import { describe, it, expect } from "vitest";
import { transformLoreData } from "@/lib/transform";

describe("transformLoreData", () => {
  it("returns empty array for empty data", () => {
    const result = transformLoreData({
      open_issues: [],
      open_mrs_authored: [],
      reviewing_mrs: [],
    });
    expect(result).toEqual([]);
  });

  it("puts reviews first, then issues, then authored MRs", () => {
    const result = transformLoreData({
      open_issues: [
        {
          iid: 42,
          title: "Bug fix",
          project: "g/p",
          web_url: "https://gitlab.com/g/p/-/issues/42",
        },
      ],
      open_mrs_authored: [
        {
          iid: 200,
          title: "My feature",
          project: "g/p",
          web_url: "https://gitlab.com/g/p/-/merge_requests/200",
        },
      ],
      reviewing_mrs: [
        {
          iid: 100,
          title: "Review this",
          project: "g/p",
          web_url: "https://gitlab.com/g/p/-/merge_requests/100",
          author_username: "alice",
        },
      ],
    });

    expect(result).toHaveLength(3);
    expect(result[0].type).toBe("mr_review");
    expect(result[0].requestedBy).toBe("alice");
    expect(result[1].type).toBe("issue");
    expect(result[2].type).toBe("mr_authored");
  });

  it("generates correct IDs for each type", () => {
    const result = transformLoreData({
      open_issues: [
        {
          iid: 42,
          title: "Issue",
          project: "group/repo",
          web_url: "https://x.com",
        },
      ],
      open_mrs_authored: [
        {
          iid: 200,
          title: "MR",
          project: "group/repo",
          web_url: "https://x.com",
        },
      ],
      reviewing_mrs: [
        {
          iid: 100,
          title: "Review",
          project: "group/repo",
          web_url: "https://x.com",
        },
      ],
    });

    // Keys escape / to :: for consistency with backend bridge.rs
    expect(result[0].id).toBe("mr_review:group::repo:100");
    expect(result[1].id).toBe("issue:group::repo:42");
    expect(result[2].id).toBe("mr_authored:group::repo:200");
  });

  it("preserves updated_at_iso from lore data", () => {
    const result = transformLoreData({
      open_issues: [],
      open_mrs_authored: [],
      reviewing_mrs: [
        {
          iid: 1,
          title: "T",
          project: "g/p",
          web_url: "https://x.com",
          updated_at_iso: "2026-02-25T10:00:00Z",
        },
      ],
    });

    expect(result[0].updatedAt).toBe("2026-02-25T10:00:00Z");
  });

  it("handles missing optional fields gracefully", () => {
    const result = transformLoreData({
      open_issues: [
        {
          iid: 1,
          title: "T",
          project: "g/p",
          web_url: "https://x.com",
        },
      ],
      open_mrs_authored: [],
      reviewing_mrs: [],
    });

    expect(result[0].updatedAt).toBeNull();
    expect(result[0].contextQuote).toBeNull();
    expect(result[0].requestedBy).toBeNull();
  });
});