import json
import subprocess
from pathlib import Path


ROOT = Path(__file__).parents[1]
MODULE = ROOT / "frontend" / "following.js"


def run(script: str) -> dict:
    harness = f"""
const createFollowing = require({json.dumps(str(MODULE))});
const state = {{ renders:[], counts:[], opened:[], requests:[] }};
const feature = createFollowing({{
  fetchJson: async path => {{
    state.requests.push(path);
    return {{revision:3,items:[{{repository:'stackchain/api',number:42,title:'Quiet issue',state:'open',updated_at:'2026-08-23T03:00:00Z',url:'https://forge.example/issue/42'}}]}};
  }},
  render: snapshot => state.renders.push(snapshot),
  onCount: count => state.counts.push(count),
  onOpen: item => state.opened.push(item),
}});
(async () => {{ {script} }})().catch(error => {{ console.error(error); process.exit(1); }});
"""
    completed = subprocess.run(["node", "-e", harness], text=True, capture_output=True, check=True)
    return json.loads(completed.stdout)


def test_following_loads_account_collection_and_opens_existing_preview():
    result = run("""
await feature.load();
feature.open(0);
process.stdout.write(JSON.stringify(state));
""")

    assert result["requests"] == ["api/v1/following"]
    assert result["counts"] == [1]
    assert result["renders"][-1]["status"] == "ready"
    assert result["renders"][-1]["items"][0]["title"] == "Quiet issue"
    assert result["opened"] == [{
        "repository": "stackchain/api",
        "number": 42,
        "title": "Quiet issue",
        "state": "open",
        "updated_at": "2026-08-23T03:00:00Z",
        "url": "https://forge.example/issue/42",
        "kind": "issue",
    }]


def test_following_opens_explicitly_but_never_becomes_work_recommendation():
    launcher = ROOT / "frontend" / "mobile-queue-launcher.js"
    script = f"""
const createLauncher = require({json.dumps(str(launcher))});
const calls = [];
const feature = createLauncher({{
  getCounts:() => ({{following:7}}),
  openFollowing:() => {{ calls.push('following'); return 'opened-following'; }},
  selectFilter:name => calls.push(name), firstAction:() => null,
  announce:() => {{}}, openFindWork:() => calls.push('find'),
}});
process.stdout.write(JSON.stringify({{opened:feature.open('following'),recommended:feature.recommend(),calls}}));
"""
    result = json.loads(subprocess.run(
        ["node", "-e", script], text=True, capture_output=True, check=True
    ).stdout)
    assert result == {
        "opened": "opened-following",
        "recommended": {"name": "find", "count": 0, "label": "Find Work"},
        "calls": ["following"],
    }