#!/usr/bin/env python3
"""
LEGO Dimensions Portal CLI Client
Moonlight Drive-In Theater System

Reads LEGO Dimensions character/vehicle discs from the USB portal
and sends legacy keys to the video player server.

Requirements:
    pip install pyusb libusb-package requests
    
Windows Driver Setup:
    Use Zadig to install WinUSB driver for "LEGO READER V2.10"
"""

import requests
import sys
import argparse
import time
import os

# Add current directory to path for lego_dimensions_reader import
sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))

from lego_dimensions_reader import (
    LegoDimensionsReader,
    TagInfo,
    Pad,
    COLORS,
    generate_password,
    __version__ as READER_VERSION
)

# Default server settings
DEFAULT_SERVER = "100.94.163.117"
DEFAULT_PORT = 8547

# Tag colors config file
TAG_COLORS_FILE = "tag_colors.json"

# =============================================================================
# TAG COLOR MAPPINGS (loaded from tag_colors.json)
# =============================================================================

def load_tag_colors(filepath: str = TAG_COLORS_FILE) -> tuple:
    """
    Load tag color mappings from JSON file.
    Returns (tag_colors_dict, default_config)
    """
    import json
    
    default_config = {
        'color': COLORS['CYAN'],
        'effect': 'solid',
        'name': 'Default'
    }
    
    tag_colors = {}
    
    # Try to find the config file
    search_paths = [
        filepath,
        os.path.join(os.path.dirname(os.path.abspath(__file__)), filepath),
        os.path.join(os.getcwd(), filepath),
    ]
    
    config_path = None
    for path in search_paths:
        if os.path.exists(path):
            config_path = path
            break
    
    if config_path is None:
        print(f"  Note: {filepath} not found, using default colors")
        return tag_colors, default_config
    
    try:
        with open(config_path, 'r', encoding='utf-8') as f:
            data = json.load(f)
        
        # Load default config
        if 'default' in data:
            default_config = {
                'color': data['default'].get('color', COLORS['CYAN']),
                'effect': data['default'].get('effect', 'solid'),
                'name': data['default'].get('name', 'Default')
            }
        
        # Load tag mappings (convert string keys to int)
        if 'tags' in data:
            for key, config in data['tags'].items():
                try:
                    legacy_key = int(key)
                    tag_colors[legacy_key] = {
                        'color': config.get('color', COLORS['CYAN']),
                        'effect': config.get('effect', 'solid'),
                        'name': config.get('name', '')
                    }
                except ValueError:
                    pass  # Skip invalid keys
        
        print(f"  Loaded {len(tag_colors)} tag color mappings from {filepath}")
        
    except json.JSONDecodeError as e:
        print(f"  Warning: Invalid JSON in {filepath}: {e}")
    except Exception as e:
        print(f"  Warning: Could not load {filepath}: {e}")
    
    return tag_colors, default_config


# Will be loaded at runtime
TAG_COLORS = {}
DEFAULT_TAG_COLOR = {
    'color': COLORS['CYAN'],
    'effect': 'solid',
    'name': 'Default'
}


def uid_to_legacy_key(uid: bytes) -> int:
    """
    Convert 7-byte UID to legacy integer key format.
    Uses bytes 3-6 (the unique portion) as a 32-bit little-endian integer.
    """
    if len(uid) >= 7:
        return int.from_bytes(uid[3:7], byteorder='little')
    elif len(uid) >= 4:
        return int.from_bytes(uid[:4], byteorder='little')
    else:
        return int.from_bytes(uid.ljust(4, b'\x00'), byteorder='little')


def send_nfc(server_ip, port, nfc_id):
    """Send NFC command to server"""
    url = f"http://{server_ip}:{port}/api/video/play"
    
    try:
        print(f"Sending NFC '{nfc_id}' to {server_ip}:{port}...")
        response = requests.post(url, json={'nfc_id': str(nfc_id)}, timeout=5)
        
        if response.status_code == 200:
            result = response.json()
            if result.get('success'):
                print(f"✓ SUCCESS: {result.get('message', 'Command sent')}")
                return True
            else:
                print(f"✗ FAILED: {result.get('message', 'Unknown error')}")
                return False
        else:
            print(f"✗ HTTP Error: {response.status_code}")
            return False
            
    except requests.exceptions.ConnectionError:
        print(f"✗ Cannot connect to server at {server_ip}:{port}")
        return False
    except requests.exceptions.Timeout:
        print(f"✗ Request timeout - server not responding")
        return False
    except Exception as e:
        print(f"✗ Error: {e}")
        return False


def send_skip(server_ip, port):
    """Send skip command"""
    url = f"http://{server_ip}:{port}/api/video/skip"
    
