from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.orm import Session

from typing import List
from app.database import get_db
from app import models, schemas
from app.auth import (
    get_password_hash,
    verify_password,
    get_current_user,
)

router = APIRouter(tags=["user"])

@router.post("/auth/register", response_model=schemas.UserResponse, status_code=status.HTTP_201_CREATED)
def register(user: schemas.UserCreate, db: Session = Depends(get_db)):
    db_user = db.query(models.User).filter(models.User.username == user.username).first()
    if db_user:
        raise HTTPException(status_code=400, detail="Username already registered")
    
    db_email = db.query(models.User).filter(models.User.email == user.email).first()
    if db_email:
        raise HTTPException(status_code=400, detail="Email already registered")
    
    hashed_password = get_password_hash(user.password)
    db_user = models.User(
        username=user.username,
        email=user.email,
        hashed_password=hashed_password,
        role=models.UserRole.USER
    )
    db.add(db_user)
    db.commit()
    db.refresh(db_user)
    return db_user

@router.post("/auth/login", response_model=schemas.UserResponse)
def login(credentials: schemas.UserLogin, db: Session = Depends(get_db)):
    user = db.query(models.User).filter(models.User.username == credentials.username).first()
    if not user:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Incorrect username or password"
        )
    if not verify_password(credentials.password, str(user.hashed_password)):
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Incorrect username or password"
        )
    
    return user

@router.get("/user/me", response_model=schemas.UserResponse)
def get_current_user_info(current_user: models.User = Depends(get_current_user)):
    return current_user

@router.post("/user/health-issues", response_model=schemas.HealthIssueResponse, status_code=status.HTTP_201_CREATED)
def add_health_issue(
    health_issue: schemas.HealthIssueCreate,
    current_user: models.User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    db_health_issue = models.HealthIssue(
        user_id=current_user.id,
        **health_issue.dict()
    )
    db.add(db_health_issue)
    db.commit()
    db.refresh(db_health_issue)
    return db_health_issue

@router.get("/user/health-issues", response_model=List[schemas.HealthIssueResponse])
def get_health_issues(
    current_user: models.User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    return db.query(models.HealthIssue).filter(models.HealthIssue.user_id == current_user.id).all()

@router.delete("/user/health-issues/{issue_id}", status_code=status.HTTP_204_NO_CONTENT)
def delete_health_issue(
    issue_id: int,
    current_user: models.User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    health_issue = db.query(models.HealthIssue).filter(
        models.HealthIssue.id == issue_id,
        models.HealthIssue.user_id == current_user.id
    ).first()
    if not health_issue:
        raise HTTPException(status_code=404, detail="Health issue not found")
    db.delete(health_issue)
    db.commit()
    return None