#!/usr/bin/env python3
import os

COMMENT_PREFIX = '/// '

current_method = None
current_package = None

def split_to_parts(line):
    global current_method
    global current_package
    # Line is beginning of method
    if line.startswith('def '):
        # Parse name of method from line like 'def trezor.config.get():'
        current_method = line[4:].split('(')[0]
        #print("Current method", current_method)
        
        *current_package, method_name = current_method.split('.')

        line = line.replace(current_method, method_name)
        
    yield (current_package, line)

def store_to_file(dest, parts):
    while True:
        try:
            (package, line) = parts.__next__()
        except StopIteration:
            return
    
        dir_path = os.path.abspath(os.path.join(dest, *package[:-1]))
        filename = package[-1]
        
        if not os.path.exists(dir_path):
            os.makedirs(dir_path)
            open(os.path.join(dir_path, '__init__.py'), 'w').close()
            open(os.path.join(dir_path, '.mock'), 'w').close()
        
        f = open(os.path.join(dir_path, filename + '.py'), 'a')
        f.write(line)
        f.close()

def build_module(mod_file, dest):
    if not (mod_file.endswith('.h') or mod_file.endswith('.c')):
        return

    #print(mod_file)
    for l in open(mod_file):
        if not l.startswith(COMMENT_PREFIX):
            continue
        
        l = l[len(COMMENT_PREFIX):]#.strip()
        store_to_file(dest, split_to_parts(l))
    
def build_directory(dir, dest):
    print("Building mocks for", dir, "to", dest)
    for pkg in os.listdir(dir):
        for mod in os.listdir(os.path.join(dir, pkg)):
            build_module(os.path.join(dir, pkg, mod), dest)

def clear_directory(top_dir):
    print("Clearing up directory", top_dir)
    for root, dirs, files in os.walk(top_dir, topdown=False):
        if '.mock' not in files:
            #print("Not a mock directory", root)
            continue
        for name in files:
            #print('Deleting file', os.path.join(root, name))
            os.remove(os.path.join(root, name))
        for name in dirs:
            #print('Deleting directory', os.path.join(root, name))
            os.rmdir(os.path.join(root, name))
        
if __name__ == '__main__':
    clear_directory('../mocks')
    build_directory('../extmod', '../mocks')