using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;

#if UNITY_EDITOR
using System.Security.Cryptography;
using System.Text;
#endif

using UnityEngine;

//Profile数据管理，一般是一些String数据，通过ClientPrefs进行本地保存
public class ProfileManager
{
    public const string AuthProfileCommandLineArg = "-AuthProfile";

    string m_Profile;

    public string Profile
    {
        get
        {
            return m_Profile ??= GetProfile();
        }
        set
        {
            m_Profile = value;
            onProfileChanged?.Invoke();
        }
    }

    public event Action onProfileChanged;

    List<string> m_AvailableProfiles;

    public ReadOnlyCollection<string> AvailableProfiles
    {
        get
        {
            if(m_AvailableProfiles == null)
            {
                LoadProfiles();
            }

            return m_AvailableProfiles.AsReadOnly();
        }
    }

    public void CreateProfile(string profile)
    {
        m_AvailableProfiles.Add(profile);
        SaveProfiles();
    }

    public void DeleteProfile(string profile)
    {
        m_AvailableProfiles.Remove(profile);
        SaveProfiles();
    }

    static string GetProfile()
    {
        var arguments = Environment.GetCommandLineArgs();
        for(int i = 0;i < arguments.Length;i++)
        {
            if(arguments[i] == AuthProfileCommandLineArg)
            {
                var profileId = arguments[i + 1];
                return profileId;
            }
        }

#if UNITY_EDITOR
        var hashedBytes = new MD5CryptoServiceProvider().ComputeHash(Encoding.UTF8.GetBytes(Application.dataPath));

        Array.Resize(ref hashedBytes, 16);

        return new Guid(hashedBytes).ToString("N");
#else
            return "";
#endif
    }

    void LoadProfiles()
    {
        m_AvailableProfiles = new List<string>();
        var loadedProfiles = ClientPrefs.GetAvailableProfiles();
        foreach(var profile in loadedProfiles.Split(','))
        {
            if(profile.Length > 0)
            {
                m_AvailableProfiles.Add(profile);
            }
        }
    }

    void SaveProfiles()
    {
        var profilesToSave = "";
        foreach(var profile in m_AvailableProfiles)
        {
            profilesToSave += profile + ",";
        }
        ClientPrefs.SetAvailableProfiles(profilesToSave);
    }
}