import os

def generate_python_sources():
    sources = {}
    for file in sorted(os.listdir("python")):
        if not file.endswith(".py"):
            continue
        key = file.split(".")[0]
        const_char_array = []
        with open("python/" + file) as f:
            # convert to char array (signed)
            for c in f.read().encode('utf-8'):
                if c < 128:
                    const_char_array.append(str(c))
                else:
                    const_char_array.append(str(c - 256))
        const_char_array.append('0')
        const_char_array = ','.join(const_char_array)
        sources[key] = '{' + const_char_array + '}'

    header = '''#pragma once
// generated by prebuild.py

namespace pkpy{
'''
    for key, value in sources.items():
        header += f'    inline const char kPythonLibs_{key}[] = {value};\n'
    header += '}\n'
    return header

# use LF line endings instead of CRLF
with open("include/pocketpy/_generated.h", "wt", encoding='utf-8', newline='\n') as f:
    f.write(generate_python_sources())