import json
import subprocess
from pathlib import Path


SOURCE = Path(__file__).parents[1] / "frontend" / "today-timer.js"


def test_timer_adopts_claimed_elapsed_time():
    script = SOURCE.read_text() + r"""
const values = new Map();
const storage = {
  getItem:key=>values.get(key)||null,
  setItem:(key,value)=>values.set(key,value),
};
let now = 100000;
const timer = createTodayTimer({storage, getLogin:()=> 'timmy', now:()=>now});
const adopted = timer.adopt('issue:r:42:', 90000, true);
now = 105000;
process.stdout.write(JSON.stringify({adopted, snapshot:timer.snapshot()}));
"""
    completed = subprocess.run(["node", "-e", script], check=True, capture_output=True, text=True)
    result = json.loads(completed.stdout)

    assert result == {
        "adopted": True,
        "snapshot": {"identity": "issue:r:42:", "elapsed_ms": 95000, "running": True},
    }


def test_timer_reports_durable_changes_for_session_sync():
    script = SOURCE.read_text() + r"""
const values = new Map();
const storage = {getItem:key=>values.get(key)||null,setItem:(key,value)=>values.set(key,value)};
let now = 0;
const changes = [];
const timer = createTodayTimer({
  storage, getLogin:()=> 'timmy', now:()=>now,
  onChange:snapshot=>changes.push(snapshot),
});
timer.activate('issue:r:42:');
now = 5000;
timer.pause();
process.stdout.write(JSON.stringify(changes));
"""
    completed = subprocess.run(["node", "-e", script], check=True, capture_output=True, text=True)

    assert json.loads(completed.stdout) == [
        {"identity": "issue:r:42:", "elapsed_ms": 0, "running": True},
        {"identity": "issue:r:42:", "elapsed_ms": 5000, "running": False},
    ]