@startuml
skinparam backgroundColor white

actor User
participant "Call" as Card
participant Microphone as Mic
actor Guest

opt <color:#43a047>**""live.microphone.always_connected""**</color> is enabled
  Card -> Mic : Microphone connection attempted (muted)
  note over Mic : Connected at card load, before (and independent of) any call
  Mic --> User : Microphone access granted
end

User -> Card : Start a call
note over User, Card
  Via Call menu button or <color:#43a047>**""call_start""**</color> action.
  Needs a camera that supports 2-way audio
end note

opt <color:#43a047>**""live.microphone.always_connected""**</color> not enabled
  Card -> Mic : Microphone connection attempted (muted)
  note over Mic : Stays muted by default (<color:#43a047>**""live.microphone.auto_unmute""**</color>)
  Mic --> User : Microphone access granted
end

note over User, Mic
  The microphone must connect for the call to proceed —
  if access is denied or unsupported, the call does not start
end note

Card --> User : You hear the caller
note over Card
  Inbound audio unmutes if configured (<color:#43a047>**""live.auto_unmute""**</color>)
  Menu, status bar & next/previous hide (<color:#43a047>**""auto_hide""**</color>)
  Camera navigation is locked (<color:#43a047>**""live.controls.call.lock""**</color>)
end note

User -> Mic : Unmute to talk
note over Mic : List 'call' in <color:#43a047>**""live.microphone.auto_unmute""**</color> to unmute automatically

loop Until the call ends
  User -[#red]> Guest : Talking
  Guest -[#red]-> User : Responding
end

User -> Card : End the call
note over User, Card
  Via Hang-up button, <color:#43a047>**""call_end""**</color> action, or — when
  <color:#43a047>**""live.controls.call.lock""**</color> is disabled — navigating away
end note

Card --> User : Inbound audio mutes (<color:#43a047>**""live.auto_mute""**</color>)
Card -> Mic : Microphone mutes (<color:#43a047>**""live.microphone.auto_mute""**</color>)
note over Mic
  Disconnects after <color:#43a047>**""live.microphone.disconnect_seconds""**</color>
  unless <color:#43a047>**""live.microphone.always_connected""**</color>
end note
@enduml