#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# Copyright (c) 2019-2023 tecnovert
# Copyright (c) 2024 The Basicswap developers
# Distributed under the MIT software license, see the accompanying
# file LICENSE or http://www.opensource.org/licenses/mit-license.php.

"""
export TEST_PATH=/tmp/test_basicswap
mkdir -p ${TEST_PATH}/bin
cp -r ~/tmp/basicswap_bin/* ${TEST_PATH}/bin
export PYTHONPATH=$(pwd)
python tests/basicswap/test_reload.py

"""

import os
import sys
import logging
import unittest
import traceback
import threading
import multiprocessing
from unittest.mock import patch

from basicswap.rpc import (
    callrpc_cli,
)
from tests.basicswap.util import (
    read_json_api,
    post_json_api,
    waitForServer,
)
from tests.basicswap.common import (
    waitForNumOffers,
    waitForNumBids,
    waitForNumSwapping,
)
from tests.basicswap.common_xmr import (
    prepare_nodes,
)
import basicswap.bin.run as runSystem

TEST_PATH = os.path.expanduser(os.getenv("TEST_PATH", "~/test_basicswap1"))
delay_event = threading.Event()

logger = logging.getLogger()
logger.level = logging.DEBUG
if not len(logger.handlers):
    logger.addHandler(logging.StreamHandler(sys.stdout))


def btcRpc(client_no, cmd):
    bin_path = os.path.join(TEST_PATH, "bin", "bitcoin")
    data_path = os.path.join(TEST_PATH, "client{}".format(client_no), "bitcoin")
    return callrpc_cli(bin_path, data_path, "regtest", cmd, "bitcoin-cli")


def partRpc(client_no, cmd):
    bin_path = os.path.join(TEST_PATH, "bin", "particl")
    data_path = os.path.join(TEST_PATH, "client{}".format(client_no), "particl")
    return callrpc_cli(bin_path, data_path, "regtest", cmd, "particl-cli")


def updateThread():
    btc_addr = btcRpc(0, "getnewaddress mining_addr bech32")

    while not delay_event.is_set():
        btcRpc(0, "generatetoaddress {} {}".format(1, btc_addr))
        delay_event.wait(5)


class Test(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        super(Test, cls).setUpClass()

        prepare_nodes(3, "bitcoin")

    def run_thread(self, client_id):
        client_path = os.path.join(TEST_PATH, "client{}".format(client_id))
        testargs = [
            "basicswap-run",
            "-datadir=" + client_path,
            "-regtest",
            f"-logprefix=BSX{client_id}",
        ]
        with patch.object(sys, "argv", testargs):
            runSystem.main()

    def wait_for_node_height(self, port=12701, wallet_ticker="part", wait_for_blocks=3):
        # Wait for height, or sequencelock is thrown off by genesis blocktime
        logging.info(
            f"Waiting for {wallet_ticker} chain height {wait_for_blocks} at port {port}",
        )
        for i in range(60):
            if delay_event.is_set():
                raise ValueError("Test stopped.")
            try:
                wallet = read_json_api(port, f"wallets/{wallet_ticker}")
                node_blocks = wallet["blocks"]
                print(f"{wallet_ticker} node_blocks {node_blocks}")
                if node_blocks >= wait_for_blocks:
                    return
            except Exception as e:
                print("Error reading wallets", str(e))
            delay_event.wait(1)
        raise ValueError(
            f"wait_for_node_height timed out, {wallet_ticker}, {wait_for_blocks}, {port}"
        )

    def test_reload(self):
        global stop_test
        processes = []

        for i in range(3):
            processes.append(multiprocessing.Process(target=self.run_thread, args=(i,)))
            processes[-1].start()

        try:
            waitForServer(delay_event, 12700)
            partRpc(0, "reservebalance false")  # WakeThreadStakeMiner
            self.wait_for_node_height()

            num_blocks = 500
            btc_addr = btcRpc(1, "getnewaddress mining_addr bech32")
            logging.info("Mining %d Bitcoin blocks to %s", num_blocks, btc_addr)
            btcRpc(1, "generatetoaddress {} {}".format(num_blocks, btc_addr))
            self.wait_for_node_height(12700, "btc", num_blocks)

            data = {
                "addr_from": "-1",
                "coin_from": "PART",
                "coin_to": "2",
                "amt_from": "1",
                "amt_to": "1",
                "lockhrs": "24",
            }

            offer_id = post_json_api(12700, "offers/new", data)["offer_id"]
            summary = read_json_api(12700)
            assert summary["num_sent_offers"] == 1
        except Exception:
            traceback.print_exc()

        sentoffers = read_json_api(12700, "sentoffers", {"active": True})
        assert sentoffers[0]["offer_id"] == offer_id

        logger.info("Waiting for offer:")
        waitForNumOffers(delay_event, 12701, 1)

        offers = read_json_api(12701, "offers")
        offer = offers[0]

        data = {"offer_id": offer["offer_id"], "amount_from": offer["amount_from"]}

        post_json_api(12701, "bids/new", data)

        waitForNumBids(delay_event, 12700, 1)

        bids = read_json_api(12700, "bids")
        bid = bids[0]

        data = {"accept": True}
        rv = post_json_api(12700, "bids/{}".format(bid["bid_id"]), data)
        assert rv["bid_state"] == "Accepted"

        waitForNumSwapping(delay_event, 12701, 1)

        logger.info("Restarting client:")
        c1 = processes[1]
        c1.terminate()
        c1.join()
        processes[1] = multiprocessing.Process(target=self.run_thread, args=(1,))
        processes[1].start()

        waitForServer(delay_event, 12701)
        rv = read_json_api(12701)
        assert rv["num_swapping"] == 1

        update_thread = threading.Thread(target=updateThread)
        update_thread.start()

        logger.info("Completing swap:")
        for i in range(240):
            delay_event.wait(5)

            rv = read_json_api(12700, "bids/{}".format(bid["bid_id"]))
            if rv["bid_state"] == "Completed":
                break
        assert rv["bid_state"] == "Completed"

        delay_event.set()
        update_thread.join()
        for p in processes:
            p.terminate()
        for p in processes:
            p.join()


if __name__ == "__main__":
    unittest.main()