from buildbot.plugins import util, steps, schedulers
from buildbot_buildslist import BuildsList
from shutil import which

__all__ = [
        "force_scheduler", "deploy_scheduler", "hook_scheduler",
        "clean_branch", "package_and_upload", "SlackStatusPush",
        "XMPPStatusPush", "NixShellCommand"
        ]

# Small helpers"
@util.renderer
def clean_branch(props):
    if props.hasProperty("branch") and len(props["branch"]) > 0:
        return props["branch"].replace("/", "_")
    else:
        return "HEAD"

def package_and_upload(package, package_dest, package_url):
    return [
            steps.ShellCommand(name="build package",
                logEnviron=False, haltOnFailure=True, workdir="source",
                command=["git", "archive", "HEAD", "-o", package]),

            steps.FileUpload(name="upload package", workersrc=package,
                workdir="source", masterdest=package_dest,
                url=package_url, mode=0o644),

            steps.ShellCommand(name="cleanup package", logEnviron=False,
                haltOnFailure=True, workdir="source", alwaysRun=True,
                command=["rm", "-f", package]),
            ]

# Steps
class NixShellCommand(steps.ShellCommand):
    def __init__(self, command=None, pure=True, nixfile=None, **kwargs):
        assert(isinstance(command, str))
        oldpath = kwargs.get("env", {}).get("PATH", None)
        if which("nix-shell", path=oldpath) is None:
            kwargs["env"] = kwargs.get("env", {})
            if isinstance(oldpath, str):
                kwargs["env"]["PATH"] = "/run/current-system/sw/bin:" + oldpath
            elif isinstance(oldpath, list):
                kwargs["env"]["PATH"] = ["/run/current-system/sw/bin"] + oldpath
        nixcommand = ["nix-shell"]
        if pure:
            nixcommand.append("--pure")
        nixcommand.append("--run")
        nixcommand.append(command)
        if nixfile is not None:
            nixcommand.append(nixfile)
        super().__init__(command=nixcommand, **kwargs)

# Schedulers
def force_scheduler(name, builders):
    return schedulers.ForceScheduler(name=name,
        label="Force build", buttonName="Force build",
        reason=util.StringParameter(name="reason", label="Reason", default="Force build"),
        codebases=[
            util.CodebaseParameter("",
                branch=util.StringParameter(
                    name="branch", label="Git reference (tag, branch)", required=True),
                revision=util.FixedParameter(name="revision", default=""),
                repository=util.FixedParameter(name="repository", default=""),
                project=util.FixedParameter(name="project", default=""),
                ),
            ],
        username=util.FixedParameter(name="username", default="Web button"),
        builderNames=builders)

def deploy_scheduler(name, builders):
    return schedulers.ForceScheduler(name=name,
        builderNames=builders,
        label="Deploy built package", buttonName="Deploy",
        username=util.FixedParameter(name="username", default="Web button"),
        codebases=[
            util.CodebaseParameter(codebase="",
                branch=util.FixedParameter(name="branch", default=""),
                revision=util.FixedParameter(name="revision", default=""),
                repository=util.FixedParameter(name="repository", default=""),
                project=util.FixedParameter(name="project", default=""))],
        reason=util.FixedParameter(name="reason", default="Deploy"),
        properties=[
            util.ChoiceStringParameter(label="Environment",
                name="environment", default="integration",
                choices=["integration", "production"]),
            BuildsList(label="Build to deploy", name="build"),
            ]
        )

def hook_scheduler(project, timer=10):
    return schedulers.AnyBranchScheduler(
            change_filter=util.ChangeFilter(category="hooks", project=project),
            name=project, treeStableTimer=timer, builderNames=["{}_build".format(project)])

# Slack/XMPP status push
from buildbot.reporters.http import HttpStatusPushBase
from twisted.internet import defer
from twisted.python import log
from buildbot.util import httpclientservice
from buildbot.reporters import utils
from buildbot.process import results
from twisted.words.protocols.jabber.jid import JID
from wokkel import client, xmppim
from functools import partial

class SlackStatusPush(HttpStatusPushBase):
    name = "SlackStatusPush"

    @defer.inlineCallbacks
    def reconfigService(self, serverUrl, **kwargs):
        yield HttpStatusPushBase.reconfigService(self, **kwargs)
        self._http = yield httpclientservice.HTTPClientService.getService(
            self.master, serverUrl)

