#!/usr/bin/env python

################################################################################
#
# Copyright 2017 Proyectos y Sistemas de Mantenimiento SL (eProsima).
#           2018 PX4 Pro Development Team. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its contributors
# may be used to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
################################################################################

# This script can generate the client and agent code based on a set of topics
# to sent and set to receive. It uses fastrtpsgen to generate the code from the
# IDL for the topic messages. The PX4 msg definitions are used to create the IDL
# used by fastrtpsgen using templates.

import sys
import os
import argparse
import shutil
import px_generate_uorb_topic_files
import px_generate_uorb_topic_helper
import subprocess
import glob
import errno
try:
    import yaml
except ImportError:
    raise ImportError(
        "Failed to import yaml. You may need to install it with 'sudo pip install pyyaml'")


def get_absolute_path(arg_parse_dir):
    root_path = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

    if isinstance(arg_parse_dir, list):
        dir = arg_parse_dir[0]
    else:
        dir = arg_parse_dir

    if dir[0] != '/':
        dir = root_path + "/" + dir

    return dir


def parse_yaml_msg_id_file(yaml_file):
    """
    Parses a yaml file into a dict
    """
    try:
        with open(yaml_file, 'r') as f:
            return yaml.load(f)
    except OSError as e:
        if e.errno == errno.ENOENT:
            raise IOError(errno.ENOENT, os.strerror(errno.ENOENT), yaml_file)
        else:
            raise


def get_used_rtps_ids(msg_id_map):
    msg_ids = {}
    for dict in msg_id_map['rtps']:
        msg_ids.update({dict['msg']: dict['id']})
    return msg_ids


def check_rtps_id_uniqueness(msg_id_map):
    """
    Checks if there are no ID's repeated on the map
    """
    msg_ids = get_used_rtps_ids(msg_id_map)

    used_ids = msg_ids.values()
    used_ids.sort()

    repeated_keys = dict()
    for key, value in msg_ids.items():
        if used_ids.count(value) > 1:
            repeated_keys.update({key: value})

    if not repeated_keys:
        print("All good. RTPS ID's are unique")
    else:
        raise AssertionError(", ".join('%s' % msgs for msgs in repeated_keys.keys()) +
                             " have their keys repeated. Please choose from the following pool:\n" +
                             ", ".join('%d' % id for id in px_generate_uorb_topic_helper.check_available_ids(used_ids)))


default_client_out = get_absolute_path(
    "src/modules/micrortps_bridge/micrortps_client")
default_agent_out = get_absolute_path(
    "src/modules/micrortps_bridge/micrortps_agent")
default_uorb_templates_dir = "templates/uorb_microcdr"
default_urtps_templates_dir = "templates/urtps"
default_rtps_id_file = "tools/uorb_rtps_message_ids.yaml"
default_package_name = px_generate_uorb_topic_files.PACKAGE

parser = argparse.ArgumentParser()

