using Backend.Model.Relations;

namespace Backend.Database;

public partial class Db
{
    public void CreateFakeRelations()
    {
        _Db.RunInTransaction(() =>
        {
            CreateFakeUserTree();
            CreateFakeFolderTree();
            LinkFakeInstallationsToFolders();
            GiveFakeUsersAccessToFolders();
            GiveFakeUsersAccessToInstallations();
        });
    }

    private void CreateFakeUserTree()
    {
        foreach (var userId in Enumerable.Range(1, NbUsers))
        {
            var user = GetUserById(userId);
            if (user is null)
                continue;

            user.ParentId = userId > 1
                          ? Random.Shared.Next(userId - 1) + 1
                          : 0;  // root has parentId 0

            Update(user);
        }
    }

    private void CreateFakeFolderTree()
    {
        foreach (var folderId in Enumerable.Range(1, NbFolders))
        {
            var folder = GetFolderById(folderId);
            if (folder is null)
                continue;

            folder.ParentId = folderId > 1
                            ? Random.Shared.Next(folderId - 1) + 1
                            : 0;   // root has parentId 0

            Update(folder);
        }
    }

    private void LinkFakeInstallationsToFolders()
    {
        var nFolders = NbFolders;

        foreach (var installation in Installations)
        {
            installation.ParentId = Random.Shared.Next(nFolders) + 1;
            Update(installation);
        }
    }

    private void GiveFakeUsersAccessToFolders()
    {
        foreach (var uf in User2Folder) // remove existing relations
            _Db.Delete(uf);

        var nFolders = NbFolders;

        foreach (var user in Users)
            while (Random.Shared.Next(5) != 0)
            {
                var relation = new User2Folder
                {
                    UserId = user.Id,
                    FolderId = Random.Shared.Next(nFolders) + 1
                };
                _Db.Insert(relation);
            }
    }

    private void GiveFakeUsersAccessToInstallations()
    {
        foreach (var ui in User2Installation) // remove existing relations
            _Db.Delete(ui);

        var nbInstallations = NbInstallations;

        foreach (var user in Users)
            while (Random.Shared.Next(5) != 0)
            {
                var relation = new User2Installation
                {
                    UserId = user.Id,
                    InstallationId = Random.Shared.Next(nbInstallations) + 1
                };
                _Db.Insert(relation);
            }
    }
}