# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.


import logging

import redo
import requests

from gecko_taskgraph.util.scriptworker import (
    BALROG_SCOPE_ALIAS_TO_PROJECT,
    BALROG_SERVER_SCOPES,
)

logger = logging.getLogger(__name__)

PLATFORM_RENAMES = {
    "windows2012-32": "win32",
    "windows2012-64": "win64",
    "windows2012-aarch64": "win64-aarch64",
    "osx-cross": "macosx64",
    "osx": "macosx64",
}

BALROG_PLATFORM_MAP = {
    "linux64": ["Linux_x86_64-gcc3"],
    "linux64-aarch64": ["Linux_aarch64-gcc3"],
    "linux64-asan-reporter": ["Linux_x86_64-gcc3-asan"],
    "macosx64": [
        "Darwin_x86_64-gcc3-u-i386-x86_64",
        "Darwin_x86-gcc3-u-i386-x86_64",
        "Darwin_aarch64-gcc3",
        "Darwin_x86-gcc3",
        "Darwin_x86_64-gcc3",
    ],
    "win32": ["WINNT_x86-msvc", "WINNT_x86-msvc-x86", "WINNT_x86-msvc-x64"],
    "win64": ["WINNT_x86_64-msvc", "WINNT_x86_64-msvc-x64"],
    "win64-asan-reporter": ["WINNT_x86_64-msvc-x64-asan"],
    "win64-aarch64": [
        "WINNT_aarch64-msvc-aarch64",
    ],
}

FTP_PLATFORM_MAP = {
    "Darwin_x86-gcc3": "mac",
    "Darwin_x86-gcc3-u-i386-x86_64": "mac",
    "Darwin_x86_64-gcc3": "mac",
    "Darwin_x86_64-gcc3-u-i386-x86_64": "mac",
    "Darwin_aarch64-gcc3": "mac",
    "Linux_x86_64-gcc3": "linux-x86_64",
    "Linux_aarch64-gcc3": "linux-aarch64",
    "Linux_x86_64-gcc3-asan": "linux-x86_64-asan-reporter",
    "WINNT_x86_64-msvc-x64-asan": "win64-asan-reporter",
    "WINNT_x86-msvc": "win32",
    "WINNT_x86-msvc-x64": "win32",
    "WINNT_x86-msvc-x86": "win32",
    "WINNT_x86_64-msvc": "win64",
    "WINNT_x86_64-msvc-x64": "win64",
    "WINNT_aarch64-msvc-aarch64": "win64-aarch64",
}


def get_balrog_platform_name(platform):
    """Convert build platform names into balrog platform names.

    Remove known values instead to catch aarch64 and other platforms
    that may be added.
    """
    removals = ["-devedition", "-shippable"]
    for remove in removals:
        platform = platform.replace(remove, "")
    return PLATFORM_RENAMES.get(platform, platform)


def _sanitize_platform(platform):
    platform = get_balrog_platform_name(platform)
    return BALROG_PLATFORM_MAP[platform][0]


def get_builds(release_history, platform, locale):
    """Examine cached balrog release history and return the list of
    builds we need to generate diffs from"""
    platform = _sanitize_platform(platform)
    return release_history.get(platform, {}).get(locale, {})


def get_partials_artifacts_from_params(release_history, platform, locale):
    platform = _sanitize_platform(platform)
    return [
        (artifact, details.get("previousVersion", None))
        for artifact, details in release_history.get(platform, {})
        .get(locale, {})
        .items()
    ]


def get_partials_info_from_params(release_history, platform, locale):
    platform = _sanitize_platform(platform)

    artifact_map = {}
    for k in release_history.get(platform, {}).get(locale, {}):
        details = release_history[platform][locale][k]
        attributes = ("buildid", "previousBuildNumber", "previousVersion")
        artifact_map[k] = {
            attr: details[attr] for attr in attributes if attr in details
        }
    return artifact_map


def _retry_on_http_errors(url, verify, params, errors):
    if params:
        params_str = "&".join("=".join([k, str(v)]) for k, v in params.items())
    else:
        params_str = ""
    logger.info("Connecting to %s?%s", url, params_str)
    for _ in redo.retrier(sleeptime=5, max_sleeptime=30, attempts=10):
        try:
            req = requests.get(url, verify=verify, params=params, timeout=10)
            req.raise_for_status()
            return req
        except requests.HTTPError as e:
            if e.response.status_code in errors:
                logger.exception(
                    "Got HTTP %s trying to reach %s", e.response.status_code, url
                )
            else:
                raise
    else:
        raise Exception(f"Cannot connect to {url}!")


