@using LucideBlazor
@using Moonlight.Shared.Shared
@using MoonlightServers.Shared
@using MoonlightServers.Shared.Admin.Templates
@using ShadcnBlazor.DataGrids
@using ShadcnBlazor.Buttons
@using ShadcnBlazor.Dropdowns
@using ShadcnBlazor.Extras.AlertDialogs
@using ShadcnBlazor.Extras.Toasts
@using ShadcnBlazor.Tabels

@inject HttpClient HttpClient
@inject AlertDialogService AlertDialogService
@inject ToastService ToastService
@inject NavigationManager NavigationManager
@inject IAuthorizationService AuthorizationService

<InputFile OnChange="OnFileSelectedAsync" id="import-template" class="hidden" multiple accept=".yml,.yaml,.json"/>

<div class="flex flex-row justify-between mt-5">
    <div class="flex flex-col">
        <h1 class="text-xl font-semibold">Templates</h1>
        <div class="text-muted-foreground">
            Manage templates
        </div>
    </div>
    <div class="flex flex-row gap-x-1.5">
        <Button Variant="ButtonVariant.Outline">
            <Slot>
                <label for="import-template" @attributes="context">
                    <HardDriveUploadIcon/>
                    Import
                </label>
            </Slot>
        </Button>
        <Button>
            <Slot Context="buttonCtx">
                <a @attributes="buttonCtx" href="/admin/servers/templates/create"
                   data-disabled="@(!CreateAccess.Succeeded)">
                    <PlusIcon/>
                    Create
                </a>
            </Slot>
        </Button>
    </div>
</div>

<div class="mt-3">
    <DataGrid @ref="Grid" TGridItem="TemplateDto" Loader="LoadAsync" PageSize="10" ClassName="bg-card">
        <PropertyColumn Field="u => u.Id"/>
        <TemplateColumn IsFilterable="true" Identifier="@nameof(TemplateDto.Name)" Title="@nameof(TemplateDto.Name)">
            <CellTemplate>
                <TableCell>
                    <a class="text-primary" href="#"
                       @onclick="() => Edit(context)" @onclick:preventDefault>
                        @context.Name
                    </a>
                </TableCell>
            </CellTemplate>
        </TemplateColumn>
        <TemplateColumn Title="@nameof(TemplateDto.Description)" HeadClassName="hidden lg:table-cell">
            <CellTemplate>
                <TableCell ClassName="hidden lg:table-cell">
                    <div class="truncate max-w-md">@context.Description</div>
                </TableCell>
            </CellTemplate>
        </TemplateColumn>
        <PropertyColumn Field="u => u.Author"
                        HeadClassName="hidden xl:table-cell"
                        CellClassName="hidden xl:table-cell"/>
        <PropertyColumn Field="u => u.Version"
                        HeadClassName="hidden xl:table-cell"
                        CellClassName="hidden xl:table-cell"/>
        <TemplateColumn>
            <CellTemplate>
                <TableCell>
                    <div class="flex flex-row items-center justify-end me-3">
                        <DropdownMenu>
                            <DropdownMenuTrigger>
                                <Slot Context="dropdownSlot">
                                    <Button Size="ButtonSize.IconSm" Variant="ButtonVariant.Ghost"
                                            @attributes="dropdownSlot">
                                        <EllipsisIcon/>
                                    </Button>
                                </Slot>
                            </DropdownMenuTrigger>
                            <DropdownMenuContent SideOffset="2">
                                <DropdownMenuItem OnClick="() => Export(context)">
                                    Export
                                    <DropdownMenuShortcut>
                                        <HardDriveDownloadIcon/>
                                    </DropdownMenuShortcut>
                                </DropdownMenuItem>
                                <DropdownMenuItem OnClick="() => Edit(context)"
                                                  Disabled="@(!EditAccess.Succeeded)">
                                    Edit
                                    <DropdownMenuShortcut>
                                        <PenIcon/>
                                    </DropdownMenuShortcut>
                                </DropdownMenuItem>
                                <DropdownMenuItem OnClick="() => DeleteAsync(context)"
                                                  Variant="DropdownMenuItemVariant.Destructive"
                                                  Disabled="@(!DeleteAccess.Succeeded)">
                                    Delete
                                    <DropdownMenuShortcut>
                                        <TrashIcon/>
                                    </DropdownMenuShortcut>
                                </DropdownMenuItem>
                            </DropdownMenuContent>
                        </DropdownMenu>
                    </div>
                </TableCell>
            </CellTemplate>
        </TemplateColumn>
    </DataGrid>
</div>

@code
{
    [CascadingParameter] public Task<AuthenticationState> AuthState { get; set; }

    private DataGrid<TemplateDto> Grid;

    private AuthorizationResult EditAccess;
    private AuthorizationResult DeleteAccess;
    private AuthorizationResult CreateAccess;

    protected override async Task OnInitializedAsync()
    {
        var authState = await AuthState;

        EditAccess = await AuthorizationService.AuthorizeAsync(authState.User, Permissions.Templates.Edit);
        DeleteAccess = await AuthorizationService.AuthorizeAsync(authState.User, Permissions.Templates.Delete);
        CreateAccess = await AuthorizationService.AuthorizeAsync(authState.User, Permissions.Templates.Create);
    }

    private async Task<DataGridResponse<TemplateDto>> LoadAsync(DataGridRequest<TemplateDto> request)
    {
        var query = $"?startIndex={request.StartIndex}&length={request.Length}";
        var filterOptions = request.Filters.Count > 0 ? new FilterOptions(request.Filters) : null;

        var response = await HttpClient.GetFromJsonAsync<PagedData<TemplateDto>>(
            $"api/admin/servers/templates{query}&filterOptions={filterOptions}",
            SerializationContext.Default.Options
        );

        return new DataGridResponse<TemplateDto>(response!.Data, response.TotalLength);
    }

    private void Edit(TemplateDto context) => NavigationManager.NavigateTo($"/admin/servers/templates/{context.Id}");

    private void Export(TemplateDto dto) => NavigationManager.NavigateTo($"api/admin/servers/templates/{dto.Id}/export", true);

    private async Task DeleteAsync(TemplateDto context)
    {
        await AlertDialogService.ConfirmDangerAsync(
            "Template Deletion",
            $"Do you really want to delete the template {context.Name}? This cannot be undone.",
            async () =>
            {
                var response = await HttpClient.DeleteAsync($"api/admin/servers/templates/{context.Id}");
                response.EnsureSuccessStatusCode();

                await Grid.RefreshAsync();
                
                await ToastService.SuccessAsync(
                    "Template Deletion",
                    $"Successfully deleted template {context.Name}"
                );

            }
        );
    }
    
    private async Task OnFileSelectedAsync(InputFileChangeEventArgs eventArgs)
    {
        var files = eventArgs.GetMultipleFiles();

        foreach (var browserFile in files)
        {
            await using var contentStream = browserFile.OpenReadStream(browserFile.Size);

            var response = await HttpClient.PostAsync(
                "api/admin/servers/templates/import",
                new StreamContent(contentStream)
            );

            response.EnsureSuccessStatusCode();

            var importedTemplate = await response
                .Content
                .ReadFromJsonAsync<TemplateDto>(SerializationContext.Default.Options);

            if (importedTemplate == null)
                continue;

            await Grid.RefreshAsync();
            await ToastService.SuccessAsync("Template Import", $"Successfully imported template {importedTemplate.Name}");
        }
    }
}