"use strict";
(() => {
    let loading = false, lastData = null, activeTab = "overview";
    const chartPalette = ["var(--chart-accent)", "var(--chart-secondary)", "var(--chart-tertiary)", "var(--chart-quaternary)", "var(--chart-quinary)", "var(--chart-senary)", "var(--chart-septenary)", "var(--chart-octonary)"];
    const scope = () => $("traffic-scope")?.value || "*";
    const number = value => fmt(Number(value) || 0);

    function selectTab(name) {
        activeTab = name;
        document.querySelectorAll("[data-traffic-tab]").forEach(button => {
            const active = button.dataset.trafficTab === name;
            button.classList.toggle("active", active);
            button.setAttribute("aria-selected", String(active));
            button.tabIndex = active ? 0 : -1;
        });
        document.querySelectorAll("[data-traffic-page]").forEach(page => { page.hidden = page.dataset.trafficPage !== name; });
    }

    function configure(data) {
        const selected = scope(), options = [el("option", t("logAllVhosts"))];
        options[0].value = "*";
        for (const vhost of data.vhosts || []) {
            const option = el("option", `${vhost.id} / ${(vhost.hosts || []).join(", ")}`);
            option.value = vhost.id; options.push(option);
        }
        $("traffic-scope").replaceChildren(...options);
        $("traffic-scope").value = options.some(option => option.value === selected) ? selected : "*";
    }

    function chartEntries(entries, enabled = true) {
        return (enabled ? (entries || []) : []).filter(item => Number(item.count) > 0);
    }

    function renderDonut(id, entries, enabled = true) {
        const chart = $(`traffic-chart-${id}`), legend = $(`traffic-chart-${id}-legend`), totalNode = $(`traffic-chart-${id}-total`);
        if (!chart || !legend || !totalNode) return;
        const empty = $(`traffic-chart-${id}-empty`), values = chartEntries(entries, enabled);
        const total = values.reduce((sum, item) => sum + Number(item.count || 0), 0);
        totalNode.textContent = number(total); if (empty) empty.hidden = total > 0;
        if (!total) {
            chart.style.background = "var(--chart-surface)"; chart.setAttribute("aria-label", t("trafficNoData"));
            legend.replaceChildren(el("li", t("trafficNoData"), "fine")); return;
        }
        const shown = values.slice(0, 7).map(item => ({ value: item.value || "-", count: Number(item.count) || 0 }));
        if (values.length > shown.length) shown.push({ value: t("trafficOther"), count: values.slice(shown.length).reduce((sum, item) => sum + Number(item.count || 0), 0) });
        let cursor = 0;
        chart.style.background = `conic-gradient(${shown.map((item, index) => {
            const start = cursor / total * 100; cursor += item.count; const end = cursor / total * 100;
            return `${chartPalette[index % chartPalette.length]} ${start.toFixed(4)}% ${end.toFixed(4)}%`;
        }).join(", ")})`;
        const heading = chart.closest(".traffic-chart-card")?.querySelector("h3")?.textContent || t("trafficDimensionsTitle");
        chart.setAttribute("aria-label", `${heading}: ${shown.map(item => `${item.value} ${Math.round(item.count / total * 100)}%`).join(", ")}`);
        legend.replaceChildren(...shown.map((item, index) => {
            const row = el("li"), label = el("span"), swatch = el("i", undefined, "traffic-chart-swatch");
            swatch.style.background = chartPalette[index % chartPalette.length];
            const text = el("span", item.value || "-", "traffic-chart-label"); text.title = item.value || "-";
            label.append(swatch, text); row.append(label, el("b", `${(item.count / total * 100).toFixed(1)}%`)); return row;
        }));
    }

    function renderBars(id, entries, enabled = true, formatter = number) {
        const chart = $(`traffic-chart-${id}`); if (!chart) return;
        const empty = $(`traffic-chart-${id}-empty`), values = chartEntries(entries, enabled).slice(0, 12);
        const total = values.reduce((sum, item) => sum + Number(item.count || 0), 0), peak = Math.max(1, ...values.map(item => Number(item.count) || 0));
        if (empty) empty.hidden = values.length > 0;
        chart.replaceChildren(...values.map(item => {
            const count = Number(item.count) || 0, row = el("div", undefined, "traffic-bar-row");
            const label = el("span", item.value || "-", "traffic-bar-label"); label.title = item.value || "-";
            const track = el("span", undefined, "traffic-bar-track"), fill = el("i", undefined, "traffic-bar-fill"); fill.style.width = `${Math.max(1.5, count / peak * 100)}%`; track.append(fill);
            const value = el("span", formatter(count), "traffic-bar-value"); value.title = total ? `${(count / total * 100).toFixed(1)}%` : "";
            row.append(label, track, value); return row;
        }));
        chart.setAttribute("aria-label", values.length ? values.map(item => `${item.value}: ${formatter(Number(item.count) || 0)}`).join(", ") : t("trafficNoData"));
    }

