import QtQuick
import Quickshell
import Quickshell.Io
import Quickshell.Wayland
import qs.Commons
import qs.Ui
import "ClockModel.js" as Model

// A second bar along the bottom edge of every screen, carrying world clocks
// laid out as a single timeline: furthest behind local time at the far left,
// furthest ahead at the far right, local time dead centre.
//
// It is a `panel` plugin rather than a set of bar widgets because it is its
// own layer-shell surface — the built-in bar owns the top edge and only one
// bar plugin is active at a time, so sharing it was never an option. Being a
// separate surface also means it reserves its own space and survives
// `omarchy refresh shell` untouched.
Item {
  id: root

  // Injected by the shell host when the plugin is mounted.
  property string omarchyPath: ""
  property var shell: null
  property var manifest: null

  readonly property var config: configFile.config
  readonly property var bar: Model.buildBar(config, zones.offsets, root.nowMs, zones.localOffset)

  property double nowMs: Date.now()
  property int lastProbedHour: -1

  // Follows the theme's bar height unless the config pins one, so the two bars
  // stay the same weight when the theme or font size changes.
  readonly property int barSize: config && config.barSize > 0 ? config.barSize : Style.bar.sizeHorizontal

  readonly property color background: Color.bar.background
  readonly property color foreground: Color.bar.text
  readonly property color muted: Color.muted
  readonly property color accent: Color.accent
  readonly property color urgent: Color.urgent

  readonly property int edgePadding: Style.space(12)
  readonly property int clockGap: Style.space(16)
  readonly property int labelGap: Style.space(6)

  Config { id: configFile }

  Zones {
    id: zones
    zones: Model.zonesToProbe(root.config)
  }

  // Minute precision is all the display needs; seconds are opt-in because
  // ticking every second wakes the whole shell sixty times as often for a
  // readout nobody reads that closely.
  SystemClock {
    id: clock
    precision: root.config && root.config.showSeconds ? SystemClock.Seconds : SystemClock.Minutes
    onDateChanged: {
      root.nowMs = date.getTime()
      // Offsets only move at a transition, and transitions land on the hour.
      var hour = date.getHours()
      if (hour !== root.lastProbedHour) {
        root.lastProbedHour = hour
        zones.probe()
      }
    }
  }

  function openEditor() { editorLoader.active = true; if (editorLoader.item) editorLoader.item.open() }
  function closeEditor() { if (editorLoader.item) editorLoader.item.close() }
  readonly property bool editorOpen: editorLoader.item ? editorLoader.item.opened : false

  Loader {
    id: editorLoader
    active: false
    asynchronous: true
    source: Qt.resolvedUrl("Editor.qml")
    onLoaded: {
      item.configFile = configFile
      item.zones = zones
      item.open()
    }
  }

  IpcHandler {
    target: "nerdnation.clockbar"

    function edit(): void { root.openEditor() }
    function open(): void { root.openEditor() }
    function close(): void { root.closeEditor() }
    function toggle(): void { root.editorOpen ? root.closeEditor() : root.openEditor() }
    function refresh(): void { zones.probe() }
    function reload(): void { configFile.file.reload() }
  }

  // ------------------------------------------------------------- one clock

  component Clock: Row {
    id: entry

    required property var clock

    readonly property bool dimmed: root.config && root.config.dimOutsideWorkingHours
      && entry.clock.known && !entry.clock.working
    readonly property color tint: !entry.clock.known ? root.urgent
      : (entry.dimmed ? root.muted : root.foreground)

    spacing: root.labelGap
    anchors.verticalCenter: parent ? parent.verticalCenter : undefined

    Text {
      anchors.verticalCenter: parent.verticalCenter
      text: entry.clock.label
      color: entry.tint
      // The label is a fixed caption next to a changing number, so it sits a
      // step down the scale — present for identification, not competing with
      // the time for the glance.
      font.family: Style.font.family
      font.pixelSize: Style.font.caption
      // Held back from the time it captions, but only once: a dimmed clock is
      // already carrying the muted tint, and compounding the two put its label
      // under the legibility floor.
      opacity: entry.dimmed || !entry.clock.known ? 1.0 : 0.75
    }

