import QtQuick
import QtQuick.Controls
import QtQuick.Layouts
import QtQuick.Window

ApplicationWindow {
    id: window
    width: 720
    height: 520
    visible: true
    title: "php-qml — Phase 0 spike"

    readonly property string baseUrl: "http://127.0.0.1:8765"
    readonly property string topic: "app://ping"

    property string status: "starting…"
    property string lastResponse: ""
    property string mercureState: "disconnected"

    Mercure {
        id: mercure
        url: window.baseUrl + "/.well-known/mercure?topic=" + encodeURIComponent(window.topic)
        onEventReceived: function(data, id) {
            log.append("← event " + id.split(":").pop() + "  " + data)
        }
        onStateChanged: function(s) {
            window.mercureState = s
            log.append("· mercure → " + s)
        }
    }

    Timer {
        id: bootProbe
        interval: 250
        running: window.status !== "online"
        repeat: true
        onTriggered: {
            const xhr = new XMLHttpRequest()
            xhr.open("GET", window.baseUrl + "/api/ping")
            xhr.onreadystatechange = function() {
                if (xhr.readyState === XMLHttpRequest.DONE && xhr.status === 200) {
                    if (window.status !== "online") {
                        window.status = "online"
                        log.append("· backend ready")
                        mercure.connect()
                    }
                }
            }
            xhr.send()
        }
    }

    ColumnLayout {
        anchors.fill: parent
        anchors.margins: 16
        spacing: 12

        RowLayout {
            spacing: 10
            Layout.fillWidth: true

            Rectangle {
                width: 12; height: 12; radius: 6
                color: window.status === "online" ? "#3ab36c" : "#d89614"
            }
            Label { text: "Backend: " + window.status }

            Item { width: 12 }

            Rectangle {
                width: 12; height: 12; radius: 6
                color: window.mercureState === "connected" ? "#3ab36c" : "#666"
            }
            Label { text: "Mercure: " + window.mercureState }

            Item { Layout.fillWidth: true }

            Button {
                text: "Ping"
                enabled: window.status === "online"
                onClicked: {
                    const t0 = Date.now()
                    const xhr = new XMLHttpRequest()
                    xhr.open("GET", window.baseUrl + "/api/ping")
                    xhr.onreadystatechange = function() {
                        if (xhr.readyState === XMLHttpRequest.DONE) {
                            const dt = Date.now() - t0
                            if (xhr.status === 200) {
                                window.lastResponse = xhr.responseText
                                log.append("→ ping " + dt + "ms  " + xhr.responseText)
                            } else {
                                log.append("× ping failed status=" + xhr.status)
                            }
                        }
                    }
                    xhr.send()
                }
            }
        }

        Label {
            text: "Last response: " + (window.lastResponse || "—")
            color: "#888"
            font.pixelSize: 12
            Layout.fillWidth: true
            elide: Text.ElideRight
        }

        Frame {
            Layout.fillWidth: true
            Layout.fillHeight: true
            padding: 0

            ScrollView {
                anchors.fill: parent

                TextArea {
                    id: log
                    readOnly: true
                    wrapMode: TextArea.Wrap
                    font.family: "monospace"
                    font.pixelSize: 12
                    placeholderText: "events will appear here…"
                }
            }
        }
    }
}