#
#  Copyright 2025 The InfiniFlow Authors. All Rights Reserved.
#
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License.
#

import secrets
from typing import Any

from common.time_utils import current_timestamp, datetime_format
from datetime import datetime
from flask import Blueprint, Response, request
from flask_login import current_user, login_required, logout_user

from auth import login_verify, login_admin, check_admin_auth
from responses import success_response, error_response
from services import UserMgr, ServiceMgr, UserServiceMgr, SettingsMgr, ConfigMgr, EnvironmentsMgr
from roles import RoleMgr
from api.common.exceptions import AdminException
from common.versions import get_ragflow_version
from api.utils.api_utils import generate_confirmation_token

admin_bp = Blueprint("admin", __name__, url_prefix="/api/v1/admin")


@admin_bp.route("/ping", methods=["GET"])
def ping():
    return success_response("PONG")


@admin_bp.route("/login", methods=["POST"])
def login():
    if not request.json:
        return error_response("Authorize admin failed.", 400)
    try:
        email = request.json.get("email", "")
        password = request.json.get("password", "")
        return login_admin(email, password)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/logout", methods=["GET"])
@login_required
def logout():
    try:
        current_user.access_token = f"INVALID_{secrets.token_hex(16)}"
        current_user.save()
        logout_user()
        return success_response(True)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/auth", methods=["GET"])
@login_verify
def auth_admin():
    try:
        return success_response(None, "Admin is authorized", 0)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/users", methods=["GET"])
@login_required
@check_admin_auth
def list_users():
    try:
        users = UserMgr.get_all_users()
        return success_response(users, "Get all users", 0)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/users", methods=["POST"])
@login_required
@check_admin_auth
def create_user():
    try:
        data = request.get_json()
        if not data or "username" not in data or "password" not in data:
            return error_response("Username and password are required", 400)

        username = data["username"]
        password = data["password"]
        role = data.get("role", "user")

        res = UserMgr.create_user(username, password, role)
        if res["success"]:
            user_info = res["user_info"]
            user_info.pop("password")  # do not return password
            return success_response(user_info, "User created successfully")
        else:
            return error_response("create user failed")

    except AdminException as e:
        return error_response(e.message, e.code)
    except Exception as e:
        return error_response(str(e))


@admin_bp.route("/users/<username>", methods=["DELETE"])
@login_required
@check_admin_auth
def delete_user(username):
    try:
        res = UserMgr.delete_user(username)
        if res["success"]:
            return success_response(None, res["message"])
        else:
            return error_response(res["message"])

    except AdminException as e:
        return error_response(e.message, e.code)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/users/<username>/password", methods=["PUT"])
@login_required
@check_admin_auth
def change_password(username):
    try:
        data = request.get_json()
        if not data or "new_password" not in data:
            return error_response("New password is required", 400)

        new_password = data["new_password"]
        msg = UserMgr.update_user_password(username, new_password)
        return success_response(None, msg)

    except AdminException as e:
        return error_response(e.message, e.code)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/users/<username>/activate", methods=["PUT"])
@login_required
@check_admin_auth
def alter_user_activate_status(username):
    try:
        data = request.get_json()
        if not data or "activate_status" not in data:
            return error_response("Activation status is required", 400)
        activate_status = data["activate_status"]
        msg = UserMgr.update_user_activate_status(username, activate_status)
        return success_response(None, msg)
    except AdminException as e:
        return error_response(e.message, e.code)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/users/<username>/admin", methods=["PUT"])
@login_required
@check_admin_auth
def grant_admin(username):
    try:
        if current_user.email == username:
            return error_response(f"can't grant current user: {username}", 409)
        msg = UserMgr.grant_admin(username)
        return success_response(None, msg)

    except AdminException as e:
        return error_response(e.message, e.code)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/users/<username>/admin", methods=["DELETE"])
@login_required
@check_admin_auth
def revoke_admin(username):
    try:
        if current_user.email == username:
            return error_response(f"can't grant current user: {username}", 409)
        msg = UserMgr.revoke_admin(username)
        return success_response(None, msg)

    except AdminException as e:
        return error_response(e.message, e.code)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/users/<username>", methods=["GET"])
@login_required
@check_admin_auth
def get_user_details(username):
    try:
        user_details = UserMgr.get_user_details(username)
        return success_response(user_details)

    except AdminException as e:
        return error_response(e.message, e.code)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/users/<username>/datasets", methods=["GET"])
@login_required
@check_admin_auth
def get_user_datasets(username):
    try:
        datasets_list = UserServiceMgr.get_user_datasets(username)
        return success_response(datasets_list)

    except AdminException as e:
        return error_response(e.message, e.code)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/users/<username>/agents", methods=["GET"])
@login_required
@check_admin_auth
def get_user_agents(username):
    try:
        agents_list = UserServiceMgr.get_user_agents(username)
        return success_response(agents_list)

