/**
 * @file Unit tests for the codex stage-declaration safety net: nudges a live
 * codex pane to run `ccam stage` when detection has clearly moved past the
 * declared stage and stayed there, without ever writing stage itself.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

const os = require("node:os");
const path = require("node:path");

const SUITE_DB_PATH = path.join(
  os.tmpdir(),
  `dashboard-codex-nudge-${Date.now()}-${process.pid}.db`
);
process.env.DASHBOARD_DB_PATH = SUITE_DB_PATH;

const { describe, it, beforeEach, afterEach } = require("node:test");
const assert = require("node:assert/strict");

const { db } = require("../db");
const lanes = require("../lib/lanes");
const tmux = require("../lib/tmux");
const nudge = require("../lib/codex-nudge");

/** Backdate a lane's detected_at so it looks `minutes` old to the sweep. */
function backdateDetection(laneId, minutes) {
  const iso = new Date(Date.now() - minutes * 60_000).toISOString();
  db.prepare("UPDATE lanes SET detected_at = ? WHERE id = ?").run(iso, laneId);
}

describe("codex-nudge sweep", () => {
  let calls;

  beforeEach(() => {
    calls = [];
    tmux.__setExecImpl((args) => {
      calls.push(args);
      if (args[0] === "display-message") return "codex"; // pane running the codex CLI
      return "";
    });
    nudge.__resetNudgeState();
  });

  afterEach(() => {
    tmux.__reset();
  });

  function makeCodexLane({ cwd }) {
    const lane = lanes.createLane({ title: "cx", cwd, tool: "codex" });
    lanes.updateLane(lane.id, { run_id: `ccam-lane-${lane.id}` });
    lanes.recordDetection(lane.id, { nodeId: "tests", signal: "npm run test:server" });
    return lane;
  }

  it("nudges once a fresh detection has sat ahead of the declared stage past the delay", () => {
    const cwd = os.tmpdir();
    const lane = makeCodexLane({ cwd: `${cwd}/nudge-a` });
    backdateDetection(lane.id, 3); // older than the 2 min delay, well inside the 5 min TTL

    assert.equal(nudge.sweepCodexNudges(), 1);
    const sendKeys = calls.filter((a) => a[0] === "send-keys" && a[3] === "-l");
    assert.equal(sendKeys.length, 1);
    assert.match(sendKeys[0][4], /ccam stage tests --tool codex/);

    // A second pass for the same still-undeclared detection must not repeat it.
    assert.equal(nudge.sweepCodexNudges(), 0);
    lanes.deleteLane(lane.id);
  });

  it("never nudges before the delay has elapsed", () => {
    const cwd = os.tmpdir();
    const lane = makeCodexLane({ cwd: `${cwd}/nudge-b` });
    // detected_at is "now" — recordDetection just set it.
    assert.equal(nudge.sweepCodexNudges(), 0);
    lanes.deleteLane(lane.id);
  });

  it("never nudges a stale detection (past the detection TTL)", () => {
    const cwd = os.tmpdir();
    const lane = makeCodexLane({ cwd: `${cwd}/nudge-c` });
    backdateDetection(lane.id, 10); // past the default 5 min TTL
    assert.equal(nudge.sweepCodexNudges(), 0);
    lanes.deleteLane(lane.id);
  });

  it("never nudges a claude lane", () => {
    const cwd = os.tmpdir();
    const lane = lanes.createLane({ title: "cc", cwd: `${cwd}/nudge-d`, tool: "claude" });
    lanes.updateLane(lane.id, { run_id: `ccam-lane-${lane.id}` });
    assert.equal(nudge.sweepCodexNudges(), 0);
    lanes.deleteLane(lane.id);
  });

  it("never nudges a lane with no live run", () => {
    const cwd = os.tmpdir();
    const lane = lanes.createLane({ title: "cx", cwd: `${cwd}/nudge-e`, tool: "codex" });
    lanes.recordDetection(lane.id, { nodeId: "tests", signal: "npm run test:server" });
    backdateDetection(lane.id, 3);
    assert.equal(nudge.sweepCodexNudges(), 0);
    lanes.deleteLane(lane.id);
  });

  it("never types into a pane sitting at a bare shell prompt", () => {
    const cwd = os.tmpdir();
    const lane = makeCodexLane({ cwd: `${cwd}/nudge-f` });
    backdateDetection(lane.id, 3);
    tmux.__setExecImpl((args) => {
      calls.push(args);
      if (args[0] === "display-message") return "bash";
      return "";
    });
    assert.equal(nudge.sweepCodexNudges(), 0);
    lanes.deleteLane(lane.id);
  });

  it("nudges again once the target detected stage changes, after a prior nudge", () => {
    const cwd = os.tmpdir();
    const lane = makeCodexLane({ cwd: `${cwd}/nudge-g` });
    backdateDetection(lane.id, 3);
    assert.equal(nudge.sweepCodexNudges(), 1);

    // Detection advances to a later node; forward-only recordDetection accepts it.
    lanes.recordDetection(lane.id, { nodeId: "review", signal: "gh pr create" });
    backdateDetection(lane.id, 3);
    assert.equal(nudge.sweepCodexNudges(), 1);
    lanes.deleteLane(lane.id);
  });
});