#!/usr/bin/env python

# Copyright 2014 Hewlett-Packard Development Company, L.P.
# Copyright 2014 Rackspace Australia
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.

import asyncio
import threading
import os
import json
import urllib
import time
import socket

import zuul.web

from tests.base import ZuulTestCase, FIXTURE_DIR


class FakeConfig(object):

    def __init__(self, config):
        self.config = config or {}

    def has_option(self, section, option):
        return option in self.config.get(section, {})

    def get(self, section, option):
        return self.config.get(section, {}).get(option)


class BaseTestWeb(ZuulTestCase):
    tenant_config_file = 'config/single-tenant/main.yaml'
    config_ini_data = {}

    def setUp(self):
        super(BaseTestWeb, self).setUp()
        self.executor_server.hold_jobs_in_build = True
        A = self.fake_gerrit.addFakeChange('org/project', 'master', 'A')
        A.addApproval('Code-Review', 2)
        self.fake_gerrit.addEvent(A.addApproval('Approved', 1))
        B = self.fake_gerrit.addFakeChange('org/project1', 'master', 'B')
        B.addApproval('Code-Review', 2)
        self.fake_gerrit.addEvent(B.addApproval('Approved', 1))
        self.waitUntilSettled()

        self.zuul_ini_config = FakeConfig(self.config_ini_data)
        # Start the web server
        self.web = zuul.web.ZuulWeb(
            listen_address='127.0.0.1', listen_port=0,
            gear_server='127.0.0.1', gear_port=self.gearman_server.port,
            info=zuul.model.WebInfo.fromConfig(self.zuul_ini_config)
        )
        loop = asyncio.new_event_loop()
        loop.set_debug(True)
        ws_thread = threading.Thread(target=self.web.run, args=(loop,))
        ws_thread.start()
        self.addCleanup(loop.close)
        self.addCleanup(ws_thread.join)
        self.addCleanup(self.web.stop)

        self.host = 'localhost'
        # Wait until web server is started
        while True:
            time.sleep(0.1)
            if self.web.server is None:
                continue
            self.port = self.web.server.sockets[0].getsockname()[1]
            print(self.host, self.port)
            try:
                with socket.create_connection((self.host, self.port)):
                    break
            except ConnectionRefusedError:
                pass

    def tearDown(self):
        self.executor_server.hold_jobs_in_build = False
        self.executor_server.release()
        self.waitUntilSettled()
        super(BaseTestWeb, self).tearDown()


class TestWeb(BaseTestWeb):

    def test_web_status(self):
        "Test that we can retrieve JSON status info"
        self.executor_server.hold_jobs_in_build = True
        A = self.fake_gerrit.addFakeChange('org/project', 'master', 'A')
        A.addApproval('Code-Review', 2)
        self.fake_gerrit.addEvent(A.addApproval('Approved', 1))
        self.waitUntilSettled()

        self.executor_server.release('project-merge')
        self.waitUntilSettled()

        req = urllib.request.Request(
            "http://localhost:%s/tenant-one/status" % self.port)
        f = urllib.request.urlopen(req)
        headers = f.info()
        self.assertIn('Content-Length', headers)
        self.assertIn('Content-Type', headers)
        self.assertEqual(
            'application/json; charset=utf-8', headers['Content-Type'])
        self.assertIn('Access-Control-Allow-Origin', headers)
        self.assertIn('Cache-Control', headers)
        self.assertIn('Last-Modified', headers)
        data = f.read().decode('utf8')

        self.executor_server.hold_jobs_in_build = False
        self.executor_server.release()
        self.waitUntilSettled()

        data = json.loads(data)
        status_jobs = []
        for p in data['pipelines']:
            for q in p['change_queues']:
                if p['name'] in ['gate', 'conflict']:
                    self.assertEqual(q['window'], 20)
                else:
                    self.assertEqual(q['window'], 0)
                for head in q['heads']:
                    for change in head:
                        self.assertTrue(change['active'])
                        self.assertIn(change['id'], ('1,1', '2,1', '3,1'))
                        for job in change['jobs']:
                            status_jobs.append(job)
        self.assertEqual('project-merge', status_jobs[0]['name'])
        # TODO(mordred) pull uuids from self.builds
        self.assertEqual(
            'stream.html?uuid={uuid}&logfile=console.log'.format(
                uuid=status_jobs[0]['uuid']),
            status_jobs[0]['url'])
        self.assertEqual(
            'finger://{hostname}/{uuid}'.format(
                hostname=self.executor_server.hostname,
                uuid=status_jobs[0]['uuid']),
            status_jobs[0]['finger_url'])
        # TOOD(mordred) configure a success-url on the base job
        self.assertEqual(
            'finger://{hostname}/{uuid}'.format(
                hostname=self.executor_server.hostname,
                uuid=status_jobs[0]['uuid']),
            status_jobs[0]['report_url'])
        self.assertEqual('project-test1', status_jobs[1]['name'])
        self.assertEqual(
            'stream.html?uuid={uuid}&logfile=console.log'.format(
                uuid=status_jobs[1]['uuid']),
            status_jobs[1]['url'])
        self.assertEqual(
            'finger://{hostname}/{uuid}'.format(
                hostname=self.executor_server.hostname,
                uuid=status_jobs[1]['uuid']),
            status_jobs[1]['finger_url'])
        self.assertEqual(
            'finger://{hostname}/{uuid}'.format(
                hostname=self.executor_server.hostname,
                uuid=status_jobs[1]['uuid']),
            status_jobs[1]['report_url'])