    @defer.inlineCallbacks
    def send(self, build):
        yield utils.getDetailsForBuild(self.master, build, wantProperties=True)
        response = yield self._http.post("", json=self.format(build))
        if response.code != 200:
            log.msg("%s: unable to upload status: %s" %
                    (response.code, response.content))

    def format(self, build):
        colors = [
                "#36A64F", # success
                "#F1E903", # warnings
                "#DA0505", # failure
                "#FFFFFF", # skipped
                "#000000", # exception
                "#FFFFFF", # retry
                "#D02CA9", # cancelled
                ]

        if "environment" in build["properties"]:
            msg = "{} environment".format(build["properties"]["environment"][0])
            if "build" in build["properties"]:
                msg = "of archive {} in ".format(build["properties"]["build"][0]) + msg
        elif len(build["buildset"]["sourcestamps"][0]["branch"] or []) > 0:
            msg = "revision {}".format(build["buildset"]["sourcestamps"][0]["branch"])
        else:
            msg = "build"

        if build["complete"]:
            timedelta = int((build["complete_at"] - build["started_at"]).total_seconds())
            hours, rest = divmod(timedelta, 3600)
            minutes, seconds = divmod(rest, 60)
            if hours > 0:
                duration = "{}h {}min {}s".format(hours, minutes, seconds)
            elif minutes > 0:
                duration = "{}min {}s".format(minutes, seconds)
            else:
                duration = "{}s".format(seconds)

            text = "Build <{}|{}> of {}'s {} was {} in {}.".format(
                    build["url"], build["buildid"],
                    build["builder"]["name"],
                    msg,
                    results.Results[build["results"]],
                    duration,
                    )
            fields = [
                    {
                        "title": "Build",
                        "value": "<{}|{}>".format(build["url"], build["buildid"]),
                        "short": True,
                        },
                    {
                        "title": "Project",
                        "value": build["builder"]["name"],
                        "short": True,
                        },
                    {
                        "title": "Build status",
                        "value": results.Results[build["results"]],
                        "short": True,
                        },
                    {
                        "title": "Build duration",
                        "value": duration,
                        "short": True,
                        },
                    ]
            if "environment" in build["properties"]:
                fields.append({
                        "title": "Environment",
                        "value": build["properties"]["environment"][0],
                        "short": True,
                    })
            if "build" in build["properties"]:
                fields.append({
                        "title": "Archive",
                        "value": build["properties"]["build"][0],
                        "short": True,
                    })
            attachments = [{
                    "fallback": "",
                    "color": colors[build["results"]],
                    "fields": fields
                    }]
        else:
            text = "Build <{}|{}> of {}'s {} started.".format(
                    build["url"], build["buildid"],
                    build["builder"]["name"],
                    msg,
                    )
            attachments = []

        return {
                "username": "Buildbot",
                "icon_url": "http://docs.buildbot.net/current/_static/icon.png",
                "text": text,
                "attachments": attachments,
                }

class XMPPStatusPush(HttpStatusPushBase):
    name = "XMPPStatusPush"

    @defer.inlineCallbacks
    def reconfigService(self, password, recipients, **kwargs):
        yield HttpStatusPushBase.reconfigService(self, **kwargs)
        self.password = password
        self.recipients = recipients

    @defer.inlineCallbacks
    def send(self, build):
        yield utils.getDetailsForBuild(self.master, build, wantProperties=True)
        body = self.format(build)
        factory = client.DeferredClientFactory(JID("notify_bot@immae.fr/buildbot"), self.password)
        d = client.clientCreator(factory)
        def send_message(recipient, stream):
            message = xmppim.Message(recipient=JID(recipient), body=body)
            message.stanzaType = 'chat'
            stream.send(message.toElement())
            # To allow chaining
            return stream
        for recipient in self.recipients:
            d.addCallback(partial(send_message, recipient))
        d.addCallback(lambda _: factory.streamManager.xmlstream.sendFooter())
        d.addErrback(log.err)

    def format(self, build):
        if "environment" in build["properties"]:
            msg = "{} environment".format(build["properties"]["environment"][0])
            if "build" in build["properties"]:
                msg = "of archive {} in ".format(build["properties"]["build"][0]) + msg
        elif len(build["buildset"]["sourcestamps"][0]["branch"] or []) > 0:
            msg = "revision {}".format(build["buildset"]["sourcestamps"][0]["branch"])
        else:
            msg = "build"

        if build["complete"]:
            timedelta = int((build["complete_at"] - build["started_at"]).total_seconds())
            hours, rest = divmod(timedelta, 3600)
            minutes, seconds = divmod(rest, 60)
            if hours > 0:
                duration = "{}h {}min {}s".format(hours, minutes, seconds)
            elif minutes > 0:
                duration = "{}min {}s".format(minutes, seconds)
            else:
                duration = "{}s".format(seconds)

            text = "Build {} ( {} ) of {}'s {} was {} in {}.".format(
                    build["buildid"], build["url"],
                    build["builder"]["name"],
                    msg,
                    results.Results[build["results"]],
                    duration,
                    )
        else:
            text = "Build {} ( {} ) of {}'s {} started.".format(
                    build["buildid"], build["url"],
                    build["builder"]["name"],
                    msg,
                    )

        return text