@using System.Text.RegularExpressions
@using Microsoft.AspNetCore.Components.Rendering
@implements IDisposable
@namespace Chrono.Components

@if (Card != null)
{
<div class="modal-backdrop" @onclick="HandleBackdropClick"></div>
<div class="card-detail @(!HasImage ? "card-detail-noimg" : "")">
    <button class="detail-close" @onclick="HandleClose"><i class="bi bi-x-lg"></i></button>
    <div class="detail-layout @(!HasImage ? "layout-noimg" : "")">
        @if (HasImage)
        {
            <div class="detail-image">
                <img src="@Card.ImagePath" alt="@Card.Name"
                     onerror="this.src='@Card.SmallImagePath';this.onerror=null;"/>
            </div>
        }
        <div class="detail-info">
            <div class="detail-header">
                <h2>@Card.Name</h2>
                <div class="detail-meta">
                    <span class="meta-badge category @Card.Category?.ToLowerInvariant()">@Card.Category</span>
                    @if (Card.Cost.HasValue)
                    {
                        <span class="meta-badge cost"><i class="bi bi-lightning-fill"></i> @Card.Cost</span>
                    }
                    @if (Card.Attack.HasValue)
                    {
                        <span class="meta-badge attack"><i class="bi bi-crosshair"></i> @Card.Attack</span>
                    }
                    @if (Card.Health.HasValue)
                    {
                        <span class="meta-badge health"><i class="bi bi-heart-fill"></i> @Card.Health</span>
                    }
                    @if (Card.Speed != null)
                    {
                        <span class="meta-badge speed"><i class="bi bi-wind"></i> @Card.Speed</span>
                    }
                </div>
            </div>

            @if (Card.Syndicate != null)
            {
                <div class="detail-field">
                    <span class="field-label"><i class="bi bi-diagram-3-fill"></i> Syndicate</span>
                    <span class="field-value">@Card.Syndicate</span>
                </div>
            }

            @if (Card.Description != null)
            {
                <div class="detail-field description">
                    <span class="field-label"><i class="bi bi-chat-quote-fill"></i></span>
                    <div class="markdown-content">
                        @RenderDescription(Card.Description)
                    </div>
                </div>
            }

            @if (Card.Set != null)
            {
                <div class="detail-field">
                    <span class="field-label"><i class="bi bi-collection"></i> Set</span>
                    <span class="field-value">@Card.Set</span>
                </div>
            }

            @if (Card.Archetypes is { Count: > 0 })
            {
                <div class="detail-field">
                    <span class="field-label"><i class="bi bi-layers-fill"></i> Archetypes</span>
                    <span class="field-value">@string.Join(", ", Card.Archetypes)</span>
                </div>
            }

            @if (Card.ImmortalizeWhen != null)
            {
                <div class="detail-field">
                    <span class="field-label"><i class="bi bi-star-fill"></i> Immortalize When</span>
                    <span class="field-value">@Card.ImmortalizeWhen</span>
                </div>
            }

            @if (Card.HasImmortalize)
            {
                <div class="detail-field">
                    <span class="field-label"><i class="bi bi-arrow-right-circle-fill"></i> Immortalizes To</span>
                    <span class="field-value">
                            @foreach (var name in Card.ImmortalizeTo!)
                        {
                            var targetName = name;
                            var target = LookupCard(targetName);
                            if (target != null)
                            {
                                <button class="inline-card-btn"
                                        @onclick="() => Navigate(targetName)">@targetName</button>
                            }
                            else
                            {
                                @targetName
                            }
                        }
                        </span>
                </div>
            }

            @if (Card.ImmortalizeFrom != null)
            {
                <div class="detail-field">
                    <span class="field-label"><i class="bi bi-arrow-left-circle-fill"></i> Immortalizes From</span>
                    <span class="field-value">
                            @{
                            var fromCard = LookupCard(Card.ImmortalizeFrom);
                            if (fromCard != null)
                            {
                                <button class="inline-card-btn"
                                        @onclick="() => Navigate(Card.ImmortalizeFrom)">@Card.ImmortalizeFrom</button>
                            }
                            else
                            {
                                @Card.ImmortalizeFrom
                            }
                        }
                        </span>
                </div>
            }

            @if (canShowNotes)
            {
                <div class="detail-field note">
                    @if (Auth.IsLoggedIn)
                    {
                        <span class="field-label"><i
                                class="bi bi-pencil-fill"></i> Personal Note (@Auth.CurrentUsername)</span>
                        <textarea class="form-control note-input" @bind="currentNote" @onblur="SaveNote"
                                  placeholder="Add a private note about this card..."></textarea>
                        @if (isSaving)
                        {
                            <span class="saving-indicator">Saving...</span>
                        }
                    }
                    else
                    {
                        <span class="field-label"><i class="bi bi-pencil-fill"></i> Personal Note</span>
                        <div class="small text-secondary mt-1">
                            <a href="login" class="text-warning fw-semibold text-decoration-none">
                                <i class="bi bi-box-arrow-in-right me-1"></i> Log in
                            </a> to view and write private notes for this card.
                        </div>
                    }
                </div>
            }
        </div>
    </div>
</div>
}

