/**
 * @file Tests server/lib/opencode-usage.js and the OpenCode branch of the
 * transcript routes — OpenCode sessions from its SQLite store: a root session
 * created as `tool = 'opencode'` with its title, cwd, model and per-model
 * tokens (its subagent session's included, reasoning counted as output), a
 * subagent row per child session, an unchanged store never re-read, a
 * session the user deleted staying deleted until it is updated, and the
 * conversation (text, reasoning, tool call + result) in the Claude
 * transcript shape. The store is a temp file with the tables and columns
 * opencode 1.19 writes.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

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

const ROOT = fs.mkdtempSync(path.join(os.tmpdir(), "agenthub-opencode-usage-"));
process.env.DASHBOARD_DB_PATH = path.join(ROOT, "dashboard.db");
process.env.CLAUDE_HOME = path.join(ROOT, "claude");
process.env.AGENTHUB_OPENCODE_DIR = path.join(ROOT, "opencode");

const { describe, it, before, after } = require("node:test");
const assert = require("node:assert/strict");
const { db, Database } = require("../db");
const oc = require("../lib/opencode-usage");
const { createApp, startServer } = require("../index");

const ID = "ses_eac8393b4ffeEz26VGbeyq8sir";
const CHILD = "ses_eac8393b4fffChildSession01";
const CWD = path.join(fs.realpathSync(ROOT), "work");
const STORE = path.join(process.env.AGENTHUB_OPENCODE_DIR, "opencode.db");
const T0 = Date.parse("2026-10-19T09:27:05.000Z");

let server;
let BASE;
after(() => {
  server?.close();
  fs.rmSync(ROOT, { recursive: true, force: true });
});

function withStore(fn) {
  const conn = new Database(STORE);
  try {
    fn(conn);
  } finally {
    conn.close();
  }
}

const assistant = (model, tokens) => JSON.stringify({ role: "assistant", modelID: model, tokens });
const tokens = (input, output, reasoning = 0, read = 0, write = 0) => ({
  input,
  output,
  reasoning,
  cache: { read, write },
});

before(async () => {
  fs.mkdirSync(path.dirname(STORE), { recursive: true });
  withStore((c) => {
    c.exec(`
      CREATE TABLE session (id TEXT PRIMARY KEY, project_id TEXT NOT NULL, parent_id TEXT,
        slug TEXT NOT NULL, directory TEXT NOT NULL, title TEXT NOT NULL, version TEXT NOT NULL,
        model TEXT, time_created INTEGER NOT NULL, time_updated INTEGER NOT NULL, time_archived INTEGER);
      CREATE TABLE message (id TEXT PRIMARY KEY, session_id TEXT NOT NULL, time_created INTEGER NOT NULL,
        time_updated INTEGER NOT NULL, data TEXT NOT NULL);
      CREATE TABLE part (id TEXT PRIMARY KEY, message_id TEXT NOT NULL, session_id TEXT NOT NULL,
        time_created INTEGER NOT NULL, time_updated INTEGER NOT NULL, data TEXT NOT NULL);
    `);
    const s = c.prepare(
      "INSERT INTO session (id, project_id, parent_id, slug, directory, title, version, model, time_created, time_updated) VALUES (?, 'global', ?, 'x', ?, ?, '1.19.3', ?, ?, ?)"
    );
    s.run(ID, null, CWD, "Fix the login bug", '{"id":"claude-sonnet-4-5","providerID":"anthropic"}', T0, T0 + 5000);
    s.run(CHILD, ID, CWD, "Explore auth (@explore subagent)", null, T0 + 1000, T0 + 3000);
    const m = c.prepare("INSERT INTO message VALUES (?, ?, ?, ?, ?)");
    m.run("msg_1", ID, T0 + 10, T0 + 10, JSON.stringify({ role: "user" }));
    m.run("msg_2", ID, T0 + 20, T0 + 20, assistant("claude-sonnet-4-5", tokens(100, 20, 5, 1000, 50)));
    m.run("msg_3", CHILD, T0 + 1100, T0 + 1100, JSON.stringify({ role: "user" }));
    m.run("msg_4", CHILD, T0 + 1200, T0 + 1200, assistant("claude-haiku-4-5", tokens(10, 4)));
    const p = c.prepare("INSERT INTO part VALUES (?, ?, ?, ?, ?, ?)");
    p.run("prt_1", "msg_1", ID, T0 + 11, T0 + 11, JSON.stringify({ type: "text", text: "Fix the login bug" }));
    p.run("prt_2", "msg_2", ID, T0 + 21, T0 + 21, JSON.stringify({ type: "reasoning", text: "Look first" }));
    p.run(
      "prt_3",
      "msg_2",
      ID,
      T0 + 22,
      T0 + 22,
      JSON.stringify({
        type: "tool",
        tool: "read",
        callID: "call_1",
        state: { status: "completed", input: { filePath: "auth.ts" }, output: "export {}" },
      })
    );
    p.run("prt_4", "msg_2", ID, T0 + 23, T0 + 23, JSON.stringify({ type: "step-start" }));
    p.run("prt_5", "msg_3", CHILD, T0 + 1101, T0 + 1101, JSON.stringify({ type: "text", text: "Explore auth" }));
    p.run("prt_6", "msg_4", CHILD, T0 + 1201, T0 + 1201, JSON.stringify({ type: "text", text: "Found it" }));
  });
  server = await startServer(createApp(), 0);
  BASE = `http://127.0.0.1:${server.address().port}`;
});

