Tyespec migration for alertsmanagement PreviewAlertRule

specification/alertsmanagement/resource-manager/Microsoft.AlertsManagement/PreviewAlertRule/back-compatible.tsp

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+import "@azure-tools/typespec-client-generator-core";
+
+using Azure.ClientGenerator.Core;
+using Microsoft.AlertsManagement;
+
+#suppress "@azure-tools/typespec-azure-core/no-legacy-usage" "FIXME: Update justification, follow aka.ms/tsp/conversion-fix for details"
+@@Legacy.flattenProperty(LogAlertRuleResource.properties);

specification/alertsmanagement/resource-manager/Microsoft.AlertsManagement/PreviewAlertRule/client.tsp

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+import "./main.tsp";
+import "@azure-tools/typespec-client-generator-core";
+
+using Azure.ClientGenerator.Core;
+using Microsoft.AlertsManagement;
+
+@@clientName(Microsoft.AlertsManagement,
+  "PreviewAlertRuleMgmtClient",
+  "python"
+);
+@@clientName(AlertSeverity.`0`, "ZERO", "python");
+@@clientName(AlertSeverity.`1`, "ONE", "python");
+@@clientName(AlertSeverity.`2`, "TWO", "python");
+@@clientName(AlertSeverity.`3`, "THREE", "python");
+@@clientName(AlertSeverity.`4`, "FOUR", "python");
+
+@@clientName(AlertSeverity.`0`, "Zero", "go");
+@@clientName(AlertSeverity.`1`, "One", "go");
+@@clientName(AlertSeverity.`2`, "Two", "go");
+@@clientName(AlertSeverity.`3`, "Three", "go");
+@@clientName(AlertSeverity.`4`, "Four", "go");
+@@clientName(Microsoft.AlertsManagement, "Client", "go");

specification/alertsmanagement/resource-manager/Microsoft.AlertsManagement/PreviewAlertRule/examples/2025-07-01-preview/previewDynamicThresholdLogSearchAlertRule.json

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+{
+  "parameters": {
+    "api-version": "2025-07-01-preview",
+    "parameters": {
+      "location": "eastus",
+      "properties": {
+        "scheduledQueryRuleProperties": {
+          "location": "eastus",
+          "properties": {
+            "description": "Performance rule",
+            "criteria": {
+              "allOf": [
+                {
+                  "alertSensitivity": "Medium",
+                  "criterionType": "DynamicThresholdCriterion",
+                  "dimensions": [
+                    {
+                      "name": "AlertName",
+                      "operator": "Include",
+                      "values": [
+                        "alert"
+                      ]
+                    }
+                  ],
+                  "operator": "GreaterThan",
+                  "query": "Alert",
+                  "timeAggregation": "Count"
+                }
+              ]
+            },
+            "enabled": true,
+            "evaluationFrequency": "PT1H",
+            "scopes": [
+              "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/myResourceGroup/providers/Microsoft.OperationalInsights/workspaces/myWorkspace"
+            ],
+            "severity": 4,
+            "windowSize": "PT1H"
+          }
+        },
+        "timespan": "PT24H"
+      }
+    },
+    "resourceId": "subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/myResourceGroup/providers/Microsoft.OperationalInsights/workspaces/myWorkspace"
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "rulePreviewResults": [
+          {
+            "dimensionCombination": [
+              {
+                "name": "AlertName",
+                "value": "Alert1"
+              }
+            ],
+            "evaluations": [
+              {
+                "alertState": "Fired",
+                "evaluatedPeriods": [
+                  {
+                    "highThreshold": 80,
+                    "lowThreshold": 20,
+                    "metricValue": 85,
+                    "thresholdMet": true,
+                    "timestamp": "2025-02-15T09:00:00Z"
+                  },
+                  {
+                    "highThreshold": 80,
+                    "lowThreshold": 20,
+                    "metricValue": 75,
+                    "thresholdMet": false,
+                    "timestamp": "2025-02-15T08:00:00Z"
+                  }
+                ],
+                "evaluationTime": "2025-02-15T10:00:00Z",
+                "thresholdMet": true
+              },
+              {
+                "alertState": "Resolved",
+                "evaluatedPeriods": [
+                  {
+                    "highThreshold": 80,
+                    "lowThreshold": 20,
+                    "metricValue": 65,
+                    "thresholdMet": false,
+                    "timestamp": "2025-02-15T10:00:00Z"
+                  },
+                  {
+                    "highThreshold": 80,
+                    "lowThreshold": 20,
+                    "metricValue": 85,
+                    "thresholdMet": true,
+                    "timestamp": "2025-02-15T09:00:00Z"
+                  }
+                ],
+                "evaluationTime": "2025-02-15T11:00:00Z",
+                "thresholdMet": false
+              }
+            ]
+          }
+        ]
+      }
+    }
+  },
+  "operationId": "PreviewAlertRule",
+  "title": "Run preview of a dynamic threshold log search alert rule"
+}

specification/alertsmanagement/resource-manager/Microsoft.AlertsManagement/PreviewAlertRule/main.tsp

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+/**
+ * PLEASE DO NOT REMOVE - USED FOR CONVERTER METRICS
+ * Generated by package: @autorest/openapi-to-typespec
+ * Parameters used:
+ *   isFullCompatible: true
+ *   guessResourceKey: false
+ * Version: 0.11.12
+ * Date: 2025-12-08T01:30:48.361Z
+ */
+import "@typespec/rest";
+import "@typespec/versioning";
+import "@azure-tools/typespec-azure-core";
+import "@azure-tools/typespec-azure-resource-manager";
+import "./models.tsp";
+import "./back-compatible.tsp";
+import "./routes.tsp";
+
+using TypeSpec.Rest;
+using TypeSpec.Http;
+using Azure.ResourceManager.Foundations;
+using Azure.Core;
+using Azure.ResourceManager;
+using TypeSpec.Versioning;
+/**
+ * The Preview Alert Rule API provides the ability to retrieve the results of a simulated historical execution of an alert rule
+ */
+#suppress "@azure-tools/typespec-azure-resource-manager/missing-operations-endpoint" "FIXME: Update justification, follow aka.ms/tsp/conversion-fix for details"
+@armProviderNamespace
+@service(#{
+  title: "Preview Alert Rule API in Alerts Management Service Resource Provider",
+})
+@versioned(Versions)
+@armCommonTypesVersion(Azure.ResourceManager.CommonTypes.Versions.v3)
+namespace Microsoft.AlertsManagement;
+
+/**
+ * The available API versions.
+ */
+enum Versions {
+  /**
+   * The 2025-07-01-preview API version.
+   */
+  v2025_07_01_preview: "2025-07-01-preview",
+}