"""Gestion des permissions et accès par rôle."""
"""Gestion des permissions et accès par rôle."""
from functools import wraps
from flask import abort, current_app
from flask_login import current_user
import os


class Permission:
    """Définition des permissions de l'application."""
    
    # Permissions de base
    VIEW_DASHBOARD = 'dashboard:view'
    CREATE_INTERVENTION = 'intervention:create'
    VIEW_INTERVENTIONS = 'intervention:view'
    EDIT_INTERVENTIONS = 'intervention:edit'
    DELETE_INTERVENTIONS = 'intervention:delete'
    
    # Permissions équipements
    VIEW_EQUIPMENTS = 'equipment:view'
    CREATE_EQUIPMENTS = 'equipment:create'
    EDIT_EQUIPMENTS = 'equipment:edit'
    DELETE_EQUIPMENTS = 'equipment:delete'
    
    # Permissions planning
    VIEW_PLANNING = 'planning:view'
    CREATE_PLANNING = 'planning:create'
    EDIT_PLANNING = 'planning:edit'
    
    # Permissions ENT
    VIEW_ENT = 'ent:view'
    CONFIG_ENT = 'ent:config'
    MANAGE_ENT_MESSAGES = 'ent:manage'
    
    # Permissions administratives
    VIEW_USERS = 'user:view'
    CREATE_USERS = 'user:create'
    EDIT_USERS = 'user:edit'
    DELETE_USERS = 'user:delete'
    VIEW_ADMIN = 'admin:view'
    
    # Permission de modification du code (admin seulement)
    EDIT_CODE = 'code:edit'
    
    # Permissions entreprises et pièces
    VIEW_COMPANIES = 'company:view'
    CREATE_COMPANIES = 'company:create'
    EDIT_COMPANIES = 'company:edit'
    DELETE_COMPANIES = 'company:delete'
    
    VIEW_PARTS = 'part:view'
    CREATE_PARTS = 'part:create'
    EDIT_PARTS = 'part:edit'
    DELETE_PARTS = 'part:delete'


class RolePermission:
    """Définition des permissions par rôle."""
    
    # Rôle administrateur (accès à tout)
    ADMIN = {
        Permission.VIEW_DASHBOARD,
        Permission.CREATE_INTERVENTION,
        Permission.VIEW_INTERVENTIONS,
        Permission.EDIT_INTERVENTIONS,
        Permission.DELETE_INTERVENTIONS,
        Permission.VIEW_EQUIPMENTS,
        Permission.CREATE_EQUIPMENTS,
        Permission.EDIT_EQUIPMENTS,
        Permission.DELETE_EQUIPMENTS,
        Permission.VIEW_PLANNING,
        Permission.CREATE_PLANNING,
        Permission.EDIT_PLANNING,
        Permission.VIEW_ENT,
        Permission.CONFIG_ENT,
        Permission.MANAGE_ENT_MESSAGES,
        Permission.VIEW_USERS,
        Permission.CREATE_USERS,
        Permission.EDIT_USERS,
        Permission.DELETE_USERS,
        Permission.VIEW_ADMIN,
        Permission.VIEW_COMPANIES,
        Permission.CREATE_COMPANIES,
        Permission.EDIT_COMPANIES,
        Permission.DELETE_COMPANIES,
        Permission.VIEW_PARTS,
        Permission.CREATE_PARTS,
        Permission.EDIT_PARTS,
        Permission.DELETE_PARTS,
        Permission.EDIT_CODE,  # Permission de modification du code
    }
    
    # Rôle technicien (peut voir et gérer les interventions, voir les équipements)
    TECHNICIAN = {
        Permission.VIEW_DASHBOARD,
        Permission.CREATE_INTERVENTION,
        Permission.VIEW_INTERVENTIONS,
        Permission.EDIT_INTERVENTIONS,
        Permission.VIEW_EQUIPMENTS,
        Permission.VIEW_PLANNING,
        Permission.VIEW_ENT,
    }
    
