string GetConnectionString()
{
    var host = Environment.GetEnvironmentVariable("DB_HOST");
    var login = Environment.GetEnvironmentVariable("DB_USERNAME");
    var pass = Environment.GetEnvironmentVariable("DB_PASSWORD");
    var database = Environment.GetEnvironmentVariable("DB_DATABASE");

    return $"Host={host};Username={login};Password={pass};Database={database}";
}

static void LoadEnvironmentVariable(string filePath)
{
    if (!File.Exists(filePath))
        return;

    foreach (var line in File.ReadAllLines(filePath))
    {
        var parts = line.Split(
            '=',
            StringSplitOptions.RemoveEmptyEntries);

        if (parts.Length != 2)
            continue;

        Environment.SetEnvironmentVariable(parts[0], parts[1]);
    }
}