import {
  PipelineStage,
  PipelineState,
  PhaseResult,
  STAGE_ORDER,
  getNextStage,
  createInitialPipelineState,
} from "../types/pipeline.js";

describe("STAGE_ORDER", () => {
  it("has 8 stages in correct order", () => {
    expect(STAGE_ORDER).toEqual([
      "specify",
      "clarify",
      "research",
      "plan",
      "execute",
      "test",
      "verify",
      "complete",
    ]);
  });
});

describe("getNextStage", () => {
  it("returns the next stage in sequence", () => {
    expect(getNextStage("specify")).toBe("clarify");
    expect(getNextStage("clarify")).toBe("research");
    expect(getNextStage("research")).toBe("plan");
    expect(getNextStage("plan")).toBe("execute");
    expect(getNextStage("execute")).toBe("test");
    expect(getNextStage("test")).toBe("verify");
    expect(getNextStage("verify")).toBe("complete");
  });

  it("returns null for the last stage", () => {
    expect(getNextStage("complete")).toBeNull();
  });

  it("returns null for unknown stage", () => {
    expect(getNextStage("unknown" as PipelineStage)).toBeNull();
  });
});

describe("createInitialPipelineState", () => {
  it("creates a valid initial state", () => {
    const state = createInitialPipelineState("/test/project");
    expect(state.project_path).toBe("/test/project");
    expect(state.current_stage).toBe("specify");
    expect(state.current_phase).toBe(0);
    expect(state.specification_loaded).toBe(false);
    expect(state.clarify_completed).toBe(false);
    expect(state.research_completed).toBe(false);
    expect(state.plan_completed).toBe(false);
    expect(state.execute_completed).toBe(false);
    expect(state.test_completed).toBe(false);
    expect(state.verify_completed).toBe(false);
    expect(state.errors).toHaveLength(0);
    expect(state.started_at).toBeTruthy();
    expect(state.last_updated).toBeTruthy();
  });
});