using Password_Manager;
using Microsoft.VisualBasic.FileIO;

namespace Profiles
{
    static class ProfileHandler
    {
        public static Profile CurrentProfile;
        public static ProfileList ListOfProfiles;
        private static string filePath = SpecialDirectories.CurrentUserApplicationData + "\\Profiles.csv";

        public static void AddProfile(string profileName, string profilePath)
        {
            ListOfProfiles.Add(new Profile(profileName, profilePath));
            ChangeProfiles(profileName);
        }

        public static void ChangeProfiles(string profileName)
        {
            try
            {
                CurrentProfile = ListOfProfiles.SearchByName(profileName);
            } catch (ProfileNotFoundException)
            {
                MessageBox.Show("The selected profile cannot be found", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        public static void Init()
        {
            ListOfProfiles = new ProfileList();

            if (File.Exists(filePath))
            {
                LoadProfilesFile();
            }
            else
            {
                CreateProfilesFile();
            }
        }
        private static void LoadProfilesFile()
        {
            try
            {
                StreamReader sr = new StreamReader(filePath);
                string[] lines = sr.ReadToEnd().Split("\n");
                foreach (string line in lines)
                {
                    string[] fields = line.Split(',');
                    try
                    {
                        ListOfProfiles.Add(new Profile(fields[0], fields[1]));
                    } catch (IndexOutOfRangeException)
                    {
                        //File is messed up, creating new one
                        sr.Close();
                        CreateProfilesFile();
                        break;
                    }
                }
                sr.Close();
            } catch (IOException e)
            {
                MessageBox.Show(e.ToString(), "IO Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private static void TrimLastLine()
        {
            try
            {
                StreamReader sr = new StreamReader(filePath);
                List<string> validLines = new List<string>();

                while (!sr.EndOfStream)
                {
                    string? line = sr.ReadLine();
                    if (line != null)
                    {
                        validLines.Add(line);
                    }
                }

                sr.Close();
                File.WriteAllLines(filePath, validLines);
            } catch (IOException e)
            {
                MessageBox.Show(e.ToString(), "IO Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            } catch (UnauthorizedAccessException e)
            {
                MessageBox.Show(e.ToString(), "Can't access profiles file", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        public static void SaveProfiles()
        {
            try
            {
                StreamWriter sw = new StreamWriter(filePath);

                foreach (Profile p in ListOfProfiles)
                {
                    sw.WriteLine($"{p.Name},{p.Path}");
                }

                sw.Close();
            } catch (IOException e)
            {
                MessageBox.Show(e.ToString(), "IO Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            } catch (UnauthorizedAccessException e)
            {
                MessageBox.Show(e.ToString(), "Can't access profiles file", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private static void CreateProfilesFile()
        {
            try
            {
                StreamWriter sw = new StreamWriter(filePath);

                string[] parameters = new string[2];

                NewProfileForm np = new NewProfileForm();
                np.NewProfileRequest += (string profileName, string profilePath) =>
                {
                    Profile firstProfile = new Profile(profileName, profilePath);
                    ListOfProfiles.Add(firstProfile);
                    ChangeProfiles(firstProfile.Name);
                    sw.WriteLine($"{firstProfile.Name},{firstProfile.Path}");
                    sw.Close();
                    TrimLastLine();
                };
                np.ShowDialog();
            } catch (IOException e)
            {
                MessageBox.Show(e.ToString(), "IO Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
    }
}