// Copyright (C) 2026 Danilo M. <danix@danix.xyz>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2 as
// published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.

import Quickshell
import Quickshell.Io
import Quickshell.Widgets
import Quickshell.Services.Pipewire
import QtQuick
import ".."
import "Logic.js" as Logic

// The Sony headphones: battery, noise control tiles and ambient level
// through sonyctl, the headphones' own volume, power off and refresh.
// Battery is BlueZ's and volume PipeWire's; only the mode needs the Sony
// protocol. Glyphs are Material Design codepoints checked against the
// Inconsolata Nerd Font cmap (AGENTS.md).
Column {
    id: panel

    required property var device        // the connected BluetoothDevice
    property bool open: false
    signal close()

    readonly property string sonyctl: Qt.resolvedUrl("sonyctl").toString().replace(/^file:\/\//, "")
    property string mode: ""            // "nc", "ambient", "off"; "" until read
    property int level: 10
    property bool voice: false
    property bool busy: false
    property string error: ""

    // The headphones' sink rather than the default one, so the slider is
    // theirs even while another output is selected.
    readonly property PwNode sink: {
        const prefix = "bluez_output." + (device?.address ?? "").replace(/:/g, "_");
        return Pipewire.nodes.values.find(n => n.name.startsWith(prefix)) ?? null;
    }
    readonly property var audio: sink?.audio ?? null
    PwObjectTracker { objects: panel.sink ? [panel.sink] : [] }

    readonly property real battery: device?.batteryAvailable ? device.battery : -1

    function glyph(cp) { return String.fromCodePoint(cp); }

    // Read on every open: the headphones' own button changes the mode too,
    // and nothing pushes it here.
    onOpenChanged: if (open) run(["status"])

    // One run at a time: each opens its own RFCOMM link, and a second one
    // while the first is up is refused by the headphones. A fresh Process per
    // run (a running one ignores another start, AGENTS.md).
    function run(args) {
        if (busy || !device) return;
        busy = true;
        op.createObject(panel, { command: [sonyctl, device.address].concat(args) }).running = true;
    }

    Component {
        id: op
        Process {
            id: proc
            stdout: StdioCollector {
                onStreamFinished: {
                    let r;
                    try { r = JSON.parse(text); }
                    catch (e) { r = { ok: false, error: "sonyctl: " + (text.trim() || "no output") }; }
                    panel.error = r.ok ? "" : r.error;
                    if (r.ok && r.mode) { panel.mode = r.mode; panel.level = r.level; panel.voice = r.voice; }
                    panel.busy = false;
                    proc.destroy();
                }
            }
        }
    }

    // The ambient level is sent once the slider or wheel settles: each set
    // is a ~2s round trip, and a send per wheel notch would queue up.
    property int pendingLevel: -1
    readonly property int shownLevel: pendingLevel > 0 ? pendingLevel : level
    Timer {
        id: levelSend
        interval: 500
        onTriggered: {
            const v = panel.pendingLevel;
            if (panel.busy) { restart(); return; }
            panel.pendingLevel = -1;
            if (v > 0 && v !== panel.level) { panel.level = v; panel.run(["ambient", String(v)]); }
        }
    }

    spacing: 14

    // --- header ----------------------------------------------------------

    Item {
        width: panel.width
        height: 26

        Text {
            id: headGlyph
            anchors.verticalCenter: parent.verticalCenter
            text: panel.glyph(0xF02CB)  // md-headphones
            font { family: Theme.iconFamily; pixelSize: 22 }
            color: Theme.accent
        }

        Rectangle {
            id: headSep
            anchors { left: headGlyph.right; leftMargin: 10; verticalCenter: parent.verticalCenter }
            width: 1
            height: 18
            color: Qt.alpha(Theme.text, 0.15)
        }

