@rendermode InteractiveServer

@using BlazorStrap
@using BlazorStrap.Shared.Components.Modal
@using static Microsoft.AspNetCore.Components.Web.RenderMode
@using BlazorStrap.V5
@using CurrieTechnologies.Razor.SweetAlert2
@using HopFrame.Database.Models
@using HopFrame.Security.Claims
@using HopFrame.Security.Services
@using HopFrame.Web.Model
@using HopFrame.Web.Services

<BSModal DataId="edit-user-modal" HideOnValidSubmit="true" IsStaticBackdrop="true" @ref="_modal">
    <BSForm Model="_user" OnValidSubmit="EditUser">
        <BSModalHeader>Edit @_user.Username</BSModalHeader>
        <BSModalContent>
            <div class="mb-3">
                <BSLabel>User id</BSLabel>
                <input type="text" class="form-control" disabled value="@_user.Id"/>
            </div>
            <div class="mb-3">
                <BSLabel>Created at</BSLabel>
                <input type="text" class="form-control" disabled value="@_user.CreatedAt"/>
            </div>
            <div class="mb-3">
                <BSLabel>E-Mail</BSLabel>
                <BSInput InputType="InputType.Email" @bind-Value="_user.Email" />
            </div>
            <div class="mb-3">
                <BSLabel>Username</BSLabel>
                <BSInput InputType="InputType.Text" @bind-Value="_user.Username" />
            </div>
            <div class="mb-3">
                <BSLabel>Password</BSLabel>
                <BSInput InputType="InputType.Password" @bind-Value="_newPassword" />
            </div>
            
            <div class="mb-3">
                <BSLabel>Groups</BSLabel>
                <BSListGroup>
                    <BSListGroupItem>
                        <BSListGroup IsFlush="true">
                            @foreach (var group in _userGroups) {
                                <BSListGroupItem>
                                    <BSButton Color="BSColor.Danger" Size="Size.ExtraSmall" MarginEnd="Margins.Small" OnClick="() => RemoveGroup(group)">
                                        <HopIconDisplay Type="HopIconDisplay.HopIcon.Cross"/>
                                    </BSButton>

                                    <span>@group.Name.Replace("group.", "")</span>
                                </BSListGroupItem>
                            }
                        </BSListGroup>
                    </BSListGroupItem>
                    <BSListGroupItem>
                        <div style="display: flex; gap: 20px">
                            <BSInput InputType="InputType.Select" @bind-Value="_selectedGroup">
                                <option selected>Select group</option>

                                @foreach (var group in _allGroups) {
                                    @if (_userGroups.All(g => g.Name != group.Name)) {
                                        <option value="@group.Name">@group.Name.Replace("group.", "")</option>
                                    }
                                }
                            </BSInput>
                            <BSButton Color="BSColor.Secondary" OnClick="AddGroup">Add</BSButton>
                        </div>
                    </BSListGroupItem>
                </BSListGroup>
            </div>
            
            <div class="mb-3">
                <BSLabel>Permissions</BSLabel>
                <BSListGroup>
                    <BSListGroupItem>
                        <BSListGroup IsFlush="true">
                            @foreach (var perm in _user.Permissions.Where(perm => !perm.PermissionName.StartsWith("group."))) {
                                <BSListGroupItem>
                                    <BSButton Color="BSColor.Danger" Size="Size.ExtraSmall" MarginEnd="Margins.Small" OnClick="() => RemovePermission(perm)">
                                        <HopIconDisplay Type="HopIconDisplay.HopIcon.Cross"/>
                                    </BSButton>

                                    <span>@perm.PermissionName</span>
                                </BSListGroupItem>
                            }
                        </BSListGroup>
                    </BSListGroupItem>
                    <BSListGroupItem>
                        <div style="display: flex; gap: 20px">
                            <BSInput InputType="InputType.Text" @bind-Value="_permissionToAdd"/>
                            <BSButton Color="BSColor.Secondary" OnClick="AddPermission">Add</BSButton>
                        </div>
                    </BSListGroupItem>
                </BSListGroup>
            </div>
        </BSModalContent>
        <BSModalFooter>
            <BSButton Target="edit-user-modal">Cancel</BSButton>
            <BSButton IsSubmit="true" Color="BSColor.Primary">Save</BSButton>
        </BSModalFooter>
    </BSForm>
</BSModal>

@inject IUserService Users
@inject IPermissionService Permissions
@inject SweetAlertService Alerts
@inject ITokenContext Auth

@code {
    [Parameter] public Func<Task> ReloadPage { get; set; }

    private BSModalBase _modal;
    private User _user;
    private string _newPassword;

    private IList<PermissionGroup> _userGroups;
    private IList<PermissionGroup> _allGroups;
    private string _selectedGroup;
    private string _permissionToAdd;

    public async Task ShowAsync(User user) {
        if (!(await Permissions.HasPermission(AdminPermissions.EditUsers, Auth.User.Id))) {
            await NoEditPermissions();
            return;
        }
        
