#!/bin/sh

###########################################################################
#
# Copyright (c) 2021-2023 Diality Inc. - All Rights Reserved.
#
# THIS CODE MAY NOT BE COPIED OR REPRODUCED IN ANY FORM, IN PART OR IN
# WHOLE, WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER.
#
# @file    factory_reset.sh
#
# @author  (last)      Vy Duong
# @date    (last)      26-May-2023
# @author  (original)  Vy Duong
# @date    (original)  26-May-2023
#
############################################################################

# Description
#   - delete WiFi settings
#   - delete Bluetooth settings
#   - settings.conf to default
#   - brightness to default (5)
#   - delete logs
#   - keep partition password
#   - keep service password
#   - keep cloudsync tokens
# Parameters
#   - None

# sources
. ./_errors_
. ./_functions_

# variables
PARAM_COUNT=0

LOC_SETTINGS_CONF="/opt/leahi/configurations/Settings/System.conf"
LOC_SETTINGS_DFLT="/opt/leahi/configurations/Settings/System.dflt"
LOC_LOG_BASE_FOLDER="/media/sd-card/"
LOC_TX_LOG_BASE_FOLDER="/opt/leahi/configurations/treatment/"
LOC_SCRIPTS=/opt/leahi/scripts
LOC_SCRIPTS_BRIGHTNESS=$LOC_SCRIPTS/brightness.sh

DEFAULT_BRIGHTNESS_LEVEL=5

TRUE=1
FALSE=0

# functions
function deleteWiFi() {
    $LOC_SCRIPTS/wifi_disconnect_network.sh wlan0
}

function deleteBluetooth() {
    $LOC_SCRIPTS/bluetooth_paired_clear.sh
}

function defaultSettings() {
    servicePasswordLine=$(grep -A1 "\[Service\]" "$LOC_SETTINGS_CONF" | grep Password)      # store the service password line
    check_result "$?" "$ERR_CMDFAIL_SETTINGS_CONF_PASSNOTFOUND"

    cp $LOC_SETTINGS_DFLT $LOC_SETTINGS_CONF                                           # reset the settings to default settings
    check_result "$?" "$ERR_CMDFAIL_SETTINGS_CONF_OVERWRITE"

    sed -i "s/^.*Password.*$/$servicePasswordLine/" $LOC_SETTINGS_CONF                 # keep  the service password
    check_result "$?" "$ERR_CMDFAIL_SETTINGS_DFLT_RESTORE"
}

function defaultBrightness() {
    $LOC_SCRIPTS_BRIGHTNESS $DEFAULT_BRIGHTNESS_LEVEL
}

function deleteLogFiles() {
    # handling log deletion in a special manner:
    #  - Log files generated today
    #     - are not deleted
    #     - not part of the checking whether deletion was successful
    #  - setting maxDepth to 2 due to path used is root level with sd-card/<log/service/etc> folders of logs
    # NOTE: find command always return true / non-zero! when using with exec
    # TODO: Checking the file count should be fixed later

    # Remove the contents of the log folder
    rm "$LOC_LOG_BASE_FOLDER"/log/*
    _has_error_=!$?
    check_result $_has_error_ "$ERR_CMDFAIL_SETTINGS_REMOVE_LOG_FOLDER"

    # Remove the contents of the service folder
    rm "$LOC_LOG_BASE_FOLDER"/service/*
    _has_error_=!$?
    check_result $_has_error_ "$ERR_CMDFAIL_SETTINGS_REMOVE_SERVICE_LOG"

    fileCount=$(find "$LOC_LOG_BASE_FOLDER" -maxdepth 2 -type f -daystart -mtime +0 | wc -l)
    _has_error_=$fileCount
    check_result $_has_error_ "$ERR_CMDFAIL_SETTINGS_COUNT_SERVICE_LOG"

    # Deleting treatment logs in encrypted partition:
    find "$LOC_TX_LOG_BASE_FOLDER" -maxdepth 2 -type f | xargs rm
    _has_error_=!$?
    check_result $_has_error_ "$ERR_CMDFAIL_SETTINGS_REMOVE_TX_LOG"

    fileCount=$(find "$LOC_TX_LOG_BASE_FOLDER" -maxdepth 2 -type f | wc -l)
    _has_error_=$fileCount
    check_result $_has_error_ "$ERR_CMDFAIL_SETTINGS_COUNT_TX_LOG"
}

function main() {
    deleteWiFi
    deleteBluetooth
    defaultSettings
    defaultBrightness
    deleteLogFiles
}

# checks
check_param_count  "$#" "$PARAM_COUNT"

# main
main

# exit gracefully
sleep 0.1
echo ""
exit 0