import asyncio
import logging
from fastapi import FastAPI, Request
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import JSONResponse
from fastapi.exceptions import RequestValidationError, HTTPException
from starlette.status import HTTP_400_BAD_REQUEST
from App.routers.stocks.routes import router as stocks_router
from App.routers.funds.routes import router as funds_router
from App.routers.bonds.routes import router as bonds_router
from App.routers.tasks.routes import router as tasks_router
from App.routers.users.routes import router as users_router
from App.routers.portfolio.routes import router as portfolio_router
from App.routers.admin.routes import router as admin_router
from App.routers.economy.config import load_local_env
from App.routers.economy.routes import api_router as economy_api_router, router as economy_router
from uvicorn.middleware.proxy_headers import ProxyHeadersMiddleware
from App.schemas import ResponseModel, AppException
from App.scheduler import scheduled_economy_loop, scheduled_market_loop, scheduled_news_loop

from db import init_db, close_db, clear_db

logging.basicConfig(
    level=logging.INFO,
    format="%(asctime)s %(levelname)s %(name)s: %(message)s",
)
logger = logging.getLogger(__name__)
load_local_env()

app = FastAPI(
    title="Uwekezaji API", description="Stock Market Data API", redirect_slashes=False
)


def _json_safe(value):
    if isinstance(value, bytes):
        return value.decode("utf-8", errors="replace")
    if isinstance(value, dict):
        return {key: _json_safe(item) for key, item in value.items()}
    if isinstance(value, list):
        return [_json_safe(item) for item in value]
    if isinstance(value, tuple):
        return [_json_safe(item) for item in value]
    return value


@app.exception_handler(AppException)
async def custom_http_exception_handler(request: Request, exc: AppException):
    return JSONResponse(
        status_code=exc.status_code,
        content=ResponseModel(
            success=False,
            message=getattr(exc, "message", str(exc.detail)),
            data=getattr(exc, "data", None),
        ).model_dump(),
    )


@app.exception_handler(HTTPException)
async def generic_http_exception_handler(request: Request, exc: HTTPException):
    return JSONResponse(
        status_code=exc.status_code,
        content=ResponseModel(
            success=False,
            message=str(exc.detail),
            data=None,
        ).model_dump(),
    )


@app.exception_handler(RequestValidationError)
async def validation_exception_handler(request: Request, exc: RequestValidationError):
    return JSONResponse(
        status_code=HTTP_400_BAD_REQUEST,
        content=ResponseModel(
            success=False,
            message="Validation error",
            data={"errors": _json_safe(exc.errors())},
        ).model_dump(),
    )


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

app.include_router(stocks_router)
app.include_router(funds_router)
app.include_router(bonds_router)
app.include_router(tasks_router)
app.include_router(users_router)
app.include_router(portfolio_router)
app.include_router(admin_router)
app.include_router(economy_router)
app.include_router(economy_api_router)
app.add_middleware(ProxyHeadersMiddleware, trusted_hosts="*")


@app.on_event("startup")
async def startup_event():
    logger.info("[startup] database initialization started")
    await init_db()
    logger.info("[startup] database initialization complete")
    asyncio.create_task(scheduled_market_loop())
    logger.info("[startup] scheduled market background loop started")
    asyncio.create_task(scheduled_news_loop())
    logger.info("[startup] scheduled news background loop started")
    asyncio.create_task(scheduled_economy_loop())
    logger.info("[startup] economy pipeline loop registered")


@app.on_event("shutdown")
async def shutdown_event():
    await close_db()


@app.get("/")
async def root():
    return {"message": "Welcome to Uwekezaji API"}