#!/bin/sh -e
#
# Wrapper for editing DayZ types.xml using xmlstarlet
#
# 01. "should check code directly not $?"
# shellcheck disable=2181
#
# 02. "can't follow . import"
# shellcheck disable=1090,1091
#
# 03. "possible misspelling"
# shellcheck disable=2153
#
# 04. "use find .. over ls"
# shellcheck disable=2011
#----------------------------------------------------------

# =================================================================
# LOAD GLOBALS FILE
# =================================================================
GLOBALS_FILE="$PWD/globals.sh"
if [ -e "$GLOBALS_FILE" ] ; then
    chmod +x "$GLOBALS_FILE"
    . "$GLOBALS_FILE"
else
    >&2 echo "Could not load: $GLOBALS_FILE"
    exit 1
fi
# =================================================================

# example: swap_flag M16A2 count_in_cargo 1 file
swap_flags() {
    file=$4

    if [ ! -f "$file" ] ; then
        >&2 echo "File: '$file' is not a file"
        exit 1
    fi

    if [ "$1" ] && [ "$2" ] && [ "$3" ] ; then
        _name=$1
        _flag=$2
        _value=$3
        xmlstarlet ed -P -L \
            -u \ "//types/type[@name=\"$_name\"]/flags[@$_flag]/@$_flag" \
            -v  \
            "$_value" \
            "$file"
    else
        >&2 echo "Bad params in swap_flag"
        exit 1
    fi
}

# example: swap_value M4A1 nominal 3 file
swap_value() {
    file=$4

    if [ ! -f "$file" ] ; then
        >&2 echo "File: '$file' is not a file"
        exit 1
    fi

    if [ "$1" ] && [ "$2" ] && [ "$3" ] ; then
        _name=$1
        _tag=$2
        _value=$3
        xmlstarlet ed -P -L \
            -u \ "//types/type[@name=\"$_name\"]/$_tag" \
            -v  \
            "$_value" \
            "$file"
    else
        >&2 echo "Bad params in swap_value"
        exit 1
    fi
}

usage() {
cat <<EOF
Usage: ${0##*/} [--swap-flags|--swap-value] item_name tag value types.xml

--swap-value       swap an item tag's value
--swap-flags       swap an item's flags sub-value



# ================================
# Examples
# ================================

# --------------------------------
# Ex #1: Swapping a value
# --------------------------------

<type name="M4A1">
    <nominal>1</nominal>
</type>

${0##*/} --swap-value M4A1 nominal 2 some_file.xml

# --------------------------------
# Ex #2: Swapping a flags value
# --------------------------------

<type name="M16A2">
    <flags count_in_cargo="0" count_in_hoarder="0" count_in_map="1" count_in_player="0" crafted="0" deloot="0"/>
</type>

${0##*/} --swap-flags M16A2 count_in_player 1 some_file.xml

EOF
exit 1
}

check() {
    if ! command -v xmlstarlet >/dev/null ; then
        die "Please install xmlstarlet"
    fi
}

main() {
    check || die "Failed check"

    if [ "$DEBUG" ] ; then
        echo "ADJUSTING TYPE: $2 $3"
    fi

    case $1 in
        -h|--help)
            usage
            ;;
        -v|--swap-value)
            shift
            swap_value "$1" "$2" "$3" "$4" || exit 1
            ;;
        -f|--swap-flags)
            shift
            swap_flags "$1" "$2" "$3" "$4" || exit 1
            ;;
    esac
}

main "$@"