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

from shutil import move, rmtree
from argparse import ArgumentParser
from os import path

from tools.paths import EXPORT_DIR
from tools.export import export, EXPORTERS, mcu_ide_matrix
from tools.tests import TESTS, TEST_MAP
from tools.tests import test_known, test_name_known
from tools.targets import TARGET_NAMES
from tools.libraries import LIBRARIES
from utils import argparse_filestring_type, argparse_many
from utils import argparse_force_lowercase_type, argparse_force_uppercase_type, argparse_dir_not_parent
from project_api import setup_project, perform_export, print_results, get_lib_symbols



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

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

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

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

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

    group = parser.add_mutually_exclusive_group(required=False)
    group.add_argument("-p",
                      type=test_known,
                      dest="program",
                      help="The index of the desired test program: [0-%d]"% (len(TESTS)-1))

    group.add_argument("-n",
                      type=test_name_known,
                      dest="program",
                      help="The name of the desired test program")

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

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

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

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

    parser.add_argument("--source",
                      action="append",
                      type=argparse_filestring_type,
                      dest="source_dir",
                      default=[],
                      help="The source (input) directory")

    parser.add_argument("-D",
                      action="append",
                      dest="macros",
                      help="Add a macro definition")

    options = 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)

    # Export results
    successes = []
    failures = []

    # source_dir = use relative paths, otherwise sources are copied
    sources_relative = True if options.source_dir else False

    for mcu in options.mcu:
        # Program Number or name
        p, src, ide = options.program, options.source_dir, options.ide
        try:
            project_dir, project_name, project_temp = setup_project(mcu, ide, p, src, options.build)
            zip = not bool(src) # create zip when no src_dir provided
            clean = not bool(src) # don't clean when source is provided, use acrual source tree for IDE files

            # Export to selected toolchain
            lib_symbols = get_lib_symbols(options.macros, src, p)
            tmp_path, report = export(project_dir, project_name, ide, mcu, project_dir[0], project_temp, clean=clean, make_zip=zip, extra_symbols=lib_symbols, sources_relative=sources_relative)
        except OSError as e:
            if e.errno == 2:
                report = dict(success=False, errormsg="Library path '%s' does not exist. Ensure that the library is built." % (e.filename))
            else:
                report = dict(success=False, errormsg="An OS error occured: errno #{}".format(e.errno))
        if report['success']:
            if not zip:
                zip_path = join(project_temp, project_name)
            else:
                zip_path = join(EXPORT_DIR, "%s_%s_%s.zip" % (project_name, 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_results(successes, failures)