#!/bin/sh

set -e

if [ -z $MODE ]; then
    MODE='debug'
fi

if [ -z $CC ]; then
    CC='gcc'
fi

# setup dirs
BUILD_DIR=./out
GEN_DIR=$BUILD_DIR/gen
TOOL_SRC=tools/file2header.c
TOOL_EXE=$BUILD_DIR/file2header

# clean cmd
case $1 in
    "clean")
    echo "Deleting $BUILD_DIR"
    rm -rf $BUILD_DIR
    exit 0
esac

# create the build dir if it doesnt exist
if [ -d $BUILD_DIR ]; then
    echo "Building to $BUILD_DIR"
else
    echo "$BUILD_DIR not found, creating"
    mkdir -p $BUILD_DIR
fi

# Ensure gen dir exists
mkdir -p $GEN_DIR

# Check if tool source exists
if [ ! -f $TOOL_SRC ]; then
    echo "Error: $TOOL_SRC not found!"
    exit 1
fi

# Compile tool if exe missing or source changed
if [ ! -f $TOOL_EXE ] || [ $TOOL_SRC -nt $TOOL_EXE ]; then
    echo "Compiling file2header tool..."
    $CC $TOOL_SRC -o $TOOL_EXE
fi

if [ -d "arch" ]; then
    for file in arch/*.c; do
        name=$(basename "$file" .c)
        out_header="$GEN_DIR/${name}.h"
        
        if [ ! -f "$out_header" ] || [ "$file" -nt "$out_header" ]; then
            echo "Packing $file -> $out_header"
            $TOOL_EXE "$file" > "$out_header"
        fi
    done
else
    echo "Warning: 'arch' directory not found."
fi

# setup the build flags based on the build mode
case $MODE in
    "debug")
    BUILD_FLAGS="-g -Wall -Wextra -Werror -pedantic"
    ;;
    "release")
    BUILD_FLAGS="-O3 -Wall -Wextra -Werror -pedantic"
    ;;
esac

BUILD_CMD="$CC -o $BUILD_DIR/undar main.c -I$GEN_DIR $BUILD_FLAGS"

echo "$BUILD_CMD"
 ${BUILD_CMD}

echo "Finished building to $BUILD_DIR/undar"