@code {
[Parameter] public CardData? Card { get; set; }
[Parameter] public EventCallback OnClose { get; set; }
[Parameter] public EventCallback<string> OnNavigate { get; set; }
[Parameter] public bool ShowNotes { get; set; } = true;

[Inject] private CardNotesGraphQLService NotesService { get; set; } = default!;
[Inject] private NetworkStatusService NetworkStatus { get; set; } = default!;
[Inject] private AuthService Auth { get; set; } = default!;

private bool HasImage => Card?.ImageFile is { Length: > 0 } && Card.ImageFile != "placeholder.png";

private string currentNote = "";
private bool isSaving;
private bool isApiOnline;
private bool canShowNotes => ShowNotes && NetworkStatus.IsOnline;

protected override void OnInitialized()
{
    NetworkStatus.StatusChanged += HandleStatusChanged;
    Auth.AuthStateChanged += HandleAuthStateChanged;
}

private void HandleAuthStateChanged()
{
    if (Auth.IsLoggedIn && Card != null && NetworkStatus.IsOnline)
    {
        _ = LoadNote();
    }
    else if (!Auth.IsLoggedIn)
    {
        currentNote = "";
    }

    InvokeAsync(StateHasChanged);
}

private async void HandleStatusChanged(bool online)
{
    if (online)
    {
        isApiOnline = await NotesService.IsApiOnlineAsync();
        if (isApiOnline && Card != null && Auth.IsLoggedIn)
        {
            await LoadNote();
        }
    }
    else
    {
        isApiOnline = false;
    }

    await InvokeAsync(StateHasChanged);
}

protected override async Task OnParametersSetAsync()
{
    if (Card != null && ShowNotes)
    {
        currentNote = "";
        if (NetworkStatus.IsOnline)
        {
            isApiOnline = await NotesService.IsApiOnlineAsync();
            if (isApiOnline && Auth.IsLoggedIn)
            {
                await LoadNote();
            }
        }
        else
        {
            isApiOnline = false;
        }
    }
}

private async Task LoadNote()
{
    if (Card == null || !Auth.IsLoggedIn) return;
    try
    {
        currentNote = await NotesService.GetNoteAsync(Card.Name);
    }
    catch
    {
        currentNote = "";
    }
}

private async Task SaveNote()
{
    if (Card == null || !canShowNotes || !Auth.IsLoggedIn) return;

    isSaving = true;
    try
    {
        await NotesService.SaveNoteAsync(Card.Name, currentNote);
    }
    catch
    {
    }
    finally
    {
        isSaving = false;
    }
}

public void Dispose()
{
    NetworkStatus.StatusChanged -= HandleStatusChanged;
    Auth.AuthStateChanged -= HandleAuthStateChanged;
}

private void HandleClose()
{
    _ = OnClose.InvokeAsync();
}

private void HandleBackdropClick()
{
    _ = OnClose.InvokeAsync();
}

private void Navigate(string name)
{
    var card = LookupCard(name);
    if (card != null)
    {
        Card = card;
        _ = LoadNote();
        StateHasChanged();
    }
    else
    {
        _ = OnNavigate.InvokeAsync(name);
    }
}

private static CardData? LookupCard(string cardName)
{
    return CardDatabase.Cards.FirstOrDefault(c =>
        string.Equals(c.Name, cardName, StringComparison.OrdinalIgnoreCase));
}

private static DocData? LookupDoc(string title)
{
    return DocDatabase.Docs.FirstOrDefault(d =>
        string.Equals(d.Title, title, StringComparison.OrdinalIgnoreCase));
}

private RenderFragment RenderDescription(string content)
{
    return builder =>
    {
        if (string.IsNullOrWhiteSpace(content)) return;

        var seq = 0;
        var lines = content.Split(['\r', '\n'], StringSplitOptions.None);
        var inList = false;
        var tableLines = new List<string>();
        var inTable = false;

        for (var i = 0; i < lines.Length; i++)
        {
            var line = lines[i];
            var trimmedLine = line.Trim();

            // Handle Tables
            if (trimmedLine.StartsWith("|") && trimmedLine.EndsWith("|"))
            {
                inTable = true;
                tableLines.Add(trimmedLine);
                continue;
            }

            if (inTable)
            {
                RenderTable(builder, ref seq, tableLines);
                tableLines.Clear();
                inTable = false;
            }

            // Handle Lists
            if (trimmedLine.StartsWith("- ") || trimmedLine.StartsWith("* "))
            {
                if (!inList)
                {
                    builder.OpenElement(seq++, "ul");
                    inList = true;
                }

                var isCardListItem = trimmedLine.Contains("[[") && trimmedLine.Contains("]]");
                builder.OpenElement(seq++, "li");
                RenderInlines(builder, ref seq, trimmedLine[2..], true);
                builder.CloseElement();
                continue;
            }

            if (inList)
            {
                builder.CloseElement(); // Close ul
                inList = false;
            }

