from matplotlib.font_manager import FontProperties
from PIL import ImageFont

from . import config

_global_font_cache = {}
_font_properties_cache = {}


def get_cached_font(font_path, size):
    key = (font_path, size)
    if key not in _global_font_cache:
        try:
            _global_font_cache[key] = ImageFont.truetype(font_path, size)
        except IOError as e:
            config._warn(f"字体加载失败，回退默认字体: path={font_path}, size={size}, error={e}")
            _global_font_cache[key] = ImageFont.load_default()
    return _global_font_cache[key]


def get_font_properties(font_path, size):
    key = (font_path, size)
    if key not in _font_properties_cache:
        _font_properties_cache[key] = FontProperties(fname=font_path, size=size)
    return _font_properties_cache[key]