"""
Stock Screener Launcher
=======================
Startup sequence:
  1. Generate HWID
  2. Load stored license key — show activation dialog if none found
  3. Verify license against Supabase (with 30-min offline grace period)
  4. Silently check for and apply updates
  5. Launch the bundled screener_gui
"""

import os
import sys
import tkinter as tk
from tkinter import messagebox

# Add dist/ to path so screener_gui and stock_screener are importable
sys.path.insert(0, os.path.join(os.path.dirname(os.path.abspath(__file__)), "dist"))

# Fix SSL certificate path for PyInstaller frozen builds.
# Without this, requests raises "Could not find a suitable TLS CA certificate bundle".
if getattr(sys, "frozen", False):
    import certifi
    os.environ["REQUESTS_CA_BUNDLE"] = certifi.where()
    os.environ["SSL_CERT_FILE"]      = certifi.where()


# ---------------------------------------------------------------------------
# Helpers
# ---------------------------------------------------------------------------

def _fatal(title: str, message: str) -> None:
    """Show an error dialog and exit."""
    root = tk.Tk()
    root.withdraw()
    messagebox.showerror(title, message)
    root.destroy()
    sys.exit(1)


# ---------------------------------------------------------------------------
# Main
# ---------------------------------------------------------------------------

def main():
    # ------------------------------------------------------------------
    # Step 1: HWID
    # ------------------------------------------------------------------
    try:
        from hwid import get_hwid
        hwid = get_hwid()
    except Exception as exc:
        _fatal("Ultimate Investment Tool", f"Could not generate hardware ID:\n\n{exc}")
        return

    # ------------------------------------------------------------------
    # Step 2: Load or activate license
    # ------------------------------------------------------------------
    import license_check

    license_key = license_check.load_license_key(hwid)

    if license_key is None:
        import activation_dialog
        activated = activation_dialog.run_activation(hwid)
        if not activated:
            sys.exit(0)
        license_key = license_check.load_license_key(hwid)
        if license_key is None:
            _fatal("Ultimate Investment Tool", "Activation failed. Please restart and try again.")
            return

    # ------------------------------------------------------------------
    # Step 3: Verify license on every launch
    # ------------------------------------------------------------------
    valid, reason = license_check.verify_license(license_key, hwid)

    if not valid:
        license_check.delete_license_key()
        _fatal(
            "Ultimate Investment Tool — License Error",
            f"{reason}\n\nThe application will now close."
        )
        return

    # ------------------------------------------------------------------
    # Step 4: Silent update check
    # ------------------------------------------------------------------
    try:
        import updater
        updater.check_and_apply_update()
    except Exception:
        pass

    # ------------------------------------------------------------------
    # Step 5: Launch bundled app
    # ------------------------------------------------------------------
    try:
        import screener_gui
        screener_gui.main()
    except Exception:
        import traceback
        _fatal(
            "Ultimate Investment Tool — Startup Error",
            f"The application failed to start:\n\n{traceback.format_exc()}"
        )


if __name__ == "__main__":
    main()