# 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 os
from os.path import isdir, isfile, join

from twisted.internet import reactor  # pylint: disable=import-error

from platformio import fs, util
from platformio.commands.debug.exception import DebugInvalidOptionsError
from platformio.commands.debug.helpers import escape_gdbmi_stream, is_gdbmi_mode
from platformio.commands.debug.process import BaseProcess
from platformio.proc import where_is_program


class DebugServer(BaseProcess):
    def __init__(self, debug_options, env_options):
        self.debug_options = debug_options
        self.env_options = env_options

        self._debug_port = None
        self._transport = None
        self._process_ended = False

    def spawn(self, patterns):  # pylint: disable=too-many-branches
        systype = util.get_systype()
        server = self.debug_options.get("server")
        if not server:
            return None
        server = self.apply_patterns(server, patterns)
        server_executable = server["executable"]
        if not server_executable:
            return None
        if server["cwd"]:
            server_executable = join(server["cwd"], server_executable)
        if (
            "windows" in systype
            and not server_executable.endswith(".exe")
            and isfile(server_executable + ".exe")
        ):
            server_executable = server_executable + ".exe"

        if not isfile(server_executable):
            server_executable = where_is_program(server_executable)
        if not isfile(server_executable):
            raise DebugInvalidOptionsError(
                "\nCould not launch Debug Server '%s'. Please check that it "
                "is installed and is included in a system PATH\n\n"
                "See documentation or contact contact@platformio.org:\n"
                "https://docs.platformio.org/page/plus/debugging.html\n"
                % server_executable
            )

        self._debug_port = ":3333"
        openocd_pipe_allowed = all(
            [not self.debug_options["port"], "openocd" in server_executable]
        )
        if openocd_pipe_allowed:
            args = []
            if server["cwd"]:
                args.extend(["-s", server["cwd"]])
            args.extend(
                ["-c", "gdb_port pipe; tcl_port disabled; telnet_port disabled"]
            )
            args.extend(server["arguments"])
            str_args = " ".join(
                [arg if arg.startswith("-") else '"%s"' % arg for arg in args]
            )
            self._debug_port = '| "%s" %s' % (server_executable, str_args)
            self._debug_port = fs.to_unix_path(self._debug_port)
        else:
            env = os.environ.copy()
            # prepend server "lib" folder to LD path
            if (
                "windows" not in systype
                and server["cwd"]
                and isdir(join(server["cwd"], "lib"))
            ):
                ld_key = (
                    "DYLD_LIBRARY_PATH" if "darwin" in systype else "LD_LIBRARY_PATH"
                )
                env[ld_key] = join(server["cwd"], "lib")
                if os.environ.get(ld_key):
                    env[ld_key] = "%s:%s" % (env[ld_key], os.environ.get(ld_key))
            # prepend BIN to PATH
            if server["cwd"] and isdir(join(server["cwd"], "bin")):
                env["PATH"] = "%s%s%s" % (
                    join(server["cwd"], "bin"),
                    os.pathsep,
                    os.environ.get("PATH", os.environ.get("Path", "")),
                )

            self._transport = reactor.spawnProcess(
                self,
                server_executable,
                [server_executable] + server["arguments"],
                path=server["cwd"],
                env=env,
            )
            if "mspdebug" in server_executable.lower():
                self._debug_port = ":2000"
            elif "jlink" in server_executable.lower():
                self._debug_port = ":2331"
            elif "qemu" in server_executable.lower():
                self._debug_port = ":1234"

        return self._transport

    def get_debug_port(self):
        return self._debug_port

    def outReceived(self, data):
        super(DebugServer, self).outReceived(
            escape_gdbmi_stream("@", data) if is_gdbmi_mode() else data
        )

    def processEnded(self, reason):
        self._process_ended = True
        super(DebugServer, self).processEnded(reason)

    def terminate(self):
        if self._process_ended or not self._transport:
            return
        try:
            self._transport.signalProcess("KILL")
        except:  # pylint: disable=bare-except
            pass