# Copyright (c) 2014-present PlatformIO <contact@platformio.org>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import base64
import json
import sys
from os import environ
from os.path import expanduser, join
from time import time

from SCons.Script import (ARGUMENTS, COMMAND_LINE_TARGETS, DEFAULT_TARGETS,
                          Action, AllowSubstExceptions, AlwaysBuild,
                          DefaultEnvironment, Variables)

from platformio import util

AllowSubstExceptions(NameError)

# allow common variables from INI file
commonvars = Variables(None)
commonvars.AddVariables(
    ("PLATFORM_MANIFEST",),
    ("BUILD_SCRIPT",),
    ("EXTRA_SCRIPTS",),
    ("PIOENV",),
    ("PIOTEST",),
    ("PIOPLATFORM",),
    ("PIOFRAMEWORK",),

    # build options
    ("BUILD_FLAGS",),
    ("SRC_BUILD_FLAGS",),
    ("BUILD_UNFLAGS",),
    ("SRC_FILTER",),

    # library options
    ("LIB_LDF_MODE",),
    ("LIB_COMPAT_MODE",),
    ("LIB_DEPS",),
    ("LIB_IGNORE",),
    ("LIB_EXTRA_DIRS",),
    ("LIB_ARCHIVE",),

    # board options
    ("BOARD",),
    ("BOARD_MCU",),
    ("BOARD_F_CPU",),
    ("BOARD_F_FLASH",),
    ("BOARD_FLASH_MODE",),

    # upload options
    ("UPLOAD_PORT",),
    ("UPLOAD_PROTOCOL",),
    ("UPLOAD_SPEED",),
    ("UPLOAD_FLAGS",),
    ("UPLOAD_RESETMETHOD",)

)  # yapf: disable

MULTILINE_VARS = [
    "EXTRA_SCRIPTS", "PIOFRAMEWORK", "BUILD_FLAGS", "SRC_BUILD_FLAGS",
    "BUILD_UNFLAGS", "SRC_FILTER", "LIB_DEPS", "LIB_IGNORE", "LIB_EXTRA_DIRS"
]

DEFAULT_ENV_OPTIONS = dict(
    tools=[
        "ar", "as", "gcc", "g++", "gnulink", "platformio", "pioplatform",
        "piowinhooks", "piolib", "pioupload", "piomisc", "pioide"
    ],  # yapf: disable
    toolpath=[join(util.get_source_dir(), "builder", "tools")],
    variables=commonvars,

    # Propagating External Environment
    PIOVARIABLES=commonvars.keys(),
    ENV=environ,
    UNIX_TIME=int(time()),
    PIOHOME_DIR=util.get_home_dir(),
    PROJECT_DIR=util.get_project_dir(),
    PROJECTINCLUDE_DIR=util.get_projectinclude_dir(),
    PROJECTSRC_DIR=util.get_projectsrc_dir(),
    PROJECTTEST_DIR=util.get_projecttest_dir(),
    PROJECTDATA_DIR=util.get_projectdata_dir(),
    PROJECTBUILD_DIR=util.get_projectbuild_dir(),
    BUILD_DIR=join("$PROJECTBUILD_DIR", "$PIOENV"),
    BUILDSRC_DIR=join("$BUILD_DIR", "src"),
    BUILDTEST_DIR=join("$BUILD_DIR", "test"),
    LIBSOURCE_DIRS=[
        util.get_projectlib_dir(),
        util.get_projectlibdeps_dir(),
        join("$PIOHOME_DIR", "lib")
    ],
    PROGNAME="program",
    PROG_PATH=join("$BUILD_DIR", "$PROGNAME$PROGSUFFIX"),
    PYTHONEXE=util.get_pythonexe_path())

if not int(ARGUMENTS.get("PIOVERBOSE", 0)):
    DEFAULT_ENV_OPTIONS['ARCOMSTR'] = "Archiving $TARGET"
    DEFAULT_ENV_OPTIONS['LINKCOMSTR'] = "Linking $TARGET"
    DEFAULT_ENV_OPTIONS['RANLIBCOMSTR'] = "Indexing $TARGET"
    for k in ("ASCOMSTR", "ASPPCOMSTR", "CCCOMSTR", "CXXCOMSTR"):
        DEFAULT_ENV_OPTIONS[k] = "Compiling $TARGET"

env = DefaultEnvironment(**DEFAULT_ENV_OPTIONS)

