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

// The click-to-edit surface for the clock bar: add, rename, retime and remove
// clocks without touching JSON.
//
// It edits a draft copy and only writes on Save, so an abandoned edit leaves
// the file untouched — and because the write goes through the same Config
// object the file watcher feeds, the bar updates from disk either way. There
// is no second source of truth for the two config routes to disagree about.
Item {
  id: root

  property var configFile: null
  property var zones: null

  readonly property bool opened: controller.open
  property var draft: []
  property int workStart: 8
  property int workEnd: 18
  property bool dimOutside: true
  property bool defaultSeconds: false
  property bool localSeconds: false
  property int barSize: 0

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

  readonly property var zoneOptions: {
    var list = root.zones ? root.zones.allZones : []
    var out = []
    for (var i = 0; i < list.length; i++) out.push({ value: list[i], label: list[i] })
    return out
  }

  QtObject {
    id: controller
    property bool open: false
  }

  function open() {
    loadDraft()
    controller.open = true
  }

  function close() { controller.open = false }

  // A deep copy: editing the live config array in place would push
  // half-finished rows straight onto the bar.
  function loadDraft() {
    var cfg = root.configFile ? root.configFile.config : null
    var clocks = cfg && Array.isArray(cfg.clocks) ? cfg.clocks : []
    var copy = []
    for (var i = 0; i < clocks.length; i++) {
      var row = { label: String(clocks[i].label || ""), timezone: String(clocks[i].timezone || "") }
      if (typeof clocks[i].showSeconds === "boolean") row.showSeconds = clocks[i].showSeconds
      copy.push(row)
    }
    root.draft = copy
    if (cfg && cfg.workingHours) {
      root.workStart = Number(cfg.workingHours.start)
      root.workEnd = Number(cfg.workingHours.end)
    }
    root.dimOutside = cfg ? cfg.dimOutsideWorkingHours !== false : true
    root.defaultSeconds = cfg ? cfg.showSeconds === true : false
    root.localSeconds = Model.showsSeconds(cfg ? cfg.local : null, root.defaultSeconds)
    root.barSize = cfg && cfg.barSize > 0 ? cfg.barSize : 0
  }

  // What a row's toggle shows: its own setting when it has one, otherwise the
  // bar-wide default it is inheriting.
  function rowShowsSeconds(row) { return Model.showsSeconds(row, root.defaultSeconds) }

  // QML only re-renders a var array when the reference changes, so every
  // mutation rebuilds it rather than editing in place. That rebuild is also
  // why edits are committed on focus loss rather than on every keystroke:
  // replacing the array re-creates the row delegates, which would throw away
  // the field you are typing into.
  function replaceDraft(next) { root.draft = next }

  // Run an action that reads or replaces the draft, but only after every
  // control has committed what is currently in it.
  //
  // A text field commits on `editingFinished` and a spin box parses its typed
  // text on focus loss, so a value typed and then acted on directly — type a
  // label, click Save — was never in the draft the action read, and the typed
  // text was lost with the delegate. Moving focus first makes each control
  // commit through its own normal path; focus goes back to the panel's key
  // scope so Escape keeps working.
  function withPendingEdits(action) {
    keyScope.forceActiveFocus()
    Qt.callLater(action)
  }

  // Copies every key the row already had. Rebuilding it from a fixed pair of
  // fields silently dropped anything else on it — editing a label would have
  // thrown away that clock's own seconds setting.
  function updateRow(index, key, value) {
    var next = root.draft.slice()
    if (!next[index]) return
    var row = {}
    for (var k in next[index]) row[k] = next[index][k]
    row[key] = value
    next[index] = row
    replaceDraft(next)
  }

  function removeRow(index) {
    var next = root.draft.slice()
    next.splice(index, 1)
    replaceDraft(next)
  }

  function addRow() {
    var next = root.draft.slice()
    next.push({ label: "", timezone: "" })
    replaceDraft(next)
  }

  // A row is only saveable once it names a zone; the label falls back to the
  // zone's own name so a clock can never render blank.
  function saveableRows() {
    var out = []
    for (var i = 0; i < root.draft.length; i++) {
      var tz = String(root.draft[i].timezone || "").replace(/^\s+|\s+$/g, "")
      if (!tz) continue
      var label = String(root.draft[i].label || "").replace(/^\s+|\s+$/g, "")
      var row = { label: label || tz.split("/").pop().replace(/_/g, " "), timezone: tz }
      // Only clocks the user actually set keep an explicit flag; the rest go
      // on inheriting the bar-wide default.
      if (typeof root.draft[i].showSeconds === "boolean") row.showSeconds = root.draft[i].showSeconds
      out.push(row)
    }
    return out
  }

  function save() {
    if (!root.configFile) return
    var cfg = root.configFile.config
    root.configFile.save({
      version: 1,
      clocks: saveableRows(),
      workingHours: {
        start: root.workStart,
        end: root.workEnd,
        workdays: cfg && cfg.workingHours ? cfg.workingHours.workdays : [1, 2, 3, 4, 5]
      },
      dimOutsideWorkingHours: root.dimOutside,
      showSeconds: root.defaultSeconds,
      local: { showSeconds: root.localSeconds },
      barSize: root.barSize
    })
    close()
  }

