using System.IdentityModel.Tokens.Jwt;
using System.Security.Claims;
using System.Text;
using Azaion.Common;
using Azaion.Common.Configs;
using Azaion.Common.Database;
using Azaion.Common.Entities;
using Azaion.Common.Requests;
using Azaion.Services;
using FluentValidation;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.Extensions.Options;
using Microsoft.IdentityModel.Tokens;

var builder = WebApplication.CreateBuilder(args);
builder.Configuration.AddEnvironmentVariables();

var jwtConfig = builder.Configuration.GetSection(nameof(JwtConfig)).Get<JwtConfig>();
if (jwtConfig == null)
    throw new Exception("Missing configuration section: JwtConfig");
var signingKey = new SymmetricSecurityKey(Encoding.ASCII.GetBytes(jwtConfig.Secret));

builder.Services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
    .AddJwtBearer(o =>
    {
        o.TokenValidationParameters = new TokenValidationParameters
        {
            ValidateIssuer = true,
            ValidateAudience = true,
            ValidateLifetime = true,
            ValidateIssuerSigningKey = true,
            ValidIssuer = jwtConfig.Issuer,
            ValidAudience = jwtConfig.Audience,
            IssuerSigningKey = signingKey
        };
    });
builder.Services.AddAuthorization();
builder.Services.AddHttpContextAccessor();

builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
builder.Services.Configure<ResourcesConfig>(builder.Configuration.GetSection(nameof(ResourcesConfig)));
builder.Services.AddScoped<IUserService, UserService>();
builder.Services.AddScoped<IResourcesService, ResourcesService>();

builder.Services.AddSingleton<IDbFactory, DbFactory>(sp => new DbFactory(sp.GetService<IOptions<ConnectionStrings>>()!.Value.AzaionDb));

builder.Services.AddValidatorsFromAssemblyContaining<RegisterUserValidator>();


var app = builder.Build();

if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

app.UseHttpsRedirection();
app.UseAuthentication();
app.UseAuthorization();

app.MapPost("/login",
    async (string username, string password, IUserService userService, CancellationToken cancellationToken) =>
    {
        var user = await userService.ValidateUser(username, password);

        var tokenHandler = new JwtSecurityTokenHandler();
        var tokenDescriptor = new SecurityTokenDescriptor
        {
            Subject = new ClaimsIdentity([
                new Claim(ClaimTypes.NameIdentifier, user.Id),
                new Claim(ClaimTypes.Name, user.Email),
                new Claim(ClaimTypes.Role, user.Role.ToString()),
                new Claim(Constants.HARDWARE_ID, user.HardwareId)
            ]),
            Expires = DateTime.UtcNow.AddHours(2),
            Issuer = jwtConfig.Issuer,
            Audience = jwtConfig.Audience,
            SigningCredentials = new SigningCredentials(signingKey, SecurityAlgorithms.HmacSha256Signature)
        };

        var token = tokenHandler.CreateToken(tokenDescriptor);
        var tokenString = tokenHandler.WriteToken(token);

        return Results.Ok(new { Token = tokenString });
    });

app.MapPost("/register-user",
    async (RegisterUserRequest registerUserRequest, IUserService userService, CancellationToken cancellationToken)
        => await userService.RegisterUser(registerUserRequest, cancellationToken))
    .RequireAuthorization(p => p.RequireRole(RoleEnum.ApiAdmin.ToString()));

app.MapPost("/resources",
    async (UploadResourceRequest uploadResourceRequest, IResourcesService resourceService, CancellationToken cancellationToken)
        => await resourceService.SaveResource(uploadResourceRequest, cancellationToken))
    .RequireAuthorization(p => p.RequireRole(RoleEnum.ApiAdmin.ToString()));

app.MapPost("/resources/get",
    async (GetResourceRequest request, IUserService userService, IResourcesService resourcesService, CancellationToken cancellationToken) =>
    {
        var user = userService.CurrentUser;
        if (user == null)
            throw new BusinessException(ExceptionEnum.NoUser, "No current user");
        if (string.IsNullOrEmpty(user.HardwareId))
            await userService.UpdateHardwareId(user.Email, request.HardwareId);
        var ms = new MemoryStream();
        var key = Security.MakeEncryptionKey(user.Email, request.Password);
        await resourcesService.GetEncryptedResource(request.ResourceEnum, key, ms, cancellationToken);
        return ms;
    }).RequireAuthorization();

app.Run();