const channelStates = new Map();

export function getChannelState(channelId) {
  if (!channelStates.has(channelId)) {
    channelStates.set(channelId, {
      mode: "normal",
      shuffling: false,
    });
  }
  return channelStates.get(channelId);
}

export function enterMultiMessageMode(channelId) {
  const state = getChannelState(channelId);
  state.mode = "multi-message";
  channelStates.set(channelId, state);
}

export function exitMultiMessageMode(channelId) {
  const state = getChannelState(channelId);
  state.mode = "normal";
  channelStates.set(channelId, state);
}

export function isMultiMessageMode(channelId) {
  return getChannelState(channelId).mode === "multi-message";
}

export function setChannelShuffling(channelId, enabled) {
  const state = getChannelState(channelId);
  state.shuffling = enabled;
  channelStates.set(channelId, state);
}

export function getChannelShuffling(channelId) {
  return getChannelState(channelId).shuffling;
}

export function markLastShuffled(channelId) {
  const state = getChannelState(channelId);
  state.lastShuffledAt = Date.now();
  channelStates.set(channelId, state);
}