from fastapi import FastAPI, Request
from fastapi.middleware.cors import CORSMiddleware
from fastapi.staticfiles import StaticFiles
import gradio as gr
import uvicorn
import os
import sys
import logging

# Ensure local modules are importable
sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
import test
import chat

app = FastAPI(
    # Respect Hugging Face Spaces reverse proxy path/prefix when present
    root_path=os.environ.get("SPACE_ROOT_PATH", "")
)

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

# -------------------------------------------------------------------
# Full API Forwarding Layer for chat.py and test.py
# -------------------------------------------------------------------

# === chat.py API endpoints ===
@app.post("/update_chat")
async def update_chat_route(request: Request):
    return await chat.update_chat(request)

@app.get("/unified_stream")
async def unified_stream_route(request: Request):
    # Diagnostics: log what we see at the unified server layer
    q_sid = request.query_params.get("session_id")
    c_sid = request.cookies.get("mcp_blockly_session_id")
    hdr_sid = request.headers.get("x-session-id") or request.headers.get("session-id")
    root_path = request.scope.get("root_path")
    logging.getLogger("unified_server").info(
        f"[unified_stream_route] query_sid={q_sid}, cookie_sid={c_sid}, header_sid={hdr_sid}, root_path={root_path}"
    )
    return await chat.unified_stream(session_id=q_sid, request=request)

@app.post("/request_result")
async def request_result_route(request: Request):
    return await chat.request_result(request)


# === test.py API endpoints ===
@app.post("/update_code")
async def update_code_route(request: Request):
    return await test.update_code(request)

@app.get("/get_latest_code")
async def get_latest_code_route():
    return await test.get_latest_code()

# Serve built frontend WITHOUT shadowing Gradio paths
from fastapi.responses import FileResponse

frontend_dir = os.path.join(os.path.dirname(__file__), "dist")
if not os.path.exists(frontend_dir):
    os.makedirs(frontend_dir)

@app.get("/")
def serve_index():
    return FileResponse(os.path.join(frontend_dir, "index.html"))

@app.get("/bundle.js")
def serve_bundle():
    return FileResponse(os.path.join(frontend_dir, "bundle.js"))

# Optionally serve other built assets if needed
app.mount("/assets", StaticFiles(directory=frontend_dir), name="assets")

# Mount both Gradio interfaces
test_demo = test.get_gradio_interface()
chat_demo = chat.get_chat_gradio_interface()

# Mount the Gradio apps directly
app = gr.mount_gradio_app(app, test_demo, path="/gradio-test")
app = gr.mount_gradio_app(app, chat_demo, path="/gradio-chat")

print("new /gradio-test")
print("new /gradio-chat")

if __name__ == "__main__":
    port = int(os.getenv("PORT", 8080))
    print(f"[UNIFIED] running on http://127.0.0.1:{port}")
    print(f"- /gradio-test")
    print(f"- /gradio-chat")
    uvicorn.run(
        app,
        host="0.0.0.0",
        port=port,
        log_level="critical",
        # Tell Uvicorn to trust proxy headers so scheme becomes https on HF Spaces
        proxy_headers=True,
        forwarded_allow_ips="*",
    )