package server

// Shell is the data every top-level page hands the shared application
// shell (docs/design-system.md, "Application shell"): the top bar with its
// account menu (partials/shell_topbar.html) and, on the member surface, the
// rail (partials/shell_rail_member.html). One value per page, so the shell
// is written once and both surfaces render it the same way
// (chrome-conventions: "One shell for both surfaces"; "Session controls
// live in the account menu on both surfaces").
type Shell struct {
	// Surface is ShellMember or ShellOperator. The operator surface adds
	// the muted "Operator" label after the brand; the member surface
	// renders the member rail.
	Surface string
	// Name, Username, and Email are the session's identity claims. Name is
	// empty when the identity provider supplied none.
	Name     string
	Username string
	Email    string
	// KeycloakAccountURL is the identity provider's account console, the
	// "Identity and Access" destination.
	KeycloakAccountURL string
	// IsOperator gates the member rail's "Operator panel" surface switch.
	IsOperator bool
	// Active names the member rail entry to mark active: "dashboard",
	// "products", or "billing". The operator rail keeps its own
	// ActiveCapability logic in operator.html and ignores this.
	Active string
}

// The two surfaces the shell renders.
const (
	ShellMember   = "member"
	ShellOperator = "operator"
)

// Label is the account menu's trigger text: the person's display name, the
// username when the identity provider supplied no name, and a neutral word
// when it supplied neither, so the trigger is never blank.
func (s Shell) Label() string {
	if s.Name != "" {
		return s.Name
	}
	if s.Username != "" {
		return s.Username
	}
	return "Account"
}

// IsOperatorSurface reports whether the shell renders the operator surface.
func (s Shell) IsOperatorSurface() bool { return s.Surface == ShellOperator }

// Shell derives the operator surface's shell from the page data, which
// already carries the person's identity and the account console URL.
// Every operator page (this package's and an integration's via
// BuildOperatorPageData) gets the same shell without touching its
// constructor.
func (d OperatorPageData) Shell() Shell {
	return Shell{
		Surface:            ShellOperator,
		Name:               d.Name,
		Username:           d.Username,
		Email:              d.Email,
		KeycloakAccountURL: d.KeycloakAccountURL,
		IsOperator:         true,
	}
}