backend/app/main.py

"""FastAPI application entry point."""

from pathlib import Path
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.staticfiles import StaticFiles
from fastapi.responses import FileResponse
import uvicorn

from .api.routes import router

# Create FastAPI app
app = FastAPI(
    title="Package Delivery Search API",
    description="Search algorithms for package delivery optimization",
    version="1.0.0",
)

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

# Include API routes
app.include_router(router)

# Serve static frontend files
static_dir = Path("/app/frontend/dist")
if static_dir.exists():
    # Mount assets directory
    app.mount(
        "/assets", StaticFiles(directory=str(static_dir / "assets")), name="assets"
    )

    # Serve index.html for root and all non-API routes
    @app.get("/")
    async def serve_root():
        return FileResponse(str(static_dir / "index.html"))

    @app.get("/{full_path:path}")
    async def serve_frontend(full_path: str):
        # Don't intercept API routes
        if full_path.startswith("api/"):
            return {"error": "API endpoint not found"}

        # Try to serve the requested file
        file_path = static_dir / full_path
        if file_path.is_file():
            return FileResponse(str(file_path))

        # Otherwise serve index.html (SPA routing)
        return FileResponse(str(static_dir / "index.html"))

else:

    @app.get("/")
    async def root():
        """Root endpoint."""
        return {
            "name": "Package Delivery Search API",
            "version": "1.0.0",
            "endpoints": {
                "health": "/api/health",
                "algorithms": "/api/algorithms",
                "generate": "/api/grid/generate",
                "path": "/api/search/path",
                "plan": "/api/search/plan",
                "compare": "/api/search/compare",
            },
        }


if __name__ == "__main__":
    uvicorn.run(app, host="0.0.0.0", port=8000)