from pathlib import Path

from app.service.offsite_fund_service import OffsiteFundService


def test_parse_eml_returns_mailbox_fields(tmp_path: Path) -> None:
    eml_path = tmp_path / "message.eml"
    eml_path.write_bytes(
        b"From: sender@example.com\r\n"
        b"To: mailbox@example.com\r\n"
        b"Subject: Fund application\r\n"
        b"Date: Fri, 11 Sep 2026 09:30:00 +0800\r\n"
        b"MIME-Version: 1.0\r\n"
        b"Content-Type: text/plain; charset=utf-8\r\n"
        b"\r\n"
        b"Please review the fund application.\r\n"
    )

    result = OffsiteFundService._parse_eml(str(eml_path))

    assert result["subject"] == "Fund application"
    assert result["sent_at"] == "2026-09-11T09:30:00+08:00"
    assert result["has_body"] is True
    assert result["body_text"] == "Please review the fund application.\r\n"


def test_parse_eml_missing_file_returns_empty_content() -> None:
    result = OffsiteFundService._parse_eml("missing/message.eml")

    assert result == {
        "subject": None,
        "sent_at": None,
        "has_body": False,
        "body_text": None,
        "body_html": None,
    }