#!/usr/bin/env python

# This script merges two Arduino Board Manager package json files.
# Usage:
#   python merge_packages.py package_esp8266com_index.json version/new/package_esp8266com_index.json
# Written by Ivan Grokhotkov, 2015
#

from __future__ import print_function

# from distutils.version import LooseVersion
from packaging.version import Version
import re
import json
import sys


def load_package(filename):
    pkg = json.load(open(filename))["packages"][0]
    print("Loaded package {0} from {1}".format(pkg["name"], filename), file=sys.stderr)
    print("{0} platform(s), {1} tools".format(len(pkg["platforms"]), len(pkg["tools"])), file=sys.stderr)
    return pkg


def merge_objects(versions, obj):
    for o in obj:
        name = o["name"].encode("ascii")
        ver = o["version"].encode("ascii")
        if name not in versions:
            print("found new object, {0}".format(name), file=sys.stderr)
            versions[name] = {}
        if ver not in versions[name]:
            print("found new version {0} for object {1}".format(ver, name), file=sys.stderr)
            versions[name][ver] = o
    return versions


# Normalize ESP release version string (x.x.x) by adding '-rc<MAXINT>' (x.x.x-rc9223372036854775807)
# to ensure having REL above any RC
# Dummy approach, functional anyway for current ESP package versioning
# (unlike NormalizedVersion/LooseVersion/StrictVersion & similar crap)
def pkgVersionNormalized(versionString):

    verStr = str(versionString)
    verParts = re.split(r"\.|-rc|-alpha", verStr, flags=re.IGNORECASE)

    if len(verParts) == 3:
        if sys.version_info > (3, 0):  # Python 3
            verStr = str(versionString) + "-rc" + str(sys.maxsize)
        else:  # Python 2
            verStr = str(versionString) + "-rc" + str(sys.maxint)

    elif len(verParts) != 4:
        print("pkgVersionNormalized WARNING: unexpected version format: {0})".format(verStr), file=sys.stderr)

    return verStr


def main(args):
    if len(args) < 3:
        print("Usage: {0} <package1> <package2>".format(args[0]), file=sys.stderr)
        return 1

    tools = {}
    platforms = {}
    pkg1 = load_package(args[1])
    tools = merge_objects(tools, pkg1["tools"])
    platforms = merge_objects(platforms, pkg1["platforms"])
    pkg2 = load_package(args[2])
    tools = merge_objects(tools, pkg2["tools"])
    platforms = merge_objects(platforms, pkg2["platforms"])

    pkg1["tools"] = []
    pkg1["platforms"] = []

    for name in tools:
        for version in tools[name]:
            print("Adding tool {0}-{1}".format(name, version), file=sys.stderr)
            pkg1["tools"].append(tools[name][version])

    for name in platforms:
        for version in platforms[name]:
            print("Adding platform {0}-{1}".format(name, version), file=sys.stderr)
            pkg1["platforms"].append(platforms[name][version])

    # pkg1["platforms"] = sorted(
    #     pkg1["platforms"], key=lambda k: LooseVersion(pkgVersionNormalized(k["version"])), reverse=True
    # )

    pkg1["platforms"] = sorted(
        pkg1["platforms"], key=lambda k: Version(pkgVersionNormalized(k["version"])), reverse=True
    )

    json.dump({"packages": [pkg1]}, sys.stdout, indent=2)


if __name__ == "__main__":
    sys.exit(main(sys.argv))