parser.add_argument("-s", "--send", dest='send', metavar='*.msg',
                    type=str, nargs='+', help="Topics to be sended")
parser.add_argument("-r", "--receive", dest='receive', metavar='*.msg',
                    type=str, nargs='+', help="Topics to be received")
parser.add_argument("-a", "--agent", dest='agent', action="store_true",
                    help="Flag for generate the agent, by default is true if -c is not specified")
parser.add_argument("-c", "--client", dest='client', action="store_true",
                    help="Flag for generate the client, by default is true if -a is not specified")
parser.add_argument("-i", "--generate-idl", dest='gen_idl',
                    action="store_true", help="Flag for generate idl files for each msg")
parser.add_argument("-j", "--idl-dir", dest='idl_dir',
                    type=str, help="IDL files dir", default='')
parser.add_argument("-m", "--mkdir-build", dest='mkdir_build',
                    action="store_true", help="Flag to create 'build' dir")
parser.add_argument("-l", "--generate-cmakelists", dest='cmakelists',
                    action="store_true", help="Flag to generate a CMakeLists.txt file for the micro-RTPS agent")
parser.add_argument("-t", "--topic-msg-dir", dest='msgdir', type=str,
                    help="Topics message dir, by default msg/", default="msg")
parser.add_argument("-b", "--uorb-templates-dir", dest='uorb_templates', type=str,
                    help="uORB templates dir, by default msg_dir/templates/uorb_microcdr", default=default_uorb_templates_dir)
parser.add_argument("-q", "--urtps-templates-dir", dest='urtps_templates', type=str,
                    help="uRTPS templates dir, by default msg_dir/templates/urtps", default=default_urtps_templates_dir)
parser.add_argument("-y", "--rtps-ids-file", dest='yaml_file', type=str,
                    help="RTPS msg IDs definition file, relative to the msg_dir, by default tools/uorb_rtps_message_ids.yaml", default=default_rtps_id_file)
parser.add_argument("-p", "--package", dest='package', type=str,
                    help="Msg package naming, by default px4", default=default_package_name)
parser.add_argument("-o", "--agent-outdir", dest='agentdir', type=str, nargs=1,
                    help="Agent output dir, by default src/modules/micrortps_bridge/micrortps_agent", default=default_agent_out)
parser.add_argument("-u", "--client-outdir", dest='clientdir', type=str, nargs=1,
                    help="Client output dir, by default src/modules/micrortps_bridge/micrortps_client", default=default_client_out)
parser.add_argument("-f", "--fastrtpsgen-dir", dest='fastrtpsgen', type=str, nargs='?',
                    help="fastrtpsgen installation dir, only needed if fastrtpsgen is not in PATH, by default empty", default="")
parser.add_argument("-g", "--fastrtpsgen-include", dest='fastrtpsgen_include', type=str, nargs='?',
                    help="directory(ies) to add to preprocessor include paths of fastrtpsgen, by default empty", default="")
parser.add_argument("--delete-tree", dest='del_tree',
                    action="store_true", help="Delete dir tree output dir(s)")


if len(sys.argv) <= 1:
    parser.print_usage()
    exit(-1)

# Parse arguments
args = parser.parse_args()
msg_folder = get_absolute_path(args.msgdir)
msg_files_send = []
msg_files_receive = []
if args.send:
    msg_files_send = [get_absolute_path(msg) for msg in args.send]
if args.receive:
    msg_files_receive = [get_absolute_path(msg) for msg in args.receive]
package = args.package
agent = args.agent
client = args.client
mkdir_build = args.mkdir_build
cmakelists = args.cmakelists
del_tree = args.del_tree
px_generate_uorb_topic_files.append_to_include_path(
    {msg_folder}, px_generate_uorb_topic_files.INCL_DEFAULT, package)
agent_out_dir = get_absolute_path(args.agentdir)
client_out_dir = get_absolute_path(args.clientdir)
gen_idl = args.gen_idl
idl_dir = args.idl_dir
if idl_dir != '':
    idl_dir = get_absolute_path(args.idl_dir)
else:
    idl_dir = os.path.join(agent_out_dir, "idl")

if args.fastrtpsgen is None or args.fastrtpsgen == "":
    # Assume fastrtpsgen is in PATH
    fastrtpsgen_path = "fastrtpsgen"
else:
    # Path to fastrtpsgen is explicitly specified
    fastrtpsgen_path = os.path.join(
        get_absolute_path(args.fastrtpsgen), "/fastrtpsgen")
fastrtpsgen_include = args.fastrtpsgen_include
if fastrtpsgen_include is not None and fastrtpsgen_include != '':
    fastrtpsgen_include = "-I " + \
        get_absolute_path(args.fastrtpsgen_include) + " "

# If nothing specified it's generated both
if agent == False and client == False:
    agent = True
    client = True

if del_tree:
    if agent:
        _continue = str(raw_input("\nFiles in " + agent_out_dir +
                                  " will be erased, continue?[Y/n]\n"))
        if _continue == "N" or _continue == "n":
            print("Aborting execution...")
            exit(-1)
        else:
            if agent and os.path.isdir(agent_out_dir):
                shutil.rmtree(agent_out_dir)

    if client:
        _continue = str(raw_input(
            "\nFiles in " + client_out_dir + " will be erased, continue?[Y/n]\n"))
        if _continue == "N" or _continue == "n":
            print("Aborting execution...")
            exit(-1)
        else:
            if client and os.path.isdir(client_out_dir):
                shutil.rmtree(client_out_dir)

if agent and os.path.isdir(os.path.join(agent_out_dir, "idl")):
    shutil.rmtree(os.path.join(agent_out_dir, "idl"))