        Text {
            anchors {
                left: headSep.right; leftMargin: 10; right: closeGlyph.left; rightMargin: 8
                verticalCenter: parent.verticalCenter
            }
            elide: Text.ElideRight
            text: (panel.device?.deviceName || panel.device?.name || "Headphones").toUpperCase()
            font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 1; letterSpacing: 2 }
            color: Theme.text
        }

        Text {
            id: closeGlyph
            anchors { right: parent.right; verticalCenter: parent.verticalCenter }
            text: panel.glyph(0xF0156)  // md-close
            font { family: Theme.iconFamily; pixelSize: 18 }
            color: closeHit.containsMouse ? Theme.text : Theme.subtext

            MouseArea {
                id: closeHit
                anchors { fill: parent; margins: -4 }
                hoverEnabled: true
                cursorShape: Qt.PointingHandCursor
                onClicked: panel.close()
            }
        }
    }

    // --- battery ---------------------------------------------------------

    Row {
        visible: panel.battery >= 0
        width: panel.width
        spacing: 10

        Text {
            id: batGlyph
            anchors.verticalCenter: parent.verticalCenter
            // md-battery_10 .. md-battery_90 are consecutive, md-battery is full.
            text: panel.glyph(panel.battery >= 0.95 ? 0xF0079
                : 0xF007A + Math.max(0, Math.min(8, Math.round(panel.battery * 10) - 1)))
            font { family: Theme.iconFamily; pixelSize: 20 }
            color: batBar.tint
        }

        Rectangle {
            id: batBar
            readonly property color tint: panel.battery < 0.2 ? Theme.red : Theme.accent
            anchors.verticalCenter: parent.verticalCenter
            width: parent.width - batGlyph.width - batPct.width - parent.spacing * 2
            height: 8
            radius: 4
            color: Theme.surface

            Rectangle {
                height: parent.height
                radius: parent.radius
                width: parent.width * Math.max(0, panel.battery)
                color: batBar.tint
            }
        }

        Text {
            id: batPct
            anchors.verticalCenter: parent.verticalCenter
            width: 44
            horizontalAlignment: Text.AlignRight
            text: Math.round(panel.battery * 100) + "%"
            font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 1; bold: true }
            color: batBar.tint
        }
    }

    // --- noise control ---------------------------------------------------

    Text {
        text: "NOISE CONTROL"
        font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 5; bold: true; letterSpacing: 1.5 }
        color: Theme.accent
    }

    Row {
        id: tiles
        spacing: 8

        Repeater {
            model: [
                { id: "nc", label: "ANC", cp: 0xF147D },          // md-waveform
                { id: "ambient", label: "Ambient", cp: 0xF05CB }, // md-account_voice
                { id: "off", label: "Off", cp: 0xF073A }          // md-cancel
            ]

            delegate: Rectangle {
                id: tile
                required property var modelData
                readonly property bool current: panel.mode === modelData.id
                width: (panel.width - tiles.spacing * 2) / 3
                height: 84
                radius: 12
                color: current ? Qt.alpha(Theme.accent, 0.14)
                     : tileHit.containsMouse ? Qt.alpha(Theme.surface, 0.8) : Qt.alpha(Theme.surface, 0.4)
                border.width: current ? 1.5 : 1
                border.color: current ? Theme.accent : Qt.alpha(Theme.text, 0.1)
                opacity: panel.busy && !current ? 0.6 : 1

                Column {
                    anchors.centerIn: parent
                    spacing: 6

                    Text {
                        anchors.horizontalCenter: parent.horizontalCenter
                        text: panel.glyph(tile.modelData.cp)
                        font { family: Theme.iconFamily; pixelSize: 26 }
                        color: tile.current ? Theme.accent : Theme.text
                    }

                    Text {
                        anchors.horizontalCenter: parent.horizontalCenter
                        text: tile.modelData.label
                        font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 3 }
                        color: tile.current ? Theme.text : Theme.subtext
                    }

                    Rectangle {
                        anchors.horizontalCenter: parent.horizontalCenter
                        width: 6
                        height: 6
                        radius: 3
                        color: tile.current ? Theme.accent : Theme.overlay
                    }
                }