    function render(data) {
        lastData = data; configure(data);
        const analytics = data.analytics || {}, stats = analytics.data || {}, settings = data.settings || {};
        $("traffic-requests").textContent = number(stats.requests); $("traffic-errors").textContent = number(stats.errors);
        const requests = Number(stats.requests) || 0, errors = Number(stats.errors) || 0;
        $("traffic-error-ratio").textContent = `${requests ? (errors / requests * 100).toFixed(2) : "0.00"}%`;
        $("traffic-response-bytes").textContent = fmtBytes(Number(stats.response_bytes) || 0);
        $("traffic-request-bytes").textContent = `${t("trafficRequestBytes")}: ${fmtBytes(Number(stats.request_bytes) || 0)}`;
        $("traffic-latency").textContent = stats.mean_duration_ms == null ? "-" : `${fmt(stats.mean_duration_ms, 2)} ms`;
        $("traffic-dropped").textContent = `${t("trafficDroppedSamples")}: ${number(analytics.queue_dropped)}`;
        const capture = [settings.capture_user_agent ? t("trafficUserAgentEnabled") : t("trafficUserAgentDisabled")];
        capture.push(settings.capture_country ? (data.geoip?.loaded ? t("trafficCountryEnabled") : t("trafficCountryNoDb")) : t("trafficCountryDisabled"));
        $("traffic-capture-status").textContent = capture.join(" · ");

        renderDonut("countries", stats.countries, !!settings.capture_country);
        renderBars("user-agents", stats.user_agents, !!settings.capture_user_agent);
        renderBars("client-ips", stats.client_ips);
        renderBars("paths", stats.paths); renderBars("routes", stats.routes);
        renderDonut("methods", stats.methods); renderDonut("methods-detail", stats.methods);
        renderDonut("statuses", stats.statuses); renderDonut("statuses-detail", stats.statuses);
        renderDonut("cache", stats.cache); renderDonut("cache-detail", stats.cache);
        renderBars("volume", [
            { value: t("trafficRequestBytes"), count: Number(stats.request_bytes) || 0 },
            { value: t("trafficResponseBytes"), count: Number(stats.response_bytes) || 0 },
        ], true, fmtBytes);
        $("traffic-panel-state").textContent = `${t("trafficUpdated")}: ${formatTime(new Date())}`;
    }

    async function loadTraffic({ signal, isCurrent }) {
        if (!authenticated || currentPanel !== "traffic" || loading) return;
        loading = true;
        try {
            const data = await api(`/api/traffic?vhost=${encodeURIComponent(scope())}`, { signal });
            if (isCurrent()) render(data);
        } catch (error) {
            if (error?.name !== "AbortError" && isCurrent()) $("traffic-panel-state").textContent = error.message;
        } finally { loading = false; }
    }
    function refresh() { return rustProxyRefresh.manual("traffic"); }

    function reset() {
        lastData = null; if ($("traffic-panel-state")) $("traffic-panel-state").textContent = "";
        document.querySelectorAll(".traffic-bar-chart").forEach(chart => chart.replaceChildren());
        for (const id of ["countries", "methods", "methods-detail", "statuses", "statuses-detail", "cache", "cache-detail"]) {
            const chart = $(`traffic-chart-${id}`), legend = $(`traffic-chart-${id}-legend`), total = $(`traffic-chart-${id}-total`);
            if (chart) chart.style.background = "var(--chart-surface)"; legend?.replaceChildren(); if (total) total.textContent = "-";
        }
        selectTab("overview");
    }

    document.querySelectorAll("[data-traffic-tab]").forEach(button => button.addEventListener("click", () => selectTab(button.dataset.trafficTab)));
    $("traffic-refresh")?.addEventListener("click", () => void refresh()); $("traffic-scope")?.addEventListener("change", () => void refresh());
    $("traffic-settings")?.addEventListener("click", () => { setPanel("settings"); window.rustProxySettings?.select("logging"); });
    rustProxyRefresh.register("traffic", {
        interval: () => rustProxyRefresh.current().traffic_seconds,
        active: () => currentPanel === "traffic" && !!$("traffic-live")?.checked,
        run: loadTraffic
    });
    $("traffic-live")?.addEventListener("change", () => rustProxyRefresh.sync());
    selectTab(activeTab);
    window.rustProxyTrafficPanel = { refresh, reset, rerender: () => lastData && render(lastData), select: selectTab };
})();