#!/usr/bin/env python3

r"""
PEL functions.
"""

import func_args as fa
import bmc_ssh_utils as bsu
import pel_variables

import json
import os
import sys
from robot.libraries.BuiltIn import BuiltIn

base_path = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
sys.path.append(base_path + "/data/")


class peltool_exception(Exception):
    r"""
    Base class for peltool related exceptions.
    """

    def __init__(self, message):
        self.message = message
        super().__init__(self.message)


def peltool(option_string, parse_json=True, **bsu_options):
    r"""
    Run peltool on the BMC with the caller's option string and return the result.

    Example:

    ${pel_results}=  Peltool  -l
    Rprint Vars  pel_results

    pel_results:
      [0x50000031]:
        [CompID]:                       0x1000
        [PLID]:                         0x50000031
        [Subsystem]:                    BMC Firmware
        [Message]:                      An application had an internal failure
        [SRC]:                          BD8D1002
        [Commit Time]:                  02/25/2020  04:51:31
        [Sev]:                          Unrecoverable Error
        [CreatorID]:                    BMC

    Description of argument(s):
    option_string                   A string of options which are to be processed by the peltool command.
    parse_json                      Indicates that the raw JSON data should parsed into a list of
                                    dictionaries.
    bsu_options                     Options to be passed directly to bmc_execute_command. See its prolog for
                                    details.
    """

    bsu_options = fa.args_to_objects(bsu_options)
    out_buf, stderr, rc = bsu.bmc_execute_command('peltool ' + option_string, **bsu_options)
    if parse_json:
        try:
            return json.loads(out_buf)
        except ValueError:
            return {}
    return out_buf


def get_pel_data_from_bmc(include_hidden_pels=False,
                          include_informational_pels=False):
    r"""
    Returns PEL data from BMC else throws exception.

    Description of arguments:
    include_hidden_pels           True/False (default: False).
                                  Set True to get hidden PELs else False.
    include_informational_pels    True/False (default: False).
                                  Set True to get informational PELs else False.
    """
    try:
        pel_cmd = " -l"
        if include_hidden_pels:
            pel_cmd = pel_cmd + " -h"
        if include_informational_pels:
            pel_cmd = pel_cmd + " -f"
        pel_data = peltool(pel_cmd)
        if not pel_data:
            print("No PEL data present in BMC ...")
    except Exception as e:
        raise peltool_exception("Failed to get PEL data from BMC : " + str(e))
    return pel_data


def fetch_all_pel_ids_for_src(src_id, severity, include_hidden_pels=False):
    r"""
    Fetch all PEL IDs for the input SRC ID based on the severity type
    in the list format.

    Description of arguments:
    src_id                SRC ID (e.g. BCXXYYYY).
    severity              PEL severity (e.g. "Predictive Error"
                                             "Recovered Error").
    include_hidden_pels   True/False (default: False).
                          Set True to get hidden PELs else False.
    """

    try:
        src_pel_ids = []
        pel_data = get_pel_data_from_bmc(include_hidden_pels)
        pel_id_list = pel_data.keys()
        for pel_id in pel_id_list:
            # Check if required SRC ID with severity is present
            if ((pel_data[pel_id]["SRC"] == src_id) and (pel_data[pel_id]["Sev"] == severity)):
                src_pel_ids.append(pel_id)

        if not src_pel_ids:
            raise peltool_exception(src_id + " with severity " + severity + " not present")
    except Exception as e:
        raise peltool_exception("Failed to fetch PEL ID for required SRC : " + str(e))
    return src_pel_ids


def fetch_all_src(include_hidden_pels=False):
    r"""
    Fetch all SRC IDs from peltool in the list format.

    include_hidden_pels       True/False (default: False).
                              Set True to get hidden PELs else False.
    """
    try:
        src_id = []
        pel_data = get_pel_data_from_bmc(include_hidden_pels)
        if pel_data:
            pel_id_list = pel_data.keys()
            for pel_id in pel_id_list:
                src_id.append(pel_data[pel_id]["SRC"])
        print("SRC IDs: " + str(src_id))
    except Exception as e:
        raise peltool_exception("Failed to fetch all SRCs : " + str(e))
    return src_id


def check_for_unexpected_src(unexpected_src_list=[], include_hidden_pels=False):
    r"""
    From the given unexpected SRC list, check if any unexpected SRC created
    on the BMC. Returns 0 if no SRC found else throws exception.

    Description of arguments:
    unexpected_src_list       Give unexpected SRCs in the list format.
                              e.g.: ["BBXXYYYY", "AAXXYYYY"].

    include_hidden_pels       True/False (default: False).
                              Set True to get hidden PELs else False.
    """
    try:
        unexpected_src_count = 0
        if not unexpected_src_list:
            print("Unexpected SRC list is empty.")
        src_data = fetch_all_src(include_hidden_pels)
        for src in unexpected_src_list:
            if src in src_data:
                print("Found an unexpected SRC : " + src)
                unexpected_src_count = unexpected_src_count + 1
        if (unexpected_src_count >= 1):
            raise peltool_exception("Unexpected SRC found.")

    except Exception as e:
        raise peltool_exception("Failed to verify unexpected SRC list : " + str(e))
    return unexpected_src_count


def filter_unexpected_srcs(expected_srcs=None):
    r"""
    Return list of SRCs found in BMC after filtering expected SRCs.
    If expected_srcs is None then all SRCs found in system are returned.

    Description of arguments:
    expected_srcs       List of expected SRCs. E.g. ["BBXXYYYY", "AAXXYYYY"].
    """

    srcs_found = fetch_all_src()
    if not expected_srcs:
        expected_srcs = []
    print(expected_srcs)
    return list(set(srcs_found) - set(expected_srcs))


def get_bmc_event_log_id_for_pel(pel_id):
    r"""
    Return BMC event log ID for the given PEL ID.

    Description of arguments:
    pel_id       PEL ID. E.g. 0x50000021.
    """

    pel_data = peltool("-i " + pel_id)
    print(pel_data)
    bmc_id_for_pel = pel_data["Private Header"]["BMC Event Log Id"]
    return bmc_id_for_pel