import QtQuick
import qs.Commons
import qs.Ui

// TierStage.qml - One tier: pick from the cached catalogue, or type any id.
//
// One stage of the claude-mode panel. Panel.qml hands itself in as `panel`
// and owns all the state and actions; this file only draws them.
Column {
  id: stage
  required property var panel

  width: parent.width
  visible: stage.panel.stage === "presetTier"
  spacing: Style.space(7)

  Text {
    width: parent.width
    text: stage.panel.editTier + "  ·  '" + stage.panel.editPreset + "'"
    color: Color.popups.text
    elide: Text.ElideRight
    font.family: stage.panel.uiFont
    font.pixelSize: Style.space(13)
    font.bold: true
  }

  Text {
    width: parent.width
    text: "now: " + (stage.panel.editCurrent(stage.panel.editTier) || "not set")
    color: Color.muted
    elide: Text.ElideLeft
    font.family: stage.panel.uiFont
    font.pixelSize: Style.space(10)
  }

  // One field that both filters the catalogue and takes any id typed by
  // hand, with the matches listed inline beneath it - rather than the
  // shell's SearchableDropdown, whose list is a second popup layered on
  // this card. Inline, the card's height is the only thing to manage,
  // and the list can never be clipped by the card's edge.
  TextField {
    id: modelField
    width: parent.width
    text: stage.panel.editModel
    placeholderText: stage.panel.modelOptions.length > 0
      ? "Search " + stage.panel.modelOptions.length + " models, or type any id"
      : "Model id"
    foreground: Color.popups.text
    font.family: stage.panel.uiFont
    font.pixelSize: Style.space(11)
    onTextChanged: {
      stage.panel.editModel = text
      modelList.currentIndex = -1
    }
    // Enter takes the highlighted match if the arrows chose one, and
    // saves what is in the field otherwise.
    onAccepted: {
      if (modelList.currentIndex >= 0 && modelList.currentIndex < stage.panel.modelMatches.length)
        stage.panel.pickModel(String(stage.panel.modelMatches[modelList.currentIndex].value))
      else
        stage.panel.saveTier()
    }
    Keys.onDownPressed: function (event) {
      if (modelList.count > 0) {
        modelList.currentIndex = Math.min(modelList.currentIndex + 1, modelList.count - 1)
        modelList.positionViewAtIndex(modelList.currentIndex, ListView.Contain)
      }
      event.accepted = true
    }
    Keys.onUpPressed: function (event) {
      if (modelList.currentIndex >= 0) {
        modelList.currentIndex = modelList.currentIndex - 1
        if (modelList.currentIndex >= 0) modelList.positionViewAtIndex(modelList.currentIndex, ListView.Contain)
      }
      event.accepted = true
    }
  }

  // Scrolls inside a box of at most six rows: the card clamps to its
  // content rather than scrolling, so an unbounded list would push the
  // buttons off the bottom edge.
  Rectangle {
    id: modelListFrame
    readonly property int rowHeight: Style.space(30)
    width: parent.width
    visible: stage.panel.modelOptions.length > 0
    height: rowHeight * Math.max(1, Math.min(modelList.count, 6)) + 2
    radius: Style.space(4)
    color: "transparent"
    border.width: 1
    border.color: Qt.rgba(Color.popups.text.r, Color.popups.text.g, Color.popups.text.b, 0.14)

    ListView {
      id: modelList
      anchors.fill: parent
      anchors.margins: 1
      clip: true
      boundsBehavior: Flickable.StopAtBounds
      currentIndex: -1
      model: stage.panel.stage === "presetTier" ? stage.panel.modelMatches : []

      delegate: Item {
        id: matchRow
        required property var modelData
        required property int index
        readonly property bool chosen: String(modelData.value) === stage.panel.editModel.trim()
        width: modelList.width
        height: modelListFrame.rowHeight

