#!/bin/bash
#
# Purpose : Download latest VARA HF, FM, Terminal and Winlink Express from winlink.org

BASE_URL="https://downloads.winlink.org"
DOWNLOAD_DIR="/tmp/windowsapps"

mkdir -p "$DOWNLOAD_DIR"

echo "Fetching VARA Products page..."
PAGE=$(curl -s "$BASE_URL/VARA%20Products/")

if [ -z "$PAGE" ]; then
  echo "Error: could not fetch VARA Products page."
  exit 1
fi

# Download and extract a VARA product by pattern
download_vara() {
  local pattern="$1"

  # Match against URL encoded pattern
  local encoded_pattern=$(echo "$pattern" | sed 's| |%20|g')
  ENCODED=$(echo "$PAGE" | grep -oP 'HREF="\K[^"]+' | grep -i "$encoded_pattern")

  if [ -z "$ENCODED" ]; then
    echo "Error: could not find $pattern on page."
    return 1
  fi

  # Decode %20 to spaces for local filename
  FILENAME=$(echo "$ENCODED" | sed 's|.*/||; s|%20| |g')

  # Extract version number
  VERSION=$(echo "$FILENAME" | grep -oP '\d+\.\d+[\.\d]*')

  if [ -z "$VERSION" ]; then
    echo "Error: could not determine version from filename: $FILENAME"
    return 1
  fi

  echo "Found $pattern version: $VERSION"
  echo "Filename: $FILENAME"

  local DOWNLOAD_URL="$BASE_URL$ENCODED"
  local FILEPATH="$DOWNLOAD_DIR/$FILENAME"
  local EXTRACT_DIR="$DOWNLOAD_DIR/$(echo "$pattern" | sed 's| |_|g')"

  echo "Downloading $FILENAME..."
  wget -q "$DOWNLOAD_URL" -O "$FILEPATH"

  if [ $? -ne 0 ]; then
    echo "Error: download of $FILENAME failed."
    return 1
  fi

  echo "Extracting to $EXTRACT_DIR..."
  rm -rf "$EXTRACT_DIR"
  mkdir -p "$EXTRACT_DIR"
  unzip -q "$FILEPATH" -d "$EXTRACT_DIR"

  if [ $? -eq 0 ]; then
    echo "Extracted $pattern version $VERSION to $EXTRACT_DIR"
    rm -f "$FILEPATH"
  else
    echo "Error: extraction of $FILENAME failed."
    return 1
  fi
}

# Download and extract Winlink Express
download_winlink() {
  local page
  page=$(curl -s "https://downloads.winlink.org/User%20Programs/")

  if [ -z "$page" ]; then
    echo "Error: could not fetch Winlink User Programs page."
    return 1
  fi

  local encoded
  encoded=$(echo "$page" | grep -oP 'HREF="\K[^"]+' | grep -i "Winlink_Express_install")

  if [ -z "$encoded" ]; then
    echo "Error: could not find Winlink Express install zip on page."
    return 1
  fi

  local filename
  filename=$(echo "$encoded" | sed 's|.*/||; s|%20| |g')

  local version
  version=$(echo "$filename" | grep -oP '\d+[-\.\d]+' | head -n1)

  echo "Found Winlink Express version: $version"
  echo "Filename: $filename"

  local download_url="https://downloads.winlink.org$encoded"
  local filepath="$DOWNLOAD_DIR/$filename"
  local extract_dir="$DOWNLOAD_DIR/Winlink_Express"

  echo "Downloading $filename..."
  wget -q "$download_url" -O "$filepath"

  if [ $? -ne 0 ]; then
    echo "Error: download of $filename failed."
    return 1
  fi

  echo "Extracting to $extract_dir..."
  rm -rf "$extract_dir"
  mkdir -p "$extract_dir"
  unzip -q "$filepath" -d "$extract_dir"

  if [ $? -eq 0 ]; then
    echo "Extracted Winlink Express version $version to $extract_dir"
    rm -f "$filepath"
  else
    echo "Error: extraction of $filename failed."
    return 1
  fi
}

