import { describe, expect, it } from "vitest";
import { createUpdatePlanTool } from "./update-plan-tool.js";

describe("update_plan tool", () => {
  it("returns a compact success payload", async () => {
    const tool = createUpdatePlanTool();
    const result = await tool.execute("call-1", {
      explanation: "Started work",
      plan: [
        { step: "Inspect harness", status: "completed" },
        { step: "Add tool", status: "in_progress" },
        { step: "Run tests", status: "pending" },
      ],
    });

    expect(result.content).toEqual([]);
    expect(result.details).toEqual({
      status: "updated",
      explanation: "Started work",
      plan: [
        { step: "Inspect harness", status: "completed" },
        { step: "Add tool", status: "in_progress" },
        { step: "Run tests", status: "pending" },
      ],
    });
  });

  it("rejects multiple in-progress steps", async () => {
    const tool = createUpdatePlanTool();

    await expect(
      tool.execute("call-1", {
        plan: [
          { step: "One", status: "in_progress" },
          { step: "Two", status: "in_progress" },
        ],
      }),
    ).rejects.toThrow("plan can contain at most one in_progress step");
  });

  it("ignores extra per-step fields instead of rejecting the plan", async () => {
    const tool = createUpdatePlanTool();
    const result = await tool.execute("call-1", {
      plan: [
        { step: "Inspect harness", status: "completed", owner: "agent-1" },
        { step: "Run tests", status: "pending", notes: ["later"] },
      ],
    });

    expect(result.content).toEqual([]);
    expect(result.details).toEqual({
      status: "updated",
      plan: [
        { step: "Inspect harness", status: "completed" },
        { step: "Run tests", status: "pending" },
      ],
    });
  });
});