import { describe, it, expect } from "vitest";
import { emptyArtifact, serializeArtifact, type Artifact } from "../src/model";
import { expectValidSidecar, validateSidecar } from "./helpers/validateSidecar";

function fullArtifact(): Artifact {
  const a = emptyArtifact("docs/x.md");
  a.anchors["a_1"] = { fingerprint: { text: "alpha", before: "", after: " beta", lineHint: 0 } };
  a.threads.push({
    id: "t_1",
    anchorId: "a_1",
    status: "open",
    messages: [{ id: "m_1", author: { kind: "human", id: "ben" }, body: "hi", createdAt: "2026-06-10T00:00:00.000Z" }],
  });
  a.attributions.push({
    id: "at_1",
    anchorId: "a_1",
    author: { kind: "agent", id: "claude", agent: { sdk: "@cline/sdk", model: "sonnet", sessionId: "run-1" } },
    createdAt: "2026-06-10T00:00:00.000Z",
    updatedAt: "2026-06-10T00:00:00.000Z",
    turnId: "turn-1",
  });
  a.proposals.push({
    id: "p_1",
    anchorId: "a_1",
    replacement: "ALPHA",
    author: { kind: "agent", id: "claude", agent: { sdk: "@cline/sdk", model: "sonnet", sessionId: "run-1" } },
    createdAt: "2026-06-10T00:00:00.000Z",
    instruction: "shout",
  });
  return a;
}

describe("coauthoring-sidecar JSON Schema (F5 SLICE-1, PUC-5)", () => {
  it("validates the empty artifact and a full artifact", () => {
    expectValidSidecar(emptyArtifact("docs/x.md"));
    expectValidSidecar(fullArtifact());
  });

  it("rejects a structurally broken sidecar with error paths", () => {
    const broken = JSON.parse(serializeArtifact(fullArtifact()));
    broken.threads[0].status = "closed"; // not in the enum
    delete broken.schemaVersion;
    const { valid, errors } = validateSidecar(broken);
    expect(valid).toBe(false);
    expect(errors.some((e) => e.includes("schemaVersion"))).toBe(true);
  });

  it("accepts unknown fields everywhere (forward compat, INV-16)", () => {
    const data = JSON.parse(serializeArtifact(fullArtifact()));
    data.futureSection = [{ id: "f_1" }];
    data.threads[0].futureField = true;
    data.threads[0].messages[0].reactions = ["+1"];
    const { valid } = validateSidecar(data);
    expect(valid).toBe(true);
  });
});