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

  PanelWindow {
    id: window
    visible: root.opened
    anchors { top: true; bottom: true; left: true; right: true }
    color: "transparent"
    WlrLayershell.namespace: "nerdnation-clockbar-editor"
    WlrLayershell.layer: WlrLayer.Overlay
    WlrLayershell.keyboardFocus: WlrKeyboardFocus.Exclusive
    exclusionMode: ExclusionMode.Ignore

    Rectangle {
      anchors.fill: parent
      color: Qt.rgba(0, 0, 0, 0.45)
    }

    // Click-away closes; the card swallows its own clicks so a click inside
    // does not fall through to this one.
    MouseArea {
      anchors.fill: parent
      onClicked: root.close()
    }

    BorderSurface {
      id: card
      anchors.centerIn: parent
      width: Style.space(560)
      height: Math.min(parent.height - Style.space(80), content.implicitHeight + card.contentTopInset + card.contentBottomInset)
      radius: Style.cornerRadius
      color: root.background
      borderSpec: Border.localOrSurfaceSpec("popups", "border", Color.popups.border, Color.popups.border, Math.max(1, Style.space(2)))
      padding: Style.spacing.popupPadding

      MouseArea { anchors.fill: parent; onClicked: {} }

      Item {
        id: keyScope
        anchors.fill: parent
        anchors.margins: card.padding
        focus: true
        Keys.onEscapePressed: root.close()

        ColumnLayout {
          id: content
          anchors.fill: parent
          spacing: Style.space(10)

          PanelSectionHeader {
            Layout.fillWidth: true
            text: "Clock bar"
          }

          Text {
            Layout.fillWidth: true
            text: "Clocks are placed automatically: behind your local time to the left, ahead to the right."
            color: root.muted
            wrapMode: Text.WordWrap
            font.family: Style.font.family
            font.pixelSize: Style.font.caption
          }

          // ------------------------------------------------------- the rows

          Flickable {
            Layout.fillWidth: true
            // Tall enough for the rows it has, up to a cap that keeps the card
            // on screen with a long clock list; past that it scrolls.
            Layout.preferredHeight: Math.min(rows.implicitHeight, Style.space(300))
            contentHeight: rows.implicitHeight
            clip: true
            boundsBehavior: Flickable.StopAtBounds

            ColumnLayout {
              id: rows
              width: parent.width
              spacing: Style.space(6)

              Repeater {
                model: root.draft

                delegate: RowLayout {
                  id: row
                  required property int index
                  required property var modelData

                  Layout.fillWidth: true
                  spacing: Style.space(8)

                  TextField {
                    Layout.preferredWidth: Style.space(66)
                    text: row.modelData.label
                    placeholderText: "Label"
                    foreground: root.foreground
                    accent: root.accent
                    onEditingFinished: root.updateRow(row.index, "label", text)
                  }

                  SearchableDropdown {
                    Layout.fillWidth: true
                    showLabel: false
                    value: row.modelData.timezone
                    options: root.zoneOptions
                    placeholderText: "Search timezones..."
                    triggerLabel: row.modelData.timezone || "Choose a timezone"
                    foreground: root.foreground
                    accent: root.accent
                    onChanged: function (value) {
                      var i = row.index
                      root.withPendingEdits(function () { root.updateRow(i, "timezone", value) })
                    }
                  }

                  // The live offset, so the effect of a choice is visible
                  // before saving rather than only once the bar redraws.
                  Text {
                    Layout.preferredWidth: Style.space(52)
                    horizontalAlignment: Text.AlignRight
                    text: {
                      var off = root.zones && root.zones.offsets ? root.zones.offsets[row.modelData.timezone] : null
                      return off ? off : (row.modelData.timezone ? "—" : "")
                    }
                    color: root.muted
                    font.family: Style.font.family
                    font.pixelSize: Style.font.caption
                  }

