# Copyright (C) Ivan Kravets <me@ikravets.com>
# See LICENSE for details.

import argparse
import zipfile
from os import getcwd, listdir, makedirs, mkdir, rename
from os.path import isdir, isfile, join
from shutil import move, rmtree
from sys import exit as sys_exit
from sys import path

path.append("..")

from platformio.util import exec_command, get_home_dir


def _unzip_generated_file(mbed_dir, output_dir, mcu):
    filename = join(
        mbed_dir, "build", "export", "MBED_A1_emblocks_%s.zip" % mcu)
    variant_dir = join(output_dir, "variant", mcu)
    if isfile(filename):
        with zipfile.ZipFile(filename) as zfile:
            mkdir(variant_dir)
            zfile.extractall(variant_dir)
            for f in listdir(join(variant_dir, "MBED_A1")):
                if not f.lower().startswith("mbed"):
                    continue
                move(join(variant_dir, "MBED_A1", f), variant_dir)
            rename(join(variant_dir, "MBED_A1.eix"),
                   join(variant_dir, "%s.eix" % mcu))
            rmtree(join(variant_dir, "MBED_A1"))
    else:
        print "Warning! Skipped board: %s" % mcu


def buildlib(mbed_dir, mcu, lib="mbed"):
    build_command = [
        "python",
        join(mbed_dir, "workspace_tools", "build.py"),
        "--mcu", mcu,
        "-t", "GCC_ARM"
    ]
    if lib is not "mbed":
        build_command.append(lib)
    build_result = exec_command(build_command, cwd=getcwd())
    if build_result['returncode'] != 0:
        print "*     %s doesn't support %s library!" % (mcu, lib)


def copylibs(mbed_dir, output_dir):
    libs = ["dsp", "fat", "net", "rtos", "usb", "usb_host"]
    libs_dir = join(output_dir, "libs")
    makedirs(libs_dir)

    print "Moving generated libraries to framework dir..."
    for lib in libs:
        if lib == "net":
            move(join(mbed_dir, "build", lib, "eth"), libs_dir)
            continue
        move(join(mbed_dir, "build", lib), libs_dir)


def main(mbed_dir, output_dir):
    print "Starting..."

    path.append(mbed_dir)
    from workspace_tools.export import gccarm

    if isdir(output_dir):
        print "Deleting previous framework dir..."
        rmtree(output_dir)

    settings_file = join(mbed_dir, "workspace_tools", "private_settings.py")
    if not isfile(settings_file):
        with open(settings_file, "w") as f:
            f.write("GCC_ARM_PATH = '%s'" %
                    join(get_home_dir(), "packages", "toolchain-gccarmnoneeabi",
                         "bin"))

    makedirs(join(output_dir, "variant"))
    mbed_libs = ["--rtos", "--dsp", "--fat", "--eth", "--usb", "--usb_host"]

    for mcu in set(gccarm.GccArm.TARGETS):
        print "Processing board: %s" % mcu
        buildlib(mbed_dir, mcu)
        for lib in mbed_libs:
            buildlib(mbed_dir, mcu, lib)
        result = exec_command(
            ["python", join(mbed_dir, "workspace_tools", "project.py"),
             "--mcu", mcu, "-i", "emblocks", "-p", "0", "-b"], cwd=getcwd()
        )
        if result['returncode'] != 0:
            print "Unable to build the project for %s" % mcu
            continue
        _unzip_generated_file(mbed_dir, output_dir, mcu)
    copylibs(mbed_dir, output_dir)

    with open(join(output_dir, "boards.txt"), "w") as fp:
        fp.write("\n".join(sorted(listdir(join(output_dir, "variant")))))

    print "Complete!"


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument('--mbed', help="The path to mbed framework")
    parser.add_argument('--output', help="The path to output directory")
    args = vars(parser.parse_args())
    sys_exit(main(args["mbed"], args["output"]))