import logging
import os
from logging.handlers import RotatingFileHandler
from pathlib import Path

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import FileResponse

from app.routers import ingest, query, documents, prompts, history, chunks, video, ws_asr, test_generate, test_evaluate
from app.core.config import get_settings
from app.core.sqlite_db import (
    get_prompts_db,
    get_history_db,
    init_prompts_db,
    init_history_db,
    seed_default_profiles,
)

# Configure logging before app initialization
LOG_DIR = Path(__file__).parent / "log"
LOG_DIR.mkdir(exist_ok=True)

LOG_FILE = LOG_DIR / "backend.log"
LOG_FORMAT = "%(asctime)s - %(name)s - %(levelname)s - %(message)s"

# Root logger configuration
logging.basicConfig(
    level=logging.INFO,
    format=LOG_FORMAT,
    handlers=[
        RotatingFileHandler(
            LOG_FILE,
            maxBytes=10 * 1024 * 1024,  # 10MB per file
            backupCount=5,  # Keep 5 backup files
            encoding="utf-8",
        ),
        logging.StreamHandler(),  # Also keep console output
    ],
)

settings = get_settings()
app = FastAPI(title="RAG Video Q&A", version="1.0.0")

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

app.include_router(ingest.router, prefix="/api/v1")
app.include_router(query.router, prefix="/api/v1")
app.include_router(documents.router, prefix="/api/v1")
app.include_router(prompts.router)
app.include_router(history.router)
app.include_router(chunks.router)
app.include_router(video.router, prefix="/api/v1")
app.include_router(ws_asr.router)
app.include_router(test_generate.router, prefix="/api/v1")
app.include_router(test_evaluate.router, prefix="/api/v1")

_prompts_conn = get_prompts_db()
init_prompts_db(_prompts_conn)
seed_default_profiles(_prompts_conn)
_prompts_conn.close()

_history_conn = get_history_db()
init_history_db(_history_conn)
_history_conn.close()


@app.get("/health")
def health_check():
    return {"status": "ok"}

_frontend_dist = Path(__file__).resolve().parent.parent / "frontend" / "dist"
if _frontend_dist.is_dir():
    @app.get("/{full_path:path}")
    async def serve_frontend(full_path: str):
        path = _frontend_dist / (full_path or "index.html")
        if path.is_file():
            return FileResponse(str(path))
        return FileResponse(str(_frontend_dist / "index.html"))