import urllib.request
import json
import time

from i3pystatus import IntervalModule
from i3pystatus.core.util import internet, require, user_open


class Bitcoin(IntervalModule):

    """
    This module fetches and displays current Bitcoin market prices and
    optionally monitors transactions to and from a list of user-specified
    wallet addresses. Market data is pulled from the BitcoinAverage Price
    Index API <https://bitcoinaverage.com> while transaction data is pulled
    from blockchain.info <https://blockchain.info/api/blockchain_api>.

    .. rubric:: Available formatters

    * {last_price}
    * {ask_price}
    * {bid_price}
    * {daily_average}
    * {volume}
    * {status}
    * {last_tx_type}
    * {last_tx_addr}
    * {last_tx_value}
    * {balance_btc}
    * {balance_fiat}

    """

    settings = (
        ("format", "Format string used for output."),
        ("currency", "Base fiat currency used for pricing."),
        ("wallet_addresses", "List of wallet address(es) to monitor."),
        ("color", "Standard color"),
        ("colorize", "Enable color change on price increase/decrease"),
        ("color_up", "Color for price increases"),
        ("color_down", "Color for price decreases"),
        ("leftclick", "URL to visit or command to run on left click"),
        ("rightclick", "URL to visit or command to run on right click"),
        ("interval", "Update interval."),
        "status"
    )
    format = "฿ {status}{last_price}"
    currency = "USD"
    wallet_addresses = ""
    color = "#FFFFFF"
    colorize = False
    color_up = "#00FF00"
    color_down = "#FF0000"
    leftclick = "electrum"
    rightclick = "https://bitcoinaverage.com/"
    interval = 600
    status = {
        "price_up": "▲",
        "price_down": "▼",
    }

    _price_prev = 0

    def _fetch_price_data(self):
        api = "https://api.bitcoinaverage.com/ticker/global/"
        url = "{}{}".format(api, self.currency.upper())
        return json.loads(urllib.request.urlopen(url).read().decode("utf-8"))

    def _fetch_blockchain_data(self):
        api = "https://blockchain.info/multiaddr?active="
        addresses = "|".join(self.wallet_addresses)
        url = "{}{}".format(api, addresses)
        return json.loads(urllib.request.urlopen(url).read().decode("utf-8"))

    @require(internet)
    def run(self):
        price_data = self._fetch_price_data()
        fdict = {
            "daily_average": price_data["24h_avg"],
            "ask_price": price_data["ask"],
            "bid_price": price_data["bid"],
            "last_price": price_data["last"],
            "volume": price_data["volume_btc"],
        }

        if self._price_prev and fdict["last_price"] > self._price_prev:
            color = self.color_up
            fdict["status"] = self.status["price_up"]
        elif self._price_prev and fdict["last_price"] < self._price_prev:
            color = self.color_down
            fdict["status"] = self.status["price_down"]
        else:
            color = self.color
            fdict["status"] = ""
        self._price_prev = fdict["last_price"]

        if not self.colorize:
            color = self.color

        if self.wallet_addresses:
            blockchain_data = self._fetch_blockchain_data()
            wallet_data = blockchain_data["wallet"]
            balance_btc = wallet_data["final_balance"] / 100000000
            fdict["balance_btc"] = round(balance_btc, 2)
            balance_fiat = fdict["balance_btc"] * fdict["last_price"]
            fdict["balance_fiat"] = round(balance_fiat, 2)
            fdict["total_sent"] = wallet_data["total_sent"]
            fdict["total_received"] = wallet_data["total_received"]
            fdict["transactions"] = wallet_data["n_tx"]

            if fdict["transactions"]:
                last_tx = blockchain_data["txs"][0]
                fdict["last_tx_addr"] = last_tx["out"][0]["addr"]
                fdict["last_tx_value"] = last_tx["out"][0]["value"] / 100000000
                if fdict["last_tx_addr"] in self.wallet_addresses:
                    fdict["last_tx_type"] = "recv"
                else:
                    fdict["last_tx_type"] = "sent"

        self.output = {
            "full_text": self.format.format(**fdict),
            "color": color,
        }

    def on_leftclick(self):
        user_open(self.leftclick)

    def on_rightclick(self):
        user_open(self.rightclick)