# Install a VARA product using Wine
install_vara() {
  local pattern="$1"
  local wine_dir="$2"
  local extract_dir="$DOWNLOAD_DIR/$(echo "$pattern" | sed 's| |_|g')"

  # Check if already installed
  if [ -d "$wine_dir" ]; then
    echo "  $pattern is already installed, skipping."
    return 0
  fi

  if [ ! -d "$extract_dir" ]; then
    echo "Error: directory $extract_dir not found, skipping."
    return 1
  fi

  # Find the VARA exe file in the extracted directory
  local exe
  exe=$(find "$extract_dir" -maxdepth 1 -iname "VARA*.exe" | head -n1)

  if [ -z "$exe" ]; then
    echo "Error: no VARA*.exe found in $extract_dir, skipping."
    return 1
  fi

  local exe_name=$(basename "$exe")
  echo ""
  echo "=== Installing $exe_name ==="
  echo "Please complete the installation in the Wine window."
  echo "The script will continue once the installer is closed."
  echo ""

  wine "$exe"

  echo "$exe_name installation complete."
}

# Install Winlink Express using Wine
install_winlink() {
  local wine_dir="$HOME/.wine/drive_c/RMS Express"
  local extract_dir="$DOWNLOAD_DIR/Winlink_Express"

  # Check if already installed
  if [ -d "$wine_dir" ]; then
    echo "  Winlink Express is already installed, skipping."
    return 0
  fi

  if [ ! -d "$extract_dir" ]; then
    echo "Error: directory $extract_dir not found, skipping."
    return 1
  fi

  local exe
  exe=$(find "$extract_dir" -maxdepth 1 -iname "Winlink_Express_install*.exe" | head -n1)

  if [ -z "$exe" ]; then
    echo "Error: no Winlink Express exe found in $extract_dir, skipping."
    return 1
  fi

  local exe_name=$(basename "$exe")
  echo ""
  echo "=== Installing $exe_name ==="
  echo "Please complete the installation in the Wine window."
  echo "The script will continue once the installer is closed."
  echo ""

  wine "$exe"

  echo "$exe_name installation complete."
}

# Download all products
download_vara "VARA HF"
download_vara "VARA FM"
download_vara "VARA Terminal"
download_winlink

# Initialize Wine if not already done
if [ ! -d "$HOME/.wine" ]; then
  echo "Initializing Wine..."
  wineboot --init
  echo "Wine initialized."
fi

# Update Wine registry to disable window decorations
USER_REG="$HOME/.wine/user.reg"

if [ ! -f "$USER_REG" ]; then
  echo "Warning: $USER_REG not found, skipping registry update."
else
  echo "Updating Wine registry..."
  if grep -q '"Decorated"="Y"' "$USER_REG"; then
    sed -i 's/"Decorated"="Y"/"Decorated"="N"/' "$USER_REG"
  elif grep -q '"Decorated"' "$USER_REG"; then
    sed -i 's/"Decorated"=.*/"Decorated"="N"/' "$USER_REG"
  else
    echo '"Decorated"="N"' >> "$USER_REG"
  fi
  echo "Set Decorated=N in $USER_REG"
fi

echo ""
echo "All products downloaded and extracted to $DOWNLOAD_DIR"

# Install Wine dependencies
echo ""
echo "Installing Wine dependencies..."
winetricks -q vb6run pdh_nt4 sound=alsa

if [ $? -ne 0 ]; then
  echo "Error: winetricks failed, aborting."
  exit 1
fi

echo "Wine dependencies installed successfully."

# Install all products
echo ""
echo "Starting installations..."

install_vara "VARA HF"       "$HOME/.wine/drive_c/VARA"
install_vara "VARA FM"       "$HOME/.wine/drive_c/VARA FM"
install_vara "VARA Terminal" "$HOME/.wine/drive_c/VARA"
install_winlink

echo ""
echo "Updating desktop database..."
update-desktop-database "$HOME/.local/share/applications/"

echo ""
echo "All installations complete."