#!/bin/bash

# Usage: ./setboss.sh <boss_name> <n>
# This script modifies invaders' source code so that
# the boss depicted in boss_name.dat be the boss for the n-th level
# WHAT'S ACTUALLY DONE: (using command line setboss myboss.dat 2)
# in file "definitions.hpp", line
# #define BOSS_FILE2 "palombo"
# becomes
# #define BOSS_FILE2 "myboss"


# Just to be on the safe side, the script also creates a backup copy
# of definitions.hpp called definitions.hpp.bu

MAX_LVL=3
MIN_LVL=1

if [ $# -ne 2 ]; then
	echo Usage: $0 \<bossname\> \(must be a .dat, but DON\'T specify the extension when passing it\) \<level\>
	echo Now leaving
	exit 1
fi

NEW_BOSS_NAME=$1
NEW_BOSS_FILE="$NEW_BOSS_NAME.dat"
if [ ! -e $NEW_BOSS_FILE -o ! -f $NEW_BOSS_FILE ]; then
	echo Could not find specified file $1
	echo Now leaving
	exit 2
elif [[ ! "$NEW_BOSS_FILE" =~ dat$  ]]; then
	echo This does not look like a text file
	echo Now leaving
	exit 3
fi

LEVEL=$2
# This works too for some reason
# if ! [ $2 -eq $2 ] &> /dev/null; then
# 	echo Second argument $2 should be numeric!
# 	echo Now leaving
# 	exit 4
# fi
if [ $LEVEL -eq $LEVEL ] &> /dev/null; then
	if [ $LEVEL -lt $MIN_LVL ]; then
		LEVEL=$MIN_LVL
	elif [ $LEVEL -gt $MAX_LVL ]; then
		LEVEL=$MAX_LVL
	fi
else
	echo Second argument should be numeric!
	echo Now leaving
	exit 4
fi


./checkboss.sh $NEW_BOSS_FILE

# Everything has been checked, file exists and has .dat extension, second argument is an integer
# with value between $MIN_LVL and $MAX_LVL
# Now for the easy part:

cp definitions.hpp definitions.hpp.bu
sed s/"BOSS_FILE$LEVEL \".*\""/"BOSS_FILE$LEVEL \"$NEW_BOSS_NAME\""/ definitions.hpp > outputsed.tmp
mv outputsed.tmp definitions.hpp
echo "boss lv $LEVEL  successfully set."