#!/usr/bin/env python3
"""
Cross-platform build script for EBoek.info Scraper
Creates a standalone executable using PyInstaller
"""

import os
import sys
import subprocess
import shutil
from pathlib import Path


def run_command(command, description):
    """Run a command and handle errors."""
    print(f"→ {description}...")
    try:
        result = subprocess.run(command, shell=True, capture_output=True, text=True)
        if result.returncode != 0:
            print(f"✗ Error: {result.stderr}")
            return False
        if result.stdout.strip():
            print(f"  {result.stdout.strip()}")
        return True
    except Exception as e:
        print(f"✗ Exception: {e}")
        return False


def main():
    """Main build process."""
    print("=" * 50)
    print("🚀 EBoek.info Scraper - Executable Builder")
    print("=" * 50)
    print()

    # Change to project root directory (parent of scripts/)
    script_dir = Path(__file__).parent
    project_root = script_dir.parent
    os.chdir(project_root)
    print(f"📂 Working from: {project_root}")
    print()

    # Check Python version
    if sys.version_info < (3, 8):
        print("✗ Error: Python 3.8+ required")
        sys.exit(1)

    # Check if PyInstaller is installed
    try:
        import PyInstaller
        print(f"✓ PyInstaller {PyInstaller.__version__} found")
    except ImportError:
        print("→ Installing PyInstaller...")
        if not run_command(f"{sys.executable} -m pip install pyinstaller", "Installing PyInstaller"):
            print("✗ Failed to install PyInstaller")
            sys.exit(1)

    # Clean previous builds
    print()
    for directory in ["dist", "build"]:
        if Path(directory).exists():
            shutil.rmtree(directory)
            print(f"✓ Cleaned {directory}/")

    # Determine platform-specific settings
    is_windows = sys.platform.startswith('win')
    exe_name = "EBoek_Scraper.exe" if is_windows else "EBoek_Scraper"
    app_name = "EBoek_Scraper"  # Base name without extension

    # Build command
    build_cmd = [
        f"{sys.executable}", "-m", "PyInstaller",
        "--onefile",
        "--windowed",
        "--name", app_name,
        # Hidden imports for PyQt5
        "--hidden-import", "PyQt5.QtCore",
        "--hidden-import", "PyQt5.QtGui",
        "--hidden-import", "PyQt5.QtWidgets",
        # Hidden imports for Selenium
        "--hidden-import", "selenium",
        "--hidden-import", "selenium.webdriver",
        "--hidden-import", "selenium.webdriver.chrome",
        "--hidden-import", "selenium.webdriver.chrome.options",
        "--hidden-import", "selenium.webdriver.common.by",
        # Hidden imports for our modules
        "--hidden-import", "core.scraper",
        "--hidden-import", "core.scraper_thread",
        "--hidden-import", "core.credentials",
        "--hidden-import", "gui.main_window",
        "--hidden-import", "gui.login_dialog",
        "--hidden-import", "gui.progress_dialog",
        "--hidden-import", "utils.validators",
        # Exclude unnecessary modules to reduce size
        "--exclude-module", "tkinter",
        "--exclude-module", "matplotlib",
        "--exclude-module", "numpy",
        "--exclude-module", "pandas",
        # Main script
        "gui_main.py"
    ]

    print()
    print("🔨 Building executable...")
    print("📝 This may take a few minutes...")
    print()

    # Run PyInstaller
    try:
        result = subprocess.run(build_cmd, capture_output=True, text=True)

        if result.returncode != 0:
            print("✗ Build failed!")
            print("Error output:")
            print(result.stderr)

            # Try fallback with spec file
            print()
            print("🔄 Trying alternative build with spec file...")
            spec_cmd = [f"{sys.executable}", "-m", "PyInstaller", "scripts/eboek_scraper.spec"]
            result = subprocess.run(spec_cmd, capture_output=True, text=True)

            if result.returncode != 0:
                print("✗ Alternative build also failed!")
                print(result.stderr)
                sys.exit(1)

        print("✓ Build completed successfully!")

    except Exception as e:
        print(f"✗ Build failed with exception: {e}")
        sys.exit(1)

    # Check if executable was created
    exe_path = Path("dist") / exe_name
    if not exe_path.exists():
        print(f"✗ Error: Executable not found at {exe_path}")
        sys.exit(1)

    # Display results
    file_size = exe_path.stat().st_size / (1024 * 1024)  # MB
    print()
    print("=" * 50)
    print("🎉 BUILD SUCCESSFUL!")
    print("=" * 50)
    print(f"📂 Executable location: {exe_path}")
    print(f"📊 File size: {file_size:.1f} MB")
    print()

    # Platform-specific instructions
    if is_windows:
        print("🪟 Windows Instructions:")
        print(f"   • Run: {exe_path}")
        print("   • Windows may show security warning on first run")
        print("   • Click 'More Info' → 'Run Anyway' if prompted")
    else:
        print("🍎 macOS/Linux Instructions:")
        print(f"   • Run: ./{exe_path}")
        print("   • macOS may show security warning on first run")
        print("   • Right-click and select 'Open' to bypass Gatekeeper")

    print()
    print("📦 Distribution:")
    print(f"   • Share this single file: {exe_name}")
    print("   • No Python installation required on target machine")
    print("   • Includes all dependencies (PyQt5, Selenium, etc.)")
    print()
    print("✨ Ready for distribution!")


if __name__ == "__main__":
    main()