from __future__ import annotations

from ...types import make_issue
from .patterns import PLACEHOLDER_VALUES
from .language import detect_language_mismatch

FORM_FIELDS = {"label", "placeholder", "help_text"}


def validate_form_copy(locale_code: str, field_path: str, normalized: str):
    last_segment = field_path.split(".")[-1]
    if last_segment not in FORM_FIELDS:
        return []
    issues = []
    if normalized in PLACEHOLDER_VALUES or normalized == "":
        issues.append(make_issue("empty_form_copy", field_path, normalized))
    mismatch = detect_language_mismatch(locale_code, normalized)
    if mismatch:
        issues.append(make_issue("form_language_mismatch", field_path, mismatch["message"]))
    return issues