@inject Shared.Services.CardRenderingService CardRenderer
@inject Shared.Services.CardPreviewService PreviewService
@namespace Shared.Pages
@page "/docs"

<PageTitle>Docs</PageTitle>

<div class="docs-page">
    <div class="docs-header">
        <h1>Documentation</h1>
        <p class="text-muted">Rules, keywords, factions, and more.</p>
    </div>

    <div class="docs-container">
        <aside class="docs-sidebar">
            <div class="search-box">
                <i class="bi bi-search"></i>
                <input type="text" placeholder="Search docs..." @bind="searchQuery" @bind:event="oninput"/>
            </div>

            <div class="category-list">
                <div class="category-item @(selectedCategory == null ? "active" : "")"
                     @onclick="() => SelectCategory(null)">
                    All Pages
                </div>
                @foreach (var category in categories)
                {
                    var cat = category;
                    <div class="category-item @(selectedCategory == cat ? "active" : "")"
                         @onclick="() => SelectCategory(cat)">
                        @cat
                    </div>
                }
            </div>
        </aside>

        <main class="docs-content">
            @if (selectedDoc == null)
            {
                <div class="doc-list">
                    @foreach (var doc in filteredDocs)
                    {
                        <div class="doc-card" @onclick="() => SelectDoc(doc)">
                            <div class="doc-card-category">@doc.Category</div>
                            <h3 class="doc-card-title">@doc.Title</h3>
                            @if (GetField(doc, "description") is { Length: > 0 } desc)
                            {
                                <p class="doc-card-desc">@desc</p>
                            }
                        </div>
                    }
                    @if (!filteredDocs.Any())
                    {
                        <div class="empty-state">
                            <i class="bi bi-search"></i>
                            <p>No documentation found matching your search.</p>
                        </div>
                    }
                </div>
            }
            else
            {
                <article class="doc-article">
                    <button class="btn-back" @onclick="() => SelectDoc(null)">
                        <i class="bi bi-arrow-left"></i> Back to list
                    </button>

                    <header class="doc-header">
                        <div class="doc-meta">@selectedDoc.Category</div>
                        <h1>@selectedDoc.Title</h1>
                    </header>

                    <div class="doc-fields">
                        @{
                            var fm = selectedDoc.Frontmatter;
                        }

                        @foreach (var kvp in fm)
                        {
                            var key = kvp.Key;
                            var val = kvp.Value;

                            if (string.IsNullOrWhiteSpace(val)) continue;

                            <div class="doc-field">
                                <span class="doc-field-key">@GetLabel(key)</span>

                                @if (key == "description")
                                {
                                    <div class="doc-field-desc">
                                        @CardRenderer.RenderDescription(val, _ => {}, doc => PreviewService.SelectDoc(doc), PreviewService)
                                    </div>
                                }
                                else
                                {
                                    <span class="doc-field-val">@val</span>
                                }
                            </div>
                        }
                    </div>
                </article>
            }
        </main>
    </div>
</div>

@code {
    private string searchQuery = "";
    private string? selectedCategory;
    private DocData? selectedDoc;

    private List<string> categories = [];
    private List<DocData> allDocs = [];

    protected override void OnInitialized()
    {
        allDocs = DocDatabase.Docs.OrderBy(d => d.Category).ThenBy(d => d.Title).ToList();
        categories = allDocs.Select(d => d.Category).Distinct().OrderBy(c => c).ToList();
    }

    private IEnumerable<DocData> filteredDocs => allDocs
        .Where(d => (selectedCategory == null || d.Category == selectedCategory) &&
                    (string.IsNullOrWhiteSpace(searchQuery) ||
                     d.Title.Contains(searchQuery, StringComparison.OrdinalIgnoreCase) ||
                     (GetField(d, "description")?.Contains(searchQuery, StringComparison.OrdinalIgnoreCase) ?? false)));

    private void SelectCategory(string? category)
    {
        selectedCategory = category;
        selectedDoc = null;
    }

    private void SelectDoc(DocData? doc)
    {
        selectedDoc = doc;
    }

    private static string? GetField(DocData doc, string key)
    {
        return doc.Frontmatter.TryGetValue(key, out var val) && !string.IsNullOrWhiteSpace(val) ? val : null;
    }

    private static string GetLabel(string key)
    {
        return key switch
        {
            "category" => "Category",
            "description" => "Description",
            "essencePrice" => "Essence Price",
            "crytalPrice" => "Crystal Price",
            "coreChargesPrice" => "Core Charges Price",
            "pricePerPack" => "Price per Pack",
            "codeCharges" => "Code Charges",
            "coreCharges" => "Core Charges",
            "currency" => "Currency",
            "faction" => "Faction",
            "exp" => "EXP Reward",
            "see" => "See Also",
            _ => string.Concat(key.Select((c, i) => i > 0 && char.IsUpper(c) ? " " + c : c.ToString()))
        };
    }

}