divan/DiwanRazor/Pages/Shared/_SemanticSearchWidgetPartial.cshtml

@{
    // Global floating "find a poem about..." widget — included once from _Layout.cshtml, so it
    // appears on every page that opts into that shared layout, same guarantee the theme toggle
    // has. Self-contained CSS (scoped under #ss-widget* ids) rather than added to p8.css
    // deliberately - avoids needing a cache-busting version bump on that large shared file for
    // every iteration of a still-settling feature, at the cost of not being in the "official"
    // stylesheet yet. Reuses real site CSS variables (--card-inner, --border-gold, --brand,
    // --text-muted, --bg-page) throughout for visual consistency regardless.
    //
    // Calls APIRoot.SemanticSearchUrl DIRECTLY from browser JS (not a server-side proxy) - see
    // the comment on SemanticSearchUrl in APIRoot.cs for why it's a separate, currently-isolated
    // domain. CORS is already wide open on that backend (Startup.cs: SetIsOriginAllowed(_ =>
    // true)), confirmed before choosing this approach rather than guessed.
}
<style>
    #ss-widget-launcher {
        position: fixed;
        bottom: 74px; /* stacked above the theme toggle (bottom:20px, 44px tall) with a real gap - */
        left: 20px;   /* not touching, so they read as two distinct controls, not one fused blob */
        z-index: 999;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 44px;
        height: 44px;
        border-radius: 50%;
        background: var(--card-inner);
        border: 1.5px solid var(--border-gold);
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
        cursor: pointer;
        transition: all 0.25s ease;
    }

    #ss-widget-launcher:hover {
        background: var(--card-nested);
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    }

    #ss-widget-backdrop {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.35);
        z-index: 998;
    }

    #ss-widget-panel {
        position: fixed;
        bottom: 20px;
        left: 20px; /* anchored on the same side as the launcher, so the panel feels connected to
                       where you clicked rather than popping up across the screen */
        z-index: 1000;
        width: 360px;
        max-width: calc(100vw - 40px);
        max-height: 70vh;
        display: flex;
        flex-direction: column;
        background: var(--bg-page);
        border: 1.5px solid var(--border-gold);
        border-radius: 14px;
        box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
        overflow: hidden;
    }

    #ss-widget-panel.ss-widget-maximized {
        top: 5vh;
        bottom: 5vh;
        left: 50%;
        right: auto;
        transform: translateX(-50%);
        width: min(760px, 92vw);
        max-height: none;
    }

    #ss-widget-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 12px 14px;
        border-bottom: 1px solid var(--border-gold);
        font-weight: 600;
        color: var(--brand);
        -webkit-text-fill-color: var(--brand);
        flex-shrink: 0;
    }

    #ss-widget-header .ss-widget-actions a {
        color: var(--text-muted);
        margin-inline-start: 12px;
        cursor: pointer;
        text-decoration: none;
        font-size: 1.15rem;
    }

    #ss-widget-form {
        display: flex;
        gap: 8px;
        padding: 10px 14px;
        flex-shrink: 0;
    }

    #ss-widget-form input[type="text"],
    #ss-widget-form input[type="submit"] {
        box-sizing: border-box;
        height: 38px;
        font-size: 0.95rem;
        border-radius: 8px;
        border: 1px solid var(--border-gold);
    }

    #ss-widget-query {
        flex: 1;
        padding: 0 12px;
        background: var(--card-inner);
        color: inherit;
    }

    #ss-widget-form input[type="submit"] {
        padding: 0 16px;
        background: var(--card-inner);
        color: var(--brand);
        -webkit-text-fill-color: var(--brand);
        font-weight: 600;
        white-space: nowrap;
        cursor: pointer;
        transition: background 0.2s ease;
    }

    #ss-widget-form input[type="submit"]:hover {
        background: var(--card-nested);
    }

    #ss-widget-status {
        padding: 0 14px 10px;
        color: var(--text-muted);
        font-size: 0.9rem;
        display: none;
        flex-shrink: 0;
    }

    #ss-widget-results {
        overflow-y: auto;
        padding: 0 14px 14px;
        flex: 1;
    }

    .ss-widget-result {
        margin-bottom: 12px;
        padding: 10px 12px;
        border: 1px solid var(--border-gold);
        border-radius: 10px;
    }

    .ss-widget-result a.ss-widget-result-title {
        font-weight: 600;
        font-size: 0.98rem;
        color: var(--brand);
        -webkit-text-fill-color: var(--brand);
    }

    .ss-widget-verses {
        margin-top: 6px;
        color: var(--text-muted);
        font-size: 0.88rem;
        line-height: 1.9;
    }

