#!/usr/bin/python3

# Copyright 2019 Ilya Shipitsin <chipitsine@gmail.com>
# Copyright 2020 Tim Duesterhus <tim@bastelstu.be>
#
# This program 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; either version
# 2 of the License, or (at your option) any later version.

import functools
import json
import re
import sys
import urllib.request
from os import environ

if len(sys.argv) == 2:
    ref_name = sys.argv[1]
else:
    print("Usage: {} <ref_name>".format(sys.argv[0]), file=sys.stderr)
    sys.exit(1)

#
# this CI is used for both development and stable branches of HAProxy
#
# naming convention used, if branch name matches:
#
#   "haproxy-" - stable branches
#   otherwise  - development branch (i.e. "latest" ssl variants, "latest" github images)
#
print("Generating matrix for branch '{}'.".format(ref_name))


def clean_ssl(ssl):
    return ssl.replace("_VERSION", "").lower()


@functools.lru_cache(5)
def determine_latest_openssl(ssl):
    headers = {}
    if environ.get("GITHUB_TOKEN") is not None:
        headers["Authorization"] = "token {}".format(environ.get("GITHUB_TOKEN"))
    request = urllib.request.Request(
        "https://api.github.com/repos/openssl/openssl/tags", headers=headers
    )
    try:
      openssl_tags = urllib.request.urlopen(request)
    except:
      return "OPENSSL_VERSION=failed_to_detect"
    tags = json.loads(openssl_tags.read().decode("utf-8"))
    latest_tag = ""
    for tag in tags:
        name = tag["name"]
        if "openssl-" in name:
            if name > latest_tag:
                latest_tag = name
    return "OPENSSL_VERSION={}".format(latest_tag[8:])


@functools.lru_cache(5)
def determine_latest_libressl(ssl):
    try:
      libressl_download_list = urllib.request.urlopen(
          "https://cdn.openbsd.org/pub/OpenBSD/LibreSSL/"
      )
    except:
      return "LIBRESSL_VERSION=failed_to_detect"
    for line in libressl_download_list.readlines():
        decoded_line = line.decode("utf-8")
        if "libressl-" in decoded_line and ".tar.gz.asc" in decoded_line:
            l = re.split("libressl-|.tar.gz.asc", decoded_line)[1]
    return "LIBRESSL_VERSION={}".format(l)


def clean_compression(compression):
    return compression.replace("USE_", "").lower()


def get_asan_flags(cc):
    return [
        "USE_OBSOLETE_LINKER=1",
        'DEBUG_CFLAGS="-g -fsanitize=address"',
        'LDFLAGS="-fsanitize=address"',
        'CPU_CFLAGS.generic="-O1"',
    ]


matrix = []

# Ubuntu

if "haproxy-" in ref_name:
    os = "ubuntu-22.04" # stable branch
else:
    os = "ubuntu-latest" # development branch

TARGET = "linux-glibc"
for CC in ["gcc", "clang"]:
    matrix.append(
        {
            "name": "{}, {}, no features".format(os, CC),
            "os": os,
            "TARGET": TARGET,
            "CC": CC,
            "FLAGS": [],
        }
    )

    matrix.append(
        {
            "name": "{}, {}, all features".format(os, CC),
            "os": os,
            "TARGET": TARGET,
            "CC": CC,
            "FLAGS": [
                "USE_ZLIB=1",
                "USE_OT=1",
                "OT_INC=${HOME}/opt-ot/include",
                "OT_LIB=${HOME}/opt-ot/lib",
                "OT_RUNPATH=1",
                "USE_PCRE=1",
                "USE_PCRE_JIT=1",
                "USE_LUA=1",
                "USE_OPENSSL=1",
                "USE_SYSTEMD=1",
                "USE_WURFL=1",
                "WURFL_INC=addons/wurfl/dummy",
                "WURFL_LIB=addons/wurfl/dummy",
                "USE_DEVICEATLAS=1",
                "DEVICEATLAS_SRC=addons/deviceatlas/dummy",
                "USE_PROMEX=1",
                "USE_51DEGREES=1",
                "51DEGREES_SRC=addons/51degrees/dummy/pattern",
            ],
        }
    )

    # ASAN

    matrix.append(
        {
            "name": "{}, {}, ASAN, all features".format(os, CC),
            "os": os,
            "TARGET": TARGET,
            "CC": CC,
            "FLAGS": get_asan_flags(CC)
            + [
                "USE_ZLIB=1",
                "USE_OT=1",
                "OT_INC=${HOME}/opt-ot/include",
                "OT_LIB=${HOME}/opt-ot/lib",
                "OT_RUNPATH=1",
                "USE_PCRE=1",
                "USE_PCRE_JIT=1",
                "USE_LUA=1",
                "USE_OPENSSL=1",
                "USE_SYSTEMD=1",
                "USE_WURFL=1",
                "WURFL_INC=addons/wurfl/dummy",
                "WURFL_LIB=addons/wurfl/dummy",
                "USE_DEVICEATLAS=1",
                "DEVICEATLAS_SRC=addons/deviceatlas/dummy",
                "USE_PROMEX=1",
                "USE_51DEGREES=1",
                "51DEGREES_SRC=addons/51degrees/dummy/pattern",
            ],
        }
    )

    for compression in ["USE_ZLIB=1"]:
        matrix.append(
            {
                "name": "{}, {}, gz={}".format(os, CC, clean_compression(compression)),
                "os": os,
                "TARGET": TARGET,
                "CC": CC,
                "FLAGS": [compression],
            }
        )

    ssl_versions = [
        "stock",
        "OPENSSL_VERSION=1.0.2u",
        "OPENSSL_VERSION=1.1.1s",
        "QUICTLS=yes",
        # "BORINGSSL=yes",
    ]

    if "haproxy-" not in ref_name: # development branch
        ssl_versions = ssl_versions + [
            "OPENSSL_VERSION=latest",
            "LIBRESSL_VERSION=latest",
        ]

    for ssl in ssl_versions:
        flags = ["USE_OPENSSL=1"]
        if ssl == "BORINGSSL=yes" or ssl == "QUICTLS=yes" or "LIBRESSL" in ssl:
            flags.append("USE_QUIC=1")
        if ssl != "stock":
            flags.append("SSL_LIB=${HOME}/opt/lib")
            flags.append("SSL_INC=${HOME}/opt/include")
        if "LIBRESSL" in ssl and "latest" in ssl:
            ssl = determine_latest_libressl(ssl)
        if "OPENSSL" in ssl and "latest" in ssl:
            ssl = determine_latest_openssl(ssl)

        matrix.append(
            {
                "name": "{}, {}, ssl={}".format(os, CC, clean_ssl(ssl)),
                "os": os,
                "TARGET": TARGET,
                "CC": CC,
                "ssl": ssl,
                "FLAGS": flags,
            }
        )

# macOS

if "haproxy-" in ref_name:
    os = "macos-12"     # stable branch
else:
    os = "macos-latest" # development branch

TARGET = "osx"
for CC in ["clang"]:
    matrix.append(
        {
            "name": "{}, {}, no features".format(os, CC),
            "os": os,
            "TARGET": TARGET,
            "CC": CC,
            "FLAGS": [],
        }
    )

# Print matrix

print(json.dumps(matrix, indent=4, sort_keys=True))

if environ.get("GITHUB_OUTPUT") is not None:
    with open(environ.get("GITHUB_OUTPUT"), "a") as f:
        print("matrix={}".format(json.dumps({"include": matrix})), file=f)