#!/bin/bash
# DragonX ImGui Wallet - AppImage Creation Script
# Copyright 2024-2026 The Hush Developers
# Released under the GPLv3

set -e

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
BUILD_DIR="${SCRIPT_DIR}/build/linux"
APPDIR="${BUILD_DIR}/AppDir"
VERSION="1.2.0"

# Colors
GREEN='\033[0;32m'
RED='\033[0;31m'
NC='\033[0m'

print_status() { echo -e "${GREEN}[*]${NC} $1"; }
print_error() { echo -e "${RED}[ERROR]${NC} $1"; }

# Check prerequisites
if [ ! -f "${BUILD_DIR}/bin/ObsidianDragon" ]; then
    print_error "Binary not found. Run build.sh --linux-release first."
    exit 1
fi

# Check for appimagetool — pinned to a tagged release and SHA-256 verified before we exec it.
# The old "continuous" tag is a moving, unverified network download that runs on the release
# builder; verify it or refuse to package.
APPIMAGETOOL_URL="https://github.com/AppImage/appimagetool/releases/download/1.9.0/appimagetool-x86_64.AppImage"
APPIMAGETOOL_SHA256="46fdd785094c7f6e545b61afcfb0f3d98d8eab243f644b4b17698c01d06083d1"
APPIMAGETOOL=""
if command -v appimagetool &> /dev/null; then
    APPIMAGETOOL="appimagetool"   # maintainer's own trusted system install
else
    AT="${BUILD_DIR}/appimagetool-x86_64.AppImage"
    if [ ! -f "$AT" ] || ! echo "${APPIMAGETOOL_SHA256}  ${AT}" | sha256sum -c --status; then
        print_status "Downloading appimagetool 1.9.0 (pinned)..."
        wget -q -O "$AT" "$APPIMAGETOOL_URL"
        if ! echo "${APPIMAGETOOL_SHA256}  ${AT}" | sha256sum -c --status; then
            print_error "appimagetool SHA-256 verification failed — refusing to use it"
            rm -f "$AT"
            exit 1
        fi
        chmod +x "$AT"
    fi
    APPIMAGETOOL="$AT"
fi

print_status "Creating AppDir structure..."
rm -rf "${APPDIR}"
mkdir -p "${APPDIR}/usr/bin"
mkdir -p "${APPDIR}/usr/lib"
mkdir -p "${APPDIR}/usr/share/applications"
mkdir -p "${APPDIR}/usr/share/icons/hicolor/256x256/apps"
mkdir -p "${APPDIR}/usr/share/ObsidianDragon/res"

# Copy binary
print_status "Copying binary..."
cp "${BUILD_DIR}/bin/ObsidianDragon" "${APPDIR}/usr/bin/"

# Copy resources
print_status "Copying resources..."
cp -r "${BUILD_DIR}/bin/res/"* "${APPDIR}/usr/share/ObsidianDragon/res/" 2>/dev/null || true

# Create desktop file
print_status "Creating desktop file..."
cat > "${APPDIR}/usr/share/applications/ObsidianDragon.desktop" << EOF
[Desktop Entry]
Type=Application
Name=DragonX Wallet
Comment=DragonX Cryptocurrency Wallet
Exec=ObsidianDragon
Icon=ObsidianDragon
Categories=Finance;Network;
Terminal=false
StartupNotify=true
EOF

# Copy desktop file to root
cp "${APPDIR}/usr/share/applications/ObsidianDragon.desktop" "${APPDIR}/"

# Create icon (simple SVG placeholder if no icon exists)
print_status "Creating icon..."
if [ -f "${SCRIPT_DIR}/res/icons/dragonx-256.png" ]; then
    cp "${SCRIPT_DIR}/res/icons/dragonx-256.png" "${APPDIR}/usr/share/icons/hicolor/256x256/apps/ObsidianDragon.png"
else
    # Create a simple SVG icon as placeholder
    cat > "${APPDIR}/ObsidianDragon.svg" << 'EOF'
<?xml version="1.0" encoding="UTF-8"?>
<svg width="256" height="256" viewBox="0 0 256 256" xmlns="http://www.w3.org/2000/svg">
  <rect width="256" height="256" rx="32" fill="#1a1a1a"/>
  <circle cx="128" cy="128" r="80" fill="none" stroke="#2e7d32" stroke-width="8"/>
  <text x="128" y="145" font-family="Arial, sans-serif" font-size="72" font-weight="bold" 
        fill="#4caf50" text-anchor="middle">DX</text>
</svg>
EOF
    # Convert SVG to PNG if rsvg-convert is available
    if command -v rsvg-convert &> /dev/null; then
        rsvg-convert -w 256 -h 256 "${APPDIR}/ObsidianDragon.svg" > \
            "${APPDIR}/usr/share/icons/hicolor/256x256/apps/ObsidianDragon.png"
    fi
fi

# Copy icon to root
cp "${APPDIR}/usr/share/icons/hicolor/256x256/apps/ObsidianDragon.png" "${APPDIR}/" 2>/dev/null || \
    cp "${APPDIR}/ObsidianDragon.svg" "${APPDIR}/ObsidianDragon.png" 2>/dev/null || true

# Create AppRun script
print_status "Creating AppRun..."
cat > "${APPDIR}/AppRun" << 'EOF'
#!/bin/bash
SELF=$(readlink -f "$0")
HERE=${SELF%/*}

# Set up resource paths
export DRAGONX_RES_PATH="${HERE}/usr/share/ObsidianDragon/res"

# Find libraries
export LD_LIBRARY_PATH="${HERE}/usr/lib:${LD_LIBRARY_PATH}"

# Change to resource directory for relative paths
cd "${HERE}/usr/share/ObsidianDragon"

exec "${HERE}/usr/bin/ObsidianDragon" "$@"
EOF
chmod +x "${APPDIR}/AppRun"

# Bundle required libraries (basic set)
print_status "Bundling libraries..."
LIBS_TO_BUNDLE=(
    "libSDL3.so"
)

for lib in "${LIBS_TO_BUNDLE[@]}"; do
    LIB_PATH=$(ldconfig -p | grep "$lib" | head -1 | awk '{print $NF}')
    if [ -n "$LIB_PATH" ] && [ -f "$LIB_PATH" ]; then
        cp "$LIB_PATH" "${APPDIR}/usr/lib/" 2>/dev/null || true
    fi
done

# Also copy SDL3 from build if exists
if [ -f "${BUILD_DIR}/_deps/sdl3-build/libSDL3.so" ]; then
    cp "${BUILD_DIR}/_deps/sdl3-build/libSDL3.so"* "${APPDIR}/usr/lib/" 2>/dev/null || true
fi

# Create AppImage
print_status "Creating AppImage..."
cd "${BUILD_DIR}"

ARCH=$(uname -m)
APPIMAGE_NAME="DragonX_Wallet-${VERSION}-${ARCH}.AppImage"

# Run appimagetool
ARCH="${ARCH}" "${APPIMAGETOOL}" "${APPDIR}" "${APPIMAGE_NAME}"

if [ -f "${APPIMAGE_NAME}" ]; then
    # Copy to release/linux/ for clean output
    OUT_DIR="${SCRIPT_DIR}/release/linux"
    mkdir -p "${OUT_DIR}"
    cp "${APPIMAGE_NAME}" "${OUT_DIR}/"
    print_status "AppImage created successfully!"
    print_status "Output: ${OUT_DIR}/${APPIMAGE_NAME}"
    ls -lh "${OUT_DIR}/${APPIMAGE_NAME}"
else
    print_error "AppImage creation failed"
    exit 1
fi
