/**
 * @file Route tests for /api/snapshots: capture freezes a session (events
 * oldest first, stats, cost), redaction replaces paths before anything is
 * stored, rows are immutable, writes are same-origin only, and snapshots
 * survive Clear Data.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

const { describe, it, before, after } = require("node:test");
const assert = require("node:assert/strict");
const fs = require("node:fs");
const os = require("node:os");
const path = require("node:path");
const http = require("node:http");

const ROOT = fs.mkdtempSync(path.join(os.tmpdir(), "agenthub-snapshots-"));
process.env.DASHBOARD_DB_PATH = path.join(ROOT, "t.db");
process.env.CLAUDE_HOME = path.join(ROOT, ".claude");
process.env.DASHBOARD_REMOTE_SYNC_MS = "0";
process.env.DASHBOARD_LIVENESS_PROBE = "0";

const { createApp } = require("../index");
const { db } = require("../db");

const CWD = "/work/secret-project";
let server;
let base;

function request(method, p, body, headers = {}) {
  return fetch(`${base}${p}`, {
    method,
    headers: { "Content-Type": "application/json", ...headers },
    body: body === undefined ? undefined : JSON.stringify(body),
  }).then(async (r) => ({ status: r.status, body: await r.json().catch(() => null) }));
}

before(async () => {
  server = http.createServer(createApp());
  await new Promise((r) => server.listen(0, "127.0.0.1", r));
  base = `http://127.0.0.1:${server.address().port}`;
  db.prepare(
    "INSERT INTO sessions (id, name, status, cwd, started_at, transcript_path) VALUES (?, ?, 'completed', ?, ?, ?)"
  ).run("s1", "Snap me", CWD, "2026-10-01T10:00:00.000Z", `${CWD}/t.jsonl`);
  db.prepare(
    "INSERT INTO agents (id, session_id, name, type) VALUES ('a1', 's1', 'main', 'main')"
  ).run();
  const ev = db.prepare(
    "INSERT INTO events (session_id, agent_id, event_type, tool_name, summary, data, created_at) VALUES ('s1', 'a1', ?, ?, ?, ?, ?)"
  );
  ev.run("SessionStart", null, "start", JSON.stringify({ cwd: CWD }), "2026-10-01T10:00:00.000Z");
  ev.run(
    "PreToolUse",
    "Read",
    `Read ${CWD}/src/a.js`,
    JSON.stringify({
      cwd: CWD,
      tool_input: { file_path: `${CWD}/src/a.js` },
      command: `ls ${CWD}/src`,
    }),
    "2026-10-01T10:00:01.000Z"
  );
  ev.run("Stop", null, "stop", "{}", "2026-10-01T10:00:02.000Z");
  db.prepare(
    "INSERT INTO token_usage (session_id, model, input_tokens, output_tokens) VALUES ('s1', 'claude-sonnet-4-5', 1000000, 0)"
  ).run();
});

after(async () => {
  await new Promise((r) => server.close(r));
  fs.rmSync(ROOT, { recursive: true, force: true });
});

describe("/api/snapshots", () => {
  let plain;
  let redacted;

  it("freezes a session under an unguessable token", async () => {
    const r = await request("POST", "/api/snapshots", { session_id: "s1" });
    assert.equal(r.status, 201);
    plain = r.body.snapshot;
    assert.match(plain.token, /^[A-Za-z0-9_-]{32}$/);
    const got = await request("GET", `/api/snapshots/${plain.token}`);
    assert.equal(got.status, 200);
    const p = got.body.payload;
    assert.equal(p.session.id, "s1");
    assert.equal(p.session.cwd, CWD);
    assert.deepEqual(
      p.events.map((e) => e.event_type),
      ["SessionStart", "PreToolUse", "Stop"]
    );
    assert.equal(p.agents.length, 1);
    assert.equal(p.stats.total_events, 3);
    assert.ok(p.cost.total_cost > 0);
    assert.equal(p.redacted.file_paths, false);
  });

  it("redacts paths at capture", async () => {
    const r = await request("POST", "/api/snapshots", {
      session_id: "s1",
      redact: { file_paths: true },
    });
    assert.equal(r.status, 201);
    redacted = r.body.snapshot;
    const stored = db
      .prepare("SELECT payload FROM session_snapshots WHERE id = ?")
      .get(redacted.id).payload;
    assert.ok(!stored.includes(CWD), "no raw cwd in the stored row");
    const p = JSON.parse(stored);
    assert.equal(p.session.cwd, "[redacted]");
    assert.equal(p.session.transcript_path, "[redacted]");
    const read = JSON.parse(p.events[1].data);
    assert.equal(read.tool_input.file_path, "[redacted]");
    assert.equal(read.command, "ls <cwd>/src");
    assert.equal(p.events[1].summary, "Read <cwd>/src/a.js");
  });

  it("lists without payloads, newest first", async () => {
    const r = await request("GET", "/api/snapshots");
    assert.equal(r.status, 200);
    assert.deepEqual(
      r.body.snapshots.map((s) => s.id),
      [redacted.id, plain.id]
    );
    const [first] = r.body.snapshots;
    assert.equal(first.session_name, "Snap me");
    assert.equal(first.redacted, true);
    assert.equal(first.event_count, 3);
    assert.equal(first.payload, undefined);
  });

  it("refuses an update in the database", () => {
    assert.throws(
      () => db.prepare("UPDATE session_snapshots SET payload = '{}' WHERE id = ?").run(plain.id),
      /immutable/
    );
  });

  it("answers 400 / 404 on bad input", async () => {
    assert.equal((await request("POST", "/api/snapshots", {})).status, 400);
    assert.equal((await request("POST", "/api/snapshots", { session_id: "nope" })).status, 404);
    assert.equal((await request("GET", "/api/snapshots/short")).status, 404);
    assert.equal((await request("DELETE", "/api/snapshots/99999")).status, 404);
  });

  it("refuses a cross-origin write", async () => {
    const h = { Origin: "https://evil.example" };
    assert.equal((await request("POST", "/api/snapshots", { session_id: "s1" }, h)).status, 403);
    assert.equal((await request("DELETE", `/api/snapshots/${plain.id}`, undefined, h)).status, 403);
  });

  it("survives Clear Data, and deletes", async () => {
    assert.equal((await request("POST", "/api/settings/clear-data", {})).status, 200);
    const got = await request("GET", `/api/snapshots/${plain.token}`);
    assert.equal(got.status, 200);
    assert.equal(got.body.payload.session.id, "s1");
    assert.equal((await request("DELETE", `/api/snapshots/${plain.id}`)).status, 200);
    assert.equal((await request("GET", `/api/snapshots/${plain.token}`)).status, 404);
  });
});