app.py

"""
Flare – Main Application (Refactored)
=====================================
"""

from fastapi import FastAPI
from fastapi.staticfiles import StaticFiles
from fastapi.responses import FileResponse
from fastapi.middleware.cors import CORSMiddleware
import uvicorn
import os
from pathlib import Path
import mimetypes
from websocket_handler import websocket_endpoint

from utils import log
from chat_handler import router as chat_router  # ← start_session & chat
from admin_routes import router as admin_router, start_cleanup_task
from llm_startup import run_in_thread  # Changed from spark_startup
from session import session_store, start_session_cleanup

from config_provider import ConfigProvider

# ===================== Environment Setup =====================
def setup_environment():
    """Setup environment based on deployment mode"""
    cfg = ConfigProvider.get()
    
    log("=" * 60)
    log(f"🚀 Flare Starting")
    log(f"🔌 LLM Provider: {cfg.global_config.llm_provider.name}")
    log(f"🎤 TTS Provider: {cfg.global_config.tts_provider.name}")
    log(f"🎧 STT Provider: {cfg.global_config.stt_provider.name}")
    log("=" * 60)
    
    if cfg.global_config.is_cloud_mode():
        log("☁️  Cloud Mode: Using HuggingFace Secrets")
        log("📌 Required secrets: JWT_SECRET, FLARE_TOKEN_KEY")
        
        # Check for provider-specific tokens
        llm_config = cfg.global_config.get_provider_config("llm", cfg.global_config.llm_provider.name)
        if llm_config and llm_config.requires_repo_info:
            log("📌 LLM requires SPARK_TOKEN for repository operations")
    else:
        log("🏢 On-Premise Mode: Using .env file")
        if not Path(".env").exists():
            log("⚠️  WARNING: .env file not found!")
            log("📌 Copy .env.example to .env and configure it")

# Run setup
setup_environment()

# Fix MIME types for JavaScript files
mimetypes.add_type("application/javascript", ".js")
mimetypes.add_type("text/css", ".css")

app = FastAPI(
    title="Flare Orchestration Service",
    version="2.0.0",
    description="LLM-driven intent & API flow engine with multi-provider support",
)

# CORS for development
if os.getenv("ENVIRONMENT") == "development":
    app.add_middleware(
        CORSMiddleware,
        allow_origins=["http://localhost:4200"],  # Angular dev server
        allow_credentials=True,
        allow_methods=["*"],
        allow_headers=["*"],
    )
    log("🔧 CORS enabled for development")
    
run_in_thread()  # Start LLM startup notifier if needed
start_cleanup_task()  # Activity log cleanup
start_session_cleanup()  # Session cleanup

# ---------------- Health probe (HF Spaces watchdog) -----------------
@app.get("/")
def health_check():
    return {"status": "ok", "version": "2.0.0"}

# ---------------- Core chat/session routes --------------------------
app.include_router(chat_router, prefix="/api")

# ---------------- Admin API routes ----------------------------------
app.include_router(admin_router)

# ---------------- WebSocket route for real-time STT ------------------
@app.websocket("/ws/conversation/{session_id}")
async def conversation_websocket(websocket: WebSocket, session_id: str):
    await websocket_endpoint(websocket, session_id)
    
# ---------------- Serve Angular UI if exists ------------------------
static_dir = Path(__file__).parent / "static"
if static_dir.exists():
    log("🎨 Serving Angular UI from /static directory")
    
    # Mount static files with custom handler for Angular routing
    @app.get("/{path:path}")
    async def serve_angular(path: str):
        # API routes should not be handled here
        if path.startswith("api/"):
            return {"error": "Not found"}, 404
            
        # Try to serve the exact file first
        file_path = static_dir / path
        if file_path.is_file():
            return FileResponse(file_path)
        
        # For Angular routes, always serve index.html
        index_path = static_dir / "index.html"
        if index_path.exists():
            return FileResponse(index_path)
        
        return {"error": "Not found"}, 404
    
    # Mount static files for assets
    app.mount("/", StaticFiles(directory=str(static_dir), html=True), name="static")
else:
    log("⚠️ No UI found. Run 'cd flare-ui && npm run build' to build the UI.")

if __name__ == "__main__":
    log("🌐 Starting Flare backend on port 7860...")
    uvicorn.run(app, host="0.0.0.0", port=7860)