# This file is part of Buildbot.  Buildbot is free software: you can
# redistribute it and/or modify it under the terms of the GNU General Public
# License as published by the Free Software Foundation, version 2.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc., 51
# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Copyright Buildbot Team Members

from __future__ import annotations

import dataclasses
from collections import UserList
from typing import TYPE_CHECKING

from twisted.internet import defer
from twisted.python import log

from buildbot.data import resultspec
from buildbot.process.properties import renderer
from buildbot.process.results import RETRY
from buildbot.util import flatten

if TYPE_CHECKING:
    from buildbot.db.buildrequests import BuildRequestModel


@defer.inlineCallbacks
def getPreviousBuild(master, build):
    # naive n-1 algorithm. Still need to define what we should skip
    # SKIP builds? forced builds? rebuilds?
    # don't hesitate to contribute improvements to that algorithm
    n = build['number'] - 1
    while n >= 0:
        prev = yield master.data.get(("builders", build['builderid'], "builds", n))

        if prev and prev['results'] != RETRY:
            return prev
        n -= 1
    return None


@defer.inlineCallbacks
def getDetailsForBuildset(
    master,
    bsid,
    want_properties=False,
    want_steps=False,
    want_previous_build=False,
    want_logs=False,
    add_logs=None,
    want_logs_content=False,
):
    # Here we will do a bunch of data api calls on behalf of the reporters
    # We do try to make *some* calls in parallel with the help of gatherResults, but don't commit
    # to much in that. The idea is to do parallelism while keeping the code readable
    # and maintainable.

    # first, just get the buildset and all build requests for our buildset id
    dl = [
        master.data.get(("buildsets", bsid)),
        master.data.get(
            ('buildrequests',), filters=[resultspec.Filter('buildsetid', 'eq', [bsid])]
        ),
    ]
    (buildset, breqs) = yield defer.gatherResults(dl)
    # next, get the bdictlist for each build request
    dl = [master.data.get(("buildrequests", breq['buildrequestid'], 'builds')) for breq in breqs]

    builds = yield defer.gatherResults(dl)
    builds = flatten(builds, types=(list, UserList))
    if builds:
        yield getDetailsForBuilds(
            master,
            buildset,
            builds,
            want_properties=want_properties,
            want_steps=want_steps,
            want_previous_build=want_previous_build,
            want_logs=want_logs,
            add_logs=add_logs,
            want_logs_content=want_logs_content,
        )

    return {"buildset": buildset, "builds": builds}


@defer.inlineCallbacks
def getDetailsForBuild(
    master,
    build,
    want_properties=False,
    want_steps=False,
    want_previous_build=False,
    want_logs=False,
    add_logs=None,
    want_logs_content=False,
):
    buildrequest = yield master.data.get(("buildrequests", build['buildrequestid']))
    buildset = yield master.data.get(("buildsets", buildrequest['buildsetid']))
    build['buildrequest'] = buildrequest
    build['buildset'] = buildset

    parentbuild = None
    parentbuilder = None
    if buildset['parent_buildid']:
        parentbuild = yield master.data.get(("builds", buildset['parent_buildid']))
        parentbuilder = yield master.data.get(("builders", parentbuild['builderid']))
    build['parentbuild'] = parentbuild
    build['parentbuilder'] = parentbuilder

    ret = yield getDetailsForBuilds(
        master,
        buildset,
        [build],
        want_properties=want_properties,
        want_steps=want_steps,
        want_previous_build=want_previous_build,
        want_logs=want_logs,
        add_logs=add_logs,
        want_logs_content=want_logs_content,
    )
    return ret


@defer.inlineCallbacks
def get_details_for_buildrequest(master, buildrequest: BuildRequestModel, build):
    buildset = yield master.data.get(("buildsets", buildrequest.buildsetid))
    builder = yield master.data.get(("builders", buildrequest.builderid))

    build['buildrequest'] = dataclasses.asdict(buildrequest)
    build['buildset'] = buildset
    build['builderid'] = buildrequest.builderid
    build['builder'] = builder
    build['url'] = getURLForBuildrequest(master, buildrequest.buildrequestid)
    build['results'] = None
    build['complete'] = False


def should_attach_log(logs_config, log):
    if isinstance(logs_config, bool):
        return logs_config

    if log['name'] in logs_config:
        return True

    long_name = f"{log['stepname']}.{log['name']}"
    if long_name in logs_config:
        return True

    return False


@defer.inlineCallbacks
def getDetailsForBuilds(
    master,
    buildset,
    builds,
    want_properties=False,
    want_steps=False,
    want_previous_build=False,
    want_logs=False,
    add_logs=None,
    want_logs_content=False,
):
    builderids = {build['builderid'] for build in builds}

    builders = yield defer.gatherResults([master.data.get(("builders", _id)) for _id in builderids])

    buildersbyid = {builder['builderid']: builder for builder in builders}

    if want_properties:
        buildproperties = yield defer.gatherResults([
            master.data.get(("builds", build['buildid'], 'properties')) for build in builds
        ])
    else:  # we still need a list for the big zip
        buildproperties = list(range(len(builds)))

    if want_previous_build:
        prev_builds = yield defer.gatherResults([
            getPreviousBuild(master, build) for build in builds
        ])
    else:  # we still need a list for the big zip
        prev_builds = list(range(len(builds)))

