/**
 * @file Tests for lane-agents.js's removeStageDoc and the codex pipeline
 * cleanup it pairs with (clearCodexPipelines).
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

const { execFileSync } = require("node:child_process");
const os = require("node:os");
const path = require("node:path");
const fs = require("node:fs");

const SUITE_ROOT = fs.mkdtempSync(path.join(os.tmpdir(), "agenthub-lane-agents-"));
process.env.DASHBOARD_DB_PATH = path.join(SUITE_ROOT, "dashboard.db");
process.env.LANES_ROOT = path.join(SUITE_ROOT, "lanes");

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

const lanesLib = require("../lib/lanes");
const { removeStageDoc } = require("../lib/lane-agents");

after(() => fs.rmSync(SUITE_ROOT, { recursive: true, force: true }));

// Strip GIT_* vars a parent git hook (e.g. the pre-commit hook running this
// very suite) sets in its own environment — those leak to every child
// process and override an explicit `cwd`, so without this `git init` here
// operates on the outer repo's .git instead of this fixture's throwaway one.
// Same scrub `lanes-cli.test.js` and `worktree.js`'s own git() helper use.
const GIT_ENV = { ...process.env };
delete GIT_ENV.GIT_DIR;
delete GIT_ENV.GIT_WORK_TREE;
delete GIT_ENV.GIT_INDEX_FILE;
delete GIT_ENV.GIT_COMMON_DIR;
delete GIT_ENV.GIT_OBJECT_DIRECTORY;
delete GIT_ENV.GIT_ALTERNATE_OBJECT_DIRECTORIES;
delete GIT_ENV.GIT_PREFIX;
delete GIT_ENV.GIT_NAMESPACE;
delete GIT_ENV.GIT_CONFIG_PARAMETERS;

let laneSeq = 0;

/** Create a real git repo dir (used as a lane's cwd). */
function makeRepoDir() {
  const cwd = path.join(SUITE_ROOT, `repo-${++laneSeq}`);
  fs.mkdirSync(cwd, { recursive: true });
  execFileSync("git", ["init", "--initial-branch=main"], { cwd, stdio: "pipe", env: GIT_ENV });
  return cwd;
}

describe("codex pipeline cleanup", () => {
  const START = "<!-- agenthub:stage:start -->";
  const END = "<!-- agenthub:stage:end -->";
  const BLOCK = `${START}\n## Declare your lane stage as you work\n\nagenthub stage …\n${END}\n`;

  it("removes only the AgentHub block, keeping the user's own AGENTS.md prose", () => {
    const cwd = makeRepoDir();
    const file = path.join(cwd, "AGENTS.md");
    fs.writeFileSync(file, `# House rules\n\nNever force-push.\n\n${BLOCK}\n## More\n\nKeep me.\n`);

    assert.equal(removeStageDoc(cwd), true);
    const doc = fs.readFileSync(file, "utf8");
    assert.ok(!doc.includes(START) && !doc.includes(END));
    assert.match(doc, /Never force-push\./);
    assert.match(doc, /Keep me\./);
  });

  it("deletes an AGENTS.md that held nothing but the block", () => {
    const cwd = makeRepoDir();
    fs.writeFileSync(path.join(cwd, "AGENTS.md"), BLOCK);
    assert.equal(removeStageDoc(cwd), true);
    assert.equal(fs.existsSync(path.join(cwd, "AGENTS.md")), false);
  });

  it("leaves a file without the block, or no file at all, untouched", () => {
    const cwd = makeRepoDir();
    assert.equal(removeStageDoc(cwd), false);
    fs.writeFileSync(path.join(cwd, "AGENTS.md"), "# Mine\n");
    assert.equal(removeStageDoc(cwd), false);
    assert.equal(fs.readFileSync(path.join(cwd, "AGENTS.md"), "utf8"), "# Mine\n");
  });

  it("wipes a codex lane's stage, detection, stage log and features — and no claude lane's", () => {
    const codex = lanesLib.createLane({ title: "cx", cwd: makeRepoDir(), tool: "codex" });
    const claude = lanesLib.createLane({ title: "cc", cwd: makeRepoDir(), tool: "claude" });
    for (const lane of [codex, claude]) {
      lanesLib.setStage(lane.id, { stage: "tests", evidence: "old" });
      lanesLib.recordDetection(lane.id, { nodeId: "review", signal: "npm test" });
    }
    const { db } = require("../db");
    const insertFeature = db.prepare("INSERT INTO lane_features (lane_id, slug) VALUES (?, ?)");
    insertFeature.run(codex.id, "old-feature");
    insertFeature.run(claude.id, "kept-feature");

    assert.equal(lanesLib.clearCodexPipelines(), 1);

    const cx = lanesLib.getLane(codex.id);
    assert.equal(cx.stage, "idle");
    assert.deepEqual(cx.stages, {});
    assert.equal(cx.detected_stage, null);
    const count = (table, id) =>
      db.prepare(`SELECT COUNT(*) AS n FROM ${table} WHERE lane_id = ?`).get(id).n;
    assert.equal(count("lane_stage_events", codex.id), 0);
    assert.equal(count("lane_features", codex.id), 0);

    const cc = lanesLib.getLane(claude.id);
    assert.equal(cc.stage, "tests");
    assert.ok(count("lane_stage_events", claude.id) > 0);
    assert.equal(count("lane_features", claude.id), 1);

    assert.equal(lanesLib.clearCodexPipelines(), 0); // idempotent
  });
});