{
  "properties": {
    "displayName": "Web Application Firewall (WAF) should use the specified mode for Azure Front Door Service",
    "description": "Mandates the use of 'Detection' or 'Prevention' mode to be active on all Web Application Firewall policies for Azure Front Door Service.",
    "policyType": "BuiltIn",
    "mode": "Indexed",
    "metadata": {
      "version": "1.0.0",
      "category": "Network"
    },
    "parameters": {
      "effect": {
        "type": "String",
        "metadata": {
          "displayName": "Effect",
          "description": "Enable or disable the execution of the policy"
        },
        "allowedValues": [
          "Audit",
          "Deny",
          "Disabled"
        ],
        "defaultValue": "Audit"
      },
      "modeRequirement": {
        "type": "String",
        "metadata": {
          "displayName": "Mode Requirement",
          "description": "Mode required for all WAF policies"
        },
        "allowedValues": [
          "Prevention",
          "Detection"
        ],
        "defaultValue": "Detection"
      }
    },
    "policyRule": {
      "if": {
            "allOf": [
              {
                "field": "type",
                "equals": "Microsoft.Network/frontdoorwebapplicationfirewallpolicies"
              },
              {
                "field": "Microsoft.Network/frontdoorWebApplicationFirewallPolicies/policySettings.mode",
                "notEquals": "[parameters('modeRequirement')]"
              }
            ]
      },
      "then": {
        "effect": "[parameters('effect')]"
      }
    }
  },
  "id": "/providers/Microsoft.Authorization/policyDefinitions/425bea59-a659-4cbb-8d31-34499bd030b8",
  "name": "425bea59-a659-4cbb-8d31-34499bd030b8"
}