# decode common variables
for k in commonvars.keys():
    if k in env:
        env[k] = base64.b64decode(env[k])
        if k in MULTILINE_VARS:
            env[k] = util.parse_conf_multi_values(env[k])

if env.GetOption('clean'):
    env.PioClean(env.subst("$BUILD_DIR"))
    env.Exit(0)
elif not int(ARGUMENTS.get("PIOVERBOSE", 0)):
    print "Verbose mode can be enabled via `-v, --verbose` option"

# Handle custom variables from system environment
for var in ("BUILD_FLAGS", "SRC_BUILD_FLAGS", "SRC_FILTER", "EXTRA_SCRIPTS",
            "UPLOAD_PORT", "UPLOAD_FLAGS", "LIB_EXTRA_DIRS"):
    k = "PLATFORMIO_%s" % var
    if k not in environ:
        continue
    if var in ("UPLOAD_PORT", ):
        env[var] = environ.get(k)
        continue
    env.Append(**{var: util.parse_conf_multi_values(environ.get(k))})

# Configure extra library source directories for LDF
if util.get_project_optional_dir("lib_extra_dirs"):
    env.Prepend(
        LIBSOURCE_DIRS=util.parse_conf_multi_values(
            util.get_project_optional_dir("lib_extra_dirs")))
env.Prepend(LIBSOURCE_DIRS=env.get("LIB_EXTRA_DIRS", []))
env['LIBSOURCE_DIRS'] = [
    expanduser(d) if d.startswith("~") else d for d in env['LIBSOURCE_DIRS']
]

env.LoadPioPlatform(commonvars)

env.SConscriptChdir(0)
env.SConsignFile(join("$PROJECTBUILD_DIR", ".sconsign.dblite"))

for item in env.GetPreExtraScripts():
    env.SConscript(item, exports="env")

env.SConscript("$BUILD_SCRIPT")

AlwaysBuild(env.Alias("__debug", DEFAULT_TARGETS + ["size"]))
AlwaysBuild(env.Alias("__test", DEFAULT_TARGETS + ["size"]))

if "UPLOAD_FLAGS" in env:
    env.Append(UPLOADERFLAGS=["$UPLOAD_FLAGS"])

for item in env.GetPostExtraScripts():
    env.SConscript(item, exports="env")

if "envdump" in COMMAND_LINE_TARGETS:
    print env.Dump()
    env.Exit(0)

if "idedata" in COMMAND_LINE_TARGETS:
    try:
        print "\n%s\n" % util.path_to_unicode(
            json.dumps(env.DumpIDEData(), ensure_ascii=False))
        env.Exit(0)
    except UnicodeDecodeError:
        sys.stderr.write(
            "\nUnicodeDecodeError: Non-ASCII characters found in build "
            "environment\n"
            "See explanation in FAQ > Troubleshooting > Building\n"
            "http://docs.platformio.org/page/faq.html\n\n")
        env.Exit(1)


def print_upload_protocols_info(  # pylint: disable=unused-argument
        source, target, _):
    selected = env.subst("$UPLOAD_PROTOCOL")
    available = env.BoardConfig().get("upload", {}).get(
        "protocols", [selected])
    print "Available: %s" % ", ".join(available)
    print "Selected: %s" % selected


env.AddPreAction(["upload", "program"],
                 Action(print_upload_protocols_info,
                        "Configuring upload protocol..."))