@page "/"
@page "/cards"
@using Chrono.Components
@inject AnalyticsService AnalyticsService

<PageTitle>Chrono CCG - Card Gallery</PageTitle>

<HeadContent>
    <meta name="description" content="Browse and filter all Chrono CCG cards. Explore agents, spells, and more."/>
</HeadContent>

<div class="gallery-container">
    <div class="gallery-header">
        <h1>Card Gallery</h1>
        <p class="text-secondary">Browse all @allCards.Count cards</p>
    </div>

    <div class="category-tabs">
        <button class="tab @(categoryFilter == "" ? "active" : "")" @onclick='@(() => SetCategory(""))'>
            <i class="bi bi-grid-3x3-gap-fill"></i> All
        </button>

        <button class="tab agent @(categoryFilter == "Agent" ? "active" : "")" @onclick='@(() => SetCategory("Agent"))'>
            <i class="bi bi-person-fill"></i> Agents
        </button>
        <button class="tab agent @(categoryFilter == "Immortalized" ? "active" : "")"
                @onclick='@(() => SetCategory("Immortalized"))'>
            <i class="bi bi-person-fill"></i> Immortalized
        </button>

        <div class="tab link-toggle @(agentLink ? "active" : "")" @onclick="ToggleAgentLink"
             title="Link Agents and Immortalized cards">
            <i class="bi bi-link-45deg"></i>
            <span>Linked</span>
            <span class="toggle-switch @(agentLink ? "on" : "off")"></span>
        </div>

        <div class="category-divider"></div>

        <button class="tab spell @(categoryFilter == "Spell" ? "active" : "")" @onclick='@(() => SetCategory("Spell"))'>
            <i class="bi bi-wand"></i> Spells
        </button>
    </div>

    <div class="filter-bar">
        <div class="search-wrapper">
            <i class="bi bi-search search-icon"></i>
            <input @bind="search" @bind:event="oninput" class="form-control search-input"
                   placeholder="Search cards by name or description..."/>
            @if (search.Length > 0)
            {
                <button class="search-clear" @onclick="ClearSearch"><i class="bi bi-x-lg"></i></button>
            }
        </div>
        <div class="syndicate-toggle-group">
            @foreach (var s in syndicates)
            {
                <button class="syndicate-btn @(syndicateFilter.Contains(s) ? "active" : "") @s.ToLowerInvariant()"
                        @onclick="() => SetSyndicate(s)" title="@s">
                    <span class="syn-icon"></span>
                    <span class="syn-name">@s</span>
                </button>
            }
        </div>
        <select @bind="costFilter" class="form-select filter-select">
            <option value="">All Costs</option>
            @for (var i = 0; i <= 13; i++)
            {
                <option value="@i">@i</option>
            }
        </select>
        <div class="sort-group d-flex gap-1">
            <select @bind="sortBy" class="form-select filter-select sort-select">
                <option value="Cost">Sort by Cost</option>
                <option value="Name">Sort by Name</option>
                <option value="Attack">Sort by Attack</option>
                <option value="Health">Sort by Health</option>
                <option value="Efficiency">Sort by Efficiency</option>
            </select>
            <button class="btn btn-outline-secondary sort-dir-btn" @onclick="() => sortDescending = !sortDescending"
                    title="@(sortDescending ? "Descending" : "Ascending")">
                <i class="bi bi-sort-@(sortDescending ? "down" : "up")"></i>
            </button>
        </div>
        <button class="btn @(showDetailedView ? "btn-primary" : "btn-outline-primary") view-toggle-btn"
                @onclick="() => showDetailedView = !showDetailedView" title="Toggle Detailed View">
            <i class="bi bi-list-ul"></i>
        </button>
    </div>

    @if (HasActiveFilters)
    {
        <div class="active-filters">
            <span class="filter-label">Filters:</span>
            @if (categoryFilter != "")
            {
                <span class="filter-chip">
                    <i class="bi bi-tag-fill"></i> @categoryFilter
                    <button @onclick="ClearCategoryFilter"><i class="bi bi-x"></i></button>
                </span>
            }
            @if (syndicateFilter.Count > 0)
            {
                @foreach (var s in syndicateFilter)
                {
                    <span class="filter-chip">
                        <i class="bi bi-flag-fill"></i> @s
                        <button @onclick="() => SetSyndicate(s)"><i class="bi bi-x"></i></button>
                    </span>
                }
            }
            @if (costFilter != "")
            {
                <span class="filter-chip">
                    <i class="bi bi-lightning-fill"></i> Cost @costFilter
                    <button @onclick="ClearCostFilter"><i class="bi bi-x"></i></button>
                </span>
            }
            <button class="clear-all" @onclick="ClearFilters">Clear all</button>
        </div>
    }

