@page "/account/{accountId}"
@attribute [Authorize]
@inherits LocalizableComponentBase
<Title>@(account?.Name ?? Localizer["Profile"])</Title>

@* An account as the current persona sees it (/api/v1/accounts/{id}): its header, bio and fields, its counts, what it is
   to the persona (following, followed by, requested, blocked, muted) with the actions that change it, and its posts,
   page by page, as posts only, posts and replies, or media. A remote account's profile comes from what PrivaPub knows,
   never from its server directly. *@
<section class="block relative w-full h-full neo-inset neo-xs rounded-xl">
	<div class="flex flex-col gap-4 p-4 md:p-5 w-full h-full absolute overflow-y-auto">

		<div class="flex items-center gap-2">
			<DButton Size="DSize.Sm" OnClick="Back" title="@Localizer["Back"]">
				<i class="ion-md-arrow-back"></i>
			</DButton>
			<h1 class="font-bold truncate">@Localizer["Profile"]</h1>
		</div>

		@if (IsLoading)
		{
			<p class="flex w-full items-center justify-center gap-2">
				<DLoading Variant="DLoadingVariant.Dots" LabelText="@Localizer["loading"]" />
				@Localizer["loading"]
			</p>
		}
		else if (account is null)
		{
			<p class="w-full text-center text-lg">
				<i class="ion-ios-remove-circle-outline"></i> @Localizer["This account doesn't exist."]
			</p>
		}
		else
		{
			@if (account.Moved is { } moved)
			{
				<p class="flex flex-wrap items-center gap-2 p-3 rounded-xl neo-inset neo-2xs text-sm" data-moved>
					<i class="ion-md-swap"></i>
					<span>@Localizer["{0} has moved to", account.Name]</span>
					<a class="link font-semibold" href="@($"account/{Uri.EscapeDataString(moved.Id)}")">@("@" + moved.Acct)</a>
				</p>
			}
			@* not overflow-hidden: the Lists menu hangs out of it; the header picture takes the card's top corners itself *@
			<article class="flex flex-none flex-col rounded-xl neo-raised neo-xs" data-account-id="@account.Id">
				<div class="h-28 md:h-40 bg-base-200 bg-cover bg-center rounded-t-xl" style="@HeaderStyle"></div>
				<div class="flex flex-wrap items-end gap-3 px-4 -mt-10">
					@* alt="": the name is next to it. *@
					<img alt="" class="h-20 w-20 md:h-24 md:w-24 flex-none object-cover rounded-full neo-raised neo-2xs bg-base-100"
						 src="@(account.Avatar ?? "imgs/icon-192.png")" />
					<div class="flex flex-col min-w-0 flex-1 pb-1">
						<b class="text-lg truncate">@CustomEmojis.Text(account.Name, account.Emojis)</b>
						<span class="text-sm opacity-70 truncate">@("@" + FullAcct)</span>
					</div>
					@if (!IsOwn)
					{
						<div class="flex flex-wrap gap-2 pb-1">
							@if (relationship?.FollowedBy == true)
							{
								<DBadge Size="DSize.Sm" class="self-center">@Localizer["Follows you"]</DBadge>
							}
							@if (relationship?.Blocking != true)
							{
								<DButton Size="DSize.Sm" Color="@(relationship?.Following == true || relationship?.Requested == true ? DColor.Neutral : DColor.Primary)"
										 Disabled="@(IsDefaultDisabled || isActing || relationship is null)" OnClick="ToggleFollow">
									@FollowLabel
								</DButton>
							}
							@if (relationship?.Following == true)
							{
								<DDropdown @bind-IsOpen="isListMenuOpen" Align="DDropdownAlign.End" TriggerClass="btn btn-sm" SheetOnNarrow="true"
										   ContentClass="mt-2 flex flex-col gap-2 p-3 rounded-box w-64 bg-base-100 neo-raised neo-xs z-20" title="@Localizer["Lists"]">
									<Trigger>
										<i class="ion-md-list"></i><span>@Localizer["Lists"]</span>
									</Trigger>
									<ChildContent>
										@if (allLists.Count == 0)
										{
											<p class="text-xs opacity-70">@Localizer["This persona has no list yet."]</p>
										}
										@foreach (var list in allLists)
										{
											<label class="label text-sm" data-list-id="@list.Id">
												<input type="checkbox" class="checkbox checkbox-sm" checked="@inLists.Contains(list.Id)" disabled="@(IsDefaultDisabled || isActing)"
													   @onchange="@((ChangeEventArgs e) => SetListMember(list, e.Value is true))" />
												<span class="truncate">@list.Title</span>
											</label>
										}
										<a class="btn btn-xs" href="lists"><i class="ion-md-create"></i><span>@Localizer["Manage lists"]</span></a>
									</ChildContent>
								</DDropdown>
							}
							<DButton Size="DSize.Sm" Disabled="@(IsDefaultDisabled || isActing || relationship is null)"
									 OnClick="@(() => Do(relationship?.Muting == true ? AccountAction.Unmute : AccountAction.Mute))">
								<i class="@(relationship?.Muting == true ? "ion-md-eye" : "ion-md-eye-off")"></i>
								<span>@(relationship?.Muting == true ? Localizer["Unmute"] : Localizer["Mute"])</span>
							</DButton>
							<DButton Size="DSize.Sm" Disabled="@(IsDefaultDisabled || isActing || relationship is null)"
									 OnClick="@(() => Do(relationship?.Blocking == true ? AccountAction.Unblock : AccountAction.Block))">
								<i class="ion-md-remove-circle text-error"></i>
								<span>@(relationship?.Blocking == true ? Localizer["Unblock"] : Localizer["Block"])</span>
							</DButton>
							<DButton Size="DSize.Sm" Disabled="IsDefaultDisabled" OnClick="@(() => isReporting = true)" data-report>
								<i class="ion-md-flag text-warning"></i>
								<span>@Localizer["Report"]</span>
							</DButton>
						</div>
						@if (isReporting)
						{
							<ReportDialog Account="account" OnClosed="@(() => isReporting = false)" />
						}
					}
				</div>

