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<script lang="ts">
    import Leaderboard from "./Leaderboard.svelte";
    import ModelDetails from "./ModelDetails.svelte";
    import Viewer from "./Viewer.svelte";
    import Vote from "./Vote.svelte";
    import About from "./About.svelte";
    import { Filter, CheckmarkOutline } from "carbon-icons-svelte";
    import { onMount } from "svelte";
    import { CaretDown, Code } from "carbon-icons-svelte";

    interface Scene {
        name: string;
        url: string;
        thumbnail: string;
    }

    let currentView: "Leaderboard" | "Vote" | "ModelDetails" | "Viewer" | "About" = "Vote";
    let selectedEntry: { name: string } | null = null;
    let selectedScene: Scene | null = null;
    let showOnlyOpenSource = false;
    let showFilter = false;
    let filterContainer: HTMLDivElement;

    function handleClickOutside(event: MouseEvent) {
        if (filterContainer && !filterContainer.contains(event.target as Node)) {
            showFilter = false;
        }
    }

    onMount(() => {
        document.addEventListener("click", handleClickOutside);
        return () => {
            document.removeEventListener("click", handleClickOutside);
        };
    });

    function goHome() {
        window.location.href = "/";
    }

    function showModelDetails(entry: { name: string }) {
        selectedEntry = entry;
        currentView = "ModelDetails";
    }

    function showScene(scene: Scene) {
        selectedScene = scene;
        currentView = "Viewer";
    }
</script>

<div class="container">
    <div on:pointerdown={goHome} class="banner">
        <h1>3D Arena</h1>
        <p>Generative 3D Leaderboard</p>
    </div>

    {#if currentView === "Leaderboard" || currentView === "Vote" || currentView === "About"}
        <div class="tabs">
            <button on:click={() => (currentView = "Vote")} class={currentView === "Vote" ? "active" : ""}>Vote</button>
            <button on:click={() => (currentView = "Leaderboard")} class={currentView === "Leaderboard" ? "active" : ""}
                >Leaderboard</button
            >
            <button on:click={() => (currentView = "About")} class={currentView === "About" ? "active" : ""}
                >About</button
            >
            {#if currentView === "Leaderboard"}
                <div class="filter-container" bind:this={filterContainer}>
                    <button
                        class="filter-button"
                        on:click={() => (showFilter = !showFilter)}
                        aria-expanded={showFilter}
                        aria-haspopup="true"
                    >
                        <Filter size={20} />
                        <CaretDown size={16} class="caret" />
                    </button>
                    {#if showFilter}
                        <div class="filter-dropdown" role="menu" aria-label="Filter options">
                            <div class="filter-section">
                                <div class="filter-section-title">Filter Options</div>
                                <div
                                    class="filter-option {showOnlyOpenSource ? 'active' : ''}"
                                    on:click={() => (showOnlyOpenSource = !showOnlyOpenSource)}
                                    on:keydown={(e) => e.key === "Enter" && (showOnlyOpenSource = !showOnlyOpenSource)}
                                    role="menuitemcheckbox"
                                    aria-checked={showOnlyOpenSource}
                                    tabindex="0"
                                >
                                    <div class="filter-label">
                                        <Code size={16} class="filter-icon" />
                                        Open source
                                    </div>
                                    <span class="filter-checkbox"></span>
                                </div>
                            </div>
                        </div>
                    {/if}
                </div>
            {/if}
        </div>
    {/if}

    {#if currentView === "Leaderboard"}
        <Leaderboard onEntryClick={showModelDetails} {showOnlyOpenSource} />
    {:else if currentView === "Vote"}
        <Vote />
    {:else if currentView === "ModelDetails" && selectedEntry}
        <ModelDetails
            modelName={selectedEntry.name}
            onBack={() => (currentView = "Leaderboard")}
            onSceneClick={showScene}
        />
    {:else if currentView === "Viewer" && selectedScene && selectedEntry}
        <Viewer modelName={selectedEntry.name} scene={selectedScene} onBack={() => (currentView = "ModelDetails")} />
    {:else if currentView === "About"}
        <About />
    {/if}
</div>