#!/usr/bin/env python

r"""
This module provides functions which are useful to plug-ins call-point
programs that wish to make external robot program calls.
"""

import sys
import os
import subprocess
import re
import time
import imp

import gen_print as gp
import gen_valid as gv
import gen_misc as gm
import gen_cmd as gc

base_path = \
    os.path.dirname(os.path.dirname(imp.find_module("gen_robot_print")[1])) +\
    os.sep


def init_robot_out_parms(extra_prefix=""):
    r"""
    Initialize robot output parms such as outputdir, output, etc.

    This function will set global values for the following robot output parms.

    outputdir, output, log, report, loglevel

    This function would typically be called prior to calling
    create_robot_cmd_string.

    Description of argument(s):
    extra_prefix                    An extra prefix to be appended to the
                                    default prefix for output file names.
    """

    gp.dprint_executing()
    AUTOBOOT_OPENBMC_NICKNAME = gm.get_mod_global("AUTOBOOT_OPENBMC_NICKNAME")

    # Set values for call to create_robot_cmd_string.
    # Environment variable TMP_ROBOT_DIR_PATH can be set by the user to
    # indicate that robot-generated output should initially be written to the
    # specified temporary directory and then moved to the normal output
    # location after completion.
    outputdir =\
        os.environ.get("TMP_ROBOT_DIR_PATH",
                       os.environ.get("STATUS_DIR_PATH",
                                      os.environ.get("HOME", ".")
                                      + "/status"))
    outputdir = gm.add_trailing_slash(outputdir)
    seconds = time.time()
    loc_time = time.localtime(seconds)
    time_string = time.strftime("%y%m%d.%H%M%S", loc_time)
    file_prefix = AUTOBOOT_OPENBMC_NICKNAME + "." + extra_prefix +\
        time_string + "."
    # Environment variable SAVE_STATUS_POLICY governs when robot-generated
    # output files (e.g. the log.html) will be moved from TMP_ROBOT_DIR_PATH
    # to FFDC_DIR_PATH.  Valid values are "ALWAYS", "NEVER" and "FAIL".
    SAVE_STATUS_POLICY = os.environ.get("SAVE_STATUS_POLICY", "ALWAYS")
    if SAVE_STATUS_POLICY == "NEVER":
        output = "NONE"
        log = "NONE"
        report = "NONE"
    else:
        output = file_prefix + "output.xml"
        log = file_prefix + "log.html"
        report = file_prefix + "report.html"
    loglevel = "TRACE"

    # Make create_robot_cmd_string values global.
    gm.set_mod_global(outputdir)
    gm.set_mod_global(output)
    gm.set_mod_global(log)
    gm.set_mod_global(report)
    gm.set_mod_global(loglevel)


def init_robot_test_base_dir_path():
    r"""
    Initialize and validate the environment variable, ROBOT_TEST_BASE_DIR_PATH
    and set corresponding global variable ROBOT_TEST_RUNNING_FROM_SB.

    If ROBOT_TEST_BASE_DIR_PATH is already set, this function will merely
    validate it.  This function will also set environment variable
    ROBOT_TEST_RUNNING_FROM_SB when ROBOT_TEST_BASE_DIR_PATH is not pre-set.
    """

    # ROBOT_TEST_BASE_DIR_PATH will be set as follows:
    # This function will determine whether we are running in a user sandbox
    # or from a standard apolloxxx environment.
    # - User sandbox:
    # If there is a <developer's home dir>/git/openbmc-test-automation/,
    # ROBOT_TEST_BASE_DIR_PATH will be set to that path.  Otherwise, we set it
    # to <program dir path>/git/openbmc-test-automation/
    # - Not in user sandbox:
    # ROBOT_TEST_BASE_DIR_PATH will be set to <program dir
    # path>/git/openbmc-test-automation/

    ROBOT_TEST_BASE_DIR_PATH = os.environ.get('ROBOT_TEST_BASE_DIR_PATH', "")
    ROBOT_TEST_RUNNING_FROM_SB = \
        int(os.environ.get('ROBOT_TEST_RUNNING_FROM_SB', "0"))
    if ROBOT_TEST_BASE_DIR_PATH == "":
        # ROBOT_TEST_BASE_DIR_PATH was not set by user/caller.
        AUTOIPL_VERSION = os.environ.get('AUTOIPL_VERSION', '')
        if AUTOIPL_VERSION == "":
            ROBOT_TEST_BASE_DIR_PATH = base_path
        else:
            suffix = "git/openbmc-test-automation/"

