using OwnChar.Api.Exceptions;
using OwnChar.Client.Data;
using OwnChar.Client.Data.Model;
using OwnChar.Client.Managers;
using Pilz.Cryptography;
using System.Diagnostics.CodeAnalysis;

namespace OwnChar.Client;

internal class OwnCharManager : IOwnCharManager
{
    // User
    public bool IsLoggedIn => Api is not null && Api.IsLoggedIn;

    // Data Provider
    public OwnCharApiClient? Api { get; private set; }

    // Manager
    public IUserManager Users { get; }
    public IGroupsManager Groups { get; }
    public ICharacterManager Characters { get; }

    public OwnCharManager()
    {
        Users = new UserManager(this);
        Groups = new GroupsManager(this);
        Characters = new CharacterManager(this);
    }

    [MemberNotNull(nameof(Api))]
    internal protected void CheckLogin()
    {
        if (!IsLoggedIn)
            throw new LoginException("You are already logged in!");
    }

    /// <summary>
    /// Tries to login on the given data provider.
    /// </summary>
    /// <returns>Returns <see cref="true"/> if the login was successfull and <see cref="false"/> if not.</returns>
    public Task<UserProfile?> Login(string? username, SecureString? password)
    {
        ArgumentNullException.ThrowIfNull(Api, nameof(Api));
        ArgumentException.ThrowIfNullOrWhiteSpace(username, nameof(username));
        ArgumentException.ThrowIfNullOrWhiteSpace(password, nameof(password));

        username = username.Trim().ToLower();

        return Api.Auth.Login(username, OwnCharUtils.HashPassword(username, password));
    }

    /// <summary>
    /// Closes the session on the current data provider.
    /// </summary>
    /// <returns></returns>
    public async Task<bool> Logout()
    {
        if (Api is null)
            return true;
        return await Api.Auth.Logout();
    }
}