    # Rôle chef d'établissement (peut voir et gérer les interventions, planning, voir les données)
    CHEF = {
        Permission.VIEW_DASHBOARD,
        Permission.CREATE_INTERVENTION,
        Permission.VIEW_INTERVENTIONS,
        Permission.EDIT_INTERVENTIONS,
        Permission.VIEW_EQUIPMENTS,
        Permission.VIEW_PLANNING,
        Permission.CREATE_PLANNING,
        Permission.VIEW_ENT,
    }
    
    # Rôle demandeur (peut voir le dashboard, créer des interventions, voir les équipements)
    DEMANDEUR = {
        Permission.VIEW_DASHBOARD,
        Permission.CREATE_INTERVENTION,
        Permission.VIEW_INTERVENTIONS,
        Permission.VIEW_EQUIPMENTS,
        Permission.VIEW_PLANNING,
    }


def get_role_permissions(role):
    """Retourne les permissions pour un rôle donné."""
    role_permissions_map = {
        'admin': RolePermission.ADMIN,
        'technicien': RolePermission.TECHNICIAN,
        'chef': RolePermission.CHEF,
        'demandeur': RolePermission.DEMANDEUR,
    }
    return role_permissions_map.get(role, set())


def permission_required(permission):
    """Décorateur pour vérifier une permission spécifique."""
    def decorator(f):
        @wraps(f)
        def decorated_function(*args, **kwargs):
            if not current_user.is_authenticated:
                abort(401)
            
            if current_user.role == 'admin':
                return f(*args, **kwargs)
            
            user_permissions = get_role_permissions(current_user.role)
            
            if permission not in user_permissions:
                current_app.logger.warning(
                    f"User {current_user.username} (role: {current_user.role}) "
                    f"tried to access {permission} which is not allowed"
                )
                abort(403)
            
            return f(*args, **kwargs)
        return decorated_function
    return decorator


def any_permission_required(*permissions):
    """Décorateur pour vérifier qu'au moins une permission parmi les listées est présente."""
    def decorator(f):
        @wraps(f)
        def decorated_function(*args, **kwargs):
            if not current_user.is_authenticated:
                abort(401)
            
            if current_user.role == 'admin':
                return f(*args, **kwargs)
            
            user_permissions = get_role_permissions(current_user.role)
            
            # Vérifier si l'utilisateur a au moins une des permissions requises
            has_permission = any(perm in user_permissions for perm in permissions)
            
            if not has_permission:
                current_app.logger.warning(
                    f"User {current_user.username} (role: {current_user.role}) "
                    f"tried to access {permissions} but none are allowed"
                )
                abort(403)
            
            return f(*args, **kwargs)
        return decorated_function
    return decorator


def role_required(role):
    """Décorateur pour vérifier le rôle exact."""
    def decorator(f):
        @wraps(f)
        def decorated_function(*args, **kwargs):
            if not current_user.is_authenticated:
                abort(401)
            
            if current_user.role != role:
                current_app.logger.warning(
                    f"User {current_user.username} (role: {current_user.role}) "
                    f"tried to access endpoint requiring {role} role"
                )
                abort(403)
            
            return f(*args, **kwargs)
        return decorated_function
    return decorator


def has_permission(permission):
    """Macro template pour vérifier une permission dans les templates."""
    if not current_user.is_authenticated:
        return False
    
    if current_user.role == 'admin':
        return True
    
    user_permissions = get_role_permissions(current_user.role)
    return permission in user_permissions


def get_user_permissions(user=None):
    """Retourne les permissions d'un utilisateur (ou de l'utilisateur courant)."""
    if user is None:
        if not current_user.is_authenticated:
            return set()
        user = current_user
    
    if user.role == 'admin':
        return RolePermission.ADMIN
    
    return get_role_permissions(user.role)