                MouseArea {
                    id: tileHit
                    anchors.fill: parent
                    hoverEnabled: true
                    enabled: !panel.busy && !tile.current
                    cursorShape: Qt.PointingHandCursor
                    onClicked: panel.run([tile.modelData.id])
                }
            }
        }
    }

    // --- sliders ---------------------------------------------------------

    // Ambient level 1-20, while in ambient mode. Wheel or drag, sent once it
    // settles (levelSend above).
    Slider {
        visible: panel.mode === "ambient"
        cp: 0xF07C5  // md-ear_hearing
        value: panel.shownLevel / 20
        label: String(panel.shownLevel)
        onMoved: v => { panel.pendingLevel = Math.max(1, Math.min(20, Math.round(v * 20))); levelSend.restart(); }
        onStepped: d => {
            panel.pendingLevel = Math.max(1, Math.min(20, panel.shownLevel + d));
            levelSend.restart();
        }
    }

    // Focus on voice, an ambient-only flag: the headphones keep it in the
    // other modes but it does nothing there.
    Item {
        visible: panel.mode === "ambient"
        width: panel.width
        height: voiceSwitch.height

        Text {
            id: voiceGlyph
            anchors.verticalCenter: parent.verticalCenter
            text: panel.glyph(0xF1308)  // md-account_tie_voice
            font { family: Theme.iconFamily; pixelSize: 20 }
            color: Theme.subtext
        }

        Text {
            anchors { left: voiceGlyph.right; leftMargin: 10; verticalCenter: parent.verticalCenter }
            text: "Focus on voice"
            font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 2 }
            color: Theme.text
        }

        Switch {
            id: voiceSwitch
            anchors { right: parent.right; verticalCenter: parent.verticalCenter }
            enabled: !panel.busy
            checked: panel.voice
            onToggled: on => panel.run(["voice", on ? "on" : "off"])
        }
    }

    // The headphones' volume; the icon mutes, the wheel steps 5%.
    Slider {
        enabled: panel.audio !== null
        icon: Logic.volumeIcon(panel.audio?.volume ?? 0, panel.audio?.muted ?? false)
        value: panel.audio?.volume ?? 0
        muted: panel.audio?.muted ?? false
        label: !panel.audio ? "—" : panel.audio.muted ? "muted" : Math.round(panel.audio.volume * 100) + "%"
        onIconClicked: panel.audio.muted = !panel.audio.muted
        onMoved: v => panel.audio.volume = v
        onStepped: d => panel.audio.volume = Math.max(0, Math.min(1, panel.audio.volume + d * 0.05))
    }

    Text {
        visible: panel.error !== ""
        width: panel.width
        wrapMode: Text.Wrap
        text: panel.error
        font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 4 }
        color: Theme.red
    }

    // --- footer ----------------------------------------------------------

    Rectangle {
        width: panel.width
        height: 1
        color: Qt.alpha(Theme.text, 0.1)
    }

    Row {
        id: footer
        width: panel.width

        Repeater {
            model: [
                { label: "Power off", cp: 0xF0425, tint: "red", args: ["poweroff"] },  // md-power
                { label: "Refresh", cp: 0xF0450, tint: "text", args: ["status"] }      // md-refresh
            ]

            delegate: Item {
                id: action
                required property var modelData
                required property int index
                width: footer.width / 2
                height: 36

                Rectangle {
                    id: actionBox
                    anchors { left: parent.left; leftMargin: action.index ? 12 : 0; verticalCenter: parent.verticalCenter }
                    width: 36
                    height: 36
                    radius: 10
                    color: actionHit.containsMouse ? Qt.alpha(Theme[action.modelData.tint], 0.18)
                                                   : Qt.alpha(Theme.surface, 0.6)
                    border.width: 1
                    border.color: Qt.alpha(Theme[action.modelData.tint], 0.25)