uorb_templates_dir = os.path.join(msg_folder, args.uorb_templates)
urtps_templates_dir = os.path.join(msg_folder, args.urtps_templates)
# parse yaml file into a map of ids
rtps_ids = parse_yaml_msg_id_file(os.path.join(msg_folder, args.yaml_file))
# check if there are no ID's repeated
check_rtps_id_uniqueness(rtps_ids)


uRTPS_CLIENT_TEMPL_FILE = 'microRTPS_client.cpp.template'
uRTPS_AGENT_TOPICS_H_TEMPL_FILE = 'RtpsTopics.h.template'
uRTPS_AGENT_TOPICS_SRC_TEMPL_FILE = 'RtpsTopics.cpp.template'
uRTPS_AGENT_TEMPL_FILE = 'microRTPS_agent.cpp.template'
uRTPS_AGENT_CMAKELISTS_TEMPL_FILE = 'microRTPS_agent_CMakeLists.txt.template'
uRTPS_PUBLISHER_SRC_TEMPL_FILE = 'Publisher.cpp.template'
uRTPS_PUBLISHER_H_TEMPL_FILE = 'Publisher.h.template'
uRTPS_SUBSCRIBER_SRC_TEMPL_FILE = 'Subscriber.cpp.template'
uRTPS_SUBSCRIBER_H_TEMPL_FILE = 'Subscriber.h.template'


def generate_agent(out_dir):

    if msg_files_send:
        for msg_file in msg_files_send:
            if gen_idl:
                if out_dir != agent_out_dir:
                    px_generate_uorb_topic_files.generate_idl_file(msg_file, os.path.join(out_dir, "/idl"), urtps_templates_dir,
                                                                   package, px_generate_uorb_topic_files.INCL_DEFAULT, rtps_ids)
                else:
                    px_generate_uorb_topic_files.generate_idl_file(msg_file, idl_dir, urtps_templates_dir,
                                                                   package, px_generate_uorb_topic_files.INCL_DEFAULT, rtps_ids)
            px_generate_uorb_topic_files.generate_topic_file(msg_file, out_dir, urtps_templates_dir,
                                                             package, px_generate_uorb_topic_files.INCL_DEFAULT, rtps_ids, uRTPS_PUBLISHER_SRC_TEMPL_FILE)
            px_generate_uorb_topic_files.generate_topic_file(msg_file, out_dir, urtps_templates_dir,
                                                             package, px_generate_uorb_topic_files.INCL_DEFAULT, rtps_ids, uRTPS_PUBLISHER_H_TEMPL_FILE)

    if msg_files_receive:
        for msg_file in msg_files_receive:
            if gen_idl:
                if out_dir != agent_out_dir:
                    px_generate_uorb_topic_files.generate_idl_file(msg_file, os.path.join(out_dir, "/idl"), urtps_templates_dir,
                                                                   package, px_generate_uorb_topic_files.INCL_DEFAULT, rtps_ids)
                else:
                    px_generate_uorb_topic_files.generate_idl_file(msg_file, idl_dir, urtps_templates_dir,
                                                                   package, px_generate_uorb_topic_files.INCL_DEFAULT, rtps_ids)
            px_generate_uorb_topic_files.generate_topic_file(msg_file, out_dir, urtps_templates_dir,
                                                             package, px_generate_uorb_topic_files.INCL_DEFAULT, rtps_ids, uRTPS_SUBSCRIBER_SRC_TEMPL_FILE)
            px_generate_uorb_topic_files.generate_topic_file(msg_file, out_dir, urtps_templates_dir,
                                                             package, px_generate_uorb_topic_files.INCL_DEFAULT, rtps_ids, uRTPS_SUBSCRIBER_H_TEMPL_FILE)

    px_generate_uorb_topic_files.generate_uRTPS_general(msg_files_send, msg_files_receive, out_dir, urtps_templates_dir,
                                                        package, px_generate_uorb_topic_files.INCL_DEFAULT, rtps_ids, uRTPS_AGENT_TEMPL_FILE)
    px_generate_uorb_topic_files.generate_uRTPS_general(msg_files_send, msg_files_receive, out_dir, urtps_templates_dir,
                                                        package, px_generate_uorb_topic_files.INCL_DEFAULT, rtps_ids, uRTPS_AGENT_TOPICS_H_TEMPL_FILE)
    px_generate_uorb_topic_files.generate_uRTPS_general(msg_files_send, msg_files_receive, out_dir, urtps_templates_dir,
                                                        package, px_generate_uorb_topic_files.INCL_DEFAULT, rtps_ids, uRTPS_AGENT_TOPICS_SRC_TEMPL_FILE)
    if cmakelists:
        px_generate_uorb_topic_files.generate_uRTPS_general(msg_files_send, msg_files_receive, out_dir, urtps_templates_dir,
                                                            package, px_generate_uorb_topic_files.INCL_DEFAULT, rtps_ids, uRTPS_AGENT_CMAKELISTS_TEMPL_FILE)

