stato del mare: previsione onde Open-Meteo + scala Douglas (oggi/domani), EN/IT, context Sea

qml/js/tides.js

@@ -168,6 +168,19 @@ function fmtHM(t) {
     return (hh < 10 ? "0" : "") + hh + ":" + (mm < 10 ? "0" : "") + mm;
 }
 
+// Scala Douglas (stato del mare) dall'altezza d'onda significativa in metri
+// 0 Calmo, 1 Quasi calmo, 2 Poco mosso, 3 Mosso, 4 Molto mosso, 5 Agitato,
+// 6 Molto agitato, 7 Grosso, 8 Molto grosso, 9 Tempestoso
+function douglas(h) {
+    if (h <= 0) return 0;
+    var soglie = [0.1, 0.5, 1.25, 2.5, 4, 6, 9, 14];
+    var g = 1;
+    for (var i = 0; i < soglie.length; i++) {
+        if (h >= soglie[i]) g++;
+    }
+    return g;
+}
+
 // Formato data breve
 function fmtDate(t, dn) {
     var d = new Date(t);

qml/pages/DetailPage.qml

@@ -91,11 +91,71 @@ Page {
                 curveInfo.text = qsTr("Z₀ %1 m · 7 harmonic constituents").arg(port[4][0].toFixed(2))
             }
             cv.requestPaint()
+            seaState()
         } catch (e) {
             console.log("[tide] refresh error:", e)
         }
     }
 
+    function seaFail() {
+        seaLabel.text = qsTranslate("Sea", "Unavailable (offline)")
+        seaLabel.color = Theme.secondaryColor
+        seaSub.text = ""
+    }
+
+    function seaState() {
+        if (!port) return
+        console.log("[tide] seaState fetch:", port[0])
+        var xhr = new XMLHttpRequest()
+        var done = false
+        var to = setTimeout(function() {
+            if (!done) {
+                done = true
+                console.log("[tide] seaState timeout")
+                seaFail()
+            }
+        }, 12000)
+        xhr.open("GET",
+                 "https://marine-api.open-meteo.com/v1/marine?latitude=" + port[2]
+                 + "&longitude=" + port[3]
+                 + "&daily=wave_height_max&timezone=auto&forecast_days=3",
+                 true)
+        xhr.onreadystatechange = function() {
+            if (xhr.readyState === 4) {
+                if (done) return
+                done = true
+                clearTimeout(to)
+                console.log("[tide] seaState status:", xhr.status)
+                if (xhr.status === 200) {
+                    try {
+                        var j = JSON.parse(xhr.responseText)
+                        var wh = j.daily.wave_height_max
+                        if (wh && wh.length > 0) {
+                            var today = wh[0]
+                            var i0 = Tides.douglas(today)
+                            seaLabel.text = seaNames[i0] + " · " + Tides.fmtH(today, page.unit)
+                            seaLabel.color = i0 >= 5 ? Theme.errorColor
+                                          : (i0 >= 4 ? Theme.secondaryColor : Theme.highlightColor)
+                            if (wh.length > 1) {
+                                var i1 = Tides.douglas(wh[1])
+                                seaSub.text = qsTranslate("Sea", "Tomorrow") + ": " + seaNames[i1]
+                                              + " · " + Tides.fmtH(wh[1], page.unit)
+                                seaSub.color = Theme.secondaryColor
+                            } else {
+                                seaSub.text = ""
+                            }
+                            return
+                        }
+                    } catch (e) {
+                        console.log("[tide] seaState parse err:", e)
+                    }
+                }
+                seaFail()
+            }
+        }
+        xhr.send()
+    }
+
     property var moonNames: [
         qsTr("New moon"), qsTr("Waxing crescent"), qsTr("First quarter"), qsTr("Waxing gibbous"),
         qsTr("Full moon"), qsTr("Waning gibbous"), qsTr("Last quarter"), qsTr("Waning crescent")
@@ -109,6 +169,16 @@ Page {
         qsTranslate("Tide", "Sat")
     ]
 
+    // stato del mare: scala Douglas (0-9) — context "Sea" separato:
+    // "High" qui = "Grosso", non "Alta" degli eventi
+    property var seaNames: [
+        qsTranslate("Sea", "Calm"), qsTranslate("Sea", "Calm rippled"),
+        qsTranslate("Sea", "Smooth wavelets"), qsTranslate("Sea", "Slight"),
+        qsTranslate("Sea", "Moderate"), qsTranslate("Sea", "Rough"),
+        qsTranslate("Sea", "Very rough"), qsTranslate("Sea", "High"),
+        qsTranslate("Sea", "Very high"), qsTranslate("Sea", "Phenomenal")
+    ]
+
     SilicaFlickable {
         id: flick
         anchors.fill: parent
@@ -297,6 +367,15 @@ Page {
                 Label { id: rangeLabel; anchors.right: parent.right; anchors.rightMargin: Theme.horizontalPageMargin; anchors.verticalCenter: parent.verticalCenter }
             }
 
+            // Stato del mare (scala Douglas, previsione onde Open-Meteo)
+            Item { width: parent.width; height: Theme.itemSizeSmall
+                Label { text: "🌊 " + qsTranslate("Sea", "Sea state"); color: Theme.secondaryColor; anchors.left: parent.left; anchors.leftMargin: Theme.horizontalPageMargin; anchors.verticalCenter: parent.verticalCenter }
+                Label { id: seaLabel; text: "…"; anchors.left: parent.left; anchors.leftMargin: Theme.horizontalPageMargin + 130; anchors.right: parent.right; anchors.rightMargin: Theme.horizontalPageMargin; anchors.verticalCenter: parent.verticalCenter; horizontalAlignment: Text.AlignRight; truncationMode: TruncationMode.Fade }
+            }
+            Item { width: parent.width; height: Theme.itemSizeSmall
+                Label { id: seaSub; anchors.left: parent.left; anchors.leftMargin: Theme.horizontalPageMargin + 130; anchors.right: parent.right; anchors.rightMargin: Theme.horizontalPageMargin; anchors.verticalCenter: parent.verticalCenter; horizontalAlignment: Text.AlignRight; font.pixelSize: Theme.fontSizeSmall; truncationMode: TruncationMode.Fade }
+            }
+
             Item { width: parent.width; height: Theme.paddingLarge }
         }
     }