				<div class="flex flex-wrap gap-2 px-4 pt-2">
					@if (account.Locked)
					{
						<DBadge Size="DSize.Sm" Variant="DBadgeVariant.Soft"><i class="ion-md-lock"></i> @Localizer["Locked account"]</DBadge>
					}
					@if (account.Bot)
					{
						<DBadge Size="DSize.Sm" Variant="DBadgeVariant.Soft"><i class="ion-md-cog"></i> @Localizer["Bot"]</DBadge>
					}
					@if (account.Group)
					{
						<DBadge Size="DSize.Sm" Variant="DBadgeVariant.Soft"><i class="ion-md-people"></i> @Localizer["Groups"]</DBadge>
					}
				</div>

				@if (!string.IsNullOrWhiteSpace(account.Note))
				{
					<div class="post-content px-4 pt-3 text-sm md:text-base break-words">@((MarkupString)CustomEmojis.Html(account.Note, account.Emojis))</div>
				}

				@if (account.Fields.Count > 0)
				{
					<dl class="grid grid-cols-[minmax(0,10rem)_minmax(0,1fr)] gap-x-3 gap-y-1 px-4 pt-3 text-sm">
						@foreach (var field in account.Fields)
						{
							<dt class="font-semibold truncate">@CustomEmojis.Text(field.Name, account.Emojis)</dt>
							<dd class="post-content break-words min-w-0">@((MarkupString)CustomEmojis.Html(field.Value, account.Emojis))</dd>
						}
					</dl>
				}

				<div class="flex flex-wrap gap-4 px-4 py-3 text-sm tabular-nums">
					<span><b>@account.StatusesCount</b> @Localizer["posts"]</span>
					<span><b>@account.FollowingCount</b> @Localizer["following"]</span>
					<span><b>@account.FollowersCount</b> @Localizer["followers"]</span>
				</div>
			</article>