        Rectangle {
          anchors.fill: parent
          color: matchRow.index === modelList.currentIndex || matchArea.containsMouse
            ? Qt.rgba(Color.accent.r, Color.accent.g, Color.accent.b, 0.16)
            : (matchRow.chosen ? Qt.rgba(Color.accent.r, Color.accent.g, Color.accent.b, 0.10) : "transparent")
        }

        Column {
          anchors.left: parent.left
          anchors.right: parent.right
          anchors.leftMargin: Style.space(8)
          anchors.rightMargin: Style.space(8)
          anchors.verticalCenter: parent.verticalCenter
          spacing: 0

          Text {
            width: parent.width
            text: String(matchRow.modelData.label)
            color: matchRow.chosen ? Color.accent : Color.popups.text
            elide: Text.ElideMiddle
            font.family: stage.panel.uiFont
            font.pixelSize: Style.space(11)
            font.bold: matchRow.chosen
          }

          Text {
            width: parent.width
            visible: text !== ""
            text: String(matchRow.modelData.description || "")
            color: Color.muted
            elide: Text.ElideRight
            font.family: stage.panel.uiFont
            font.pixelSize: Style.space(9)
          }
        }

        MouseArea {
          id: matchArea
          anchors.fill: parent
          hoverEnabled: true
          cursorShape: Qt.PointingHandCursor
          onClicked: stage.panel.pickModel(String(matchRow.modelData.value))
        }
      }
    }

    Text {
      anchors.centerIn: parent
      visible: modelList.count === 0
      text: "No match. Save uses the id as typed."
      color: Color.muted
      font.family: stage.panel.uiFont
      font.pixelSize: Style.space(10)
    }
  }

  Text {
    width: parent.width
    visible: stage.panel.modelOptions.length === 0
    text: stage.panel.catalogueNode && stage.panel.catalogueNode.ok === false
      ? "The last fetch failed and no list is cached. Type an id, or try fetching again."
      : "No model list cached for " + stage.panel.pTitle(stage.panel.editProvider) + " yet. Type an id, or fetch the list."
    color: Color.muted
    wrapMode: Text.WordWrap
    font.family: stage.panel.uiFont
    font.pixelSize: Style.space(10)
  }

  Text {
    width: parent.width
    visible: stage.panel.catalogueNode !== null && stage.panel.modelOptions.length > 0
    text: stage.panel.catalogueNode
      ? stage.panel.modelOptions.length + " models cached, fetched " + stage.panel.ageLabel(stage.panel.catalogueNode.fetchedAt)
        + (stage.panel.catalogueNode.ok === false ? "  ·  the last refresh failed" : "")
      : ""
    color: Color.muted
    opacity: 0.85
    elide: Text.ElideRight
    font.family: stage.panel.uiFont
    font.pixelSize: Style.space(9)
  }

  Flow {
    width: parent.width
    spacing: Style.space(7)

    PillButton { fontFamily: stage.panel.uiFont; label: "Save"; primary: true; onTriggered: stage.panel.saveTier() }
    PillButton { fontFamily: stage.panel.uiFont;
      label: stage.panel.modelOptions.length > 0 ? "Refresh list" : "Fetch models"
      onTriggered: stage.panel.fetchModels()
    }
    PillButton { fontFamily: stage.panel.uiFont;
      label: "Back"
      onTriggered: { stage.panel.lastError = ""; stage.panel.stage = "preset" }
    }
  }

  // The panel cannot reach this field by id, so when a tier is opened or a
  // model picked it says so, and the field is reset or filled here. Typing
  // breaks the field's binding, so without the reset a value left from another
  // tier would survive into this one.
  Connections {
    target: stage.panel
    function onTierEditorOpened() {
      modelField.text = ""
      modelList.currentIndex = -1
      Qt.callLater(function () { modelField.forceActiveFocus() })
    }
    function onModelPicked(modelId) {
      modelField.text = modelId
      modelField.forceActiveFocus()
    }
  }
}