import { describe, it, expect } from "vitest";
import { mount } from "@vue/test-utils";
import RcaPanel from "../RcaPanel.vue";
import { groupIncidents } from "@/lib/rca";
import type { TelemetryRecord } from "@/lib/telemetry";

const env = (m: string, c: string, corr: string) => ({
  messageId: m,
  causationId: c,
  correlationId: corr,
});

const RECORDS: TelemetryRecord[] = [
  {
    kind: "action.dispatched",
    action: "orders.charge",
    appName: "billing",
    ts: "2026-01-01T00:00:00.000Z",
    envelope: env("m1", "m1", "c1"),
  },
  {
    kind: "action.failed",
    action: "orders.charge",
    appName: "billing",
    attempt: 1,
    maxAttempts: 3,
    willRetry: true,
    ts: "2026-01-01T00:00:00.050Z",
    error: { name: "TimeoutError", message: "timed out", stack: "at chargeCard (billing.ts:42)" },
    envelope: env("m2", "m1", "c1"),
  },
  {
    kind: "dlq.recorded",
    action: "orders.charge",
    appName: "billing",
    attempts: 3,
    ts: "2026-01-01T00:00:00.300Z",
    error: { name: "TimeoutError", message: "timed out" },
    envelope: env("m3", "m1", "c1"),
  },
];

const incident = groupIncidents(RECORDS)[0]!;

describe("RcaPanel", () => {
  it("opens on the 'What happened' tab with the suggested fix", () => {
    const w = mount(RcaPanel, { props: { incident } });
    expect(w.get('[data-testid="rca-what"]').exists()).toBe(true);
    expect(w.get('[data-testid="rca-suggestion"]').text().length).toBeGreaterThan(0);
  });

  it("switches to the timeline and lists the whole chain with failures flagged", async () => {
    const w = mount(RcaPanel, { props: { incident } });
    await w.get('[data-testid="rca-tab-timeline"]').trigger("click");
    const rows = w.findAll('[data-testid="rca-timeline-row"]');
    expect(rows).toHaveLength(3);
    expect(rows.filter((r) => r.attributes("data-failure") === "true")).toHaveLength(2);
  });

  it("shows the blast radius on the impact tab", async () => {
    const w = mount(RcaPanel, { props: { incident } });
    await w.get('[data-testid="rca-tab-impact"]').trigger("click");
    const impact = w.get('[data-testid="rca-impact"]');
    expect(impact.text()).toContain("billing");
    expect(impact.text()).toContain("Yes"); // dead-lettered
  });

  it("shows the root error + stack on the evidence tab", async () => {
    const w = mount(RcaPanel, { props: { incident } });
    await w.get('[data-testid="rca-tab-evidence"]').trigger("click");
    expect(w.get('[data-testid="rca-evidence"]').text()).toContain("TimeoutError");
    expect(w.get('[data-testid="rca-stack"]').text()).toContain("chargeCard");
  });

  it("emits open-source when the source pill is clicked", async () => {
    const source = { file: "apps/billing/orders.charge.ts", line: 42 };
    const w = mount(RcaPanel, { props: { incident, source } });
    await w.get('[data-testid="source-pill"]').trigger("click");
    expect(w.emitted("open-source")?.[0]?.[0]).toEqual(source);
  });
});