def get_sorted_releases(product, branch):
    """Returns a list of release names from Balrog.
    :param product: product name, AKA appName
    :param branch: branch name, e.g. mozilla-central
    :return: a sorted list of release names, most recent first.
    """
    url = f"{_get_balrog_api_root(branch)}/releases"
    params = {
        "product": product,
        # Adding -nightly-2 (2 stands for the beginning of build ID
        # based on date) should filter out release and latest blobs.
        # This should be changed to -nightly-3 in 3000 ;)
        "name_prefix": f"{product}-{branch}-nightly-2",
        "names_only": True,
    }
    req = _retry_on_http_errors(url=url, verify=True, params=params, errors=[500, 502])
    releases = req.json()["names"]
    releases = sorted(releases, reverse=True)
    return releases


def get_release_builds(release, branch):
    url = f"{_get_balrog_api_root(branch)}/releases/{release}"
    req = _retry_on_http_errors(url=url, verify=True, params=None, errors=[500, 502])
    return req.json()


def _get_balrog_api_root(branch):
    # Query into the scopes scriptworker uses to make sure we check against the same balrog server
    # That our jobs would use.
    scope = None
    for alias, projects in BALROG_SCOPE_ALIAS_TO_PROJECT:
        if branch in projects and alias in BALROG_SERVER_SCOPES:
            scope = BALROG_SERVER_SCOPES[alias]
            break
    else:
        scope = BALROG_SERVER_SCOPES["default"]

    if scope == "balrog:server:dep":
        return "https://stage.balrog.nonprod.cloudops.mozgcp.net/api/v1"
    return "https://aus5.mozilla.org/api/v1"


def find_localtest(fileUrls):
    for channel in fileUrls:
        if "-localtest" in channel:
            return channel


def populate_release_history(
    product, branch, maxbuilds=4, maxsearch=10, partial_updates=None
):
    # Assuming we are using release branches when we know the list of previous
    # releases in advance
    if partial_updates is not None:
        return _populate_release_history(
            product, branch, partial_updates=partial_updates
        )
    return _populate_nightly_history(
        product, branch, maxbuilds=maxbuilds, maxsearch=maxsearch
    )


def _populate_nightly_history(product, branch, maxbuilds=4, maxsearch=10):
    """Find relevant releases in Balrog
    Not all releases have all platforms and locales, due
    to Taskcluster migration.

        Args:
            product (str): capitalized product name, AKA appName, e.g. Firefox
            branch (str): branch name (mozilla-central)
            maxbuilds (int): Maximum number of historical releases to populate
            maxsearch(int): Traverse at most this many releases, to avoid
                working through the entire history.
        Returns:
            json object based on data from balrog api

            results = {
                'platform1': {
                    'locale1': {
                        'buildid1': mar_url,
                        'buildid2': mar_url,
                        'buildid3': mar_url,
                    },
                    'locale2': {
                        'target.partial-1.mar': {'buildid1': 'mar_url'},
                    }
                },
                'platform2': {
                }
            }
    """
    last_releases = get_sorted_releases(product, branch)

    partial_mar_tmpl = "target.partial-{}.mar"

    builds = dict()
    for release in last_releases[:maxsearch]:
        # maxbuilds in all categories, don't make any more queries
        full = len(builds) > 0 and all(
            len(builds[platform][locale]) >= maxbuilds
            for platform in builds
            for locale in builds[platform]
        )
        if full:
            break
        history = get_release_builds(release, branch)

        for platform in history["platforms"]:
            if "alias" in history["platforms"][platform]:
                continue
            if platform not in builds:
                builds[platform] = dict()
            for locale in history["platforms"][platform]["locales"]:
                if locale not in builds[platform]:
                    builds[platform][locale] = dict()
                if len(builds[platform][locale]) >= maxbuilds:
                    continue
                if "buildID" not in history["platforms"][platform]["locales"][locale]:
                    continue
                buildid = history["platforms"][platform]["locales"][locale]["buildID"]
                if (
                    "completes" not in history["platforms"][platform]["locales"][locale]
                    or len(
                        history["platforms"][platform]["locales"][locale]["completes"]
                    )
                    == 0
                ):
                    continue
                url = history["platforms"][platform]["locales"][locale]["completes"][0][
                    "fileUrl"
                ]
                nextkey = len(builds[platform][locale]) + 1
                builds[platform][locale][partial_mar_tmpl.format(nextkey)] = {
                    "buildid": buildid,
                    "mar_url": url,
                }
    return builds


def _populate_release_history(product, branch, partial_updates):
    builds = dict()
    for version, release in partial_updates.items():
        prev_release_blob = "{product}-{version}-build{build_number}".format(
            product=product, version=version, build_number=release["buildNumber"]
        )
        partial_mar_key = f"target-{version}.partial.mar"
        history = get_release_builds(prev_release_blob, branch)
        # use one of the localtest channels to avoid relying on bouncer
        localtest = find_localtest(history["fileUrls"])
        url_pattern = history["fileUrls"][localtest]["completes"]["*"]

        for platform in history["platforms"]:
            if platform not in FTP_PLATFORM_MAP:
                # skip EOL platforms
                continue
            if "alias" in history["platforms"][platform]:
                continue
            if platform not in builds:
                builds[platform] = dict()
            for locale in history["platforms"][platform]["locales"]:
                if locale not in builds[platform]:
                    builds[platform][locale] = dict()
                buildid = history["platforms"][platform]["locales"][locale]["buildID"]
                url = url_pattern.replace(
                    "%OS_FTP%", FTP_PLATFORM_MAP[platform]
                ).replace("%LOCALE%", locale)
                builds[platform][locale][partial_mar_key] = {
                    "buildid": buildid,
                    "mar_url": url,
                    "previousVersion": version,
                    "previousBuildNumber": release["buildNumber"],
                    "product": product,
                }
    return builds