/**
 * iai-mcp session-init plugin for OpenCode.
 *
 * Sends SDK prompt on session.updated to inject the system instruction.
 * The model calls memory_session_context on every new session.
 */

export const IaiMcpSessionInit = async ({
  client,
  project,
  directory,
  worktree,
  experimental_workspace,
  serverUrl,
  $,
}) => {
  const doneSessions = new Set();

  return {
    event: async ({ event }) => {
      if (event.type !== "session.updated") return;
      const sid = event.properties?.info?.id;
      if (!sid || doneSessions.has(sid)) return;
      doneSessions.add(sid);

      try {
        await client.session.prompt({
          path: { id: sid },
          body: {
            system: "MANDATORY: Call `memory_session_context` (no arguments) BEFORE answering any user query.",
            parts: [{ type: "text", text: "INIT" }],
            noReply: false,
          },
        });
      } catch {}
    },
  };
};