    # Final steps to install agent
    mkdir_p(os.path.join(out_dir, "fastrtpsgen"))
    prev_cwd_path = os.getcwd()
    os.chdir(os.path.join(out_dir, "fastrtpsgen"))
    if not glob.glob(os.path.join(idl_dir, "*.idl")):
        raise Exception("No IDL files found in %s" % idl_dir)
    for idl_file in glob.glob(os.path.join(idl_dir, "*.idl")):
        ret = subprocess.call(fastrtpsgen_path + " -d " + out_dir +
                              "/fastrtpsgen -example x64Linux2.6gcc " + fastrtpsgen_include + idl_file, shell=True)
        if ret:
            raise Exception(
                "fastrtpsgen not found. Specify the location of fastrtpsgen with the -f flag")
    rm_wildcard(os.path.join(out_dir, "fastrtpsgen/*PubSubMain*"))
    rm_wildcard(os.path.join(out_dir, "fastrtpsgen/makefile*"))
    rm_wildcard(os.path.join(out_dir, "fastrtpsgen/*Publisher*"))
    rm_wildcard(os.path.join(out_dir, "fastrtpsgen/*Subscriber*"))
    for f in glob.glob(os.path.join(out_dir, "fastrtpsgen/*.cxx")):
        os.rename(f, f.replace(".cxx", ".cpp"))
    cp_wildcard(os.path.join(out_dir, "fastrtpsgen/*"), out_dir)
    if os.path.isdir(os.path.join(out_dir, "fastrtpsgen")):
        shutil.rmtree(os.path.join(out_dir, "fastrtpsgen"))
    cp_wildcard(os.path.join(urtps_templates_dir,
                             "microRTPS_transport.*"), agent_out_dir)
    if cmakelists:
        os.rename(os.path.join(out_dir, "microRTPS_agent_CMakeLists.txt"),
                  os.path.join(out_dir, "CMakeLists.txt"))
    if (mkdir_build):
        mkdir_p(os.path.join(out_dir, "build"))
    os.chdir(prev_cwd_path)
    return 0


def rm_wildcard(pattern):
    for f in glob.glob(pattern):
        os.remove(f)


def cp_wildcard(pattern, destdir):
    for f in glob.glob(pattern):
        shutil.copy(f, destdir)


def mkdir_p(dirpath):
    try:
        os.makedirs(dirpath)
    except OSError as e:
        if e.errno == errno.EEXIST and os.path.isdir(dirpath):
            pass
        else:
            raise


def generate_client(out_dir):

    # Rename work in the default path
    if default_client_out != out_dir:
        def_file = os.path.join(default_client_out, "microRTPS_client.cpp")
        if os.path.isfile(def_file):
            os.rename(def_file, def_file.replace(".cpp", ".cpp_"))
        def_file = os.path.join(default_client_out, "microRTPS_transport.cpp")
        if os.path.isfile(def_file):
            os.rename(def_file, def_file.replace(".cpp", ".cpp_"))
        def_file = os.path.join(default_client_out, "microRTPS_transport.h")
        if os.path.isfile(def_file):
            os.rename(def_file, def_file.replace(".h", ".h_"))

    px_generate_uorb_topic_files.generate_uRTPS_general(msg_files_send, msg_files_receive, out_dir, uorb_templates_dir,
                                                        package, px_generate_uorb_topic_files.INCL_DEFAULT, rtps_ids, uRTPS_CLIENT_TEMPL_FILE)

    # Final steps to install client
    cp_wildcard(os.path.join(urtps_templates_dir,
                             "microRTPS_transport.*"), out_dir)

    return 0


if agent:
    generate_agent(agent_out_dir)
    print("\nAgent created in: " + agent_out_dir)

if client:
    generate_client(client_out_dir)
    print("\nClient created in: " + client_out_dir)