            // Handle Headings
            if (trimmedLine.StartsWith("### "))
            {
                builder.OpenElement(seq++, "h4");
                RenderInlines(builder, ref seq, trimmedLine[4..], false);
                builder.CloseElement();
            }
            else if (trimmedLine.StartsWith("## "))
            {
                builder.OpenElement(seq++, "h3");
                RenderInlines(builder, ref seq, trimmedLine[3..], false);
                builder.CloseElement();
            }
            else if (trimmedLine.StartsWith("# "))
            {
                builder.OpenElement(seq++, "h2");
                RenderInlines(builder, ref seq, trimmedLine[2..], false);
                builder.CloseElement();
            }
            else if (!string.IsNullOrWhiteSpace(trimmedLine))
            {
                builder.OpenElement(seq++, "p");
                RenderInlines(builder, ref seq, line, false);
                builder.CloseElement();
            }
        }

        if (inTable) RenderTable(builder, ref seq, tableLines);
        if (inList) builder.CloseElement();
    };
}

private void RenderTable(RenderTreeBuilder builder, ref int seq, List<string> lines)
{
    if (lines.Count < 2) return;

    builder.OpenElement(seq++, "div");
    builder.AddAttribute(seq++, "class", "table-responsive");
    builder.OpenElement(seq++, "table");
    builder.AddAttribute(seq++, "class", "markdown-table");

    var hasHeader = lines.Count > 2 && lines[1].Contains("---");
    var startIdx = 0;

    if (hasHeader)
    {
        builder.OpenElement(seq++, "thead");
        builder.OpenElement(seq++, "tr");
        var cells = lines[0].Split('|', StringSplitOptions.RemoveEmptyEntries);
        foreach (var cell in cells)
        {
            builder.OpenElement(seq++, "th");
            RenderInlines(builder, ref seq, cell.Trim(), false);
            builder.CloseElement();
        }

        builder.CloseElement();
        builder.CloseElement();
        startIdx = 2;
    }

    builder.OpenElement(seq++, "tbody");
    for (var i = startIdx; i < lines.Count; i++)
    {
        if (i == 1 && hasHeader) continue;
        builder.OpenElement(seq++, "tr");
        var cells = lines[i].Split('|', StringSplitOptions.RemoveEmptyEntries);
        foreach (var cell in cells)
        {
            builder.OpenElement(seq++, "td");
            RenderInlines(builder, ref seq, cell.Trim(), false);
            builder.CloseElement();
        }

        builder.CloseElement();
    }

    builder.CloseElement();
    builder.CloseElement();
    builder.CloseElement();
}

private void RenderInlines(RenderTreeBuilder builder, ref int seq, string text, bool renderAsImage)
{
    var remaining = text;

    while (!string.IsNullOrEmpty(remaining))
    {
        var boldMatch = Regex.Match(remaining, @"\*\*(.*?)\*\*");
        var italicMatch = Regex.Match(remaining, @"\*(.*?)\*");
        var cardMatch = Regex.Match(remaining, @"\[\[(.*?)\]\]");

        var bestIdx = int.MaxValue;
        Match? bestMatch = null;
        var matchType = 0; // 1: bold, 2: italic, 3: card

        if (boldMatch.Success && boldMatch.Index < bestIdx)
        {
            bestIdx = boldMatch.Index;
            bestMatch = boldMatch;
            matchType = 1;
        }

        if (italicMatch.Success && italicMatch.Index < bestIdx)
        {
            bestIdx = italicMatch.Index;
            bestMatch = italicMatch;
            matchType = 2;
        }

        if (cardMatch.Success && cardMatch.Index < bestIdx)
        {
            bestIdx = cardMatch.Index;
            bestMatch = cardMatch;
            matchType = 3;
        }

        if (bestMatch != null)
        {
            if (bestIdx > 0)
                builder.AddContent(seq++, remaining[..bestIdx]);

            var innerText = bestMatch.Groups[1].Value;

            if (matchType == 1) // Bold
            {
                builder.OpenElement(seq++, "strong");
                builder.AddContent(seq++, innerText);
                builder.CloseElement();
            }
            else if (matchType == 2) // Italic
            {
                builder.OpenElement(seq++, "em");
                builder.AddContent(seq++, innerText);
                builder.CloseElement();
            }
            else if (matchType == 3) // Card Link / Doc Link
            {
                var card = LookupCard(innerText);
                var doc = LookupDoc(innerText);
                if (card != null || doc != null)
                {
                    builder.OpenElement(seq++, "button");
                    builder.AddAttribute(seq++, "class", "inline-card-btn");
                    builder.AddAttribute(seq++, "onclick", EventCallback.Factory.Create(this, () => Navigate(innerText)));
                    builder.AddContent(seq++, innerText);
                    builder.CloseElement();
                }
                else
                {
                    builder.AddContent(seq++, innerText);
                }
            }

            remaining = remaining[(bestIdx + bestMatch.Length)..];
        }
        else
        {
            builder.AddContent(seq++, remaining);
            remaining = "";
        }
    }
}

}