import sys
from os.path import join, abspath, dirname, exists
ROOT = abspath(join(dirname(__file__), ".."))
sys.path.insert(0, ROOT)

from shutil import move, rmtree
from optparse import OptionParser

from tools.paths import EXPORT_DIR, EXPORT_WORKSPACE, EXPORT_TMP
from tools.paths import MBED_BASE, MBED_LIBRARIES
from tools.export import export, setup_user_prj, EXPORTERS, mcu_ide_matrix
from tools.utils import args_error
from tools.tests import TESTS, Test, TEST_MAP
from tools.targets import TARGET_NAMES
from tools.libraries import LIBRARIES

try:
    import tools.private_settings as ps
except:
    ps = object()


if __name__ == '__main__':
    # Parse Options
    parser = OptionParser()

    targetnames = TARGET_NAMES
    targetnames.sort()
    toolchainlist = EXPORTERS.keys()
    toolchainlist.sort()

    parser.add_option("-m", "--mcu",
                      metavar="MCU",
                      default='LPC1768',
                      help="generate project for the given MCU (%s)"% ', '.join(targetnames))

    parser.add_option("-i",
                      dest="ide",
                      default='uvision',
                      help="The target IDE: %s"% str(toolchainlist))

    parser.add_option("-c", "--clean",
                      action="store_true",
                      default=False,
                      help="clean the export directory")

    parser.add_option("-p",
                      type="int",
                      dest="program",
                      help="The index of the desired test program: [0-%d]"% (len(TESTS)-1))

    parser.add_option("-n",
                      dest="program_name",
                      help="The name of the desired test program")

    parser.add_option("-b",
                      dest="build",
                      action="store_true",
                      default=False,
                      help="use the mbed library build, instead of the sources")

    parser.add_option("-L", "--list-tests",
                      action="store_true",
                      dest="list_tests",
                      default=False,
                      help="list available programs in order and exit")

    parser.add_option("-S", "--list-matrix",
                      action="store_true",
                      dest="supported_ides",
                      default=False,
                      help="displays supported matrix of MCUs and IDEs")

    parser.add_option("-E",
                      action="store_true",
                      dest="supported_ides_html",
                      default=False,
                      help="writes workspace_tools/export/README.md")

    (options, args) = parser.parse_args()

    # Print available tests in order and exit
    if options.list_tests is True:
        print '\n'.join(map(str, sorted(TEST_MAP.values())))
        sys.exit()

    # Only prints matrix of supported IDEs
    if options.supported_ides:
        print mcu_ide_matrix()
        exit(0)

    # Only prints matrix of supported IDEs
    if options.supported_ides_html:
        html = mcu_ide_matrix(verbose_html=True)
        try:
            with open("./export/README.md","w") as f:
                f.write("Exporter IDE/Platform Support\n")
                f.write("-----------------------------------\n")
                f.write("\n")
                f.write(html)
        except IOError as e:
            print "I/O error({0}): {1}".format(e.errno, e.strerror)
        except:
            print "Unexpected error:", sys.exc_info()[0]
            raise
        exit(0)

    # Clean Export Directory
    if options.clean:
        if exists(EXPORT_DIR):
            rmtree(EXPORT_DIR)

    # Target
    if options.mcu is None :
        args_error(parser, "[ERROR] You should specify an MCU")
    mcus = options.mcu

    # IDE
    if options.ide is None:
        args_error(parser, "[ERROR] You should specify an IDE")
    ide = options.ide

    # Export results
    successes = []
    failures = []

    for mcu in mcus.split(','):
        # Program Number or name
        p, n = options.program, options.program_name

        if n is not None and p is not None:
            args_error(parser, "[ERROR] specify either '-n' or '-p', not both")
        if n:
            if not n in TEST_MAP.keys():
                # Check if there is an alias for this in private_settings.py
                if getattr(ps, "test_alias", None) is not None:
                    alias = ps.test_alias.get(n, "")
                    if not alias in TEST_MAP.keys():
                        args_error(parser, "[ERROR] Program with name '%s' not found" % n)
                    else:
                        n = alias
                else:
                    args_error(parser, "[ERROR] Program with name '%s' not found" % n)
            p = TEST_MAP[n].n
        if p is None or (p < 0) or (p > (len(TESTS)-1)):
            message = "[ERROR] You have to specify one of the following tests:\n"
            message += '\n'.join(map(str, sorted(TEST_MAP.values())))
            args_error(parser, message)

        # Project
        if p is None or (p < 0) or (p > (len(TESTS)-1)):
            message = "[ERROR] You have to specify one of the following tests:\n"
            message += '\n'.join(map(str, sorted(TEST_MAP.values())))
            args_error(parser, message)
        test = Test(p)

        # Some libraries have extra macros (called by exporter symbols) to we need to pass
        # them to maintain compilation macros integrity between compiled library and
        # header files we might use with it
        lib_symbols = []
        for lib in LIBRARIES:
            if lib['build_dir'] in test.dependencies:
                lib_macros = lib.get('macros', None)
                if lib_macros is not None:
                    lib_symbols.extend(lib_macros)

        if not options.build:
            # Substitute the library builds with the sources
            # TODO: Substitute also the other library build paths
            if MBED_LIBRARIES in test.dependencies:
                test.dependencies.remove(MBED_LIBRARIES)
                test.dependencies.append(MBED_BASE)

        # Build the project with the same directory structure of the mbed online IDE
        project_dir = join(EXPORT_WORKSPACE, test.id)
        setup_user_prj(project_dir, test.source_dir, test.dependencies)

        # Export to selected toolchain
        tmp_path, report = export(project_dir, test.id, ide, mcu, EXPORT_WORKSPACE, EXPORT_TMP, extra_symbols=lib_symbols)
        if report['success']:
            zip_path = join(EXPORT_DIR, "%s_%s_%s.zip" % (test.id, ide, mcu))
            move(tmp_path, zip_path)
            successes.append("%s::%s\t%s"% (mcu, ide, zip_path))
        else:
            failures.append("%s::%s\t%s"% (mcu, ide, report['errormsg']))

    # Prints export results
    print
    if len(successes) > 0:
        print "Successful exports:"
        for success in successes:
            print "  * %s"% success
    if len(failures) > 0:
        print "Failed exports:"
        for failure in failures:
            print "  * %s"% failure