    try:
        print(f"Sending skip command to {server_ip}:{port}...")
        response = requests.post(url, timeout=5)
        
        if response.status_code == 200:
            print("✓ Skip command sent")
            return True
        else:
            print(f"✗ HTTP Error: {response.status_code}")
            return False
            
    except Exception as e:
        print(f"✗ Error: {e}")
        return False


def test_connection(server_ip, port):
    """Test connection to server"""
    url = f"http://{server_ip}:{port}/api/stats"
    
    try:
        print(f"Testing connection to {server_ip}:{port}...")
        response = requests.get(url, timeout=3)
        
        if response.status_code == 200:
            print("✓ Server is online and responding")
            stats = response.json()
            print(f"  Videos played: {stats.get('videos_played', 'N/A')}")
            print(f"  Current video: {stats.get('current_video', 'N/A')}")
            print(f"  Uptime: {stats.get('uptime', 'N/A')}")
            return True
        else:
            print(f"✗ Server error: HTTP {response.status_code}")
            return False
            
    except requests.exceptions.ConnectionError:
        print(f"✗ Cannot connect to server at {server_ip}:{port}")
        print("  Make sure:")
        print("  1. The video player is running")
        print("  2. Web interface is enabled")
        print("  3. IP address and port are correct")
        print("  4. Firewall allows the connection")
        return False
    except Exception as e:
        print(f"✗ Error: {e}")
        return False


def portal_mode(server_ip, port):
    """Portal mode - read tags from LEGO Dimensions portal"""
    global TAG_COLORS, DEFAULT_TAG_COLOR
    
    print("\n" + "="*60)
    print("LEGO DIMENSIONS PORTAL MODE")
    print("="*60)
    print(f"Server: {server_ip}:{port}")
    print(f"Reader version: {READER_VERSION}")
    
    # Load tag colors from JSON
    TAG_COLORS, DEFAULT_TAG_COLOR = load_tag_colors()
    
    print("="*60)
    print()
    
    # Track last sent to avoid duplicates
    last_sent_key = None
    last_sent_time = 0
    DEBOUNCE_TIME = 2.0  # Seconds before allowing same tag again
    
    # Will be set after reader is created
    reader = None
    
    def apply_tag_color(legacy_key: int):
        """Apply color effect to ALL pads based on tag mapping"""
        if reader is None:
            return
            
        # Look up color config for this tag
        config = TAG_COLORS.get(legacy_key, DEFAULT_TAG_COLOR)
        color = config.get('color', COLORS['CYAN'])
        effect = config.get('effect', 'solid')
        name = config.get('name', '')
        
        if name:
            print(f"    Theme: {name}")
        
        # Apply effect to ALL pads
        if effect == 'pulse':
            # Slow pulsing fade on all pads (count=255 for continuous)
            reader.fade_pad(Pad.ALL, color, speed=15, count=255)
        elif effect == 'flash':
            # Quick flashing on all pads
            reader.flash_pad(Pad.ALL, color, on_time=8, off_time=8, count=255)
        else:
            # Solid color on all pads
            reader.set_pad_color(Pad.ALL, color)
    
    def on_tag_insert(tag: TagInfo):
        nonlocal last_sent_key, last_sent_time
        
        legacy_key = uid_to_legacy_key(tag.uid)
        current_time = time.time()
        
        print()
        print(f"[+] TAG DETECTED on {tag.pad.name} pad")
        print(f"    UID: {tag.uid_hex}")
        print(f"    Legacy Key: {legacy_key}")
        
        # Step 1: ALL LEDs OFF
        if reader:
            reader.set_pad_color(Pad.ALL, COLORS['OFF'])
        
        # Debounce - don't resend same tag too quickly
        if legacy_key == last_sent_key and (current_time - last_sent_time) < DEBOUNCE_TIME:
            print(f"    (Skipping server - same tag sent {current_time - last_sent_time:.1f}s ago)")
            # Still apply the theme effect even if skipping server
            apply_tag_color(legacy_key)
            return
        
        # Send to server
        print()
        if send_nfc(server_ip, port, legacy_key):
            last_sent_key = legacy_key
            last_sent_time = current_time
            
            if reader:
                # Step 2: Blue blink CENTER to confirm scan
                reader.set_pad_color(Pad.CENTER, COLORS['BLUE'])
                time.sleep(0.15)
                
