#!/usr/bin/env python3
#
# Copyright (c) 2021 NVIDIA CORPORATION & AFFILIATES.
# Apache-2.0
#
# 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 fwutil.lib import ComponentStatusProvider, PlatformComponentsParser
from sonic_platform.component import ComponentCPLD, MPFAManager

# Globals
FW_STATUS_SCHEDULED = "scheduled"
CPLD_FLAG = False

# Init platform chassis helper classes
csp = ComponentStatusProvider()
pcp = PlatformComponentsParser(csp.is_modular_chassis())

# Parse update status file
update_status = csp.read_au_status_file_if_exists()

if update_status is None:
    exit(0)

# Parse platform components file
try:
    pcp.parse_platform_components()
except Exception as e:
    print("Error parsing platform components. Firmware update failed: {}".format(str(e)))
    print("System will reboot in 10 seconds please fix issue and run update command again.")
    time.sleep(10)
    exit(-1)

# Iterate each component in the status file
comp_install = []
files = []

for boot_type, components in update_status.items():
    for comp in components:

        # Skip if fw isn't scheduled for install at reboot
        if comp["info"] != FW_STATUS_SCHEDULED: continue

        # Get component object and target firmware file
        key = comp["comp"]
        comp_path = key.split("/")

        if len(comp_path) == 3:
            # Module component
            _, parent_name, comp_name = comp_path
            fw_file = pcp.module_component_map[parent_name][comp_name]["firmware"]
            component = csp.module_component_map[parent_name][comp_name]
        else: 
            # Chassis component
            parent_name, comp_name = comp_path
            fw_file = pcp.chassis_component_map[parent_name][comp_name]["firmware"]
            component = csp.chassis_component_map[parent_name][comp_name]

        # Install firmware. If CPLD flag to be installed last due to force reboot during refresh
        if type(component) == ComponentCPLD:
            if CPLD_FLAG:
                # Only need one refresh
                continue
            mpfa = MPFAManager(fw_file)
            mpfa.extract()
            if not mpfa.get_metadata().has_option('firmware', 'refresh'):
                print("Failed to get CPLD refresh firmware. Skipping.")
                continue
            CPLD_FLAG = True
            refresh_firmware = mpfa.get_metadata().get('firmware', 'refresh')
            comp_install = comp_install + [component]
            files = files + [os.path.join(mpfa.get_path(), refresh_firmware)]
        else:
            comp_install = [component] + comp_install
            files = [fw_file] + files

# Do install
for i, c in enumerate(comp_install):
    try:
        if type(c) == ComponentCPLD:
            c.install_firmware(files[i])
        else:
            c.install_firmware(files[i], allow_reboot=False)
    except Exception as e:
        print("Firmware install for {} FAILED with: {}".format(c.get_name(),e))