metabuilder/qml/MetaBuilder/CAdapterPatternSelector.qml

import QtQuick
import QtQuick.Controls
import QtQuick.Layouts
import QmlComponents 1.0

ColumnLayout {
    id: root
    Layout.fillWidth: true
    spacing: 12

    property int selectedPattern: 0
    property var patterns: ["read-through", "write-through", "cache-aside", "dual-write"]

    property var descriptions: [
        "Read-through: Reads check cache first. On miss, the cache fetches from the primary DB, stores the result, and returns it. Best for read-heavy workloads.",
        "Write-through: Every write goes to both cache and primary DB synchronously. Guarantees consistency at the cost of write latency.",
        "Cache-aside: Application manages cache explicitly. Reads check cache, fetch from DB on miss and populate cache. Writes go directly to DB and invalidate cache.",
        "Dual-write: Writes are sent to two backends simultaneously (e.g., primary DB + search index). Requires conflict resolution strategy."
    ]

    signal patternChanged(int index)

    CText { variant: "subtitle1"; text: "Multi-Adapter Pattern" }
    CText { variant: "body2"; text: "Select how the primary, cache, and search adapters coordinate data flow." }

    FlexRow {
        Layout.fillWidth: true
        spacing: 8

        Repeater {
            model: root.patterns
            delegate: CButton {
                text: modelData
                variant: index === root.selectedPattern ? "primary" : "ghost"
                onClicked: root.patternChanged(index)
            }
        }
    }

    CPaper {
        Layout.fillWidth: true
        implicitHeight: patternDesc.implicitHeight + 24

        CText {
            id: patternDesc
            anchors.fill: parent
            anchors.margins: 12
            variant: "body2"
            wrapMode: Text.Wrap
            text: root.descriptions[root.selectedPattern]
        }
    }
}