            # Determine whether we're running out of a developer sandbox or
            # simply out of an apolloxxx/bin path.
            shell_rc, out_buf = gc.shell_cmd('dirname $(which gen_print.py)',
                                             quiet=(not debug), print_output=0)
            executable_base_dir_path = os.path.realpath(out_buf.rstrip()) + "/"
            apollo_dir_path = os.environ['AUTO_BASE_PATH'] + AUTOIPL_VERSION +\
                "/bin/"
            developer_home_dir_path = re.sub('/sandbox.*', '',
                                             executable_base_dir_path)
            developer_home_dir_path = \
                gm.add_trailing_slash(developer_home_dir_path)
            gp.dprint_vars(executable_base_dir_path, developer_home_dir_path,
                           apollo_dir_path)

            ROBOT_TEST_RUNNING_FROM_SB = 0
            if executable_base_dir_path != apollo_dir_path:
                ROBOT_TEST_RUNNING_FROM_SB = 1
                gp.dprint_vars(ROBOT_TEST_RUNNING_FROM_SB)
                ROBOT_TEST_BASE_DIR_PATH = developer_home_dir_path + suffix
                if not os.path.isdir(ROBOT_TEST_BASE_DIR_PATH):
                    gp.dprint_timen("NOTE: Sandbox directory "
                                    + ROBOT_TEST_BASE_DIR_PATH + " does not"
                                    + " exist.")
                    # Fall back to the apollo dir path.
                    ROBOT_TEST_BASE_DIR_PATH = apollo_dir_path + suffix
            else:
                # Use to the apollo dir path.
                ROBOT_TEST_BASE_DIR_PATH = apollo_dir_path + suffix

    if not gv.valid_value(ROBOT_TEST_BASE_DIR_PATH):
        return False
    gp.dprint_vars(ROBOT_TEST_RUNNING_FROM_SB, ROBOT_TEST_BASE_DIR_PATH)
    if not gv.valid_dir_path(ROBOT_TEST_BASE_DIR_PATH):
        return False

    ROBOT_TEST_BASE_DIR_PATH = gm.add_trailing_slash(ROBOT_TEST_BASE_DIR_PATH)
    gm.set_mod_global(ROBOT_TEST_BASE_DIR_PATH)
    os.environ['ROBOT_TEST_BASE_DIR_PATH'] = ROBOT_TEST_BASE_DIR_PATH

    gm.set_mod_global(ROBOT_TEST_RUNNING_FROM_SB)
    os.environ['ROBOT_TEST_RUNNING_FROM_SB'] = str(ROBOT_TEST_RUNNING_FROM_SB)


raw_robot_file_search_path = "${ROBOT_TEST_BASE_DIR_PATH}:" +\
    "${ROBOT_TEST_BASE_DIR_PATH}tests:${ROBOT_TEST_BASE_DIR_PATH}extended:" +\
    "${ROBOT_TEST_BASE_DIR_PATH}scratch:${PATH}"


def init_robot_file_path(robot_file_path):
    r"""
    Determine full path name for the file path passed in robot_file_path and
    return it.

    If robot_file_path contains a fully qualified path name, this function
    will verify that the file exists.  If robot_file_path contains a relative
    path, this function will search for the file and set robot_file_path so
    that it contains the absolute path to the robot file.  This function will
    search for the robot file using the raw_robot_file_search_path (defined
    above).  Note that if ROBOT_TEST_BASE_DIR_PATH is not set, this function
    will call init_robot_test_base_dir_path to set it.

