param location string = resourceGroup().location
param storageAccountName string
param functionAppName string = 'fn-${uniqueString(resourceGroup().id)}'

var appServicePlanName = 'MyPlan'
var applicationInsightsName = 'MyApplicationInsights'

resource storageAccount 'Microsoft.Storage/storageAccounts@2021-06-01' existing = {
  name: storageAccountName
}

var storageAccountConnectionString = 'DefaultEndpointsProtocol=https;AccountName=${storageAccount.name};EndpointSuffix=${environment().suffixes.storage};AccountKey=${listKeys(storageAccount.id, storageAccount.apiVersion).keys[0].value}'

resource functionApp 'Microsoft.Web/sites@2021-02-01' = {
  name: functionAppName
  location: location
  kind: 'functionapp'
  properties: {
    httpsOnly: true
    serverFarmId: appServicePlan.id
    siteConfig: {
      appSettings: [
        {
          name: 'APPINSIGHTS_INSTRUMENTATIONKEY'
          value: applicationInsights.properties.InstrumentationKey
        }
        {
          name: 'AzureWebJobsStorage'
          value: storageAccountConnectionString
        }
        {
          name: 'FUNCTIONS_EXTENSION_VERSION'
          value: '~3'
        }
        {
          name: 'FUNCTIONS_WORKER_RUNTIME'
          value: 'dotnet'
        }
        {
          name: 'WEBSITE_CONTENTAZUREFILECONNECTIONSTRING'
          value: storageAccountConnectionString
        }
      ]
    }
  }
}

resource appServicePlan 'Microsoft.Web/serverfarms@2020-10-01' = {
  name: appServicePlanName
  location: location
  sku: {
    name: 'Y1' 
    tier: 'Dynamic'
  }
}

resource applicationInsights 'Microsoft.Insights/components@2020-02-02-preview' = {
  name: applicationInsightsName
  location: location
  kind: 'web'
  properties: { 
    Application_Type: 'web'
    publicNetworkAccessForIngestion: 'Enabled'
    publicNetworkAccessForQuery: 'Enabled'
  }
}