        self.assertEqual('project-test2', status_jobs[2]['name'])
        self.assertEqual(
            'stream.html?uuid={uuid}&logfile=console.log'.format(
                uuid=status_jobs[2]['uuid']),
            status_jobs[2]['url'])
        self.assertEqual(
            'finger://{hostname}/{uuid}'.format(
                hostname=self.executor_server.hostname,
                uuid=status_jobs[2]['uuid']),
            status_jobs[2]['finger_url'])
        self.assertEqual(
            'finger://{hostname}/{uuid}'.format(
                hostname=self.executor_server.hostname,
                uuid=status_jobs[2]['uuid']),
            status_jobs[2]['report_url'])

        # check job dependencies
        self.assertIsNotNone(status_jobs[0]['dependencies'])
        self.assertIsNotNone(status_jobs[1]['dependencies'])
        self.assertIsNotNone(status_jobs[2]['dependencies'])
        self.assertEqual(len(status_jobs[0]['dependencies']), 0)
        self.assertEqual(len(status_jobs[1]['dependencies']), 1)
        self.assertEqual(len(status_jobs[2]['dependencies']), 1)
        self.assertIn('project-merge', status_jobs[1]['dependencies'])
        self.assertIn('project-merge', status_jobs[2]['dependencies'])

    def test_web_bad_url(self):
        # do we 404 correctly
        req = urllib.request.Request(
            "http://localhost:%s/status/foo" % self.port)
        self.assertRaises(urllib.error.HTTPError, urllib.request.urlopen, req)

    def test_web_find_change(self):
        # can we filter by change id
        req = urllib.request.Request(
            "http://localhost:%s/tenant-one/status/change/1,1" % self.port)
        f = urllib.request.urlopen(req)
        data = json.loads(f.read().decode('utf8'))

        self.assertEqual(1, len(data), data)
        self.assertEqual("org/project", data[0]['project'])

        req = urllib.request.Request(
            "http://localhost:%s/tenant-one/status/change/2,1" % self.port)
        f = urllib.request.urlopen(req)
        data = json.loads(f.read().decode('utf8'))

        self.assertEqual(1, len(data), data)
        self.assertEqual("org/project1", data[0]['project'], data)

    def test_web_keys(self):
        with open(os.path.join(FIXTURE_DIR, 'public.pem'), 'rb') as f:
            public_pem = f.read()

        req = urllib.request.Request(
            "http://localhost:%s/tenant-one/org/project.pub" %
            self.port)
        f = urllib.request.urlopen(req)
        self.assertEqual(f.read(), public_pem)

    def test_web_404_on_unknown_tenant(self):
        req = urllib.request.Request(
            "http://localhost:{}/non-tenant/status".format(self.port))
        e = self.assertRaises(
            urllib.error.HTTPError, urllib.request.urlopen, req)
        self.assertEqual(404, e.code)


class TestInfo(BaseTestWeb):

    def setUp(self):
        super(TestInfo, self).setUp()
        web_config = self.config_ini_data.get('web', {})
        self.websocket_url = web_config.get('websocket_url')
        self.stats_url = web_config.get('stats_url')
        statsd_config = self.config_ini_data.get('statsd', {})
        self.stats_prefix = statsd_config.get('prefix')

    def test_info(self):
        req = urllib.request.Request(
            "http://localhost:%s/info" % self.port)
        f = urllib.request.urlopen(req)
        info = json.loads(f.read().decode('utf8'))
        self.assertEqual(
            info, {
                "info": {
                    "endpoint": "http://localhost:%s" % self.port,
                    "capabilities": {
                        "job_history": False
                    },
                    "stats": {
                        "url": self.stats_url,
                        "prefix": self.stats_prefix,
                        "type": "graphite",
                    },
                    "websocket_url": self.websocket_url,
                }
            })

    def test_tenant_info(self):
        req = urllib.request.Request(
            "http://localhost:%s/tenant-one/info" % self.port)
        f = urllib.request.urlopen(req)
        info = json.loads(f.read().decode('utf8'))
        self.assertEqual(
            info, {
                "info": {
                    "endpoint": "http://localhost:%s" % self.port,
                    "tenant": "tenant-one",
                    "capabilities": {
                        "job_history": False
                    },
                    "stats": {
                        "url": self.stats_url,
                        "prefix": self.stats_prefix,
                        "type": "graphite",
                    },
                    "websocket_url": self.websocket_url,
                }
            })


class TestWebSocketInfo(TestInfo):

    config_ini_data = {
        'web': {
            'websocket_url': 'wss://ws.example.com'
        }
    }


class TestGraphiteUrl(TestInfo):

    config_ini_data = {
        'statsd': {
            'prefix': 'example'
        },
        'web': {
            'stats_url': 'https://graphite.example.com',
        }
    }