wled-screen-controller-mixed/server/src/wled_controller/main.py

"""FastAPI application entry point."""

import sys
from contextlib import asynccontextmanager
from pathlib import Path

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import JSONResponse, FileResponse
from fastapi.staticfiles import StaticFiles

from wled_controller import __version__
from wled_controller.api import router
from wled_controller.api.dependencies import init_dependencies
from wled_controller.config import get_config
from wled_controller.core.processor_manager import ProcessorManager, ProcessingSettings
from wled_controller.storage import DeviceStore
from wled_controller.storage.template_store import TemplateStore
from wled_controller.storage.postprocessing_template_store import PostprocessingTemplateStore
from wled_controller.storage.pattern_template_store import PatternTemplateStore
from wled_controller.storage.picture_source_store import PictureSourceStore
from wled_controller.storage.picture_target_store import PictureTargetStore
from wled_controller.storage.wled_picture_target import WledPictureTarget
from wled_controller.storage.key_colors_picture_target import KeyColorsPictureTarget
from wled_controller.utils import setup_logging, get_logger

# Initialize logging
setup_logging()
logger = get_logger(__name__)

# Get configuration
config = get_config()

# Initialize storage and processing
device_store = DeviceStore(config.storage.devices_file)
template_store = TemplateStore(config.storage.templates_file)
pp_template_store = PostprocessingTemplateStore(config.storage.postprocessing_templates_file)
picture_source_store = PictureSourceStore(config.storage.picture_sources_file)
picture_target_store = PictureTargetStore(config.storage.picture_targets_file)
pattern_template_store = PatternTemplateStore(config.storage.pattern_templates_file)

processor_manager = ProcessorManager(
    picture_source_store=picture_source_store,
    capture_template_store=template_store,
    pp_template_store=pp_template_store,
    pattern_template_store=pattern_template_store,
)


def _migrate_devices_to_targets():
    """One-time migration: create picture targets from legacy device settings.

    If the target store is empty and any device has legacy picture_source_id
    or settings in raw JSON, migrate them to WledPictureTargets.
    """
    if picture_target_store.count() > 0:
        return  # Already have targets, skip migration

    raw = device_store.load_raw()
    devices_raw = raw.get("devices", {})
    if not devices_raw:
        return

    migrated = 0
    for device_id, device_data in devices_raw.items():
        legacy_source_id = device_data.get("picture_source_id", "")
        legacy_settings = device_data.get("settings", {})

        if not legacy_source_id and not legacy_settings:
            continue

        # Build ProcessingSettings from legacy data
        from wled_controller.core.processor_manager import DEFAULT_STATE_CHECK_INTERVAL
        settings = ProcessingSettings(
            display_index=legacy_settings.get("display_index", 0),
            fps=legacy_settings.get("fps", 30),
            border_width=legacy_settings.get("border_width", 10),
            brightness=legacy_settings.get("brightness", 1.0),
            gamma=legacy_settings.get("gamma", 2.2),
            saturation=legacy_settings.get("saturation", 1.0),
            smoothing=legacy_settings.get("smoothing", 0.3),
            interpolation_mode=legacy_settings.get("interpolation_mode", "average"),
            state_check_interval=legacy_settings.get("state_check_interval", DEFAULT_STATE_CHECK_INTERVAL),
        )

        device_name = device_data.get("name", device_id)
        target_name = f"{device_name} Target"

        try:
            target = picture_target_store.create_target(
                name=target_name,
                target_type="wled",
                device_id=device_id,
                picture_source_id=legacy_source_id,
                settings=settings,
                description=f"Auto-migrated from device {device_name}",
            )
            migrated += 1
            logger.info(f"Migrated device {device_id} -> target {target.id}")
        except Exception as e:
            logger.error(f"Failed to migrate device {device_id} to target: {e}")

    if migrated > 0:
        logger.info(f"Migration complete: created {migrated} picture target(s) from legacy device settings")


@asynccontextmanager
async def lifespan(app: FastAPI):
    """Application lifespan manager.

