""" Pagermaid currency exchange rates plugin. Plugin by @fruitymelon """

import asyncio, json
from json.decoder import JSONDecodeError
import urllib.request

from pagermaid import bot, log
from pagermaid.listener import listener

API = "https://api.exchangeratesapi.io/latest"
currencies = []
data = {}

inited = False

def init():
  with urllib.request.urlopen(API) as response:
    result = response.read()
    try:
      global data
      data = json.loads(result)
      data["rates"][data["base"]] = 1.0
      for key in list(enumerate(data["rates"])):
        currencies.append(key[1])
      currencies.sort()
    except JSONDecodeError as e:
      raise e
    global inited
    inited = True

init()

@listener(is_plugin=True, outgoing=True, command="rate",
          description="Currency exchange rate plugin.",
          parameters="<FROM> <TO>")
async def rate(context):
  while not inited:
    await asyncio.sleep(1)
  if not context.parameter:
    await context.edit(f"This is the currency exchange rate plugin.\n\nUsage: `-rate <FROM> <TO>`\n\nAvailable currencies: {', '.join(currencies)}")
    return
  if len(context.parameter) != 2:
    await context.edit(f"Usage: `-rate <FROM> <TO>`\n\n`{', '.join(currencies)}`")
    return
  FROM = context.parameter[0].upper().strip()
  TO = context.parameter[1].upper().strip()
  if currencies.count(FROM) == 0:
    await context.edit(f"Currency type {FROM} is not supported. Choose one among `{', '.join(currencies)}` instead.")
    return
  if currencies.count(TO) == 0:
    await context.edit(f"Currency type {TO} is not supported. Choose one among `{', '.join(currencies)}` instead.")
    return
  await context.edit(f'{FROM} : {TO} = 1 : {int(10000*data["rates"][FROM]/data["rates"][TO])/10000}')