const sessionRow = () => db.prepare("SELECT * FROM sessions WHERE id = ?").get(ID);

describe("opencode usage ingest", () => {
  it("creates the root session with its title, cwd, model and its tree's tokens", async () => {
    const r = await oc.ingestOpencodeUsage({ now: T0 + 600_000 });
    assert.equal(r.files, 1);
    const s = sessionRow();
    assert.equal(s.tool, "opencode");
    assert.equal(s.name, "Fix the login bug");
    assert.equal(s.cwd, CWD);
    assert.equal(s.model, "claude-sonnet-4-5");
    assert.equal(s.status, "completed");
    assert.equal(db.prepare("SELECT 1 FROM sessions WHERE id = ?").get(CHILD), undefined);
    const usage = db
      .prepare(
        "SELECT model, input_tokens, output_tokens, cache_read_tokens, cache_write_tokens FROM token_usage WHERE session_id = ? ORDER BY model"
      )
      .all(ID);
    assert.deepEqual(usage, [
      { model: "claude-haiku-4-5", input_tokens: 10, output_tokens: 4, cache_read_tokens: 0, cache_write_tokens: 0 },
      { model: "claude-sonnet-4-5", input_tokens: 100, output_tokens: 25, cache_read_tokens: 1000, cache_write_tokens: 50 },
    ]);
    const agent = db.prepare("SELECT * FROM agents WHERE id = ?").get(`opencode-${CHILD}`);
    assert.equal(agent.session_id, ID);
    assert.equal(agent.type, "subagent");
    assert.equal(agent.name, "Explore auth (@explore subagent)");
    assert.equal(agent.status, "completed");
  });

  it("leaves an unchanged store unread", async () => {
    const r = await oc.ingestOpencodeUsage({ now: T0 + 600_000 });
    assert.equal(r.files, 0);
  });

  it("maps the store to the transcript shape, and lists the subagent's", async () => {
    const list = await (await fetch(`${BASE}/api/sessions/${ID}/transcripts`)).json();
    assert.deepEqual(
      list.transcripts.map((t) => [t.id, t.type, t.db_agent_id]),
      [
        ["main", "main", null],
        [CHILD, "subagent", `opencode-${CHILD}`],
      ]
    );
    const body = await (await fetch(`${BASE}/api/sessions/${ID}/transcript`)).json();
    assert.deepEqual(
      body.messages.map((m) => [m.type, m.sender, m.content.map((c) => c.type).join("+")]),
      [
        ["user", "user", "text"],
        ["assistant", "assistant", "thinking+tool_use"],
        ["user", "tool", "tool_result"],
      ]
    );
    assert.equal(body.messages[2].content[0].output, "export {}");
    assert.equal(body.last_line, 3);
    const tail = await (await fetch(`${BASE}/api/sessions/${ID}/transcript?after=2`)).json();
    assert.equal(tail.messages.length, 1);
    const sub = await (
      await fetch(`${BASE}/api/sessions/${ID}/transcript?agent_id=${CHILD}`)
    ).json();
    assert.deepEqual(
      sub.messages.map((m) => [m.sender, m.content[0].text]),
      [
        ["orchestrator", "Explore auth"],
        ["assistant", "Found it"],
      ]
    );
  });

  it("keeps a deleted session deleted until OpenCode updates it", async () => {
    db.prepare("DELETE FROM sessions WHERE id = ?").run(ID);
    const bump = (t) => {
      withStore((c) => c.prepare("UPDATE session SET title = title WHERE id = ?").run(ID));
      const at = new Date(t);
      fs.utimesSync(STORE, at, at);
    };
    bump(Date.now() + 5000);
    await oc.ingestOpencodeUsage({ now: T0 + 600_000 });
    assert.equal(sessionRow(), undefined);
    withStore((c) => c.prepare("UPDATE session SET time_updated = ? WHERE id = ?").run(T0 + 9000, ID));
    fs.utimesSync(STORE, new Date(Date.now() + 10_000), new Date(Date.now() + 10_000));
    await oc.ingestOpencodeUsage({ now: T0 + 600_000 });
    assert.equal(sessionRow()?.tool, "opencode");
  });
});