# backend/tests/test_api_mail.py
def _flatten_titles(nodes):
    out = []
    for n in nodes:
        out.append(n["title"])
        out += _flatten_titles(n.get("children", []))
    return out


def test_list_accounts(client):
    r = client.get("/api/mail/accounts")
    assert [a["id"] for a in r.json()] == ["work", "personal", "side"]
    assert r.json()[0]["tone"] == "coral"


def test_list_mail_count(client):
    rows = client.get("/api/mail").json()
    assert len(rows) == 8
    assert rows[0]["from"] == "hyunwoo"  # alias


def test_email_detail_marks_read(client):
    assert client.get("/api/mail/m1").json()["read"] is True
    assert client.get("/api/mail/m1").json()["from"] == "hyunwoo"


def test_extract_task_creates_task(client):
    r = client.post("/api/mail/m1/extract", json={"kind": "task", "index": 0})
    body = r.json()
    assert body["kind"] == "task"
    assert body["task"]["project_id"] == "onb-wire"
    assert body["task"]["prio"] == "높음"
    assert "온보딩 시안 v3 피드백 정리" in _flatten_titles(client.get("/api/tasks").json())


def test_extract_event_creates_event(client):
    r = client.post("/api/mail/m2/extract", json={"kind": "event", "index": 0})
    assert r.json()["kind"] == "event" and r.json()["event_id"]


def test_extract_all(client):
    r = client.post("/api/mail/m1/extract-all", json={})
    assert len(r.json()["created_task_ids"]) == 2
    assert r.json()["filed_project"] == "온보딩 리디자인"


def test_reply_draft_picks_seeded(client):
    r = client.post("/api/mail/m1/reply-draft", json={"reply_index": 0})
    assert r.json()["subject"].startswith("Re: ")
    assert "금요일" in r.json()["body"]


def test_send_creates_high_risk_approval(client):
    r = client.post(
        "/api/mail/send",
        json={
            "from_account": "work",
            "to": "현우 <hyunwoo@lumi.co>",
            "subject": "Re: 온보딩",
            "body": "확인했어요",
        },
    )
    assert r.json()["status"] == "pending"
    appr = client.get(f"/api/approvals/{r.json()['approval_id']}").json()
    assert appr["risk"] == "high" and appr["source"] == "mail"


def test_m7_empty_ai(client):
    ai = client.get("/api/mail/m7").json()["ai"]
    assert ai["priority"] == "낮음" and ai["tasks"] == [] and ai["events"] == []


def test_extract_404(client):
    assert client.post("/api/mail/nope/extract", json={"kind": "task"}).status_code == 404


def test_account_filter(client):
    rows = client.get("/api/mail?account=side").json()
    assert all(r["account"] == "side" for r in rows) and len(rows) == 1  # m5