#!/usr/bin/env python3
import json
import operator
tokens = dict()
with open('./tokens.json', 'r') as json_tokens:
  tokens = json.loads(json_tokens.read())

usefull_tokens = list()

def peek(index: int) -> dict:
    global tokens
    result = dict()
    if index < len(tokens):
      result = tokens[index]
    return result

def find_token_indicies(key: str) -> list:
    global tokens
    result = list()
    index = 0
    for token in tokens:
        if token["value"] == key:
            result.append(index)
        index = index + 1
    return result

def collect_body(index: int) -> list():
    result = list()
    token = peek(index + 1)
    if token['variant'] != "operator":
        return result
    maybe_expression = peek(index + 2)
    if maybe_expression['variant'] == 'expression':
        result.append(token)
        return result
    elif maybe_expression['variant'] == 'start_block':
        index = index + 2
        while True:
            index = index + 1
            collectable = peek(index)
            if collectable['variant'] == 'end_block':
                break
            result.append(collectable)

    return result


for index in range(0, len(tokens)):
    token = tokens[index]

    # This is a declaration
    if token['variant'] == 'type':
        maybe_signifier = peek(index + 2)
        expression = ''
        line_number = token['line_number']
        if maybe_signifier["variant"] == "signifier":
            name = maybe_signifier['value']
            for i in find_token_indicies(name):
                maybe_expression = peek(i + 2)
                if maybe_expression['variant'] == 'expression':
                    line_number = maybe_expression['line_number']
                    expression = maybe_expression['value']
                    break
            usefull_token = { "variant": "variable_declaration", "signifier": name, "type": token['value'], "line_number": line_number, "expression": expression } 
            usefull_tokens.append(usefull_token)
    if token['variant'] == 'function_declaration':
        body = collect_body(index)
        usefull_token = { "variant": "function_declaration", "signifier": token['value'], "line_number": token['line_number'], "params": token['params'] ,"body": body} 
        
        usefull_tokens.append(usefull_token)

sorted_tokens = usefull_tokens.sort(key=operator.itemgetter('line_number'))
print(json.dumps(usefull_tokens))