from fastapi import FastAPI, File, UploadFile, Form, Depends, HTTPException, status
from fastapi.middleware.cors import CORSMiddleware
from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
from sqlalchemy.orm import Session, joinedload
from sqlalchemy import func, case
from typing import List, Optional
import os
import boto3
from botocore.client import Config
import uuid
from app.core import config as app_config
from app.core.database import engine, get_db, Base
from app.core.security import verify_password, get_password_hash, create_access_token, decode_access_token
from app import models, schemas
import shutil
from datetime import datetime, timedelta

BACKEND_VERSION = "1.0.25"
app = FastAPI(title="Checklist Inteligente API", version=BACKEND_VERSION)

# S3/MinIO configuration
S3_ENDPOINT = app_config.MINIO_ENDPOINT
S3_ACCESS_KEY = app_config.MINIO_ACCESS_KEY
S3_SECRET_KEY = app_config.MINIO_SECRET_KEY
S3_IMAGE_BUCKET = app_config.MINIO_IMAGE_BUCKET
S3_PDF_BUCKET = app_config.MINIO_PDF_BUCKET

s3_client = boto3.client(
    's3',
    endpoint_url=S3_ENDPOINT,
    aws_access_key_id=S3_ACCESS_KEY,
    aws_secret_access_key=S3_SECRET_KEY,
    config=Config(signature_version='s3v4'),
    region_name='us-east-1'
)

# Crear tablas
Base.metadata.create_all(bind=engine)

# Información visual al iniciar el backend
print("\n================ BACKEND STARTUP INFO ================")
print(f"Backend version: {BACKEND_VERSION}")
print(f"Database URL: {app_config.settings.DATABASE_URL}")
print(f"Environment: {app_config.settings.ENVIRONMENT}")
print(f"MinIO endpoint: {app_config.MINIO_ENDPOINT}")
print("====================================================\n", flush=True)

# CORS
app.add_middleware(
    CORSMiddleware,
    allow_origins=["http://localhost:5173", "http://localhost:3000"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# Simulación de modelos y autenticación para ejemplo
class User:
    def __init__(self, role):
        self.role = role

class AIConfiguration:
    is_active = True
    logo_url = ""

class models:
    User = User
    AIConfiguration = AIConfiguration

# Simulación de get_db y get_current_user

def get_db():
    # Aquí iría la lógica real de SQLAlchemy
    class DummyDB:
        def query(self, model):
            return self
        def filter(self, *args, **kwargs):
            return self
        def first(self):
            return models.AIConfiguration()
        def commit(self):
            pass
        def refresh(self, obj):
            pass
    return DummyDB()

def get_current_user():
    # Aquí iría la lógica real de autenticación
    return models.User(role="admin")

# Endpoint para subir el logo
@app.post("/api/config/logo", response_model=dict)
async def upload_logo(
    file: UploadFile = File(...),
    db: Session = Depends(get_db),
    current_user: models.User = Depends(get_current_user)
):
    if current_user.role != "admin":
        raise HTTPException(status_code=403, detail="Solo administradores pueden cambiar el logo")
    # Subir imagen a MinIO/S3
    file_extension = file.filename.split(".")[-1]
    now = datetime.now()
    folder = "logo"
    file_name = f"logo_{now.strftime('%Y%m%d_%H%M%S')}.{file_extension}"
    s3_key = f"{folder}/{file_name}"
    # s3_client.upload_fileobj(file.file, S3_IMAGE_BUCKET, s3_key, ExtraArgs={"ContentType": file.content_type})
    logo_url = f"https://minio.example.com/bucket/{s3_key}"  # Ajusta según tu config
    # Actualiza la configuración en la base de datos
    # config = db.query(models.AIConfiguration).filter(models.AIConfiguration.is_active == True).first()
    # if config:
    #     config.logo_url = logo_url
    #     db.commit()
    return {"logo_url": logo_url}

# Endpoint para obtener el logo
@app.get("/api/config/logo", response_model=dict)
def get_logo_url(db: Session = Depends(get_db)):
    # config = db.query(models.AIConfiguration).filter(models.AIConfiguration.is_active == True).first()
    # if config and getattr(config, "logo_url", None):
    #     return {"logo_url": config.logo_url}
    # return {"logo_url": "https://minio.example.com/bucket/logo/default_logo.png"}
    return {"logo_url": "https://minio.example.com/bucket/logo/default_logo.png"}