import {
  buildChannelOutboundSessionRoute,
  stripChannelTargetPrefix,
  stripTargetKindPrefix,
  type ChannelOutboundSessionRouteParams,
} from "openclaw/plugin-sdk/core";

export function resolveMatrixOutboundSessionRoute(params: ChannelOutboundSessionRouteParams) {
  const stripped = stripChannelTargetPrefix(params.target, "matrix");
  const isUser =
    params.resolvedTarget?.kind === "user" || stripped.startsWith("@") || /^user:/i.test(stripped);
  const rawId = stripTargetKindPrefix(stripped);
  if (!rawId) {
    return null;
  }
  return buildChannelOutboundSessionRoute({
    cfg: params.cfg,
    agentId: params.agentId,
    channel: "matrix",
    accountId: params.accountId,
    peer: {
      kind: isUser ? "direct" : "channel",
      id: rawId,
    },
    chatType: isUser ? "direct" : "channel",
    from: isUser ? `matrix:${rawId}` : `matrix:channel:${rawId}`,
    to: `room:${rawId}`,
  });
}