#!/bin/bash

echo "==============================================="
echo " EBoek.info Scraper - Installation and Setup"
echo "==============================================="
echo

# Function to check if command exists
command_exists() {
    command -v "$1" >/dev/null 2>&1
}

# Check operating system
OS="$(uname -s)"
case "${OS}" in
    Linux*)     MACHINE=Linux;;
    Darwin*)    MACHINE=Mac;;
    *)          MACHINE="UNKNOWN:${OS}"
esac

echo "Operating System: $MACHINE"

# Check if Python is installed
if command_exists python3; then
    PYTHON_CMD="python3"
elif command_exists python; then
    PYTHON_VERSION=$(python --version 2>&1 | grep -oP '\d+\.\d+')
    if [[ ${PYTHON_VERSION%.*} -ge 3 ]]; then
        PYTHON_CMD="python"
    else
        echo "ERROR: Python 3 is required. Found Python $PYTHON_VERSION"
        PYTHON_CMD=""
    fi
else
    PYTHON_CMD=""
fi

if [ -z "$PYTHON_CMD" ]; then
    echo "Python 3 is not installed."
    echo
    if [ "$MACHINE" = "Mac" ]; then
        echo "To install Python on macOS:"
        echo "1. Install Homebrew: /bin/bash -c \"\$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)\""
        echo "2. Install Python: brew install python"
        echo "   OR download from: https://www.python.org/downloads/"
    elif [ "$MACHINE" = "Linux" ]; then
        echo "To install Python on Linux:"
        echo "Ubuntu/Debian: sudo apt update && sudo apt install python3 python3-pip"
        echo "CentOS/RHEL: sudo yum install python3 python3-pip"
        echo "Fedora: sudo dnf install python3 python3-pip"
    fi
    echo
    echo "After installing Python, run this script again."
    exit 1
fi

echo "Python found: $($PYTHON_CMD --version)"

# Check if pip is available
if ! $PYTHON_CMD -m pip --version >/dev/null 2>&1; then
    echo "pip is not available. Installing pip..."
    if [ "$MACHINE" = "Mac" ]; then
        curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
        $PYTHON_CMD get-pip.py
        rm get-pip.py
    elif [ "$MACHINE" = "Linux" ]; then
        echo "Please install pip using your package manager:"
        echo "Ubuntu/Debian: sudo apt install python3-pip"
        echo "CentOS/RHEL: sudo yum install python3-pip"
        exit 1
    fi
fi

# Check if GUI is already set up
if [ -f "../gui_main.py" ]; then
    echo "GUI application already set up."
    echo
else
    echo
    echo "Installing required packages..."
    echo "==============================================="

    # Upgrade pip first
    $PYTHON_CMD -m pip install --upgrade pip

    # Install requirements
    if ! $PYTHON_CMD -m pip install -r requirements.txt; then
        echo
        echo "ERROR: Failed to install requirements."
        echo "Please check your internet connection and try again."
        echo "You may need to install additional system dependencies."

        if [ "$MACHINE" = "Mac" ]; then
            echo
            echo "On macOS, you might need to install Xcode command line tools:"
            echo "xcode-select --install"
        elif [ "$MACHINE" = "Linux" ]; then
            echo
            echo "On Linux, you might need additional packages:"
            echo "Ubuntu/Debian: sudo apt install python3-dev python3-tk"
            echo "CentOS/RHEL: sudo yum install python3-devel tkinter"
        fi
        exit 1
    fi

    echo
    echo "Requirements installed successfully!"
    echo "Setting up GUI application..."
fi

# Check for Chrome browser
if [ "$MACHINE" = "Mac" ]; then
    if [ ! -d "/Applications/Google Chrome.app" ]; then
        echo
        echo "WARNING: Google Chrome not found."
        echo "Please install Chrome from: https://www.google.com/chrome/"
        echo "The scraper requires Chrome to function."
    fi
elif [ "$MACHINE" = "Linux" ]; then
    if ! command_exists google-chrome && ! command_exists chromium-browser; then
        echo
        echo "WARNING: Chrome/Chromium not found."
        echo "Please install Chrome or Chromium:"
        echo "Ubuntu/Debian: sudo apt install chromium-browser"
        echo "Or download Chrome from: https://www.google.com/chrome/"
    fi
fi

echo
echo "==============================================="
echo "Installation complete!"
echo "==============================================="

# Run the GUI application
if [ -f "../gui_main.py" ]; then
    echo "Starting EBoek.info Scraper GUI..."
    echo
    if ! $PYTHON_CMD ../gui_main.py; then
        echo
        echo "GUI failed to start. You can still use the terminal version:"
        echo "$PYTHON_CMD main.py"
        echo
    fi
else
    echo "GUI version not found. Running terminal version..."
    echo
    if [ -f "main.py" ]; then
        $PYTHON_CMD main.py
    else
        echo "Error: No scraper found. Please check installation."
        exit 1
    fi
fi

echo
echo "Application closed."
echo "Press Enter to exit..."
read