#!/usr/bin/env python3
"""简化的字体子集化脚本"""

from fontTools.ttLib import TTFont
from fontTools.subset import Subsetter
import os

# 读取字符
with open('scripts/font-chars.txt', 'r', encoding='utf-8') as f:
    text = f.read()
    chars = set(text) - {'\n', '\r', '\t', ' '}

print(f'📝 需要保留的字符数: {len(chars)}')

# 加载字体
input_font = 'public/fonts/AoyagiReisho.ttf'
font = TTFont(input_font)
original_size = os.path.getsize(input_font) / 1024 / 1024
print(f'📊 原始字体大小: {original_size:.2f} MB')

# 创建子集
print('⚙️  正在创建字体子集...')
subsetter = Subsetter()
subsetter.populate(chars)
subsetter.subset(font)

# 保存 WOFF2
output_woff2 = 'public/fonts/AoyagiReisho.woff2'
print(f'💾 正在保存 WOFF2: {output_woff2}')
font.flavor = 'woff2'
font.save(output_woff2)
font.close()

# 统计
new_size = os.path.getsize(output_woff2) / 1024 / 1024
reduction = (1 - new_size / original_size) * 100

print(f'\n✨ 优化完成!')
print(f'📊 新字体大小: {new_size:.2f} MB')
print(f'📉 减小比例: {reduction:.1f}%')
print(f'💾 节省空间: {(original_size - new_size):.2f} MB')
print(f'\n✅ 字体文件已保存到: {output_woff2}')