    <div class="result-count">
        <span>@filteredCards.Count() card@(filteredCards.Count() != 1 ? "s" : "") found</span>
        @if (HasActiveFilters || search != "")
        {
            <span class="text-muted">out of @allCards.Count total</span>
        }
    </div>

    @if (filteredCards.Any())
    {
        <div class="card-grid @(showDetailedView ? "detailed-view" : "")">
            @{ var idx = 0; }
            @foreach (var card in filteredCards.Where(a => a.Category is "Agent" or "Spell" or "Immortalized"))
            {
                <div class="card-cell @(selectedCard == card ? "selected" : "")"
                     style="--i: @idx"
                     @onclick="() => SelectCard(card)">
                    <div class="card-image-wrapper">
                        <div class="card-shimmer"></div>
                        <img src="@card.ImagePath" alt="@card.Name" loading="lazy"
                             onerror="this.src='data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 width=%22200%22 height=%22280%22><rect fill=%22%23222244%22 width=%22200%22 height=%22280%22/><text fill=%22%23686888%22 font-size=%2214%22 x=%22100%22 y=%22140%22 text-anchor=%22middle%22 dominant-baseline=%22middle%22>No Image</text></svg>'"/>
                        
                        @if (card.Cost.HasValue)
                        {
                            <div class="card-cost-badge" title="Cost">@card.Cost</div>
                        }

                        @if (card.IsImmortalized || card.HasImmortalize)
                        {
                            <div class="card-immortalize-badge" title="@(card.IsImmortalized ? "Immortalized" : "Immortalizes")">
                                <i class="bi bi-star-fill"></i>
                            </div>
                        }

                        <div class="card-info-overlay">
                            <div class="card-name-overlay">
                                <span class="name-text">@card.Name</span>
                            </div>
                            @if (!string.IsNullOrEmpty(card.Description))
                            {
                                <div class="card-description">@card.Description</div>
                            }
                            
                            @if (card.IsImmortalized && !string.IsNullOrEmpty(card.ImmortalizeFrom))
                            {
                                <div class="card-immortalize-info">
                                    <i class="bi bi-arrow-left-circle-fill"></i> From @card.ImmortalizeFrom
                                </div>
                            }
                            else if (!string.IsNullOrEmpty(card.ImmortalizeWhen))
                            {
                                <div class="card-immortalize-info">
                                    <i class="bi bi-star-fill"></i> @card.ImmortalizeWhen
                                </div>
                            }

                            @if (card.Attack.HasValue || card.Health.HasValue)
                            {
                                <div class="card-stats-row">
                                    @if (card.Attack.HasValue)
                                    {
                                        <span class="stat attack"><i class="bi bi-crosshair"></i> @card.Attack</span>
                                    }
                                    @if (card.Health.HasValue)
                                    {
                                        <span class="stat health"><i class="bi bi-heart-fill"></i> @card.Health</span>
                                    }
                                </div>
                            }
                        </div>
                    </div>
                    @if (showDetailedView)
                    {
                        <div class="card-label">
                            <div class="card-name">@card.Name</div>
                            <div class="card-stats">
                                @if (card.Attack.HasValue)
                                {
                                    <span class="stat"><i class="bi bi-crosshair"></i> @card.Attack</span>
                                }
                                @if (card.Health.HasValue)
                                {
                                    <span class="stat"><i class="bi bi-heart-fill"></i> @card.Health</span>
                                }
                            </div>
                            <div class="card-description-preview">@card.Description</div>
                            <div class="card-category-badge @card.Category?.ToLowerInvariant()">@card.Category</div>

                        </div>
                    }
                </div>
                idx++;
            }
        </div>
    }
    else
    {
        <div class="empty-state">
            <i class="bi bi-search"></i>
            <p>No cards match your filters.</p>
            <button class="btn btn-outline-secondary" @onclick="ClearFilters">Reset Filters</button>
        </div>
    }
</div>



@if (selectedCard != null)
{
    <CardDialog Card="selectedCard" OnClose="CloseDetail" OnNavigate="SelectCard"/>
}