        _user = user;
        _userGroups = await Permissions.GetUserPermissionGroups(_user);
        _allGroups = await Permissions.GetPermissionGroups();
        await _modal.ShowAsync();
    }

    private async Task AddGroup() {
        if (!(await Permissions.HasPermission(AdminPermissions.EditUsers, Auth.User.Id))) {
            await NoEditPermissions();
            return;
        }
        
        if (string.IsNullOrWhiteSpace(_selectedGroup)) {
            await Alerts.FireAsync(new SweetAlertOptions {
                Title = "Select a group!",
                Icon = SweetAlertIcon.Error,
                ShowConfirmButton = true
            });
            return;
        }

        var group = _allGroups.SingleOrDefault(group => group.Name == _selectedGroup);

        await Permissions.AddPermission(_user, group?.Name);
        _userGroups.Add(group);

        await Alerts.FireAsync(new SweetAlertOptions {
            Title = "Group added!",
            Icon = SweetAlertIcon.Success,
            Timer = 1500,
            ShowConfirmButton = false
        });
    }
    
    private async Task RemoveGroup(PermissionGroup group) {
        if (!(await Permissions.HasPermission(AdminPermissions.EditUsers, Auth.User.Id))) {
            await NoEditPermissions();
            return;
        }
        
        var result = await Alerts.FireAsync(new SweetAlertOptions {
            Title = "Are you sure?",
            Icon = SweetAlertIcon.Warning,
            ConfirmButtonText = "Yes",
            ShowCancelButton = true,
            ShowConfirmButton = true
        });

        if (result.IsConfirmed) {
            await Permissions.RemoveGroupFromUser(_user, group);
            _userGroups.Remove(group);
            StateHasChanged();

            await Alerts.FireAsync(new SweetAlertOptions {
                Title = "Group removed!",
                Icon = SweetAlertIcon.Success,
                Timer = 1500,
                ShowConfirmButton = false
            });
        }
    }

    private async Task AddPermission() {
        if (!(await Permissions.HasPermission(AdminPermissions.EditUsers, Auth.User.Id))) {
            await NoEditPermissions();
            return;
        }
        
        if (string.IsNullOrWhiteSpace(_permissionToAdd)) {
            await Alerts.FireAsync(new SweetAlertOptions {
                Title = "Enter a permission name!",
                Icon = SweetAlertIcon.Error,
                ShowConfirmButton = true
            });
            return;
        }

        await Permissions.AddPermission(_user, _permissionToAdd);
        _user.Permissions.Add(await Permissions.GetPermission(_permissionToAdd, _user));
        _permissionToAdd = "";

        await Alerts.FireAsync(new SweetAlertOptions {
            Title = "Permission added!",
            Icon = SweetAlertIcon.Success,
            Timer = 1500,
            ShowConfirmButton = false
        });
    }
    
    private async Task RemovePermission(Permission perm) {
        if (!(await Permissions.HasPermission(AdminPermissions.EditUsers, Auth.User.Id))) {
            await NoEditPermissions();
            return;
        }
        
        var result = await Alerts.FireAsync(new SweetAlertOptions {
            Title = "Are you sure?",
            Icon = SweetAlertIcon.Warning,
            ConfirmButtonText = "Yes",
            ShowCancelButton = true,
            ShowConfirmButton = true
        });

        if (result.IsConfirmed) {
            await Permissions.RemovePermission(perm);
            _user.Permissions.Remove(perm);
            StateHasChanged();

            await Alerts.FireAsync(new SweetAlertOptions {
                Title = "Permission removed!",
                Icon = SweetAlertIcon.Success,
                Timer = 1500,
                ShowConfirmButton = false
            });
        }
    }
    
    private async void EditUser() {
        if (!(await Permissions.HasPermission(AdminPermissions.EditUsers, Auth.User.Id))) {
            await NoEditPermissions();
            return;
        }
        
        string errorMessage = null;
        var validator = new RegisterData {
            Password = _newPassword,
            Email = _user.Email
        };
        
        var allUsers = await Users.GetUsers();
        
        if (allUsers.Any(user => user.Username == _user.Username && user.Id != _user.Id)) {
            errorMessage = "Username is already taken!";
        }
        else if (allUsers.Any(user => user.Email == _user.Email && user.Id != _user.Id)) {
            errorMessage = "E-Mail is already taken!";
        }
        else if (!string.IsNullOrWhiteSpace(_newPassword) && !validator.PasswordIsValid) {
            errorMessage = "The password needs to be at least 8 characters long!";
        }
        else if (!validator.EmailIsValid) {
            errorMessage = "Invalid E-Mail address!";
        }

        if (!string.IsNullOrWhiteSpace(errorMessage)) {
            await Alerts.FireAsync(new SweetAlertOptions {
                Title = "Something went wrong!",
                Text = errorMessage,
                Icon = SweetAlertIcon.Error,
                ShowConfirmButton = false,
                Timer = 1500
            });
            
            return;
        }

        await Users.UpdateUser(_user);

        if (!string.IsNullOrWhiteSpace(_newPassword)) {
            await Users.ChangePassword(_user, _newPassword);
        }

        if (ReloadPage is not null)
            await ReloadPage.Invoke();
        
        await Alerts.FireAsync(new SweetAlertOptions {
            Title = "User edited!",
            Icon = SweetAlertIcon.Success,
            Timer = 1500,
            ShowConfirmButton = false
        });
    }

    private async Task NoEditPermissions() {
        await Alerts.FireAsync(new SweetAlertOptions {
            Title = "Unauthorized!",
            Text = "You don't have the required Permissions to edit a user!",
            Icon = SweetAlertIcon.Error
        });
    }
}