@page "/search"
@attribute [Authorize]
@inherits LocalizableComponentBase
<Title>@Localizer["Search"]</Title>

@* Accounts, posts and hashtags (/api/v2/search). A handle (name@host) or a post's address is resolved by PrivaPub,
   which fetches it from its server if it has not met it yet; the browser never contacts another server. *@
<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">

		<EditForm Model="form" OnValidSubmit="Run" class="flex flex-wrap gap-2 items-center">
			<DInput TValue="string" class="flex-1 min-w-48" @bind-Value="form.Query" autocomplete="off" type="search"
					placeholder="@Localizer["Search accounts, posts and tags, or paste an address"]">
				<Prefix><i class="ion-md-search"></i></Prefix>
			</DInput>
			<DButton Type="submit" Size="DSize.Sm" Color="DColor.Primary" Disabled="@(IsDefaultDisabled || isSearching)">
				@if (isSearching)
				{
					<DLoading Size="DSize.Xs" LabelText="@Localizer["loading"]" />
				}
				<span>@Localizer["Search"]</span>
			</DButton>
		</EditForm>

		@if (searched)
		{
			@if (results.Accounts.Count == 0 && results.Statuses.Count == 0 && results.Hashtags.Count == 0)
			{
				<p class="w-full text-center"><i class="ion-ios-remove-circle-outline"></i> @Localizer["Nothing found."]</p>
			}

			@if (results.Accounts.Count > 0)
			{
				<h2 class="font-bold">@Localizer["Accounts"]</h2>
				<div class="flex flex-col gap-2">
					@foreach (var account in results.Accounts)
					{
						<a class="flex items-center gap-3 p-3 rounded-xl neo-raised neo-2xs min-w-0" href="@($"account/{Uri.EscapeDataString(account.Id)}")">
							@* alt="": the name is next to it. *@
							<img alt="" class="h-10 w-10 flex-none object-cover rounded-full" src="@(account.Avatar ?? "imgs/icon-192.png")" />
							<span class="flex flex-col min-w-0">
								<b class="truncate">@account.Name</b>
								<span class="text-xs opacity-70 truncate">@("@" + account.Acct)</span>
							</span>
						</a>
					}
				</div>
			}

			@if (results.Hashtags.Count > 0)
			{
				<h2 class="font-bold">@Localizer["Hashtags"]</h2>
				<div class="flex flex-wrap gap-2">
					@foreach (var tag in results.Hashtags)
					{
						<DButton Size="DSize.Sm" OnClick="@(() => OpenTag(tag.Name))">#@tag.Name</DButton>
					}
				</div>
			}

			@if (results.Statuses.Count > 0)
			{
				<h2 class="font-bold">@Localizer["Posts and replies"]</h2>
				<div class="flex flex-col gap-4">
					@foreach (var post in statuses)
					{
						<Content @key="post.Key" Post="post" OnTag="OpenTag" />
					}
				</div>
			}
		}
	</div>
</section>

@code {
	[Inject] AccountService AccountService { get; set; }
	[Inject] InstanceService InstanceService { get; set; }
	[Inject] ILocalStorageService LocalStorage { get; set; }

	[SupplyParameterFromQuery(Name = "q")] public string Q { get; set; }

	sealed class SearchForm
	{
		public string Query { get; set; }
	}

	SearchForm form = new();
	SearchResults results = new();
	List<FeedPost> statuses = [];
	bool searched;
	bool isSearching;

	protected override async Task OnInitializedAsync()
	{
		IsLoading = false;
		if (string.IsNullOrWhiteSpace(Q))
			return;
		form.Query = Q;
		await Run();
	}

	async Task Run()
	{
		if (string.IsNullOrWhiteSpace(form.Query))
			return;
		isSearching = true;
		// a handle or an address is something to resolve; plain words only search what PrivaPub already holds
		var resolve = form.Query.Contains('@') || form.Query.StartsWith("http", StringComparison.OrdinalIgnoreCase);
		results = await AccountService.Search(form.Query, resolve);
		statuses = [.. results.Statuses.Select(FeedPost.Of)];
		searched = true;
		isSearching = false;
		await InstanceService.Resolve(statuses.Select(p => p.Host).Append(InstanceService.SelfHost));
		InstanceService.Locate(statuses);
		// a handle opens its account's profile, whatever else matched
		var handle = form.Query.Trim().TrimStart('@');
		if (form.Query.Contains('@') && results.Accounts.FirstOrDefault(a => string.Equals(a.Acct, handle, StringComparison.OrdinalIgnoreCase)
				|| string.Equals($"{a.Acct}@{InstanceService.SelfHost}", handle, StringComparison.OrdinalIgnoreCase)) is { } exact)
			Navigation.NavigateTo($"account/{Uri.EscapeDataString(exact.Id)}");
		else if (results.Accounts.Count == 1 && results.Statuses.Count == 0 && form.Query.Contains('@'))
			Navigation.NavigateTo($"account/{Uri.EscapeDataString(results.Accounts[0].Id)}");
	}

	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("");
	}
}