			<DTabs Active="(int)tab" ActiveChanged="SelectTab" Variant="DTabsVariant.Box" Size="DSize.Sm" ContentClass="hidden">
				<DTab><Header><span class="capitalize">@Localizer["posts"]</span></Header></DTab>
				<DTab><Header>@Localizer["Posts and replies"]</Header></DTab>
				<DTab><Header>@Localizer["Media"]</Header></DTab>
			</DTabs>

			<div class="flex flex-col gap-4">
				@if (tab is ProfileTab.Posts && pinned.Count > 0)
				{
					<div class="flex flex-col gap-4" data-pinned>
						<span class="badge badge-ghost gap-1 self-start"><i aria-hidden="true" class="ion-md-pin"></i>@Localizer["Pinned"]</span>
						@foreach (var post in pinned)
						{
							<Content @key="post.Key" Post="post" FilterIn="FilterContext.Account" OnDeleted="Remove" OnTag="OpenTag" />
						}
					</div>
				}
				@foreach (var post in posts.Where(p => tab is not ProfileTab.Posts || !pinnedKeys.Contains(p.Key)))
				{
					<Content @key="post.Key" Post="post" FilterIn="FilterContext.Account" OnDeleted="Remove" OnTag="OpenTag" />
				}
				@if (posts.Count == 0 && !isLoadingMore)
				{
					<p class="w-full text-center" data-feed-empty><i class="ion-ios-remove-circle-outline"></i> @Localizer["Empty"]</p>
				}
				@if (maxId is not null)
				{
					<DButton Size="DSize.Sm" class="self-center" Disabled="@(IsDefaultDisabled || isLoadingMore)" OnClick="LoadMore">
						@if (isLoadingMore)
						{
							<DLoading Size="DSize.Xs" LabelText="@Localizer["loading"]" />
						}
						<span>@Localizer["Load more"]</span>
					</DButton>
				}
			</div>
		}
	</div>
</section>

@code {
	[Inject] AccountService AccountService { get; set; }
	[Inject] ConfirmService Confirm { get; set; }
	[Inject] ListService ListService { get; set; }
	[Inject] InstanceService InstanceService { get; set; }
	[Inject] ILocalStorageService LocalStorage { get; set; }
	[Inject] IJSRuntime JS { get; set; }

	[Parameter] public string AccountId { get; set; }

	Account account;
	Relationship relationship;
	List<FeedPost> posts = [];
	List<FeedPost> pinned = [];
	HashSet<string> pinnedKeys = [];
	ProfileTab tab = ProfileTab.Posts;
	string maxId;
	string loadedId;
	string loadedPersonaId;
	bool isActing;
	bool isLoadingMore;
	bool isListMenuOpen;
	bool isReporting;
	List<MastodonList> allLists = [];
	HashSet<string> inLists = [];

	bool IsOwn => account is not null && account.Id == CascadingState.PersonaId;

	string FullAcct => account.Acct.Contains('@') ? account.Acct : $"{account.Acct}@{account.Host}";

	string HeaderStyle => string.IsNullOrEmpty(account?.Header) ? null : $"background-image:url('{account.Header}')";

	string FollowLabel => relationship switch
	{
		{ Following: true } => Localizer["Unfollow"],
		{ Requested: true } => Localizer["Cancel the request"],
		_ => Localizer["Follow"]
	};

	protected override async Task OnParametersSetAsync()
	{
		if (AccountId == loadedId && CascadingState.PersonaId == loadedPersonaId)
			return;
		loadedId = AccountId;
		loadedPersonaId = CascadingState.PersonaId;

		if (CascadingState.IsOffline)
		{
			WhenOnline(LoadData);
			StartOnlinePolling();
			IsLoading = false;
			return;
		}

		await LoadData();
	}

	async Task LoadData()
	{
		IsLoading = true;
		account = await AccountService.Get(AccountId);
		if (account is null)
		{
			IsLoading = false;
			return;
		}
		relationship = account.Id == CascadingState.PersonaId ? null : await AccountService.Relationship(account.Id);
		await LoadLists();
		pinned = await AccountService.Pinned(account.Id);
		pinnedKeys = [.. pinned.Select(p => p.Key)];
		posts = [];
		maxId = null;
		IsLoading = false;
		await LoadPage();
	}

