@inject ISnackbar snackbar
@inject IMRBService mrbService
@inject MesaFabApprovalAuthStateProvider authStateProvider

<MudDialog>
    <DialogContent>
        <MudPaper Class="p-2">
            <MudForm @bind-Errors="@errors">
                <MudTextField T="string"
                    Label="Comments"
                    Required="true"
                    RequiredError="You must provide a comment"
                    @bind-Value="@comments"
                    @bind-Text="@comments"
                    Immediate="true"
                    AutoGrow
                    AutoFocus/>
                <MudFileUpload T="IReadOnlyList<IBrowserFile>" OnFilesChanged="AddAttachments">
                    <ActivatorContent>
                        <MudButton Variant="Variant.Filled"
                                   Color="Color.Tertiary"
                                   style="margin: auto;"
                                   StartIcon="@Icons.Material.Filled.AttachFile">
                            @if (attachmentUploadInProcess) {
                                <MudProgressCircular Class="m-1" Size="Size.Small" Indeterminate="true" />
                                <MudText>Processing</MudText>
                            } else {
                                <MudText>Upload Supporting Document</MudText>
                            }
                        </MudButton>
                    </ActivatorContent>
                </MudFileUpload>
            </MudForm>
        </MudPaper>
    </DialogContent>
    <DialogActions>
        <MudButton Variant="Variant.Filled"
                   Color="Color.Tertiary"
                   Class="m1-auto"
                   OnClick=SubmitComments>
            @if (processing) {
                <MudProgressCircular Class="m-1" Size="Size.Small" Indeterminate="true" />
                <MudText>Processing</MudText>
            } else {
                <MudText>Ok</MudText>
            }
        </MudButton>
        <MudButton Variant="Variant.Filled"
                   Class="grey text-black m1-auto"
                   OnClick=Cancel>
            Cancel
        </MudButton>
    </DialogActions>
</MudDialog>

@code {
    [CascadingParameter] MudDialogInstance MudDialog { get; set; }

    [Parameter]
    public string comments { get; set; } = "";

    [Parameter]
    public int actionId { get; set; } = 0;

    private string[] errors = { };

    private bool processing = false;
    private bool attachmentUploadInProcess = false;

    protected override void OnParametersSet() {
        comments = string.Empty;
    }

    private void SubmitComments() {
        processing = true;
        try {
            if (string.IsNullOrWhiteSpace(comments) || comments.Length < 5)
                throw new Exception("Comments must be at least five characters long");

            MudDialog.Close(DialogResult.Ok(comments));
        } catch (Exception ex) {
            snackbar.Add(ex.Message, Severity.Error);
        }
        processing = false;
    }

    private void Cancel() {
        MudDialog.Close(DialogResult.Cancel());
    }

    private async Task AddAttachments(InputFileChangeEventArgs args) {
        attachmentUploadInProcess = true;
        try {
            if (actionId <= 0)
                throw new Exception($"{actionId} is not a valid MRB action ID");

            IReadOnlyList<IBrowserFile> attachments = args.GetMultipleFiles();

            if (authStateProvider.CurrentUser is not null) {
                await mrbService.UploadActionAttachments(attachments, actionId);

                await mrbService.GetAllActionAttachmentsForMRB(actionId, true);

                attachmentUploadInProcess = false;

                snackbar.Add("Attachments successfully uploaded", Severity.Success);

                StateHasChanged();
            }
        } catch (Exception ex) {
            attachmentUploadInProcess = false;
            snackbar.Add($"Unable to upload attachments, because {ex.Message}", Severity.Error);
        }
    }
}