@code {
    private List<CardData> allCards = [];
    private IEnumerable<CardData> filteredCards => ApplyFilters();
    private string search = "";
    private string categoryFilter = "";
    private string immortalFilter = "";
    private bool agentLink = true;
    private HashSet<string> syndicateFilter = [];
    private string costFilter = "";
    private string sortBy = "Cost";
    private bool sortDescending;
    private bool showDetailedView;
    private CardData? selectedCard;
    private List<string> syndicates = [];

    private bool HasActiveFilters => categoryFilter != "" || syndicateFilter.Count > 0 || costFilter != "" || immortalFilter != "";

    protected override void OnInitialized()
    {
        allCards = CardDatabase.Cards;
        syndicates = allCards
            .Select(c => c.Faction)
            .Where(f => f != null)
            .Distinct()
            .OrderBy(f => f)
            .ToList()!;
    }

    private IEnumerable<CardData> ApplyFilters()
    {
        var primarySet = allCards.Where(c =>
            c.MatchesSearch(search) &&
            (categoryFilter == "" || c.Category == categoryFilter) &&
            (syndicateFilter.Count == 0 || (c.Faction != null && syndicateFilter.Contains(c.Faction))) &&
            (costFilter == "" || c.Cost?.ToString() == costFilter)
        );

        var sortedPrimary = sortBy switch
        {
            "Cost" => sortDescending ? primarySet.OrderByDescending(c => c.Cost) : primarySet.OrderBy(c => c.Cost),
            "Efficiency" => sortDescending ? primarySet.OrderByDescending(c => c.StatEfficiency) : primarySet.OrderBy(c => c.StatEfficiency),
            "Attack" => sortDescending ? primarySet.OrderByDescending(c => c.Attack) : primarySet.OrderBy(c => c.Attack),
            "Health" => sortDescending ? primarySet.OrderByDescending(c => c.Health) : primarySet.OrderBy(c => c.Health),
            _ => sortDescending ? primarySet.OrderByDescending(c => c.Name) : primarySet.OrderBy(c => c.Name)
        };

        if (!agentLink)
        {
            return sortedPrimary;
        }

        var result = new List<CardData>();
        var seen = new HashSet<string>();
        foreach (var card in sortedPrimary)
        {
            if (seen.Contains(card.Name)) continue;

            // Determine the "Chain Head" (the Agent)
            var head = card;
            if (card.Category == "Immortalized" && card.ImmortalizeFrom != null)
            {
                var source = allCards.FirstOrDefault(c => c.Name == card.ImmortalizeFrom);
                if (source != null) head = source;
            }

            // Add the chain starting from head
            if (!seen.Contains(head.Name))
            {
                result.Add(head);
                seen.Add(head.Name);
            }

            if (head.ImmortalizeTo != null)
            {
                foreach (var targetName in head.ImmortalizeTo)
                {
                    if (seen.Contains(targetName)) continue;
                    var linked = allCards.FirstOrDefault(c => c.Name == targetName);
                    if (linked != null)
                    {
                        result.Add(linked);
                        seen.Add(linked.Name);
                    }
                }
            }

            // Ensure the original card is added if it was somehow not part of the head's chain
            if (!seen.Contains(card.Name))
            {
                result.Add(card);
                seen.Add(card.Name);
            }
        }

        return result;
    }

    private void SetImmortal(string imm)
    {
        immortalFilter = immortalFilter == imm ? "" : imm;
    }

    private void ClearImmortalFilter()
    {
        immortalFilter = "";
    }

    private void SetSyndicate(string syn)
    {
        if (syndicateFilter.Contains(syn))
        {
            syndicateFilter.Remove(syn);
        }
        else
        {
            syndicateFilter.Add(syn);
        }
    }

    private void SetCategory(string cat)
    {
        categoryFilter = categoryFilter == cat ? "" : cat;
        _ = AnalyticsService.TrackEvent("filter_category", new { category = categoryFilter });
    }

    private void ClearCategoryFilter()
    {
        categoryFilter = "";
        _ = AnalyticsService.TrackEvent("filter_category", new { category = "All" });
    }

    private void ClearSyndicateFilter()
    {
        syndicateFilter.Clear();
    }

    private void ToggleAgentLink()
    {
        agentLink = !agentLink;
        OnToggleAgentLink();
    }

    private void OnToggleAgentLink()
    {
        _ = AnalyticsService.TrackEvent("toggle_agent_link", new { enabled = agentLink });
    }

    private void ClearCostFilter()
    {
        costFilter = "";
    }

    private void ClearSearch()
    {
        search = "";
    }

    private void SelectCard(CardData card)
    {
        selectedCard = card;
        _ = AnalyticsService.TrackEvent("select_item", new { item_name = card.Name, item_category = card.Category });
    }

    private void CloseDetail()
    {
        selectedCard = null;
    }

    private void ClearFilters()
    {
        search = "";
        categoryFilter = "";
        syndicateFilter.Clear();
        costFilter = "";
    }

}