    Description of arguments:
    robot_file_path                 The absolute or relative path to a robot
                                    file.
    """

    if not gv.valid_value(robot_file_path):
        raise ValueError('Programmer error.')

    try:
        if ROBOT_TEST_BASE_DIR_PATH is NONE:
            init_robot_test_base_dir_path()
    except NameError:
        init_robot_test_base_dir_path()

    if not re.match(r".*\.(robot|py)$", robot_file_path):
        # No suffix so we'll assign one of "\.robot".
        robot_file_path = robot_file_path + ".robot"

    abs_path = 0
    if robot_file_path[0:1] == "/":
        abs_path = 1

    gp.dprint_vars(abs_path, robot_file_path)

    if not abs_path:
        cmd_buf = "echo -n \"" + raw_robot_file_search_path + "\""
        shell_rc, out_buf = gc.shell_cmd(cmd_buf, quiet=(not debug),
                                         print_output=0)
        robot_file_search_paths = out_buf
        gp.dprint_var(robot_file_search_paths)
        robot_file_search_paths_list = robot_file_search_paths.split(':')
        for search_path in robot_file_search_paths_list:
            search_path = gm.add_trailing_slash(search_path)
            candidate_file_path = search_path + robot_file_path
            gp.dprint_var(candidate_file_path)
            if os.path.isfile(candidate_file_path):
                gp.dprint_timen("Found full path to " + robot_file_path + ".")
                robot_file_path = candidate_file_path
                break

    gp.dprint_var(robot_file_path)
    if not gv.valid_file_path(robot_file_path):
        raise ValueError('Programmer error.')

    return robot_file_path


def get_robot_parm_names():
    r"""
    Return a list containing all of the long parm names (e.g. --outputdir)
    supported by the robot program.  Double dashes are not included in the
    names returned.
    """

    cmd_buf = "robot -h | egrep " +\
        "'^([ ]\\-[a-zA-Z0-9])?[ ]+--[a-zA-Z0-9]+[ ]+' | sed -re" +\
        " s'/.*\\-\\-//g' -e s'/ .*//g' | sort -u"
    shell_rc, out_buf = gc.shell_cmd(cmd_buf, quiet=1, print_output=0)

    return out_buf.split("\n")


def create_robot_cmd_string(robot_file_path, *parms):
    r"""
    Create a robot command string and return it.  On failure, return an empty
    string.

    Description of arguments:
    robot_file_path                 The path to the robot file to be run.
    parms                           The list of parms to be included in the
                                    command string.  The name of each variable
                                    in this list must be the same as the name
                                    of the corresponding parm.  This function
                                    figures out that name.  This function is
                                    also able to distinguish robot parms (e.g.
                                    --outputdir) from robot program parms (all
                                    other parms which will be passed as "-v
                                    PARM_NAME:parm_value")..

    Example:

    The following call to this function...
    cmd_buf = create_robot_cmd_string("tools/start_sol_console.robot",
    OPENBMC_HOST, quiet, test_mode, debug, outputdir, output, log, report)

    Would return a string something like this.
    robot -v OPENBMC_HOST:beye6 -v quiet:0 -v test_mode:1 -v debug:1
    --outputdir=/gsa/ausgsa/projects/a/status
    --output=beye6.OS_Console.output.xml --log=beye6.OS_Console.log.html
    --report=beye6.OS_Console.report.html tools/start_sol_console.robot
    """

    robot_file_path = init_robot_file_path(robot_file_path)

    robot_parm_names = get_robot_parm_names()

    robot_parm_list = []

    stack_frame = 2
    ix = 2
    for arg in parms:
        parm = arg
        parm = gm.quote_bash_parm(gm.escape_bash_quotes(str(parm)))
        var_name = gp.get_arg_name(None, ix, stack_frame)
        if var_name in robot_parm_names:
            p_string = "--" + var_name + "=" + str(parm)
            robot_parm_list.append(p_string)
        else:
            p_string = "-v " + var_name + ":" + str(parm)
            robot_parm_list.append(p_string)
        ix += 1

    robot_cmd_buf = "robot " + ' '.join(robot_parm_list) + " " +\
        robot_file_path

    return robot_cmd_buf


# Global variables to aid in cleanup after running robot_cmd_fnc.
gcr_last_robot_cmd_buf = ""
gcr_last_robot_rc = 0


def process_robot_output_files(robot_cmd_buf=None,
                               robot_rc=None,
                               gzip=None):
    r"""
    Process robot output files which can involve several operations:
    - If the files are in a temporary location, using SAVE_STATUS_POLICY to
      decide whether to move them to a permanent location or to delete them.
    - Gzipping them.