    .ss-widget-couplet {
        display: flex;
        justify-content: space-between;
        gap: 10px;
        padding: 2px 0;
    }

    .ss-widget-scope-note {
        text-align: center;
        color: var(--gold, var(--text-muted));
        font-size: 0.85rem;
        margin-bottom: 10px;
    }

    .ss-widget-scope-clear {
        color: var(--brand);
        -webkit-text-fill-color: var(--brand);
        text-decoration: underline dotted;
        cursor: pointer;
    }
</style>

<a href="javascript:void(0);" id="ss-widget-launcher" title="جستجوی معنایی — پیدا کردن شعر با توصیف معنای آن" onclick="ssWidgetOpen()">
    <svg height="24px" viewBox="0 -960 960 960" width="24px" fill="var(--gold, currentColor)">
        <path d="M240-400h480v-80H240v80Zm0-120h480v-80H240v80Zm0-120h480v-80H240v80ZM80-80v-720q0-33 23.5-56.5T160-880h640q33 0 56.5 23.5T880-800v480q0 33-23.5 56.5T800-240H240L80-80Zm126-240h594v-480H160v525l46-45Zm-46 0v-480 480Z" />
    </svg>
</a>

<div id="ss-widget-backdrop" style="display:none;" onclick="ssWidgetUnmaximize()"></div>

<div id="ss-widget-panel" style="display:none;">
    <div id="ss-widget-header">
        <span>جستجوی معنایی</span>
        <div class="ss-widget-actions">
            <a href="javascript:void(0);" id="ss-widget-maximize-btn" onclick="ssWidgetToggleMaximize()" title="بزرگ‌نمایی">⤢</a>
            <a href="javascript:void(0);" onclick="ssWidgetClose()" title="بستن">×</a>
        </div>
    </div>
    <form id="ss-widget-form" onsubmit="return ssWidgetSubmit(event);">
        <input type="text" id="ss-widget-query" placeholder="مثلاً: شعری در مورد بی‌وفایی دنیا" autocomplete="off" />
        <input type="submit" value="جستجو" />
    </form>
    <div id="ss-widget-status"></div>
    <div id="ss-widget-results"></div>
</div>

<script>
    var ssWidgetApiRoot = "@APIRoot.SemanticSearchUrl";
    var ssWidgetMaximized = false;
    var ssWidgetLastQuery = ""; // the last SUBMITTED query, for the "search globally instead" link

    function ssWidgetOpen() {
        document.getElementById("ss-widget-launcher").style.display = "none";
        document.getElementById("ss-widget-panel").style.display = "flex";
        document.getElementById("ss-widget-query").focus();
    }

    function ssWidgetClose() {
        document.getElementById("ss-widget-launcher").style.display = "inline-flex";
        document.getElementById("ss-widget-panel").style.display = "none";
        ssWidgetUnmaximize();
    }

    function ssWidgetToggleMaximize() {
        if (ssWidgetMaximized) {
            ssWidgetUnmaximize();
        } else {
            ssWidgetMaximized = true;
            document.getElementById("ss-widget-panel").classList.add("ss-widget-maximized");
            document.getElementById("ss-widget-backdrop").style.display = "block";
            document.getElementById("ss-widget-maximize-btn").textContent = "⤡";
            document.getElementById("ss-widget-maximize-btn").title = "بازگشت به حالت کوچک";
        }
    }

    function ssWidgetUnmaximize() {
        ssWidgetMaximized = false;
        document.getElementById("ss-widget-panel").classList.remove("ss-widget-maximized");
        document.getElementById("ss-widget-backdrop").style.display = "none";
        document.getElementById("ss-widget-maximize-btn").textContent = "⤢";
        document.getElementById("ss-widget-maximize-btn").title = "بزرگ‌نمایی";
    }

    function ssWidgetSubmit(e) {
        e.preventDefault();
        var query = document.getElementById("ss-widget-query").value.trim();
        if (!query) return false;
        ssWidgetLastQuery = query;
        ssWidgetRunSearch(query, false);
        return false;
    }

    // "search globally instead" - the escape hatch for when auto-detection guesses wrong.
    // Reuses the last SUBMITTED query, not whatever's currently sitting in the input box
    // (which the user may have started editing without resubmitting).
    function ssWidgetSearchGlobally() {
        if (!ssWidgetLastQuery) return;
        ssWidgetRunSearch(ssWidgetLastQuery, true);
    }

    function ssWidgetRunSearch(query, disableScopeDetection) {
        var resultsEl = document.getElementById("ss-widget-results");
        var statusEl = document.getElementById("ss-widget-status");
        resultsEl.innerHTML = "";
        statusEl.style.display = "block";
        statusEl.textContent = "در حال جستجو...";

