@page "/{User}"
@using Iceshrimp.Frontend.Core.Miscellaneous
@using Iceshrimp.Frontend.Core.Services
@using Iceshrimp.Shared.Schemas
@using Iceshrimp.Frontend.Components
@using Iceshrimp.Frontend.Components.Note
@using System.Text.RegularExpressions
@inject ApiService            Api

@if (_init)
{
    <div class="scroller">
        <div class="profile-card">
            <div class="header">
                <div>
                    <img class="avatar" src="@UserResponse.AvatarUrl"/>
                </div>
                <div class="name-section">
                    <div class="name">@UserResponse.DisplayName</div>
                    <div class="identifier">
                        @@@UserResponse.Username
                        @if (UserResponse.Host != null)
                        {
                            var host = $"@{UserResponse.Host}";
                            @host
                        }
                    </div>
                </div>
            </div>
            <ProfileInfo UserProfile="Profile"/>
        </div>
        @if (UserNotes.Count > 0)
        {
            <div class="notes">
                @foreach (var note in UserNotes)
                {
                    <div class="note-container">
                        <Note NoteResponse="note"/>
                    </div>
                }
            </div>
            <ScrollEnd IntersectionChange="AddNotes" ManualLoad="AddNotes" Class="end"/>
        }
    </div>
}
@if (_loading)
{
    <div>loading</div>
}
@if (_notFound)
{
    <div>User does not exist!</div>
}
@if (_error)
{
    <div>Failure</div>
}

@code {

    [Parameter] public string?              User         { get; set; }
    [Parameter] public string?              Host         { get; set; }
    private            UserResponse         UserResponse { get; set; } = null!;
    private            UserProfileResponse? Profile      { get; set; }
    private            string?              MinId        { get; set; }
    private            List<NoteResponse>   UserNotes    { get; set; } = [];

    private bool _loading = true;
    private bool _init;
    private bool _notFound;
    private bool _error;
    private bool _fetchLock;

    private async Task GetNotes(string? minId)
    {
        var pq    = new PaginationQuery() { Limit = 10, MaxId = minId };
        var notes = await Api.Users.GetUserNotes(UserResponse.Id, pq);
        if (notes is not null && notes.Count > 0)
        {
            MinId = notes.Last().Id;
            UserNotes.AddRange(notes);
            StateHasChanged();
        }
    }

    private async Task AddNotes()
    {
        if (_fetchLock == false)
        {
            _fetchLock = true;
            await GetNotes(MinId);
            _fetchLock = false;
        }
    }

    private async Task LoadProfile()
    {
        try
        {
            if (User is null)
            {
                _notFound = true;
            }
            else
            {
                var pattern      = "^@(.[^@]+)@?(.+)?$";
                var matches      = Regex.Match(User, pattern);
                var userResponse = await Api.Users.LookupUser(matches.Groups[1].Value, matches.Groups[2].Value);
                if (userResponse is null)
                {
                    _notFound = true;
                }
                else
                {
                    UserResponse = userResponse;
                    Profile      = await Api.Users.GetUserProfile(UserResponse.Id);
                    await GetNotes(null);
                    _init    = true;
                    _loading = false;
                }
            }
        }
        catch (ApiException)
        {
            _loading = false;
            _error   = true;
        }
    }

    protected override async Task OnInitializedAsync()
    {
        await LoadProfile();
    }

    protected override async Task OnParametersSetAsync()
    {
        _init     = false;
        _loading  = true;
        UserNotes = [];
        MinId     = null;
        Profile   = null;
        StateHasChanged();
        await LoadProfile();
    }

}