import json
import pytest
import requests
from hashlib import sha256
from binascii import unhexlify

from apps.cli.blob import Blob
from pisa import HOST, PORT, logging
from test.simulator.utils import sha256d
from test.simulator.transaction import TX
from test.unit.conftest import generate_block
from pisa.utils.auth_proxy import AuthServiceProxy
from pisa.conf import BTC_RPC_USER, BTC_RPC_PASSWD, BTC_RPC_HOST, BTC_RPC_PORT, MAX_APPOINTMENTS

logging.getLogger().disabled = True

PISA_API = "http://{}:{}".format(HOST, PORT)
MULTIPLE_APPOINTMENTS = 10

appointments = []
locator_dispute_tx_map = {}


def generate_dummy_appointment():
    r = requests.get(url=PISA_API + '/get_block_count', timeout=5)

    current_height = r.json().get("block_count")

    dispute_tx = TX.create_dummy_transaction()
    dispute_txid = sha256d(dispute_tx)
    justice_tx = TX.create_dummy_transaction(dispute_txid)

    dummy_appointment_data = {"tx": justice_tx, "tx_id": dispute_txid, "start_time": current_height + 5,
                              "end_time": current_height + 30, "dispute_delta": 20}

    cipher = "AES-GCM-128"
    hash_function = "SHA256"

    locator = sha256(unhexlify(dispute_txid)).hexdigest()
    blob = Blob(dummy_appointment_data.get("tx"), cipher, hash_function)

    encrypted_blob = blob.encrypt((dummy_appointment_data.get("tx_id")))

    appointment = {"locator": locator, "start_time": dummy_appointment_data.get("start_time"),
                   "end_time": dummy_appointment_data.get("end_time"),
                   "dispute_delta": dummy_appointment_data.get("dispute_delta"),
                   "encrypted_blob": encrypted_blob, "cipher": cipher, "hash_function": hash_function}

    return appointment, dispute_tx


@pytest.fixture
def new_appointment():
    appointment, dispute_tx = generate_dummy_appointment()
    locator_dispute_tx_map[appointment["locator"]] = dispute_tx

    return appointment


def add_appointment(appointment):
    r = requests.post(url=PISA_API, json=json.dumps(appointment), timeout=5)

    if r.status_code == 200:
        appointments.append(appointment)

    return r


def test_add_appointment(run_api, run_bitcoind, new_appointment):
    # Properly formatted appointment
    r = add_appointment(new_appointment)
    assert (r.status_code == 200)

    # Incorrect appointment
    new_appointment["dispute_delta"] = 0
    r = add_appointment(new_appointment)
    assert (r.status_code == 400)


def test_request_appointment(new_appointment):
    # First we need to add an appointment
    r = add_appointment(new_appointment)
    assert (r.status_code == 200)

    # Next we can request it
    r = requests.get(url=PISA_API + "/get_appointment?locator=" + new_appointment["locator"])
    assert (r.status_code == 200)

    # Each locator may point to multiple appointments, check them all
    received_appointments = json.loads(r.content)

    # Take the status out and leave the received appointments ready to compare
    appointment_status = [appointment.pop("status") for appointment in received_appointments]

    # Check that the appointment is within the received appoints
    assert (new_appointment in received_appointments)

    # Check that all the appointments are being watched
    assert (all([status == "being_watched" for status in appointment_status]))


def test_add_appointment_multiple_times(new_appointment, n=MULTIPLE_APPOINTMENTS):
    # Multiple appointments with the same locator should be valid
    # DISCUSS: #34-store-identical-appointments
    for _ in range(n):
        r = add_appointment(new_appointment)
        assert (r.status_code == 200)


def test_request_multiple_appointments_same_locator(new_appointment, n=MULTIPLE_APPOINTMENTS):
    for _ in range(n):
        r = add_appointment(new_appointment)
        assert (r.status_code == 200)

    test_request_appointment(new_appointment)


def test_add_too_many_appointment(new_appointment):
    for _ in range(MAX_APPOINTMENTS-len(appointments)):
        r = add_appointment(new_appointment)
        assert (r.status_code == 200)

    r = add_appointment(new_appointment)
    assert (r.status_code == 503)


def test_get_all_appointments_watcher():
    r = requests.get(url=PISA_API + "/get_all_appointments")
    assert (r.status_code == 200 and r.reason == 'OK')

    received_appointments = json.loads(r.content)

    # Make sure there all the locators re in the watcher
    watcher_locators = [v["locator"] for k, v in received_appointments["watcher_appointments"].items()]
    local_locators = [appointment["locator"] for appointment in appointments]

    assert(set(watcher_locators) == set(local_locators))
    assert(len(received_appointments["responder_jobs"]) == 0)


def test_get_all_appointments_responder():
    # Trigger all disputes
    bitcoin_cli = AuthServiceProxy("http://%s:%s@%s:%d" % (BTC_RPC_USER, BTC_RPC_PASSWD, BTC_RPC_HOST, BTC_RPC_PORT))

    locators = [appointment["locator"] for appointment in appointments]
    for locator, dispute_tx in locator_dispute_tx_map.items():
        if locator in locators:
            bitcoin_cli.sendrawtransaction(dispute_tx)

    # Wait a bit for them to get confirmed
    generate_block()

    # Get all appointments
    r = requests.get(url=PISA_API + "/get_all_appointments")
    received_appointments = json.loads(r.content)

    # Make sure there is not pending locator in the watcher
    responder_jobs = [v["locator"] for k, v in received_appointments["responder_jobs"].items()]
    local_locators = [appointment["locator"] for appointment in appointments]

    assert (set(responder_jobs) == set(local_locators))
    assert (len(received_appointments["watcher_appointments"]) == 0)