        $.ajax({
            type: "POST",
            url: ssWidgetApiRoot + "/api/diwan/search/semantic",
            contentType: "application/json",
            data: JSON.stringify({ query: query, topK: 10, disableScopeDetection: !!disableScopeDetection }),
            success: function (response) {
                statusEl.style.display = "none";
                ssWidgetRenderResults(response);
            },
            error: function (xhr) {
                statusEl.style.display = "block";
                if (xhr.status === 503) {
                    statusEl.textContent = "در حال حاضر جستجوی معنایی در دسترس نیست. لطفاً کمی بعد دوباره امتحان کنید.";
                } else if (xhr.responseText) {
                    statusEl.textContent = "خطا: " + xhr.responseText;
                } else {
                    statusEl.textContent = "خطایی رخ داد (کد " + xhr.status + "). لطفاً دوباره تلاش کنید.";
                }
            }
        });
    }

    function ssWidgetRenderResults(response) {
        var resultsEl = document.getElementById("ss-widget-results");
        var statusEl = document.getElementById("ss-widget-status");

        if (!response || !response.results || response.results.length === 0) {
            statusEl.style.display = "block";
            statusEl.textContent = "نتیجه‌ای پیدا نشد.";
            return;
        }

        var html = "";
        if (response.detectedPoetName || response.detectedCategoryName) {
            var scopeText = [response.detectedPoetName, response.detectedCategoryName].filter(Boolean).join(" » ");
            html += '<p class="ss-widget-scope-note">نتایج محدود به: ' + ssWidgetEscapeHtml(scopeText) +
                ' <a href="javascript:void(0);" onclick="ssWidgetSearchGlobally()" class="ss-widget-scope-clear">(جستجوی سراسری)</a></p>';
        }

        response.results.forEach(function (item, index) {
            var rank = index + 1;
            html += '<div class="ss-widget-result">';
            html += '<a class="ss-widget-result-title" href="' + ssWidgetEscapeHtml(item.fullUrl) + '" onclick="ssWidgetReportClick(' +
                JSON.stringify(response.logId) + ',' + JSON.stringify(item.poemId) + ',' + rank + ')">' +
                ssWidgetEscapeHtml(item.fullTitle || item.title) + '</a>';
            html += ssWidgetRenderVerses(item.verses);
            html += '</div>';
        });

        resultsEl.innerHTML = html;
    }

    // Fire-and-forget - does not preventDefault or delay navigation in any way, just queues the
    // click report in the background while the browser proceeds to the poem page normally.
    // sendBeacon is specifically designed for "report something right as the page is about to
    // unload" - a plain fetch can get cancelled mid-flight by the navigation; sendBeacon (or a
    // keepalive fetch as fallback for older browsers) doesn't have that problem.
    function ssWidgetReportClick(logId, poemId, rank) {
        if (!logId) return; // the search itself failed to log - nothing to correlate a click to

        var payload = JSON.stringify({ logId: logId, poemId: poemId, rank: rank });
        var url = ssWidgetApiRoot + "/api/diwan/search/semantic/click";

        if (navigator.sendBeacon) {
            navigator.sendBeacon(url, new Blob([payload], { type: "application/json" }));
        } else {
            fetch(url, {
                method: "POST",
                headers: { "Content-Type": "application/json" },
                body: payload,
                keepalive: true
            }).catch(function () { });
        }
    }

    // Same hemistich-pairing logic as mini-diwan's renderVerses (https://ganjoor.github.io/mini/)
    // and SemanticSearch.cshtml - reused as-is rather than reinvented a third time.
    function ssWidgetRenderVerses(verses) {
        if (!verses || verses.length === 0) return "";

        var out = [];
        var i = 0;
        while (i < verses.length) {
            var v = verses[i];
            if (v.position === "Right" && verses[i + 1] && verses[i + 1].position === "Left") {
                out.push(
                    '<div class="ss-widget-couplet">' +
                    '<div style="flex:1;">' + ssWidgetEscapeHtml(v.text) + '</div>' +
                    '<div style="flex:1;">' + ssWidgetEscapeHtml(verses[i + 1].text) + '</div>' +
                    '</div>'
                );
                i += 2;
            } else {
                out.push('<div style="padding:2px 0;">' + ssWidgetEscapeHtml(v.text) + '</div>');
                i += 1;
            }
        }
        return '<div class="ss-widget-verses">' + out.join("") + '</div>';
    }

    function ssWidgetEscapeHtml(s) {
        if (s == null) return "";
        return String(s).replace(/[&<>"']/g, function (c) {
            return { "&": "&amp;", "<": "&lt;", ">": "&gt;", '"': "&quot;", "'": "&#39;" }[c];
        });
    }
</script>