    Handles startup and shutdown events.
    """
    # Startup
    logger.info(f"Starting LED Grab v{__version__}")
    logger.info(f"Python version: {sys.version}")
    logger.info(f"Server listening on {config.server.host}:{config.server.port}")

    # Validate authentication configuration
    if not config.auth.api_keys:
        logger.error("=" * 70)
        logger.error("CRITICAL: No API keys configured!")
        logger.error("Authentication is REQUIRED for all API requests.")
        logger.error("Please add API keys to your configuration:")
        logger.error("  1. Generate keys: openssl rand -hex 32")
        logger.error("  2. Add to config/default_config.yaml under auth.api_keys")
        logger.error("  3. Format: label: \"your-generated-key\"")
        logger.error("=" * 70)
        raise RuntimeError("No API keys configured - server cannot start without authentication")

    # Log authentication status
    logger.info(f"API Authentication: ENFORCED ({len(config.auth.api_keys)} clients configured)")
    client_labels = ", ".join(config.auth.api_keys.keys())
    logger.info(f"Authorized clients: {client_labels}")
    logger.info("All API requests require valid Bearer token authentication")

    # Run migrations
    _migrate_devices_to_targets()

    # Initialize API dependencies
    init_dependencies(
        device_store, template_store, processor_manager,
        pp_template_store=pp_template_store,
        pattern_template_store=pattern_template_store,
        picture_source_store=picture_source_store,
        picture_target_store=picture_target_store,
    )

    # Register devices in processor manager for health monitoring
    devices = device_store.get_all_devices()
    for device in devices:
        try:
            processor_manager.add_device(
                device_id=device.id,
                device_url=device.url,
                led_count=device.led_count,
                calibration=device.calibration,
            )
            logger.info(f"Registered device: {device.name} ({device.id})")
        except Exception as e:
            logger.error(f"Failed to register device {device.id}: {e}")

    logger.info(f"Registered {len(devices)} devices for health monitoring")

    # Register picture targets in processor manager
    targets = picture_target_store.get_all_targets()
    registered_targets = 0
    for target in targets:
        if isinstance(target, WledPictureTarget) and target.device_id:
            try:
                processor_manager.add_target(
                    target_id=target.id,
                    device_id=target.device_id,
                    settings=target.settings,
                    picture_source_id=target.picture_source_id,
                )
                registered_targets += 1
                logger.info(f"Registered target: {target.name} ({target.id})")
            except Exception as e:
                logger.error(f"Failed to register target {target.id}: {e}")
        elif isinstance(target, KeyColorsPictureTarget):
            try:
                processor_manager.add_kc_target(
                    target_id=target.id,
                    picture_source_id=target.picture_source_id,
                    settings=target.settings,
                )
                registered_targets += 1
                logger.info(f"Registered KC target: {target.name} ({target.id})")
            except Exception as e:
                logger.error(f"Failed to register KC target {target.id}: {e}")

    logger.info(f"Registered {registered_targets} picture target(s)")

    # Start background health monitoring for all devices
    await processor_manager.start_health_monitoring()

    yield

    # Shutdown
    logger.info("Shutting down LED Grab")

    # Stop all processing
    try:
        await processor_manager.stop_all()
        logger.info("Stopped all processors")
    except Exception as e:
        logger.error(f"Error stopping processors: {e}")

# Create FastAPI application
app = FastAPI(
    title="LED Grab",
    description="Control WLED devices based on screen content for ambient lighting",
    version=__version__,
    lifespan=lifespan,
    docs_url="/docs",
    redoc_url="/redoc",
    openapi_url="/openapi.json",
)

# Configure CORS
app.add_middleware(
    CORSMiddleware,
    allow_origins=config.server.cors_origins,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# Include API routes
app.include_router(router)

# Mount static files
static_path = Path(__file__).parent / "static"
if static_path.exists():
    app.mount("/static", StaticFiles(directory=str(static_path)), name="static")
    logger.info(f"Mounted static files from {static_path}")
else:
    logger.warning(f"Static files directory not found: {static_path}")


@app.exception_handler(Exception)
async def global_exception_handler(request, exc):
    """Global exception handler for unhandled errors."""
    logger.error(f"Unhandled exception: {exc}", exc_info=True)

    return JSONResponse(
        status_code=500,
        content={
            "error": "InternalServerError",
            "message": "An unexpected error occurred",
            "detail": str(exc) if config.server.log_level == "DEBUG" else None,
        },
    )


@app.get("/")
async def root():
    """Serve the web UI dashboard."""
    static_path = Path(__file__).parent / "static" / "index.html"
    if static_path.exists():
        return FileResponse(static_path)

    # Fallback to JSON if static files not found
    return {
        "name": "LED Grab",
        "version": __version__,
        "docs": "/docs",
        "health": "/health",
        "api": "/api/v1",
    }


if __name__ == "__main__":
    import uvicorn

    uvicorn.run(
        "wled_controller.main:app",
        host=config.server.host,
        port=config.server.port,
        log_level=config.server.log_level.lower(),
        reload=False,  # Disabled due to watchfiles infinite reload loop
    )