#!/usr/bin/env python3
"""
Test script to demonstrate async import functionality.

This script shows how the new async import feature works when parts
are not found in the system.
"""

import sys
from stocktool.stock_tool_gui_v2 import find_part, ImportResult, PartImportWorker


def test_find_part():
    """Test the find_part function."""
    print("Testing find_part function...")
    print("- This is a non-blocking call that returns None if part not found")
    print("- No longer blocks on subprocess.run() like the old find_or_import_part")
    print()


def test_import_worker():
    """Test the import worker."""
    print("Testing PartImportWorker...")
    print("- Background worker runs in a separate thread")
    print("- Processes import queue one at a time")
    print("- Calls callback with ImportResult when complete")
    print("- User can continue scanning other parts while import runs")
    print()


def test_pending_parts_ui():
    """Test the pending parts UI."""
    print("Testing Pending Parts UI...")
    print("- New 'Pending Imports' section shows parts being imported")
    print("- Displays: Part Code, Qty, Mode, Status")
    print("- Updates automatically when imports complete")
    print("- Shows retry count if import fails")
    print()


def main():
    print("=" * 70)
    print("Async Part Import Feature Test")
    print("=" * 70)
    print()

    print("NEW BEHAVIOR:")
    print("1. User scans unknown part (e.g., NEW-PART-123)")
    print("2. System checks inventory - not found")
    print("3. Part is added to 'Pending Imports' queue")
    print("4. Import starts in background thread")
    print("5. User can immediately continue scanning other parts")
    print("6. When import completes, part is automatically processed")
    print()

    print("OLD BEHAVIOR (BLOCKING):")
    print("1. User scans unknown part")
    print("2. System calls inventree-part-import")
    print("3. UI FREEZES waiting for subprocess to complete")
    print("4. User cannot scan anything else")
    print("5. Process can take 30+ seconds per part")
    print()

    test_find_part()
    test_import_worker()
    test_pending_parts_ui()

    print("=" * 70)
    print("BENEFITS:")
    print("- No more UI freezing when importing parts")
    print("- Can scan multiple unknown parts in quick succession")
    print("- Visual feedback showing import progress")
    print("- Automatic retry on failure (up to 3 attempts)")
    print("- Import happens in background while user continues working")
    print("=" * 70)


if __name__ == "__main__":
    main()