from uuid import UUID, uuid4
from app.security.permissions import check_investigation_permission
from fastapi import APIRouter, HTTPException, Depends, status
from typing import List
from datetime import datetime
from sqlalchemy import or_
from sqlalchemy.orm import Session
from flowsint_core.core.postgre_db import get_db
from flowsint_core.core.models import Analysis, Profile, InvestigationUserRole
from flowsint_core.core.types import Role
from app.api.deps import get_current_user
from app.api.schemas.analysis import AnalysisRead, AnalysisCreate, AnalysisUpdate

router = APIRouter()


# Get the list of all analyses for the current user
@router.get("", response_model=List[AnalysisRead])
def get_analyses(
    db: Session = Depends(get_db), current_user: Profile = Depends(get_current_user)
):
    # Get all analyses from investigations where user has at least VIEWER role
    allowed_roles_for_read = [Role.OWNER, Role.EDITOR, Role.VIEWER]

    query = db.query(Analysis).join(
        InvestigationUserRole,
        InvestigationUserRole.investigation_id == Analysis.investigation_id,
    )

    query = query.filter(InvestigationUserRole.user_id == current_user.id)

    # Filter by allowed roles
    conditions = [InvestigationUserRole.roles.any(role) for role in allowed_roles_for_read]
    query = query.filter(or_(*conditions))

    return query.distinct().all()


# Create a New analysis
@router.post(
    "/create", response_model=AnalysisRead, status_code=status.HTTP_201_CREATED
)
def create_analysis(
    payload: AnalysisCreate,
    db: Session = Depends(get_db),
    current_user: Profile = Depends(get_current_user),
):
    check_investigation_permission(
        current_user.id, payload.investigation_id, actions=["create"], db=db
    )
    new_analysis = Analysis(
        id=uuid4(),
        title=payload.title,
        description=payload.description,
        content=payload.content,
        owner_id=current_user.id,
        investigation_id=payload.investigation_id,
        created_at=datetime.utcnow(),
        last_updated_at=datetime.utcnow(),
    )
    db.add(new_analysis)
    db.commit()
    db.refresh(new_analysis)
    return new_analysis


# Get an analysis by ID
@router.get("/{analysis_id}", response_model=AnalysisRead)
def get_analysis_by_id(
    analysis_id: UUID,
    db: Session = Depends(get_db),
    current_user: Profile = Depends(get_current_user),
):
    analysis = (
        db.query(Analysis)
        .filter(Analysis.id == analysis_id)
        .first()
    )
    if not analysis:
        raise HTTPException(status_code=404, detail="Analysis not found")
    check_investigation_permission(
        current_user.id, analysis.investigation_id, actions=["read"], db=db
    )
    return analysis


# Get analyses by investigation ID
@router.get("/investigation/{investigation_id}", response_model=List[AnalysisRead])
def get_analyses_by_investigation(
    investigation_id: UUID,
    db: Session = Depends(get_db),
    current_user: Profile = Depends(get_current_user),
):
    check_investigation_permission(
        current_user.id, investigation_id, actions=["read"], db=db
    )
    analyses = (
        db.query(Analysis)
        .filter(Analysis.investigation_id == investigation_id)
        .all()
    )
    return analyses


# Update an analysis by ID
@router.put("/{analysis_id}", response_model=AnalysisRead)
def update_analysis(
    analysis_id: UUID,
    payload: AnalysisUpdate,
    db: Session = Depends(get_db),
    current_user: Profile = Depends(get_current_user),
):
    analysis = (
        db.query(Analysis)
        .filter(Analysis.id == analysis_id)
        .first()
    )
    if not analysis:
        raise HTTPException(status_code=404, detail="Analysis not found")
    check_investigation_permission(
        current_user.id, analysis.investigation_id, actions=["update"], db=db
    )
    if payload.title is not None:
        analysis.title = payload.title
    if payload.description is not None:
        analysis.description = payload.description
    if payload.content is not None:
        analysis.content = payload.content
    if payload.investigation_id is not None:
        # Check permission for the new investigation as well
        check_investigation_permission(
            current_user.id, payload.investigation_id, actions=["update"], db=db
        )
        analysis.investigation_id = payload.investigation_id
    analysis.last_updated_at = datetime.utcnow()
    db.commit()
    db.refresh(analysis)
    return analysis


# Delete an analysis by ID
@router.delete("/{analysis_id}", status_code=status.HTTP_204_NO_CONTENT)
def delete_analysis(
    analysis_id: UUID,
    db: Session = Depends(get_db),
    current_user: Profile = Depends(get_current_user),
):
    analysis = (
        db.query(Analysis)
        .filter(Analysis.id == analysis_id)
        .first()
    )
    if not analysis:
        raise HTTPException(status_code=404, detail="Analysis not found")
    check_investigation_permission(
        current_user.id, analysis.investigation_id, actions=["delete"], db=db
    )
    db.delete(analysis)
    db.commit()
    return None