# -*- coding: utf-8 -*-

# Copyright (c) 2019-2023 tecnovert
# Distributed under the MIT software license, see the accompanying
# file LICENSE or http://www.opensource.org/licenses/mit-license.php.

import json


class Explorer:
    def __init__(self, swapclient, coin_type, base_url):
        self.swapclient = swapclient
        self.coin_type = coin_type
        self.base_url = base_url
        self.log = self.swapclient.log

    def readURL(self, url):
        self.log.debug("Explorer url: {}".format(url))
        return self.swapclient.readURL(url)


class ExplorerInsight(Explorer):
    def getChainHeight(self):
        return json.loads(self.readURL(self.base_url + "/sync"))["blockChainHeight"]

    def getBlock(self, block_hash):
        data = json.loads(self.readURL(self.base_url + "/block/{}".format(block_hash)))
        return data

    def getTransaction(self, txid):
        data = json.loads(self.readURL(self.base_url + "/tx/{}".format(txid)))
        return data

    def getBalance(self, address):
        data = json.loads(
            self.readURL(self.base_url + "/addr/{}/balance".format(address))
        )
        return data

    def lookupUnspentByAddress(self, address):
        data = json.loads(self.readURL(self.base_url + "/addr/{}/utxo".format(address)))
        rv = []
        for utxo in data:
            rv.append(
                {
                    "txid": utxo["txid"],
                    "index": utxo["vout"],
                    "height": utxo["height"],
                    "n_conf": utxo["confirmations"],
                    "value": utxo["satoshis"],
                }
            )
        return rv


class ExplorerBitAps(Explorer):
    def getChainHeight(self):
        return json.loads(self.readURL(self.base_url + "/block/last"))["data"]["block"][
            "height"
        ]

    def getBlock(self, block_hash):
        data = json.loads(self.readURL(self.base_url + "/block/{}".format(block_hash)))
        return data

    def getTransaction(self, txid):
        data = json.loads(self.readURL(self.base_url + "/transaction/{}".format(txid)))
        return data

    def getBalance(self, address):
        data = json.loads(self.readURL(self.base_url + "/address/state/" + address))
        return data["data"]["balance"]

    def lookupUnspentByAddress(self, address):
        # Can't get unspents return only if exactly one transaction exists
        data = json.loads(
            self.readURL(self.base_url + "/address/transactions/" + address)
        )
        try:
            assert data["data"]["list"] == 1
        except Exception as ex:
            self.log.debug("Explorer error: {}".format(str(ex)))
            return None
        tx = data["data"]["list"][0]
        tx_data = json.loads(
            self.readURL(self.base_url + "/transaction/{}".format(tx["txId"]))
        )["data"]

        for i, vout in tx_data["vOut"].items():
            if vout["address"] == address:
                return [
                    {
                        "txid": tx_data["txId"],
                        "index": int(i),
                        "height": tx_data["blockHeight"],
                        "n_conf": tx_data["confirmations"],
                        "value": vout["value"],
                    }
                ]


class ExplorerChainz(Explorer):
    def getChainHeight(self):
        return int(self.readURL(self.base_url + "?q=getblockcount"))

    def lookupUnspentByAddress(self, address):
        chain_height = self.getChainHeight()
        self.log.debug("[rm] chain_height %d", chain_height)