    Text {
      anchors.verticalCenter: parent.verticalCenter
      text: entry.clock.time
      color: entry.tint
      font.family: Style.font.family
      font.pixelSize: Style.font.body
    }

    Text {
      anchors.verticalCenter: parent.verticalCenter
      // Collapsed rather than blanked, so a clock with no marker does not
      // carry an empty slot plus its Row spacing. The group re-flows when a
      // marker appears at midnight, which is the cheaper trade against dead
      // width on every clock, every day.
      visible: entry.clock.marker !== ""
      text: entry.clock.marker
      color: entry.tint
      font.family: Style.font.family
      font.pixelSize: Style.font.caption
      opacity: 0.7
    }
  }

  // ------------------------------------------------------------ the surface

  component ClockPanel: PanelWindow {
    id: panel

    color: root.background
    // Bottom edge, full width, reserving its own height so Hyprland tiles
    // windows above it exactly as it does for the top bar.
    anchors { bottom: true; left: true; right: true }
    implicitHeight: root.barSize
    exclusionMode: ExclusionMode.Auto
    surfaceFormat.opaque: false
    WlrLayershell.namespace: "nerdnation-clockbar"
    WlrLayershell.layer: WlrLayer.Top

    ScreenMoveRemap {
      id: remapGuard
      window: panel
    }

    visible: !remapGuard.remapping

    MouseArea {
      id: surfaceHover
      anchors.fill: parent
      hoverEnabled: true
      cursorShape: Qt.PointingHandCursor
      acceptedButtons: Qt.LeftButton | Qt.RightButton
      onClicked: root.openEditor()
    }

    // A hairline along the top edge separates the bar from the window below
    // it, which otherwise meets it as one flat field of colour. It doubles as
    // the config-error signal: full-width chrome is the one thing on the bar
    // that cannot be overlapped by a long list of clocks.
    Rectangle {
      anchors { top: parent.top; left: parent.left; right: parent.right }
      height: configFile.parseError !== "" ? 2 : 1
      color: configFile.parseError !== "" ? root.urgent : root.foreground
      opacity: configFile.parseError !== "" ? 0.9 : 0.12
    }

    Row {
      id: leftGroup
      anchors { left: parent.left; leftMargin: root.edgePadding; verticalCenter: parent.verticalCenter }
      spacing: root.clockGap

      Repeater {
        model: root.bar.left
        delegate: Clock {
          required property var modelData
          clock: modelData
        }
      }
    }

    // Local time is centred on the screen rather than between its neighbours,
    // so it holds still while the groups either side change width.
    Row {
      id: centerGroup
      anchors { horizontalCenter: parent.horizontalCenter; verticalCenter: parent.verticalCenter }
      spacing: root.labelGap

      Text {
        anchors.verticalCenter: parent.verticalCenter
        text: root.bar.center.time
        color: root.accent
        font.family: Style.font.family
        font.pixelSize: Style.font.body
        font.bold: true
      }

      // Only while clockbar.json will not parse. The clocks either side are
      // the last good config still ticking, which is worth keeping on screen —
      // but not worth passing off as current.
      Text {
        anchors.verticalCenter: parent.verticalCenter
        visible: configFile.parseError !== ""
        text: "config error"
        color: root.urgent
        font.family: Style.font.family
        font.pixelSize: Style.font.caption
      }
    }

    Row {
      id: rightGroup
      anchors { right: parent.right; rightMargin: root.edgePadding; verticalCenter: parent.verticalCenter }
      spacing: root.clockGap

      Repeater {
        model: root.bar.right
        delegate: Clock {
          required property var modelData
          clock: modelData
        }
      }
    }

    // A broken config file is signalled on the hairline (see above) rather
    // than in a text label. The earlier label was anchored to the right edge
    // with the same margin as the right-hand clock group, so it rendered on
    // top of those clocks — and any fixed position on a bar whose contents
    // grow with the config has that same collision waiting for it.
  }

  Variants {
    model: Quickshell.screens

    delegate: Component {
      ClockPanel {
        required property var modelData
        screen: modelData
      }
    }
  }
}