{
    "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
    "contentVersion": "1.0.0.0",
    "parameters": {
        "appName": {
            "type": "string",
            "metadata": {
                "description": "The name of the function app that you wish to create."
            }
        },
        "sku": {
            "type": "string",
            "allowedValues": [
                "Free",
                "Shared",
                "Basic",
                "Standard"
            ],
            "defaultValue": "Standard",
            "metadata": {
                "description": "The pricing tier for the hosting plan (if one is needed)."
            }
        },
        "workerSize": {
            "type": "string",
            "allowedValues": [
                "0",
                "1",
                "2"
            ],
            "defaultValue": "0",
            "metadata": {
                "description": "The instance size of the hosting plan (small, medium, or large), if one is needed."
            }
        },
        "appServicePlanId": {
            "type": "string",
            "defaultValue": "null",
            "metadata": {
                "description": "Resource ID for the App Service Plan. If null, an App Service Plan will be created."                
            }
        },
        "storageAccountType": {
            "type": "string",
            "defaultValue": "Standard_LRS",
            "allowedValues": [
                "Standard_LRS",
                "Standard_GRS",
                "Standard_RAGRS"                
            ],
            "metadata": {
                "description": "Storage Account type"
            }
        }
    },
    "variables": {
        "functionAppName": "[parameters('appName')]",
        "hostingPlanName": "[parameters('appName')]",
        "genPlanId": "[resourceId('Microsoft.Web/serverFarms/', variables('hostingPlanName'))]",
        "hostingPlanId": "[if(equals(parameters('appServicePlanId'),'null'), variables('genPlanId'), parameters('appServicePlanId'))]",
        "storageAccountName": "[concat(uniquestring(resourceGroup().id), 'functions')]"
    },
    "resources": [
        {
            "type": "Microsoft.Storage/storageAccounts",
            "name": "[variables('storageAccountName')]",
            "apiVersion": "2017-10-01",
            "location": "[resourceGroup().location]",
            "kind": "Storage",
            "sku": {
                "name": "[parameters('storageAccountType')]"
            }
        },
        {
            "type": "Microsoft.Web/serverfarms",
            "apiVersion": "2016-09-01",
            "condition": "[equals(parameters('appServicePlanId'),'null')]",
            "name": "[variables('hostingPlanName')]",
            "location": "[resourceGroup().location]",
            "properties": {
                "name": "[variables('hostingPlanName')]",
                "sku": "[parameters('sku')]",
                "workerSize": "[parameters('workerSize')]",
                "hostingEnvironment": "",
                "numberOfWorkers": 1
            }
        },
        {
            "apiVersion": "2016-08-01",
            "type": "Microsoft.Web/sites",
            "name": "[variables('functionAppName')]",
            "location": "[resourceGroup().location]",
            "kind": "functionapp",
            "properties": {
                "name": "[variables('functionAppName')]",
                "serverFarmId": "[variables('hostingPlanId')]",
                "hostingEnvironment": "",
                "clientAffinityEnabled": false,
                "siteConfig": {
                    "alwaysOn": true,
                    "cors":{
                        "allowedOrigins":[
                            "https://functions.azure.com",
                            "https://functions-staging.azure.com",
                            "https://functions-next.azure.com",
                            "https://functions-usgov-iowa.azurewebsites.us",
                            "https://functions-usgov-texas.azurewebsites.us",
                            "https://functions.ext.azure.us"                    
                        ]
                    }
                }
            },
            "dependsOn": [
                "[resourceId('Microsoft.Web/serverfarms', variables('hostingPlanName'))]",
                "[resourceId('Microsoft.Storage/storageAccounts', variables('storageAccountName'))]"
            ],
            "resources": [
                {
                    "apiVersion": "2016-08-01",
                    "name": "appsettings",
                    "type": "config",
                    "dependsOn": [
                        "[resourceId('Microsoft.Web/sites', variables('functionAppName'))]",
                        "[resourceId('Microsoft.Storage/storageAccounts', variables('storageAccountName'))]"
                    ],
                    "properties": {
                        "AzureWebJobsStorage": "[concat('DefaultEndpointsProtocol=https;AccountName=',variables('storageAccountName'),';AccountKey=',listkeys(resourceId('Microsoft.Storage/storageAccounts', variables('storageAccountName')), '2015-05-01-preview').key1,';')]", 
                        "AzureWebJobsDashboard": "[concat('DefaultEndpointsProtocol=https;AccountName=',variables('storageAccountName'),';AccountKey=',listkeys(resourceId('Microsoft.Storage/storageAccounts', variables('storageAccountName')), '2015-05-01-preview').key1,';')]", 
                        "FUNCTIONS_EXTENSION_VERSION": "~1"
                    }
                }
			]
        }
    ]
}