import "github.com/sethvargo/go-fastly/fastly"

// Create a client object. The client has no state, so it can be persisted
// and re-used. It is also safe to use concurrently due to its lack of state.
// There is also a DefaultClient() method that reads an environment variable.
// Please see the documentation for more information and details.
client, err := fastly.NewClient("YOUR_FASTLY_API_KEY")
if err != nil {
  log.Fatal(err)
}

// You can find the service ID in the Fastly web console.
var serviceID = "SU1Z0isxPaozGVKXdv0eY"

// Get the latest active version
latest, err := client.LatestVersion(&fastly.LatestVersionInput{
  Service: serviceID,
})
if err != nil {
  log.Fatal(err)
}

// Clone the latest version so we can make changes without affecting the
// active configuration.
version, err := client.CloneVersion(&fastly.CloneVersionInput{
  Service: serviceID,
  Version: latest.Number,
})
if err != nil {
  log.Fatal(err)
}

// Now you can make any changes to the new version. In this example, we will add
// a new domain.
domain, err := client.CreateDomain(&fastly.CreateDomainInput{
  Service: serviceID,
  Version: version.Number,
  Name: "example.com",
})
if err != nil {
  log.Fatal(err)
}

// Output: "example.com"
fmt.Println(domain.Name)

// Now we can validate that our version is valid.
valid, err := client.ValidateVersion(&fastly.ValidateVersionInput{
  Service: serviceID,
  Version: version.Number,
})
if err != nil {
  log.Fatal(err)
}
if !valid {
  log.Fatal("not valid version")
}

// Finally, activate this new version.
activeVersion, err := client.ActivateVersion(&fastly.ActivateVersionInput{
  Service: serviceID,
  Version: version.Number,
})
if err != nil {
  log.Fatal(err)
}

// Output: true
fmt.Printf("%b", activeVersion.Locked)