#!/bin/bash

# BBeOS UI Build Script
# Builds UI components and integrates them into the system

set -e

echo "Building BBeOS UI components..."

# Configuration
UI_DIR="src/ui"
BUILD_DIR="build/ui"
ROOTFS_DIR="rootfs"

# Set up environment
export ARCH=arm
export CROSS_COMPILE=arm-linux-gnueabihf-

# Check for required tools
check_dependencies() {
    echo "Checking build dependencies..."
    
    # Check for cross-compiler
    if ! command -v arm-linux-gnueabihf-gcc &> /dev/null; then
        echo "Error: ARM cross-compiler not found"
        echo "Please install: sudo apt-get install gcc-arm-linux-gnueabihf"
        exit 1
    fi
    
    # Check for required libraries (development headers)
    echo "Note: Wayland, wlroots, Cairo, and Pango development libraries are required"
    echo "These will need to be cross-compiled for ARM or installed in the target system"
}

# Create build directory
setup_build() {
    echo "Setting up build directory..."
    rm -rf $BUILD_DIR
    mkdir -p $BUILD_DIR
    
    # Copy UI source to build directory
    cp -r $UI_DIR/. $BUILD_DIR/
}

# Build UI components
build_ui() {
    echo "Building UI components..."
    cd $BUILD_DIR
    
    # Build compositor
    echo "Building Q20 compositor..."
    if [ -f "compositor/q20-compositor.c" ]; then
        # Note: This will fail without wlroots headers, but we'll create a stub
        echo "Creating compositor stub (requires wlroots for full build)..."
        cat > compositor/q20-compositor-stub.c << 'EOF'
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[]) {
    printf("Q20 Compositor (stub)\n");
    printf("This is a placeholder for the Wayland compositor\n");
    printf("Full implementation requires wlroots library\n");
    return 0;
}
EOF
        arm-linux-gnueabihf-gcc -o compositor/q20-compositor compositor/q20-compositor-stub.c
    else
        echo "Warning: Compositor source not found"
    fi
    
    # Build home screen application
    echo "Building home screen application..."
    if [ -f "applications/home-screen.c" ]; then
        # Note: This will fail without Cairo headers, but we'll create a stub
        echo "Creating home screen stub (requires Cairo for full build)..."
        cat > applications/home-screen-stub.c << 'EOF'
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[]) {
    printf("Q20 Home Screen (stub)\n");
    printf("This is a placeholder for the home screen application\n");
    printf("Full implementation requires Cairo and Wayland libraries\n");
    return 0;
}
EOF
        arm-linux-gnueabihf-gcc -o applications/home-screen applications/home-screen-stub.c
    else
        echo "Warning: Home screen source not found"
    fi
    
    cd ..
}

# Create UI assets
create_assets() {
    echo "Creating UI assets..."
    mkdir -p $BUILD_DIR/assets
    
    # Create basic theme configuration
    cat > $BUILD_DIR/assets/theme.conf << 'EOF'
# BBeOS Theme Configuration
# BlackBerry Classic Q20 UI Theme

[colors]
background=#1a1a1a
foreground=#ffffff
accent=#0066cc
highlight=#3399ff
error=#cc3333
success=#33cc33
warning=#cc9933

[fonts]
default=Sans 12
title=Sans Bold 16
status=Sans 10
help=Sans 9

[layout]
status_bar_height=40
app_grid_size=4
app_icon_size=80
app_icon_spacing=20
EOF

    # Create default wallpaper (simple pattern)
    cat > $BUILD_DIR/assets/wallpaper.svg << 'EOF'
<?xml version="1.0" encoding="UTF-8"?>
<svg width="720" height="720" xmlns="http://www.w3.org/2000/svg">
  <defs>
    <pattern id="grid" width="20" height="20" patternUnits="userSpaceOnUse">
      <path d="M 20 0 L 0 0 0 20" fill="none" stroke="#333333" stroke-width="1"/>
    </pattern>
  </defs>
  <rect width="720" height="720" fill="#1a1a1a"/>
  <rect width="720" height="720" fill="url(#grid)"/>
</svg>
EOF

    echo "UI assets created"
}

# Install to rootfs
install_to_rootfs() {
    echo "Installing UI components to rootfs..."
    
    if [ ! -d "$ROOTFS_DIR" ]; then
        echo "Creating rootfs directory..."
        mkdir -p $ROOTFS_DIR
    fi
    
    # Create directory structure
    mkdir -p $ROOTFS_DIR/usr/bin
    mkdir -p $ROOTFS_DIR/usr/share/bbeos/ui
    mkdir -p $ROOTFS_DIR/etc/bbeos
    
    # Install binaries
    if [ -f "$BUILD_DIR/compositor/q20-compositor" ]; then
        cp $BUILD_DIR/compositor/q20-compositor $ROOTFS_DIR/usr/bin/
        chmod +x $ROOTFS_DIR/usr/bin/q20-compositor
    fi
    
    if [ -f "$BUILD_DIR/applications/home-screen" ]; then
        cp $BUILD_DIR/applications/home-screen $ROOTFS_DIR/usr/bin/
        chmod +x $ROOTFS_DIR/usr/bin/home-screen
    fi
    
    # Install assets
    if [ -d "$BUILD_DIR/assets" ]; then
        cp -r $BUILD_DIR/assets/* $ROOTFS_DIR/usr/share/bbeos/ui/
    fi
    
    # Create UI startup script
    cat > $ROOTFS_DIR/usr/bin/start-ui << 'EOF'
#!/bin/sh

# BBeOS UI Startup Script
# Starts the Q20 compositor and home screen

echo "Starting BBeOS UI..."

# Set up environment
export WAYLAND_DISPLAY=wayland-0
export XDG_RUNTIME_DIR=/tmp/runtime-root

# Create runtime directory
mkdir -p $XDG_RUNTIME_DIR
chmod 700 $XDG_RUNTIME_DIR

# Start compositor in background
echo "Starting Q20 compositor..."
q20-compositor &
COMPOSITOR_PID=$!

# Wait for compositor to start
sleep 2

# Start home screen
echo "Starting home screen..."
home-screen

# Cleanup
kill $COMPOSITOR_PID 2>/dev/null || true
echo "UI stopped"
EOF
    chmod +x $ROOTFS_DIR/usr/bin/start-ui
    
    echo "UI components installed to rootfs"
}

# Main build process
main() {
    echo "=== BBeOS UI Build Process ==="
    
    check_dependencies
    setup_build
    build_ui
    create_assets
    install_to_rootfs
    
    echo ""
    echo "=== UI Build Complete ==="
    echo "Generated files:"
    echo "  - $BUILD_DIR/compositor/q20-compositor (stub)"
    echo "  - $BUILD_DIR/applications/home-screen (stub)"
    echo "  - $BUILD_DIR/assets/ (theme and assets)"
    echo "  - $ROOTFS_DIR/usr/bin/start-ui (startup script)"
    echo ""
    echo "Note: These are stub implementations."
    echo "Full functionality requires:"
    echo "  - wlroots library (for compositor)"
    echo "  - Cairo and Pango libraries (for applications)"
    echo "  - Wayland development libraries"
    echo ""
    echo "To test on target hardware:"
    echo "  ./scripts/flash-boot.sh"
    echo "  Then run: start-ui"
}

# Run main function
main "$@"