    Description of argument(s):
    robot_cmd_buf                   The complete command string used to invoke
                                    robot.
    robot_rc                        The return code from running the robot
                                    command string.
    gzip                            Indicates whether robot-generated output
                                    should be gzipped.
    """

    robot_cmd_buf = gm.dft(robot_cmd_buf, gcr_last_robot_cmd_buf)
    robot_rc = gm.dft(robot_rc, gcr_last_robot_rc)
    gzip = gm.dft(gzip, int(os.environ.get("GZIP_ROBOT", "1")))

    if robot_cmd_buf == "":
        # This can legitimately occur if this function is called from an
        # exit_function without the program having ever run robot_cmd_fnc.
        return

    SAVE_STATUS_POLICY = os.environ.get("SAVE_STATUS_POLICY", "ALWAYS")
    gp.qprint_vars(SAVE_STATUS_POLICY)

    # When SAVE_STATUS_POLICY is "NEVER" robot output files don't even get
    # generated.
    if SAVE_STATUS_POLICY == "NEVER":
        return

    # Compose file_list based on robot command buffer passed in.
    robot_cmd_buf_dict = gc.parse_command_string(robot_cmd_buf)
    outputdir = robot_cmd_buf_dict['outputdir']
    outputdir = gm.add_trailing_slash(outputdir)
    file_list = outputdir + robot_cmd_buf_dict['output'] + " " + outputdir\
        + robot_cmd_buf_dict['log'] + " " + outputdir\
        + robot_cmd_buf_dict['report']

    # Double checking that files are present.
    shell_rc, out_buf = gc.shell_cmd("ls -1 " + file_list + " 2>/dev/null",
                                     show_err=0)
    file_list = re.sub("\n", " ", out_buf.rstrip("\n"))

    if file_list == "":
        gp.qprint_timen("No robot output files were found in " + outputdir
                        + ".")
        return
    gp.qprint_var(robot_rc, gp.hexa())
    if SAVE_STATUS_POLICY == "FAIL" and robot_rc == 0:
        gp.qprint_timen("The call to robot produced no failures."
                        + "  Deleting robot output files.")
        gc.shell_cmd("rm -rf " + file_list)
        return

    if gzip:
        gc.shell_cmd("gzip -f " + file_list)
        # Update the values in file_list.
        file_list = re.sub(" ", ".gz ", file_list) + ".gz"

    # It TMP_ROBOT_DIR_PATH is set, it means the caller wanted the robot
    # output initially directed to TMP_ROBOT_DIR_PATH but later moved to
    # FFDC_DIR_PATH.  Otherwise, we're done.

    if os.environ.get("TMP_ROBOT_DIR_PATH", "") is "":
        return

    # We're directing these to the FFDC dir path so that they'll be subjected
    # to FFDC cleanup.
    target_dir_path = os.environ.get("FFDC_DIR_PATH",
                                     os.environ.get("HOME", ".")
                                     + "/ffdc")
    target_dir_path = gm.add_trailing_slash(target_dir_path)

    targ_file_list = [re.sub(".*/", target_dir_path, x)
                      for x in file_list.split(" ")]

    gc.shell_cmd("mv " + file_list + " " + target_dir_path + " >/dev/null",
                 time_out=600)

    gp.qprint_timen("New robot log file locations:")
    gp.qprintn('\n'.join(targ_file_list))


def robot_cmd_fnc(robot_cmd_buf,
                  robot_jail=os.environ.get('ROBOT_JAIL', '')):
    r"""
    Run the robot command string.

    This function will set the various PATH variables correctly so that you
    are running the proper version of all imported files, etc.

    Description of argument(s):
    robot_cmd_buf                   The complete robot command string.
    robot_jail                      Indicates that this is to run in "robot
                                    jail" meaning without visibility to any
                                    apolloxxx import files, programs, etc.
    """

    if not gv.valid_value(robot_cmd_buf):
        return False

    # Set global variables to aid in cleanup with process_robot_output_files.
    global gcr_last_robot_cmd_buf
    global gcr_last_robot_rc
    gcr_last_robot_cmd_buf = robot_cmd_buf

