import QtQuick
import QtQuick.Controls
import QtQuick.Layouts

// One message in the transcript: the prompt, the answer, or an error. The
// answer arrives as plain text while it streams and is rendered from markdown
// (by the engine, through AgentCore::renderMarkdown) once it is complete.
Rectangle {
    id: card
    property string role: "agent"      // user | agent | error
    property string text: ""
    property string html: ""
    property bool complete: true

    radius: Theme.radius
    color: role === "user" ? Theme.surfaceAlt : Theme.surface
    border.width: 1
    border.color: role === "error" ? Theme.err
                : role === "user" ? Theme.border : Theme.border
    implicitHeight: layout.implicitHeight + Theme.pad * 2

    ColumnLayout {
        id: layout
        anchors {
            left: parent.left
            right: parent.right
            top: parent.top
            margins: Theme.pad
        }
        spacing: Theme.gap

        RowLayout {
            spacing: Theme.gap
            Rectangle {
                width: 6
                height: 6
                radius: 3
                color: card.role === "user" ? Theme.accent
                     : card.role === "error" ? Theme.err : Theme.ok
            }
            Text {
                text: card.role === "user" ? "You"
                    : card.role === "error" ? "Error" : "CST-agent"
                color: Theme.textDim
                font.pixelSize: Theme.smallSize
                font.bold: true
            }
            Text {
                visible: !card.complete
                text: "streaming…"
                color: Theme.textFaint
                font.pixelSize: Theme.smallSize
            }
            Item { Layout.fillWidth: true }
            ToolButton {
                implicitWidth: 26
                implicitHeight: 22
                visible: card.text.length > 0
                ToolTip.visible: hovered
                ToolTip.text: "Copy"
                contentItem: Text {
                    text: "⧉"
                    color: parent.hovered ? Theme.text : Theme.textFaint
                    font.pixelSize: Theme.smallSize
                    horizontalAlignment: Text.AlignHCenter
                }
                background: Rectangle {
                    radius: Theme.radiusSm
                    color: parent.hovered ? Theme.surfaceHi : "transparent"
                }
                onClicked: {
                    plain.text = card.text
                    plain.selectAll()
                    plain.copy()
                }
            }
        }

        // Hidden holder so "copy" always has the plain text, rtf or not.
        TextEdit {
            id: plain
            visible: false
        }

        TextEdit {
            id: streamText
            visible: card.html.length === 0
            Layout.fillWidth: true
            text: card.text
            readOnly: true
            selectByMouse: true
            wrapMode: TextEdit.Wrap
            color: card.role === "error" ? Theme.err : Theme.text
            font.pixelSize: Theme.bodySize
            selectionColor: Theme.accentDim
        }

        Text {
            visible: card.html.length > 0
            Layout.fillWidth: true
            text: card.html
            textFormat: Text.RichText
            color: Theme.text
            font.pixelSize: Theme.bodySize
            wrapMode: Text.Wrap
            onLinkActivated: function (link) { Qt.openUrlExternally(link) }
        }
    }
}