#!/bin/sh

directory="build/bin"
if [ ! -d "$directory" ]; then
    mkdir -p $directory
fi

echo "Compiling mbr..."
nasm -I boot/include/ -o $directory/mbr.bin boot/mbr.S
if [ $? -eq 0 ]; then
    echo "MBR compiled successfully."
else
    echo "MBR compiled failed."
    exit
fi
echo "Compiling loader..."
nasm -I boot/include/ -o $directory/loader.bin boot/loader.S
if [ $? -eq 0 ]; then
    echo "Bootloader compiled successfully."
else
    echo "Bootloader compiled failed."
    exit
fi
echo "Compiling kernel..."
directory="build"
if [ ! -d "$directory" ]; then
    mkdir $directory
fi
i386-elf-gcc -I lib/ -I lib/kernel/ -c -fno-builtin -o build/timer.o device/timer.c
i386-elf-gcc -I ./lib/ -I lib/kernel/ -I kernel/ -c -fno-builtin -o build/main.o kernel/main.c
nasm -f elf -o build/print.o lib/kernel/print.S
nasm -f elf -o build/kernel.o kernel/kernel.S

i386-elf-gcc -I lib/kernel/ -I ./lib/ -I kernel/ -c -fno-builtin -o build/interrupt.o kernel/interrupt.c
i386-elf-gcc -I lib/kernel/ -I ./lib/ -I kernel/ -c -fno-builtin -o build/init.o kernel/init.c

directory="build/bin"
if [ ! -d "$directory" ]; then
    mkdir $directory
fi
i386-elf-ld -Ttext 0xc0001500 -e main -o $directory/kernel.bin build/main.o build/init.o build/interrupt.o build/print.o build/kernel.o build/timer.o

if [ $? -eq 0 ]; then
    echo "Kernel compiled successfully."
else
    echo "Kernel compiled failed."
    exit
fi

echo "Creating disk image..."
bximage -q -func=create -hd=30M hd30M.img
if [ $? -eq 0 ]; then
    echo "Disk image created successfully."
else
    echo "Disk image created failed."
    exit
fi

echo "Installing to disk image..."
echo " 0. Writing mbr to disk..."
dd if=$directory/mbr.bin of=hd30M.img bs=512 count=1 conv=notrunc
if [ $? -eq 0 ]; then
    echo "Install mbr to disk image successfully."
else
    echo "Install mbr to disk image failed."
    exit
fi
echo " 1. Writing loader to disk..."
dd if=$directory/loader.bin of=hd30M.img bs=512 count=4 seek=2 conv=notrunc
if [ $? -eq 0 ]; then
    echo "Install loader to disk image successfully."
else
    echo "Install loader to disk image failed."
    exit
fi
echo " 2. Writing kernel to disk..."
dd if=$directory/kernel.bin of=hd30M.img bs=512 count=200 seek=9 conv=notrunc

if [ $? -eq 0 ]; then
    echo "Install kernel to disk image successfully."
else
    echo "Install kernel to disk image failed."
    exit
fi

echo "Now starting bochs ..."
bochs -f bochsrc -q