"""
DocuLens — Standalone FastAPI entry point for Hugging Face Spaces.

Pure FastAPI server served by uvicorn on port 7860 (HF Spaces default).
No Gradio dependency — just the REST API.
"""

import os
import logging

from fastapi import FastAPI
from fastapi.responses import JSONResponse

# ---------------------------------------------------------------------------
# Structured logging — configure once, before anything else logs
# ---------------------------------------------------------------------------

LOG_LEVEL = os.environ.get("LOG_LEVEL", "INFO").upper()
LOG_FORMAT = os.environ.get(
    "LOG_FORMAT",
    "%(asctime)s [%(levelname)s] %(name)s: %(message)s",
)

logging.basicConfig(
    level=getattr(logging, LOG_LEVEL, logging.INFO),
    format=LOG_FORMAT,
    datefmt="%Y-%m-%d %H:%M:%S",
)

# Quieten noisy third-party loggers
for _noisy in ("httpx", "httpcore", "urllib3", "uvicorn.access"):
    logging.getLogger(_noisy).setLevel(logging.WARNING)

logger = logging.getLogger(__name__)

# ---------------------------------------------------------------------------
# FastAPI application
# ---------------------------------------------------------------------------

app = FastAPI(
    title="DocuLens",
    description="AI-Powered Invoice & Document Extraction API",
    version="1.2.0",
)

# ---------------------------------------------------------------------------
# CORS — applied BEFORE startup (unlike the Gradio version, this works)
# ---------------------------------------------------------------------------

from api import add_cors_middleware

add_cors_middleware(app)

# ---------------------------------------------------------------------------
# Mount all API routers
# ---------------------------------------------------------------------------

from api import api_router
from api_runs import runs_router
from api_prompts import prompts_router
from api_chat import chat_router
from api_webhooks import webhooks_router
from api_export import export_router
from api_batch import batch_router
from api_tiers import tiers_router
from api_golden import golden_router

app.include_router(api_router)
app.include_router(runs_router)
app.include_router(prompts_router)
app.include_router(chat_router)
app.include_router(webhooks_router)
app.include_router(export_router)
app.include_router(batch_router)
app.include_router(tiers_router)
app.include_router(golden_router)

# ---------------------------------------------------------------------------
# Root route — useful for health probes and quick verification
# ---------------------------------------------------------------------------


@app.get("/")
async def root():
    return JSONResponse(
        {
            "service": "DocuLens",
            "version": "1.2.0",
            "status": "running",
            "docs": "/docs",
            "health": "/api/v1/health",
        }
    )


# ---------------------------------------------------------------------------
# Entry point — HF Spaces uses port 7860 by default
# ---------------------------------------------------------------------------

if __name__ == "__main__":
    import uvicorn

    port = int(os.environ.get("PORT", "7860"))
    logger.info("Starting DocuLens on port %d", port)
    uvicorn.run(
        "main:app",
        host="0.0.0.0",
        port=port,
        log_level=LOG_LEVEL.lower(),
    )