#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
海报模块配置
从项目统一配置读取，支持环境变量覆盖
"""

import os
import logging
from pathlib import Path

logger = logging.getLogger(__name__)

# 项目根目录
PROJECT_ROOT = Path(__file__).parent.parent


def _get_font_dir_from_config() -> Path:
    """从项目统一配置读取字体目录"""
    # 优先使用环境变量
    if os.environ.get("POSTER_FONT_DIR"):
        return Path(os.environ["POSTER_FONT_DIR"])
    
    # 尝试从项目配置读取
    try:
        from core.config_loader import get_config
        config = get_config()
        font_path = config.get("paths.resource.font")
        if font_path:
            # 相对路径转换为绝对路径
            if not font_path.startswith("/"):
                return PROJECT_ROOT / font_path
            return Path(font_path)
    except Exception as e:
        logger.debug(f"从统一配置读取字体路径失败: {e}")
    
    # 默认路径
    return PROJECT_ROOT / "assets" / "font"


# 字体目录
FONT_DIR = _get_font_dir_from_config()

# Emoji 字体路径 - 支持环境变量覆盖
EMOJI_FONT_PATH = Path(os.environ.get(
    "POSTER_EMOJI_FONT",
    "/usr/share/fonts/truetype/noto/NotoColorEmoji.ttf"
))

# 字体映射
FONT_FILES = {
    "title_bold": "兰亭粗黑简.TTF",
    "title_heavy": "兰亭特黑简 GBK.TTF",
    "title_poster": "华康海报体简.ttc",
    "title_cute": "字体管家棉花糖.TTF",
    "body_regular": "腾祥麦黑简.TTF",
    "handwrite": "邓玉二笔体.ttf",
}


def get_font_path(font_name: str) -> Path:
    """获取字体完整路径"""
    if font_name == "emoji":
        return EMOJI_FONT_PATH
    filename = FONT_FILES.get(font_name, FONT_FILES["body_regular"])
    return FONT_DIR / filename


def validate_fonts() -> dict:
    """验证字体文件是否存在"""
    result = {"valid": True, "missing": []}
    
    for name, filename in FONT_FILES.items():
        path = FONT_DIR / filename
        if not path.exists():
            result["valid"] = False
            result["missing"].append((name, str(path)))
    
    if not EMOJI_FONT_PATH.exists():
        result["valid"] = False
        result["missing"].append(("emoji", str(EMOJI_FONT_PATH)))
    
    return result