                # Step 3: ALL OFF
                reader.set_pad_color(Pad.ALL, COLORS['OFF'])
                time.sleep(0.1)
                
                # Step 4: Apply theme effect to ALL pads
                apply_tag_color(legacy_key)
        print()
    
    def on_tag_remove(tag: TagInfo):
        print(f"[-] TAG REMOVED from {tag.pad.name} pad")
        # Turn off ALL pad LEDs
        if reader:
            reader.set_pad_color(Pad.ALL, COLORS['OFF'])
    
    def on_connect():
        print("✓ Portal connected and initialized")
        print()
        print("Place LEGO Dimensions discs on the portal...")
        print("Press Ctrl+C to exit")
        print()
    
    def on_disconnect():
        print("\n✗ Portal disconnected")
    
    def on_error(e):
        print(f"\n✗ Portal error: {e}")
    
    # Initialize reader
    reader = LegoDimensionsReader()
    reader.on_tag_insert = on_tag_insert
    reader.on_tag_remove = on_tag_remove
    reader.on_connect = on_connect
    reader.on_disconnect = on_disconnect
    reader.on_error = on_error
    
    try:
        print("Connecting to portal...")
        reader.start()
        
        # Keep running
        while True:
            time.sleep(0.5)
            
    except KeyboardInterrupt:
        print("\n\nExiting...")
    except ConnectionError as e:
        print(f"\n✗ {e}")
        return False
    finally:
        reader.disconnect()
        print("Portal disconnected. Goodbye!")
    
    return True


def interactive_mode(server_ip, port):
    """Interactive mode for manual NFC input (no portal needed)"""
    print("\n" + "="*60)
    print("INTERACTIVE MODE (Manual Input)")
    print("="*60)
    print(f"Server: {server_ip}:{port}")
    print("Commands:")
    print("  - Type NFC ID and press Enter to send")
    print("  - Type 'skip' to skip current video")
    print("  - Type 'test' to test connection")
    print("  - Type 'quit' or 'exit' to exit")
    print("="*60)
    print()
    
    while True:
        try:
            command = input("NFC> ").strip()
            
            if not command:
                continue
            
            if command.lower() in ['quit', 'exit', 'q']:
                print("Exiting...")
                break
            
            if command.lower() == 'skip':
                send_skip(server_ip, port)
                continue
            
            if command.lower() == 'test':
                test_connection(server_ip, port)
                continue
            
            # Assume it's an NFC ID
            send_nfc(server_ip, port, command)
            
        except KeyboardInterrupt:
            print("\nExiting...")
            break
        except EOFError:
            break


def main():
    """Main entry point"""
    parser = argparse.ArgumentParser(
        description='LEGO Dimensions Portal Client - Send NFC commands to video player',
        formatter_class=argparse.RawDescriptionHelpFormatter,
        epilog=f"""
Default server: {DEFAULT_SERVER}:{DEFAULT_PORT}

Examples:
  # Portal mode (default) - read tags from LEGO Dimensions portal
  python dimensions_cli_client.py
  
  # Test connection first
  python dimensions_cli_client.py -t
  
  # Send single NFC command manually
  python dimensions_cli_client.py -n 12345678
  
  # Skip current video
  python dimensions_cli_client.py --skip
  
  # Manual interactive mode (no portal)
  python dimensions_cli_client.py -i
  
  # Use different server
  python dimensions_cli_client.py -s 192.168.1.100 -p 8547
        """
    )
    
    parser.add_argument('-s', '--server', 
                       default=DEFAULT_SERVER,
                       help=f'Server IP address (default: {DEFAULT_SERVER})')
    
    parser.add_argument('-p', '--port', 
                       type=int,
                       default=DEFAULT_PORT,
                       help=f'Server port (default: {DEFAULT_PORT})')
    
    parser.add_argument('-n', '--nfc',
                       help='NFC ID to send (manual, no portal needed)')
    
    parser.add_argument('-t', '--test',
                       action='store_true',
                       help='Test connection to server')
    
    parser.add_argument('--skip',
                       action='store_true',
                       help='Send skip video command')
    
    parser.add_argument('-i', '--interactive',
                       action='store_true',
                       help='Manual interactive mode (no portal)')
    
    args = parser.parse_args()
    
    print("="*60)
    print("LEGO Dimensions Portal Client")
    print("Moonlight Drive-In Theater System")
    print("="*60)
    
    # Test connection
    if args.test:
        test_connection(args.server, args.port)
        return 0
    
    # Send skip
    if args.skip:
        success = send_skip(args.server, args.port)
        return 0 if success else 1
    
    # Send manual NFC
    if args.nfc:
        success = send_nfc(args.server, args.port, args.nfc)
        return 0 if success else 1
    
    # Manual interactive mode
    if args.interactive:
        interactive_mode(args.server, args.port)
        return 0
    
    # Default: Portal mode
    success = portal_mode(args.server, args.port)
    return 0 if success else 1


if __name__ == "__main__":
    sys.exit(main())