#! /usr/bin/python

import ast
import argparse
import os
import sys
import yaml

PATTERNS = []


class CallVisitor(ast.NodeVisitor):
    def visit_Call(self, node):
        if isinstance(node.func, ast.Name):
            name = node.func.id
        else:
            return

        if name == "client_path_patterns":
            PATTERNS.append(node.args[0].s)
        elif name == "client_v2_patterns":
            PATTERNS.append(node.args[0].s)


def find_patterns_in_code(input_code):
    input_ast = ast.parse(input_code)
    visitor = CallVisitor()
    visitor.visit(input_ast)


def find_patterns_in_file(filepath):
    with open(filepath) as f:
        find_patterns_in_code(f.read())


parser = argparse.ArgumentParser(description='Find url patterns.')

parser.add_argument(
    "directories", nargs='+', metavar="DIR",
    help="Directories to search for definitions"
)

args = parser.parse_args()


for directory in args.directories:
    for root, dirs, files in os.walk(directory):
        for filename in files:
            if filename.endswith(".py"):
                filepath = os.path.join(root, filename)
                find_patterns_in_file(filepath)


yaml.dump(sorted(PATTERNS), sys.stdout, default_flow_style=False)