#!/bin/sh

mode=$1
i2c_bus=$2
chip_slave=$3
server_platform=$4

path=`pwd`
fmt_print="${path}/format_print.sh"
i2c_script="${path}/i2c_${server_platform}.sh"

sensor_name="TMP112"

# @Param1 tmp112 data high 8bit
# @Param2 tmp112 data low 8bit
# @Param3 customization sensor name
convert_tmp112_data(){
    hex_value1=$(echo "$1" | awk '{sub(/^0x/,""); print}')
    hex_value2=$(echo "$2" | awk '{sub(/^0x/,""); print}')
    merge_value="${hex_value1}${hex_value2}"

    # bc calculator recognized upper case only, change data to upper case
    upper_hex_value=$(echo "$merge_value" | awk '{ 
        for(i=1; i<=length($0); i++){ 
            if(tolower(substr($0,i,1)) ~ /^[a-f]$/) 
                printf toupper(substr($0,i,1)); 
            else 
                printf substr($0,i,1); 
        } 
        print "" 
    }')

    # change data from hex to dec
    dec_val=$(echo "ibase=16; $upper_hex_value" | bc)

    binary_number=$(echo "ibase=16;obase=2;$upper_hex_value" | bc)
    bin_length=$(echo $binary_number | awk '{print length($0)}')
    last_digit=$(echo $binary_number | cut -c $bin_length)
    if [ $last_digit -eq 0 ];then
        temp=$(echo "scale=4; $dec_val / 16 * 0.0625" | bc)
    elif [ $last_digit -eq 1 ];then
        temp=$(echo "scale=4; ( $dec_val - 1 ) / 8 * 0.0625" | bc)
    fi

    echo "$3 : $temp"
}

read_tmp112_data(){
    res=`$i2c_script $i2c_bus "1" "$chip_slave" "0x00" "2"`
    convert_tmp112_data $res "$sensor_name"
}


case "${mode}" in
    "read")
        read_tmp112_data
        ;;
    *)
        $fmt_print "console" "Error" "[plugin_tmp112]Unexpected Input Param : $mode"
        ;;
esac