#!/usr/bin/env python3
"""
Simple Accelerometer Demo - Using Unified Event API

This is a simplified version of the accelerometer demo that uses
the HAL's get_event() convenience method to poll both touch and
accelerometer in a single call.

Usage:
    python examples/demo_accelerometer_simple.py <epub_file>
"""

import asyncio
import sys
from pathlib import Path

# Add parent directory to path for imports
sys.path.insert(0, str(Path(__file__).parent.parent))

from dreader.hal_hardware import HardwareDisplayHAL
from dreader.application import EbookReader
from dreader.gesture import GestureType


async def main():
    """Simple demo using unified event API"""
    if len(sys.argv) < 2:
        print("Usage: python demo_accelerometer_simple.py <epub_file>")
        sys.exit(1)

    epub_path = sys.argv[1]

    # Create HAL with accelerometer enabled
    print("Initializing hardware...")
    hal = HardwareDisplayHAL(
        width=1872,
        height=1404,
        enable_orientation=True
    )

    await hal.initialize()

    # Load accelerometer calibration (optional)
    if hal.load_accelerometer_calibration("accelerometer_config.json"):
        print("✓ Accelerometer calibrated - tilt gestures enabled")
    else:
        print("✗ No accelerometer calibration - touch only")

    # Create reader and load book
    print(f"\nLoading: {epub_path}")
    reader = EbookReader(page_size=(hal.width, hal.height), margin=60)

    if not reader.load_epub(epub_path):
        print(f"ERROR: Failed to load {epub_path}")
        await hal.cleanup()
        return

    print(f"Loaded: {reader.book_title}")

    # Display first page
    img = reader.get_current_page()
    await hal.show_image(img)

    print("\nControls:")
    print("  Swipe LEFT or Tilt FORWARD → Next page")
    print("  Swipe RIGHT or Tilt BACKWARD → Previous page")
    print("  Long press → Exit\n")

    # Main event loop - simple unified API!
    running = True
    while running:
        # Get event from any source (touch or accelerometer)
        event = await hal.get_event()

        if event:
            print(f"Gesture: {event.gesture.value}")

            # Page navigation
            if event.gesture in [GestureType.SWIPE_LEFT, GestureType.TILT_FORWARD]:
                img = reader.next_page()
                if img:
                    progress = reader.get_reading_progress()
                    print(f"  → Page {progress['current']}/{progress['total']} ({progress['percent']:.1f}%)")
                    await hal.show_image(img)
                else:
                    print("  → End of book")

            elif event.gesture in [GestureType.SWIPE_RIGHT, GestureType.TILT_BACKWARD]:
                img = reader.previous_page()
                if img:
                    progress = reader.get_reading_progress()
                    print(f"  ← Page {progress['current']}/{progress['total']} ({progress['percent']:.1f}%)")
                    await hal.show_image(img)
                else:
                    print("  ← Start of book")

            # Exit
            elif event.gesture == GestureType.LONG_PRESS:
                print("\nExiting...")
                running = False

        await asyncio.sleep(0.01)

    await hal.cleanup()
    print("Done!")


if __name__ == "__main__":
    try:
        asyncio.run(main())
    except KeyboardInterrupt:
        print("\nInterrupted")
        sys.exit(0)
    except Exception as e:
        print(f"\nError: {e}")
        import traceback
        traceback.print_exc()
        sys.exit(1)