from fastapi import APIRouter, Depends, HTTPException, status
from typing import List
from app.core.security import get_current_user, User
from app.services.docker_service import DockerService, ContainerInfo
from app.services.update_service import UpdateService, ImageInfo, ImageUpdate

router = APIRouter()
docker_service = DockerService()
update_service = UpdateService()


@router.get("/status")
async def get_docker_status(current_user: User = Depends(get_current_user)):
    """Vérifie le statut de la connexion Docker"""
    return {
        "connected": docker_service.is_connected(),
        "message": "Docker est accessible" if docker_service.is_connected() else "Docker n'est pas accessible"
    }


@router.get("/containers", response_model=List[ContainerInfo])
async def list_containers(
    all: bool = True,
    current_user: User = Depends(get_current_user)
):
    """Liste tous les conteneurs Docker"""
    if not docker_service.is_connected():
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail="Docker n'est pas accessible"
        )
    return docker_service.get_containers(all=all)


@router.post("/containers/{container_id}/start")
async def start_container(
    container_id: str,
    current_user: User = Depends(get_current_user)
):
    """Démarre un conteneur"""
    if not docker_service.is_connected():
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail="Docker n'est pas accessible"
        )
    
    success = docker_service.start_container(container_id)
    if not success:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="Impossible de démarrer le conteneur"
        )
    
    return {"status": "success", "message": f"Conteneur {container_id} démarré"}


@router.post("/containers/{container_id}/stop")
async def stop_container(
    container_id: str,
    current_user: User = Depends(get_current_user)
):
    """Arrête un conteneur"""
    if not docker_service.is_connected():
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail="Docker n'est pas accessible"
        )
    
    success = docker_service.stop_container(container_id)
    if not success:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="Impossible d'arrêter le conteneur"
        )
    
    return {"status": "success", "message": f"Conteneur {container_id} arrêté"}


@router.post("/containers/{container_id}/restart")
async def restart_container(
    container_id: str,
    current_user: User = Depends(get_current_user)
):
    """Redémarre un conteneur"""
    if not docker_service.is_connected():
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail="Docker n'est pas accessible"
        )
    
    success = docker_service.restart_container(container_id)
    if not success:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="Impossible de redémarrer le conteneur"
        )
    
    return {"status": "success", "message": f"Conteneur {container_id} redémarré"}


@router.delete("/containers/{container_id}")
async def delete_container(
    container_id: str,
    force: bool = False,
    current_user: User = Depends(get_current_user)
):
    """Supprime un conteneur"""
    if not docker_service.is_connected():
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail="Docker n'est pas accessible"
        )
    
    success = docker_service.remove_container(container_id, force=force)
    if not success:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="Impossible de supprimer le conteneur"
        )
    
    return {"status": "success", "message": f"Conteneur {container_id} supprimé"}


# ===== ENDPOINTS DE MISE À JOUR =====


@router.get("/images", response_model=List[ImageInfo])
async def list_images(current_user: User = Depends(get_current_user)):
    """Liste toutes les images Docker locales"""
    if not update_service.is_connected():
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail="Docker n'est pas accessible"
        )
    return update_service.get_all_images_info()


@router.get("/images/check-update/{image_name}")
async def check_image_update(
    image_name: str,
    current_user: User = Depends(get_current_user)
):
    """Vérifie si une image a une mise à jour disponible"""
    if not update_service.is_connected():
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail="Docker n'est pas accessible"
        )
    
    update_info = update_service.check_image_updates(image_name)
    if not update_info:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"Impossible de vérifier les mises à jour pour {image_name}"
        )
    
    return update_info


@router.get("/images/check-all-updates")
async def check_all_updates(current_user: User = Depends(get_current_user)):
    """Vérifie les mises à jour de toutes les images en cours d'utilisation"""
    if not update_service.is_connected():
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail="Docker n'est pas accessible"
        )
    
    try:
        from app.services.docker_service import DockerService
        ds = DockerService()
        containers = ds.get_containers(all=False)  # Conteneurs actifs uniquement
        
        updates = []
        for container in containers:
            image_name = container.image
            update_info = update_service.check_image_updates(image_name)
            if update_info:
                updates.append({
                    "container": container.name,
                    "update": update_info
                })
        
        return {
            "total_containers": len(containers),
            "containers_with_updates": len(updates),
            "updates": updates
        }
    except Exception as e:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=f"Erreur lors de la vérification des mises à jour: {str(e)}"
        )


@router.post("/images/pull")
async def pull_image(
    image: str,
    tag: str = "latest",
    current_user: User = Depends(get_current_user)
):
    """Télécharge une image Docker"""
    if not update_service.is_connected():
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail="Docker n'est pas accessible"
        )
    
    success = update_service.pull_image(image, tag)
    if not success:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=f"Impossible de télécharger l'image {image}:{tag}"
        )
    
    return {
        "status": "success",
        "message": f"Image {image}:{tag} téléchargée avec succès"
    }


@router.post("/containers/{container_id}/update-image")
async def update_container_image(
    container_id: str,
    new_image: str,
    new_tag: str = "latest",
    current_user: User = Depends(get_current_user)
):
    """Met à jour l'image d'un conteneur avec la dernière version
    
    Processus inspiré de TrueNAS Scale:
    1. Arrête le conteneur
    2. Télécharge la nouvelle image
    3. Redémarre le conteneur
    """
    if not update_service.is_connected():
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail="Docker n'est pas accessible"
        )
    
    result = update_service.update_container_image(container_id, new_image, new_tag)
    
    if not result.get("success"):
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=result.get("message", "Erreur lors de la mise à jour")
        )
    
    return result


@router.post("/images/prune")
async def prune_images(
    dangling_only: bool = True,
    current_user: User = Depends(get_current_user)
):
    """Nettoie les images inutilisées (similaire à TrueNAS Scale)"""
    if not update_service.is_connected():
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail="Docker n'est pas accessible"
        )
    
    result = update_service.prune_unused_images(dangling_only=dangling_only)
    
    if not result.get("success"):
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=result.get("message", "Erreur lors du nettoyage")
        )
    
    return result