                  Button {
                    text: "SS"
                    bordered: true
                    selected: root.rowShowsSeconds(row.modelData)
                    tooltipText: root.rowShowsSeconds(row.modelData)
                      ? "Showing seconds — click for HH:MM"
                      : "Show seconds on this clock"
                    foreground: root.foreground
                    accent: root.accent
                    onClicked: {
                      var i = row.index
                      var next = !root.rowShowsSeconds(row.modelData)
                      root.withPendingEdits(function () { root.updateRow(i, "showSeconds", next) })
                    }
                  }

                  Button {
                    iconText: "󰅙"
                    tooltipText: "Remove this clock"
                    foreground: root.foreground
                    accent: root.urgent
                    onClicked: {
                      var i = row.index
                      root.withPendingEdits(function () { root.removeRow(i) })
                    }
                  }
                }
              }

              Text {
                Layout.fillWidth: true
                visible: root.draft.length === 0
                text: "No clocks yet — add one below."
                color: root.muted
                font.family: Style.font.family
                font.pixelSize: Style.font.body
              }
            }
          }

          Button {
            Layout.alignment: Qt.AlignLeft
            text: "+ Add clock"
            bordered: true
            foreground: root.foreground
            accent: root.accent
            onClicked: root.withPendingEdits(root.addRow)
          }

          PanelSeparator { Layout.fillWidth: true }

          // -------------------------------------------------- working hours

          RowLayout {
            Layout.fillWidth: true
            spacing: Style.space(8)

            ToggleSwitch {
              checked: root.dimOutside
              foreground: root.foreground
              accent: root.accent
              onToggled: root.dimOutside = !root.dimOutside
            }

            Text {
              Layout.fillWidth: true
              text: "Dim clocks outside working hours"
              color: root.foreground
              elide: Text.ElideRight
              font.family: Style.font.family
              font.pixelSize: Style.font.body
            }
          }

          RowLayout {
            Layout.fillWidth: true
            spacing: Style.space(8)
            opacity: root.dimOutside ? 1.0 : 0.45

            Text {
              Layout.fillWidth: true
              text: "Working hours (local to each clock)"
              color: root.muted
              elide: Text.ElideRight
              font.family: Style.font.family
              font.pixelSize: Style.font.caption
            }

            NumberField {
              Layout.preferredWidth: Style.spacing.numberFieldWidth
              enabled: root.dimOutside
              value: root.workStart
              from: 0
              to: 24
              foreground: root.foreground
              accent: root.accent
              onModified: function (v) { root.workStart = v }
            }

            Text {
              text: "to"
              color: root.muted
              font.family: Style.font.family
              font.pixelSize: Style.font.body
            }

            NumberField {
              Layout.preferredWidth: Style.spacing.numberFieldWidth
              enabled: root.dimOutside
              value: root.workEnd
              from: 0
              to: 24
              foreground: root.foreground
              accent: root.accent
              onModified: function (v) { root.workEnd = v }
            }
          }

          PanelSeparator { Layout.fillWidth: true }

          PanelSectionHeader {
            Layout.fillWidth: true
            text: "Bar"
          }

          RowLayout {
            Layout.fillWidth: true
            spacing: Style.space(8)

            Text {
              Layout.fillWidth: true
              text: "Seconds on your local clock"
              color: root.foreground
              elide: Text.ElideRight
              font.family: Style.font.family
              font.pixelSize: Style.font.body
            }

            ToggleSwitch {
              checked: root.localSeconds
              foreground: root.foreground
              accent: root.accent
              onToggled: root.localSeconds = !root.localSeconds
            }
          }

          RowLayout {
            Layout.fillWidth: true
            spacing: Style.space(8)

            Text {
              Layout.fillWidth: true
              text: "Bar height — 0 follows the theme. Text scales with it."
              color: root.muted
              elide: Text.ElideRight
              font.family: Style.font.family
              font.pixelSize: Style.font.caption
            }

            NumberField {
              Layout.preferredWidth: Style.spacing.numberFieldWidth
              value: root.barSize
              from: 0
              to: 120
              foreground: root.foreground
              accent: root.accent
              onModified: function (v) { root.barSize = v }
            }
          }

          PanelSeparator { Layout.fillWidth: true }

          RowLayout {
            Layout.fillWidth: true
            spacing: Style.space(8)

            Text {
              Layout.fillWidth: true
              text: root.configFile ? root.configFile.path : ""
              color: root.muted
              elide: Text.ElideMiddle
              font.family: Style.font.family
              font.pixelSize: Style.font.caption
            }

            Button {
              text: "Cancel"
              bordered: true
              foreground: root.foreground
              accent: root.accent
              onClicked: root.close()
            }

            Button {
              text: "Save"
              bordered: true
              selected: true
              foreground: root.foreground
              accent: root.accent
              onClicked: root.withPendingEdits(root.save)
            }
          }
        }
      }
    }
  }
}