import mock
import requests
from tests.mocks import BlobAvailabilityTracker as DummyBlobAvailabilityTracker
from tests import util
from twisted.internet import defer
from twisted.trial import unittest
from lbrynet.lbrynet_daemon import Daemon
from lbrynet.core import Session, PaymentRateManager
from lbrynet.lbrynet_daemon.Daemon import Daemon as LBRYDaemon
from lbrynet.lbrynet_daemon import ExchangeRateManager
from lbrynet import conf


class MiscTests(unittest.TestCase):
    def test_get_lbrynet_version_from_github(self):
        response = mock.create_autospec(requests.Response)
        # don't need to mock out the entire response from the api
        # but at least need 'tag_name'
        response.json.return_value = {
            "url": "https://api.github.com/repos/lbryio/lbry/releases/3685199",
            "assets_url": "https://api.github.com/repos/lbryio/lbry/releases/3685199/assets",
            "html_url": "https://github.com/lbryio/lbry/releases/tag/v0.3.8",
            "id": 3685199,
            "tag_name": "v0.3.8",
            "prerelease": False
        }
        with mock.patch('lbrynet.lbrynet_daemon.Daemon.requests') as req:
            req.get.return_value = response
            self.assertEqual('0.3.8', Daemon.get_lbrynet_version_from_github())

    def test_error_is_thrown_if_prerelease(self):
        response = mock.create_autospec(requests.Response)
        response.json.return_value = {
            "tag_name": "v0.3.8",
            "prerelease": True
        }
        with mock.patch('lbrynet.lbrynet_daemon.Daemon.requests') as req:
            req.get.return_value = response
            with self.assertRaises(Exception):
                Daemon.get_lbrynet_version_from_github()

    def test_error_is_thrown_when_version_cant_be_parsed(self):
        with self.assertRaises(Exception):
            Daemon.get_version_from_tag('garbage')


def get_test_daemon(data_rate=None, generous=True, with_fee=False):
    if data_rate is None:
        data_rate = conf.settings.data_rate

    rates = {
                'BTCLBC': {'spot': 3.0, 'ts': util.DEFAULT_ISO_TIME + 1},
                'USDBTC': {'spot': 2.0, 'ts': util.DEFAULT_ISO_TIME + 2}
            }
    daemon = LBRYDaemon(None, None)
    daemon.session = mock.Mock(spec=Session.Session)
    daemon.exchange_rate_manager = ExchangeRateManager.DummyExchangeRateManager(rates)
    base_prm = PaymentRateManager.BasePaymentRateManager(rate=data_rate)
    prm = PaymentRateManager.NegotiatedPaymentRateManager(base_prm, DummyBlobAvailabilityTracker(), generous=generous)
    daemon.session.payment_rate_manager = prm
    metadata = {
        "author": "fake author",
        "content_type": "fake/format",
        "description": "fake description",
        "license": "fake license",
        "license_url": "fake license url",
        "nsfw": False,
        "sources": {
            "lbry_sd_hash": "d2b8b6e907dde95245fe6d144d16c2fdd60c4e0c6463ec98b85642d06d8e9414e8fcfdcb7cb13532ec5454fb8fe7f280"
        },
        "thumbnail": "fake thumbnail",
        "title": "fake title",
        "ver": "0.0.3"
    }
    if with_fee:
        metadata.update({"fee": {"USD": {"address": "bQ6BGboPV2SpTMEP7wLNiAcnsZiH8ye6eA", "amount": 0.75}}})
    daemon._resolve_name = lambda _: defer.succeed(metadata)
    return daemon


class TestCostEst(unittest.TestCase):
    def setUp(self):
        util.resetTime(self)

    def test_fee_and_generous_data(self):
        size = 10000000
        correct_result = 4.5
        daemon = get_test_daemon(generous=True, with_fee=True)
        self.assertEquals(daemon.get_est_cost("test", size).result, correct_result)

    def test_fee_and_ungenerous_data(self):
        size = 10000000
        fake_fee_amount = 4.5
        data_rate = conf.settings.data_rate
        correct_result = size / 10**6 * data_rate + fake_fee_amount
        daemon = get_test_daemon(generous=False, with_fee=True)
        self.assertEquals(daemon.get_est_cost("test", size).result, correct_result)

    def test_generous_data_and_no_fee(self):
        size = 10000000
        correct_result = 0.0
        daemon = get_test_daemon(generous=True)
        self.assertEquals(daemon.get_est_cost("test", size).result, correct_result)

    def test_ungenerous_data_and_no_fee(self):
        size = 10000000
        data_rate = conf.settings.data_rate
        correct_result = size / 10**6 * data_rate
        daemon = get_test_daemon(generous=False)
        self.assertEquals(daemon.get_est_cost("test", size).result, correct_result)