	/// <summary>The persona's lists and which of them hold the account, for an account the persona follows.</summary>
	async Task LoadLists()
	{
		if (relationship?.Following != true)
		{
			allLists = [];
			inLists = [];
			return;
		}
		allLists = await ListService.All();
		inLists = [.. (await ListService.Of(account.Id)).Select(l => l.Id)];
	}

	async Task SetListMember(MastodonList list, bool member)
	{
		isActing = true;
		var result = await ListService.SetMember(list.Id, account.Id, member);
		isActing = false;
		if (result.IsInvalid)
		{
			Toast.AddResponseError(result);
			return;
		}

		if (member)
			inLists.Add(list.Id);
		else
			inLists.Remove(list.Id);
		Toast.AddResponseSuccess(member ? Localizer["{0} added to {1}.", account.Name, list.Title] : Localizer["{0} removed from {1}.", account.Name, list.Title]);
	}

	async Task LoadPage()
	{
		isLoadingMore = true;
		var result = await AccountService.Statuses(account.Id, tab, maxId);
		isLoadingMore = false;
		if (result.IsInvalid)
		{
			Toast.AddResponseError(result);
			return;
		}

		var page = (FeedPage)result.Data;
		var known = posts.Select(p => p.Key).ToHashSet();
		posts.AddRange(page.Posts.Where(p => !known.Contains(p.Key)));
		maxId = page.MaxId;
		await InstanceService.Resolve(page.Posts.Select(p => p.Host).Append(InstanceService.SelfHost));
		InstanceService.Locate(page.Posts);
	}

	async Task LoadMore() => await LoadPage();

	async Task SelectTab(int index)
	{
		tab = (ProfileTab)index;
		posts = [];
		maxId = null;
		await LoadPage();
	}

	async Task ToggleFollow() =>
		await Do(relationship is { Following: true } or { Requested: true } ? AccountAction.Unfollow : AccountAction.Follow);

	async Task Do(AccountAction action)
	{
		var name = account.Name ?? account.Acct;
		if (action is AccountAction.Block or AccountAction.Mute
			&& !await Confirm.Ask(action == AccountAction.Block ? Localizer["Block {0}?", name] : Localizer["Mute {0}?", name], null,
				Localizer[action == AccountAction.Block ? "Block" : "Mute"], action == AccountAction.Block))
			return;
		isActing = true;
		var result = await AccountService.Act(account.Id, action);
		isActing = false;
		if (result.IsInvalid)
		{
			Toast.AddResponseError(result);
			return;
		}

		relationship = (Relationship)result.Data ?? relationship;
		if (action is AccountAction.Follow or AccountAction.Unfollow)
			await LoadLists();
		Toast.AddResponseSuccess(action switch
		{
			AccountAction.Follow when relationship?.Requested == true => Localizer["Asked {0} to accept you.", account.Name],
			AccountAction.Follow => Localizer["Following {0}.", account.Name],
			AccountAction.Unfollow => Localizer["{0} unfollowed.", account.Name],
			AccountAction.Block => Localizer["{0} blocked.", account.Name],
			AccountAction.Unblock => Localizer["{0} unblocked.", account.Name],
			AccountAction.Mute => Localizer["{0} muted.", account.Name],
			_ => Localizer["{0} unmuted.", account.Name]
		});
	}

	void Remove(FeedPost post)
	{
		posts.RemoveAll(p => p.Key == post.Key);
		pinned.RemoveAll(p => p.Key == post.Key);
	}

	async Task OpenTag(string tagName)
	{
		var filter = await LocalStorage.GetItemAsync<FeedFilter>(nameof(FeedFilter)) ?? new();
		filter.Tag = tagName;
		filter.TimelineType = TimelineType.Tag;
		await LocalStorage.SetItemAsync(nameof(FeedFilter), filter);
		Navigation.NavigateTo("");
	}

	async Task Back() => await JS.InvokeVoidAsync("history.back");
}