                    Text {
                        id: actionGlyph
                        anchors.centerIn: parent
                        text: panel.glyph(action.modelData.cp)
                        font { family: Theme.iconFamily; pixelSize: 20 }
                        color: Theme[action.modelData.tint]
                        // The refresh glyph turns while sonyctl runs.
                        RotationAnimation on rotation {
                            running: panel.busy && action.index === 1
                            from: 0; to: 360; duration: 900; loops: Animation.Infinite
                            onStopped: actionGlyph.rotation = 0
                        }
                    }
                }

                Text {
                    anchors { left: actionBox.right; leftMargin: 10; verticalCenter: parent.verticalCenter }
                    text: action.modelData.label
                    font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 2 }
                    color: Theme.text
                }

                Rectangle {
                    visible: action.index === 1
                    anchors { left: parent.left; verticalCenter: parent.verticalCenter }
                    width: 1
                    height: 22
                    color: Qt.alpha(Theme.text, 0.15)
                }

                MouseArea {
                    id: actionHit
                    anchors.fill: parent
                    hoverEnabled: true
                    enabled: !panel.busy
                    cursorShape: Qt.PointingHandCursor
                    onClicked: panel.run(action.modelData.args)
                }
            }
        }
    }

    // One slider row: a glyph (cp) or a named icon (icon), a track, a label.
    // moved(v) gives 0..1 from a click or drag; stepped(+1|-1) one wheel notch.
    component Slider: Row {
        id: row
        property int cp: 0
        property string icon: ""
        property real value: 0
        property bool muted: false
        property string label: ""
        signal moved(real v)
        signal stepped(int d)
        signal iconClicked()

        width: panel.width
        spacing: 10

        Item {
            anchors.verticalCenter: parent.verticalCenter
            width: 20
            height: 20

            Text {
                visible: row.icon === ""
                anchors.centerIn: parent
                text: panel.glyph(row.cp)
                font { family: Theme.iconFamily; pixelSize: 20 }
                color: Theme.subtext
            }

            IconImage {
                visible: row.icon !== ""
                anchors.centerIn: parent
                implicitSize: 18
                source: row.icon !== "" ? Quickshell.iconPath(row.icon, true) : ""
            }

            MouseArea {
                anchors.fill: parent
                enabled: row.enabled
                cursorShape: Qt.PointingHandCursor
                onClicked: row.iconClicked()
            }
        }

        Rectangle {
            anchors.verticalCenter: parent.verticalCenter
            width: row.width - 20 - 44 - row.spacing * 2
            height: 8
            radius: 4
            color: Theme.surface

            Rectangle {
                height: parent.height
                radius: parent.radius
                width: parent.width * Math.max(0, Math.min(1, row.value))
                color: row.muted ? Theme.red : Theme.accent
                opacity: row.muted ? 0.5 : 1
            }

            // Taller than the track so it is easy to hit. A MouseArea for the
            // wheel, not a WheelHandler (AGENTS.md); one step per notch (120),
            // since a touchpad sends many small deltas.
            MouseArea {
                anchors { fill: parent; topMargin: -8; bottomMargin: -8 }
                enabled: row.enabled
                preventStealing: true
                cursorShape: Qt.PointingHandCursor
                property real acc: 0
                function at(x) { return Math.max(0, Math.min(1, x / width)); }
                onPressed: mouse => row.moved(at(mouse.x))
                onPositionChanged: mouse => { if (pressed) row.moved(at(mouse.x)); }
                onWheel: wheel => {
                    acc += wheel.angleDelta.y;
                    while (Math.abs(acc) >= 120) {
                        row.stepped(acc > 0 ? 1 : -1);
                        acc -= acc > 0 ? 120 : -120;
                    }
                    wheel.accepted = true;
                }
            }
        }

        Text {
            anchors.verticalCenter: parent.verticalCenter
            width: 44
            horizontalAlignment: Text.AlignRight
            text: row.label
            font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 2 }
            color: row.muted ? Theme.red : Theme.subtext
        }
    }
}