pragma ComponentBehavior: Bound

import QtQuick
import QtQuick.Layouts

import qs.hyprchrome.theme
import qs.hyprchrome.widgets.panels
import qs.widgets.vitals

// Host vitals in the hyprchrome panel chrome, in both of BarPanel's densities.
//
// Expanded: CPU load and temperature, memory usage, GPU load and temperature,
// each as a segmented meter with its readout.
// Collapsed: the same five numbers as percentages behind Nerd Font glyphs.
//
// Both bodies read the same properties below, so the two densities cannot
// disagree — they are one set of numbers rendered twice.
//
// The scrape comes from the shared VitalsData (node_exporter over loopback);
// GPU busy is the one reading that scrape does not carry, so it comes off
// sysfs through GpuBusy.
BarPanel {
    id: panel

    panelId: "MON"
    title: "RESOURCE MONITOR"
    meta: vitals.failed ? "OFFLINE" : vitals.ready ? "REALTIME" : "PRIMING"

    // Poll only while the panel exists on screen; both sources idle otherwise.
    property bool polling: true

    // Temperatures are metered against a 0–100 °C span so a bar means the same
    // thing on every row.
    readonly property real tempCeiling: 100

    readonly property real memoryFraction: vitals.memTotal > 0 ? vitals.memUsed / vitals.memTotal : 0
    readonly property bool cpuTempReady: isFinite(vitals.cpuTemp)
    readonly property bool gpuTempReady: isFinite(vitals.gpuTemp)

    function pct(value, ready) {
        return ready ? Math.round(Math.max(0, Math.min(1, value)) * 100) + "%" : "--";
    }

    function tempFraction(celsius) {
        return isFinite(celsius) ? Math.max(0, Math.min(1, celsius / panel.tempCeiling)) : 0;
    }

    VitalsData {
        id: vitals
        active: panel.polling
    }

    GpuBusy {
        id: gpu
        active: panel.polling
    }

    // Collapsed: glyph + percentage, in the same order as the rows below.
    // Codepoints are Nerd Fonts v3 — oct-cpu, fa-thermometer-half,
    // md-memory, md-expansion-card-variant — all present in DepartureMono.
    summary: RowLayout {
        spacing: 12

        Item { Layout.fillWidth: true }
        Readout { icon: "CPU:"; value: panel.pct(vitals.cpu, vitals.ratesReady) }
        Readout { icon: "CPU Temp:"; value: vitals.fmtTemp(vitals.cpuTemp) }
        Readout { icon: "Mem:"; value: panel.pct(panel.memoryFraction, vitals.ready) }
        Readout { icon: "GPU:"; value: panel.pct(gpu.value, gpu.ready) }
        Readout { icon: "GPU Temp:"; value: vitals.fmtTemp(vitals.gpuTemp) }
        Item { Layout.fillWidth: true }
    }

    // Expanded: the same five, metered.
    Column {
        width: parent.width
        spacing: 5

        VitalRow {
            width: parent.width
            label: "CPU"
            value: vitals.cpu
            ready: vitals.ratesReady && !vitals.failed
            readout: panel.pct(vitals.cpu, vitals.ratesReady)
        }

        VitalRow {
            width: parent.width
            label: "CPU TMP"
            value: panel.tempFraction(vitals.cpuTemp)
            ready: panel.cpuTempReady
            readout: vitals.fmtTemp(vitals.cpuTemp)
            warn: 0.85
        }

        VitalRow {
            width: parent.width
            label: "MEM"
            value: panel.memoryFraction
            ready: vitals.ready && !vitals.failed
            readout: panel.pct(panel.memoryFraction, vitals.ready)
        }

        VitalRow {
            width: parent.width
            label: "GPU"
            value: gpu.value
            ready: gpu.ready
            readout: panel.pct(gpu.value, gpu.ready)
        }

        VitalRow {
            width: parent.width
            label: "GPU TMP"
            value: panel.tempFraction(vitals.gpuTemp)
            ready: panel.gpuTempReady
            readout: vitals.fmtTemp(vitals.gpuTemp)
            warn: 0.85
        }
    }

    component Readout: Row {
        property string icon: ""
        property string value: "--"

        spacing: 4

        Text {
            text: parent.icon
            color: Theme.accent
            font.family: Theme.displayFont
            font.pixelSize: 12
        }

        Text {
            text: parent.value
            color: Theme.text
            font.family: Theme.displayFont
            font.pixelSize: 12
            font.bold: true
        }
    }
}