@inherits LocalizableComponentBase

@* Asks before an act that takes words or a password: what it does, then the fields it needs, then a confirm button. The
   staff's acts (Staff) take a note only the staff read (data-moderate-note), a warning the persona is told
   (data-moderate-warning) and, to delete, the administrator's own password (data-admin-password); the dialog is
   data-moderate-confirm="{act}". A login's own deletions take its password (data-own-password) in data-own-confirm="{act}".
   OnConfirm does the act: a failure stays in the dialog (a wrong password is typed again), a success closes it. *@
<DModal Placement="DModalPlacement.ResponsiveBottom" IsOpen="true" IsOpenChanged="Closed" CloseText="@Localizer["Close"]"
		data-moderate-confirm="@(Staff ? Act : null)" data-own-confirm="@(Staff ? null : Act)">
	<Heading>@Question</Heading>
	<ChildContent>
		<div class="flex flex-col gap-3 mt-2 text-sm">
			@if (Text is { Length: > 0 })
			{
				<p class="whitespace-pre-line">@Text</p>
			}
			@if (AskNote)
			{
				<label class="flex flex-col gap-1">
					<span class="font-semibold">@Localizer["A note for the staff (optional)"]</span>
					<DTextarea TValue="string" class="w-full" @bind-Value="note" Immediate="true" rows="2" autocomplete="off" maxlength="1000"
							   aria-label="@Localizer["A note for the staff (optional)"]" data-moderate-note />
					<span class="text-xs opacity-70">@Localizer["Only the staff read it, in the moderation log."]</span>
				</label>
			}
			@if (AskWarning)
			{
				<label class="flex flex-col gap-1">
					<span class="font-semibold">@Localizer["What the persona is told (optional)"]</span>
					<DTextarea TValue="string" class="w-full" @bind-Value="warning" Immediate="true" rows="3" autocomplete="off" maxlength="1000"
							   aria-label="@Localizer["What the persona is told (optional)"]" data-moderate-warning />
					<span class="text-xs opacity-70">@(WarningHint ?? Localizer["It reaches the persona as a warning from this server's staff."])</span>
				</label>
			}
			@if (AskPassword)
			{
				<DInput TValue="string" Type="password" class="w-full" @bind-Value="password" Immediate="true" autocomplete="current-password" maxlength="200"
						placeholder="@(Staff ? Localizer["Your password"] : Localizer["Current password"])"
						aria-label="@(Staff ? Localizer["Your password"] : Localizer["Current password"])"
						data-admin-password="@(Staff ? "" : null)" data-own-password="@(Staff ? null : "")" />
			}
			<ErrorViewer AdditionalError="@error" />
		</div>
	</ChildContent>
	<Actions>
		<DButton class="max-md:flex-1" OnClick="Cancel" data-act-cancel>@Localizer["Cancel"]</DButton>
		<DButton class="max-md:flex-1" Color="@(Danger ? DColor.Error : DColor.Primary)"
				 Disabled="@(IsDefaultDisabled || isActing || (AskPassword && string.IsNullOrEmpty(password)))" OnClick="Confirm" data-act-submit>
			@if (isActing)
			{
				<DLoading Size="DSize.Sm" LabelText="@Localizer["loading"]" />
			}
			<span>@ConfirmText</span>
		</DButton>
	</Actions>
</DModal>

@code {
	/// <summary>The question the dialog asks, its heading.</summary>
	[Parameter, EditorRequired] public string Question { get; set; }
	/// <summary>What the act does, in words.</summary>
	[Parameter] public string Text { get; set; }
	[Parameter, EditorRequired] public string ConfirmText { get; set; }
	/// <summary>The confirm button shows as a danger (it deletes or cuts something off).</summary>
	[Parameter] public bool Danger { get; set; }
	/// <summary>The act's name in the dialog's data attribute (silence, persona-delete, ...).</summary>
	[Parameter, EditorRequired] public string Act { get; set; }
	/// <summary>A staff act (data-moderate-confirm, the administrator's password) or the login's own (data-own-confirm).</summary>
	[Parameter] public bool Staff { get; set; }
	[Parameter] public bool AskNote { get; set; }
	[Parameter] public bool AskWarning { get; set; }
	/// <summary>Who reads the warning, when it isn't simply the persona (an account elsewhere is told nothing).</summary>
	[Parameter] public string WarningHint { get; set; }
	[Parameter] public bool AskPassword { get; set; }
	/// <summary>Does the act with what was typed; an invalid result stays in the dialog, a valid one closes it.</summary>
	[Parameter, EditorRequired] public Func<Answer, Task<WebResult>> OnConfirm { get; set; }
	[Parameter] public EventCallback OnClosed { get; set; }

	/// <summary>What was typed: the note and the warning trimmed, null when empty; the password as typed.</summary>
	public sealed record Answer(string Note, string Warning, string Password);

	string note;
	string warning;
	string password;
	string error;
	bool isActing;

	protected override void OnInitialized() => IsLoading = false;

	async Task Confirm()
	{
		error = default;
		isActing = true;
		var result = await OnConfirm(new Answer(Trimmed(note), Trimmed(warning), password));
		isActing = false;
		if (result.IsInvalid)
		{
			// a cancelled request says nothing; anything else is said here, where it can be fixed
			if (result.StatusCode is not 410)
				error = result.ErrorMessage;
			password = default;
			return;
		}

		await OnClosed.InvokeAsync();
	}

	static string Trimmed(string text) => string.IsNullOrWhiteSpace(text) ? null : text.Trim();

	Task Cancel() => OnClosed.InvokeAsync();

	Task Closed(bool open) => open ? Task.CompletedTask : OnClosed.InvokeAsync();
}