#!/usr/bin/env bash

set -e # kill if it fails

# Path to processing.h
PROCESSING_H_PATH="/home/kof/src/RaylibProcessing/processing.h"

if [ -z "$1" ]; then
  TARGET=`pwd`
else
  TARGET=$(realpath "$1")
fi

if [ -d "$TARGET" ]; then
  SKETCH_DIR="$TARGET"
  SKETCH_NAME=$(basename "$SKETCH_DIR")
  MAIN_PDE="$SKETCH_DIR/$SKETCH_NAME.pde"
elif [ -f "$TARGET" ] && [ "${TARGET##*.}" = "pde" ]; then
  MAIN_PDE="$TARGET"
  SKETCH_DIR=$(dirname "$MAIN_PDE")
  SKETCH_NAME=$(basename "$SKETCH_DIR")
else
  echo "Error: Invalid target, it has to be sketch folder of .pde file."
  exit 1
fi

if [ ! -f "$MAIN_PDE" ]; then
  echo "Error: Main sketch file should be in the folder of the same name!"
  echo "Expected: $SKETCH_DIR/$(basename "$SKETCH_DIR").pde"
  exit 1
fi

BUILD_DIR=$(mktemp -d -t pde-build.XXXXXX)

trap 'rm -rf "$BUILD_DIR"' EXIT

COMBINED_PDE="$BUILD_DIR/combined.pde"
OUTPUT_C="$BUILD_DIR/sketch.c"
BINARY="$BUILD_DIR/$SKETCH_NAME"

echo "Concating sketch: $SKETCH_NAME"

cat "$MAIN_PDE" > "$COMBINED_PDE"
echo "" >> "$COMBINED_PDE" # Prevence, pokud chybí newline na konci souboru

for f in "$SKETCH_DIR"/*.pde; do
  if [ -f "$f" ] && [ "$f" != "$MAIN_PDE" ]; then
    echo "// --- Tab: $(basename "$f") ---" >> "$COMBINED_PDE"
    cat "$f" >> "$COMBINED_PDE"
    echo "" >> "$COMBINED_PDE"
  fi
done

# HTML COLOR MASHING
# Přepíše mřížku (#ffcc00) na čistý C hex formát (0xffcc00) přímo v combined.pde
sed -i -E 's/#([0-9a-fA-F]{6})/HEX_COLOR_\1/g' "$COMBINED_PDE"

# Kopírování headeru do build adresáře
cp "$PROCESSING_H_PATH" "$BUILD_DIR/processing.h"
HEADER_ROOT=$(dirname "$PROCESSING_H_PATH")
cp "$HEADER_ROOT/terminus.ttf" "$BUILD_DIR/terminus.ttf"

if ! pde2c "$COMBINED_PDE" > "$OUTPUT_C"; then
  echo "Error: Transpil failed!"
  exit 1
fi

# HTML COLOR MASHING - Fáze 2: Překlopíme bezpečný název na čistý C hex literál pro GCC
# Z HEX_COLOR_ffcc11 se v hotovém sketch.c stane 0xffcc11
sed -i -E 's/HEX_COLOR_([0-9a-fA-F]{6})/0x\1/g' "$OUTPUT_C"

echo "Compiling in $BUILD_DIR..."
gcc "$OUTPUT_C" -o "$BINARY" -O2 -lraylib -lGL -lm -lpthread -ldl -lrt -lX11

echo "Running..."
(cd "$SKETCH_DIR" && "$BINARY")