from __future__ import annotations

"""
Reusable configuration helpers for mandelblog_content_guard.

Supported Django settings:
- CONTENT_GUARD_STRICT: bool
- CONTENT_GUARD_BLOCK_MEDIUM: bool
- CONTENT_GUARD_LOCALES: list[str]
- CONTENT_GUARD_REWRITE_ENABLED: bool
- CONTENT_GUARD_REWRITE_BACKEND: dotted path | None
"""

from django.conf import settings

DEFAULT_LOCALES = ["nl", "en", "de", "fr", "es", "it", "pt", "ru"]

SEVERITY = {
    "CRITICAL": "block",
    "HIGH": "block",
    "MEDIUM": "warn",
    "LOW": "log",
}

ISSUE_LEVELS = {
    "known_bad_pattern": "CRITICAL",
    "wrong_language_fragment": "CRITICAL",
    "rendered_bad_pattern": "CRITICAL",
    "rendered_wrong_language": "CRITICAL",
    "render_status": "CRITICAL",
    "language_heuristic": "CRITICAL",
    "cta_language_mismatch": "HIGH",
    "form_language_mismatch": "HIGH",
    "empty_form_copy": "HIGH",
    "placeholder_value": "HIGH",
    "rewrite_candidate": "MEDIUM",
    "weak_marketing_copy": "MEDIUM",
    "foreign_ui_label": "MEDIUM",
    "generic_badge_label": "MEDIUM",
    "mixed_locale_heading": "MEDIUM",
    "cta_tone_check": "MEDIUM",
}


def strict_mode_enabled() -> bool:
    return getattr(settings, "CONTENT_GUARD_STRICT", True)


def block_medium_enabled() -> bool:
    return getattr(settings, "CONTENT_GUARD_BLOCK_MEDIUM", False)


def audit_default_locales() -> list[str]:
    return list(getattr(settings, "CONTENT_GUARD_LOCALES", DEFAULT_LOCALES))


def rewrite_enabled() -> bool:
    return getattr(settings, "CONTENT_GUARD_REWRITE_ENABLED", True)


def get_rewrite_backend() -> str | None:
    return getattr(settings, "CONTENT_GUARD_REWRITE_BACKEND", None)


def classify_issue(issue_type: str) -> str:
    return ISSUE_LEVELS.get(issue_type, "LOW")


def severity_for_issue(issue_type: str) -> str:
    return SEVERITY[classify_issue(issue_type)]


def should_block_issue(issue_type: str) -> bool:
    level = classify_issue(issue_type)
    if level in {"CRITICAL", "HIGH"}:
        return True
    if level == "MEDIUM":
        return block_medium_enabled() and strict_mode_enabled()
    return False