    # Get globals set by init_robot_test_base_dir_path().
    module = sys.modules["__main__"]
    try:
        ROBOT_TEST_BASE_DIR_PATH = getattr(module, "ROBOT_TEST_BASE_DIR_PATH")
    except NameError:
        init_robot_test_base_dir_path()
        ROBOT_TEST_BASE_DIR_PATH = getattr(module, "ROBOT_TEST_BASE_DIR_PATH")

    ROBOT_TEST_RUNNING_FROM_SB = \
        gm.get_mod_global("ROBOT_TEST_RUNNING_FROM_SB")

    if robot_jail == "":
        if ROBOT_TEST_RUNNING_FROM_SB:
            robot_jail = 0
        else:
            robot_jail = 1

    robot_jail = int(robot_jail)
    ROBOT_JAIL = os.environ.get('ROBOT_JAIL', '')
    gp.dprint_vars(ROBOT_TEST_BASE_DIR_PATH, ROBOT_TEST_RUNNING_FROM_SB,
                   ROBOT_JAIL, robot_jail)

    OBMC_TOOLS_BASE_DIR_PATH = \
        os.path.dirname(ROBOT_TEST_BASE_DIR_PATH.rstrip("/")) \
        + "/openbmc-tools/"
    openbmctool_dir_path = OBMC_TOOLS_BASE_DIR_PATH + "thalerj"

    # Save PATH and PYTHONPATH to be restored later.
    os.environ["SAVED_PYTHONPATH"] = os.environ.get("PYTHONPATH", "")
    os.environ["SAVED_PATH"] = os.environ.get("PATH", "")

    if robot_jail:
        # Make sure required programs like python and robot can be found in
        # the new restricted PATH.
        required_programs = "python robot"
        # It is expected that there will be a "python" program in the tool
        # base bin path which is really a link to select_version.  Ditto for
        # "robot".  Call each with the --print_only option to get the paths to
        # the "real" programs.
        cmd_buf = "for program in " + required_programs \
            + " ; do dirname $(${program} --print_only) ; done 2>/dev/null"
        rc, out_buf = gc.shell_cmd(cmd_buf, quiet=1, print_output=0)
        PYTHONPATH = ROBOT_TEST_BASE_DIR_PATH + "lib"
        NEW_PATH_LIST = [ROBOT_TEST_BASE_DIR_PATH + "bin"]
        NEW_PATH_LIST.extend(list(set(out_buf.rstrip("\n").split("\n"))))
        NEW_PATH_LIST.extend(["/usr/local/sbin", "/usr/local/bin", "/usr/sbin",
                              "/usr/bin", "/sbin", "/bin",
                              openbmctool_dir_path])
        PATH = ":".join(NEW_PATH_LIST)
    else:
        PYTHONPATH = os.environ.get('PYTHONPATH', '') + ":" +\
            ROBOT_TEST_BASE_DIR_PATH + "lib"
        PATH = os.environ.get('PATH', '') + ":" + ROBOT_TEST_BASE_DIR_PATH +\
            "bin" + ":" + openbmctool_dir_path

    os.environ['PYTHONPATH'] = PYTHONPATH
    os.environ['PATH'] = PATH
    gp.dprint_vars(PATH, PYTHONPATH)

    os.environ['FFDC_DIR_PATH_STYLE'] = os.environ.get('FFDC_DIR_PATH_STYLE',
                                                       '1')
    test_mode = getattr(module, "test_mode")

    gp.qpissuing(robot_cmd_buf, test_mode)
    if test_mode:
        os.environ["PATH"] = os.environ.get("SAVED_PATH", "")
        os.environ["PYTHONPATH"] = os.environ.get("SAVED_PYTHONPATH", "")
        return True

    if quiet:
        DEVNULL = open(os.devnull, 'wb')
        stdout = DEVNULL
    else:
        stdout = None
    sub_proc = subprocess.Popen(robot_cmd_buf, stdout=stdout, shell=True)
    sub_proc.communicate()
    shell_rc = sub_proc.returncode
    os.environ["PATH"] = os.environ.get("SAVED_PATH", "")
    os.environ["PYTHONPATH"] = os.environ.get("SAVED_PYTHONPATH", "")
    gcr_last_robot_rc = shell_rc
    process_robot_output_files()
    if shell_rc != 0:
        gp.print_var(shell_rc, gp.hexa())
        return False

    return True