    if add_logs is not None:
        logs_config = add_logs
    elif want_logs_content is not None:
        logs_config = want_logs_content
    else:
        logs_config = False

    if logs_config is not False:
        want_logs = True
    if want_logs:
        want_steps = True

    if want_steps:  # pylint: disable=too-many-nested-blocks
        buildsteps = yield defer.gatherResults([
            master.data.get(("builds", build['buildid'], 'steps')) for build in builds
        ])
        if want_logs:
            for build, build_steps in zip(builds, buildsteps):
                for s in build_steps:
                    logs = yield master.data.get(("steps", s['stepid'], 'logs'))
                    s['logs'] = list(logs)
                    for l in s['logs']:
                        l['stepname'] = s['name']
                        l['url'] = get_url_for_log(
                            master, build['builderid'], build['number'], s['number'], l['slug']
                        )
                        l['url_raw'] = get_url_for_log_raw(master, l['logid'], 'raw')
                        l['url_raw_inline'] = get_url_for_log_raw(master, l['logid'], 'raw_inline')
                        if should_attach_log(logs_config, l):
                            l['content'] = yield master.data.get(("logs", l['logid'], 'contents'))

    else:  # we still need a list for the big zip
        buildsteps = list(range(len(builds)))

    # a big zip to connect everything together
    for build, properties, steps, prev in zip(builds, buildproperties, buildsteps, prev_builds):
        build['builder'] = buildersbyid[build['builderid']]
        build['buildset'] = buildset
        build['url'] = getURLForBuild(master, build['builderid'], build['number'])

        if want_properties:
            build['properties'] = properties

        if want_steps:
            build['steps'] = list(steps)

        if want_previous_build:
            build['prev_build'] = prev


# perhaps we need data api for users with sourcestamps/:id/users
@defer.inlineCallbacks
def getResponsibleUsersForSourceStamp(master, sourcestampid):
    changesd = master.data.get(("sourcestamps", sourcestampid, "changes"))
    sourcestampd = master.data.get(("sourcestamps", sourcestampid))
    changes, sourcestamp = yield defer.gatherResults([changesd, sourcestampd])
    blamelist = set()
    # normally, we get only one, but just assume there might be several
    for c in changes:
        blamelist.add(c['author'])
    # Add patch author to blamelist
    if 'patch' in sourcestamp and sourcestamp['patch'] is not None:
        blamelist.add(sourcestamp['patch']['author'])
    blamelist = list(blamelist)
    blamelist.sort()
    return blamelist


# perhaps we need data api for users with builds/:id/users
@defer.inlineCallbacks
def getResponsibleUsersForBuild(master, buildid):
    dl = [
        master.data.get(("builds", buildid, "changes")),
        master.data.get(("builds", buildid, 'properties')),
    ]
    changes, properties = yield defer.gatherResults(dl)
    blamelist = set()

    # add users from changes
    for c in changes:
        blamelist.add(c['author'])

    # add owner from properties
    if 'owner' in properties:
        owner = properties['owner'][0]
        if isinstance(owner, str):
            blamelist.add(owner)
        else:
            blamelist.update(owner)
            log.msg(f"Warning: owner property is a list for buildid {buildid}. ")
            log.msg(f"Please report a bug: changes: {changes}. properties: {properties}")

    # add owner from properties
    if 'owners' in properties:
        blamelist.update(properties['owners'][0])

    blamelist = list(blamelist)
    blamelist.sort()
    return blamelist


# perhaps we need data api for users with buildsets/:id/users
@defer.inlineCallbacks
def get_responsible_users_for_buildset(master, buildsetid):
    props = yield master.data.get(("buildsets", buildsetid, "properties"))

    # TODO: This currently does not track what changes were in the buildset. getChangesForBuild()
    # would walk the change graph until it finds last successful build and uses the authors of
    # the changes as blame list. Probably this needs to be done here too
    owner = props.get("owner", None)
    if owner:
        return [owner[0]]
    return []


def getURLForBuild(master, builderid, build_number):
    prefix = master.config.buildbotURL
    return prefix + f"#/builders/{builderid}/builds/{build_number}"


def getURLForBuildrequest(master, buildrequestid):
    prefix = master.config.buildbotURL
    return f"{prefix}#/buildrequests/{buildrequestid}"


def get_url_for_log(master, builderid, build_number, step_number, log_slug):
    prefix = master.config.buildbotURL
    return (
        f"{prefix}#/builders/{builderid}/builds/{build_number}/"
        + f"steps/{step_number}/logs/{log_slug}"
    )


def get_url_for_log_raw(master, logid, suffix):
    prefix = master.config.buildbotURL
    return f"{prefix}api/v2/logs/{logid}/{suffix}"


@renderer
def URLForBuild(props):
    build = props.getBuild()
    return build.getUrl()


def merge_reports_prop(reports, prop):
    result = None
    for report in reports:
        if prop in report and report[prop] is not None:
            if result is None:
                result = report[prop]
            else:
                result += report[prop]

    return result


def merge_reports_prop_take_first(reports, prop):
    for report in reports:
        if prop in report and report[prop] is not None:
            return report[prop]

    return None
