#!/usr/bin/env python3
"""
Simple Display Example.

Demonstrates basic usage of the EReaderDisplayHAL:
- Initialize the HAL
- Display an image
- Handle touch events
- Cleanup

This example uses a virtual display (Tkinter) for testing without hardware.
To use real hardware, set virtual_display=False.
"""

import asyncio
import sys
import os

# Add src to path
sys.path.insert(0, os.path.join(os.path.dirname(__file__), '../src'))

from PIL import Image, ImageDraw, ImageFont
from dreader_hal import EReaderDisplayHAL, GestureType


async def main():
    """Main example function."""

    # Create HAL with virtual display for testing
    # For real hardware, set virtual_display=False
    hal = EReaderDisplayHAL(
        width=800,
        height=1200,
        virtual_display=True,  # Use Tkinter window for testing
        enable_orientation=False,  # Disable orientation (no hardware)
        enable_rtc=False,  # Disable RTC (no hardware)
        enable_power_monitor=False,  # Disable power monitor (no hardware)
    )

    print("Initializing HAL...")
    await hal.initialize()
    print("HAL initialized!")

    # Create a test image
    image = Image.new('RGB', (800, 1200), color=(255, 255, 255))
    draw = ImageDraw.Draw(image)

    # Draw some text
    try:
        font = ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf", 48)
    except:
        font = ImageFont.load_default()

    draw.text((50, 100), "DReader HAL Demo", fill=(0, 0, 0), font=font)
    draw.text((50, 200), "Touch anywhere to test", fill=(0, 0, 0), font=font)

    # Draw gesture instructions
    try:
        small_font = ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf", 32)
    except:
        small_font = font

    draw.text((50, 400), "Gestures:", fill=(0, 0, 0), font=small_font)
    draw.text((50, 450), "• Tap: Show coordinates", fill=(0, 0, 0), font=small_font)
    draw.text((50, 500), "• Swipe Left: Next page", fill=(0, 0, 0), font=small_font)
    draw.text((50, 550), "• Swipe Right: Previous page", fill=(0, 0, 0), font=small_font)
    draw.text((50, 600), "• Swipe Up: Open menu", fill=(0, 0, 0), font=small_font)
    draw.text((50, 650), "• Long Press: Exit", fill=(128, 128, 128), font=small_font)

    print("Displaying image...")
    await hal.show_image(image)
    print("Image displayed!")

    # Event loop - handle touch events
    print("\nWaiting for touch events...")
    print("(Long press to exit)\n")

    running = True
    while running:
        event = await hal.get_touch_event()

        if event:
            print(f"Touch event: {event.gesture.value} at ({event.x}, {event.y})")

            # Handle different gestures
            if event.gesture == GestureType.TAP:
                print(f"  → Tap detected at ({event.x}, {event.y})")

            elif event.gesture == GestureType.SWIPE_LEFT:
                print("  → Swipe left - next page")

            elif event.gesture == GestureType.SWIPE_RIGHT:
                print("  → Swipe right - previous page")

            elif event.gesture == GestureType.SWIPE_UP:
                print("  → Swipe up - open menu")

            elif event.gesture == GestureType.SWIPE_DOWN:
                print("  → Swipe down - open settings")

            elif event.gesture == GestureType.LONG_PRESS:
                print("  → Long press - exiting...")
                running = False

        # Small delay to avoid busy loop
        await asyncio.sleep(0.01)

    # Cleanup
    print("\nCleaning up...")
    await hal.cleanup()
    print("Done!")


if __name__ == "__main__":
    try:
        asyncio.run(main())
    except KeyboardInterrupt:
        print("\nInterrupted by user")