import os
from contextlib import asynccontextmanager
from fastapi import FastAPI
from fastapi.staticfiles import StaticFiles
from fastapi.responses import FileResponse, JSONResponse
from fastapi.middleware.cors import CORSMiddleware
from fastapi.middleware.gzip import GZipMiddleware

from backend.database import init_db


@asynccontextmanager
async def lifespan(app: FastAPI):
    init_db()
    yield


app = FastAPI(
    title="Compost API",
    description="Unified AI Tool Integration Platform",
    version="1.0.0",
    docs_url="/api/docs",
    redoc_url="/api/redoc",
    lifespan=lifespan
)

app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)
app.add_middleware(GZipMiddleware, minimum_size=1000)

from backend.routers import auth, apps, tools, connections, apikeys, analytics, playground, settings, mcp, auth_configs

app.include_router(auth.router, prefix="/api/auth", tags=["auth"])
app.include_router(apps.router, prefix="/api/apps", tags=["apps"])
app.include_router(tools.router, prefix="/api/tools", tags=["tools"])
app.include_router(connections.router, prefix="/api/connections", tags=["connections"])
app.include_router(apikeys.router, prefix="/api/apikeys", tags=["apikeys"])
app.include_router(analytics.router, prefix="/api/analytics", tags=["analytics"])
app.include_router(playground.router, prefix="/api/playground", tags=["playground"])
app.include_router(settings.router, prefix="/api/settings", tags=["settings"])
app.include_router(mcp.router, prefix="/mcp", tags=["mcp"])
app.include_router(auth_configs.router, prefix="/api/auth-configs", tags=["auth-configs"])

@app.get("/health")
async def health():
    return {"status": "healthy", "version": "1.0.0"}


STATIC_DIR = os.path.join(os.path.dirname(__file__), "static")

if os.path.exists(STATIC_DIR):
    app.mount("/_next", StaticFiles(directory=f"{STATIC_DIR}/_next"), name="next-assets")

    @app.get("/{full_path:path}")
    async def serve_spa(full_path: str):
        if full_path.startswith("api/") or full_path.startswith("mcp/") or full_path == "health":
            return JSONResponse({"detail": "Not found"}, status_code=404)
        static_file = os.path.join(STATIC_DIR, full_path)
        if os.path.isfile(static_file):
            return FileResponse(static_file)
        return FileResponse(os.path.join(STATIC_DIR, "index.html"))

    @app.get("/")
    async def root():
        return FileResponse(os.path.join(STATIC_DIR, "index.html"))