    except AdminException as e:
        return error_response(e.message, e.code)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/services", methods=["GET"])
@login_required
@check_admin_auth
def get_services():
    try:
        services = ServiceMgr.get_all_services()
        return success_response(services, "Get all services", 0)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/service_types/<service_type>", methods=["GET"])
@login_required
@check_admin_auth
def get_services_by_type(service_type_str):
    try:
        services = ServiceMgr.get_services_by_type(service_type_str)
        return success_response(services)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/services/<service_id>", methods=["GET"])
@login_required
@check_admin_auth
def get_service(service_id):
    try:
        services = ServiceMgr.get_service_details(service_id)
        return success_response(services)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/services/<service_id>", methods=["DELETE"])
@login_required
@check_admin_auth
def shutdown_service(service_id):
    try:
        services = ServiceMgr.shutdown_service(service_id)
        return success_response(services)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/services/<service_id>", methods=["PUT"])
@login_required
@check_admin_auth
def restart_service(service_id):
    try:
        services = ServiceMgr.restart_service(service_id)
        return success_response(services)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/roles", methods=["POST"])
@login_required
@check_admin_auth
def create_role():
    try:
        data = request.get_json()
        if not data or "role_name" not in data:
            return error_response("Role name is required", 400)
        role_name: str = data["role_name"]
        description: str = data["description"]
        res = RoleMgr.create_role(role_name, description)
        return success_response(res)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/roles/<role_name>", methods=["PUT"])
@login_required
@check_admin_auth
def update_role(role_name: str):
    try:
        data = request.get_json()
        if not data or "description" not in data:
            return error_response("Role description is required", 400)
        description: str = data["description"]
        res = RoleMgr.update_role_description(role_name, description)
        return success_response(res)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/roles/<role_name>", methods=["DELETE"])
@login_required
@check_admin_auth
def delete_role(role_name: str):
    try:
        res = RoleMgr.delete_role(role_name)
        return success_response(res)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/roles", methods=["GET"])
@login_required
@check_admin_auth
def list_roles():
    try:
        res = RoleMgr.list_roles()
        return success_response(res)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/roles/<role_name>/permission", methods=["GET"])
@login_required
@check_admin_auth
def get_role_permission(role_name: str):
    try:
        res = RoleMgr.get_role_permission(role_name)
        return success_response(res)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/roles/<role_name>/permission", methods=["POST"])
@login_required
@check_admin_auth
def grant_role_permission(role_name: str):
    try:
        data = request.get_json()
        if not data or "actions" not in data or "resource" not in data:
            return error_response("Permission is required", 400)
        actions: list = data["actions"]
        resource: str = data["resource"]
        res = RoleMgr.grant_role_permission(role_name, actions, resource)
        return success_response(res)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/roles/<role_name>/permission", methods=["DELETE"])
@login_required
@check_admin_auth
def revoke_role_permission(role_name: str):
    try:
        data = request.get_json()
        if not data or "actions" not in data or "resource" not in data:
            return error_response("Permission is required", 400)
        actions: list = data["actions"]
        resource: str = data["resource"]
        res = RoleMgr.revoke_role_permission(role_name, actions, resource)
        return success_response(res)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/users/<user_name>/role", methods=["PUT"])
@login_required
@check_admin_auth
def update_user_role(user_name: str):
    try:
        data = request.get_json()
        if not data or "role_name" not in data:
            return error_response("Role name is required", 400)
        role_name: str = data["role_name"]
        res = RoleMgr.update_user_role(user_name, role_name)
        return success_response(res)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/users/<user_name>/permission", methods=["GET"])
@login_required
@check_admin_auth
def get_user_permission(user_name: str):
    try:
        res = RoleMgr.get_user_permission(user_name)
        return success_response(res)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/variables", methods=["PUT"])
@login_required
@check_admin_auth
def set_variable():
    try:
        data = request.get_json()
        if not data and "var_name" not in data:
            return error_response("Var name is required", 400)

        if "var_value" not in data:
            return error_response("Var value is required", 400)
        var_name: str = data["var_name"]
        var_value: str = data["var_value"]

        SettingsMgr.update_by_name(var_name, var_value)
        return success_response(None, "Set variable successfully")
    except AdminException as e:
        return error_response(str(e), 400)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/variables", methods=["GET"])
@login_required
@check_admin_auth
def get_variable():
    try:
        if request.content_length is None or request.content_length == 0:
            # list variables
            res = list(SettingsMgr.get_all())
            return success_response(res)

        # get var
        data = request.get_json()
        if not data and "var_name" not in data:
            return error_response("Var name is required", 400)
        var_name: str = data["var_name"]
        res = SettingsMgr.get_by_name(var_name)
        return success_response(res)
    except AdminException as e:
        return error_response(str(e), 400)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/configs", methods=["GET"])
@login_required
@check_admin_auth
def get_config():
    try:
        res = list(ConfigMgr.get_all())
        return success_response(res)
    except AdminException as e:
        return error_response(str(e), 400)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/environments", methods=["GET"])
@login_required
@check_admin_auth
def get_environments():
    try:
        res = list(EnvironmentsMgr.get_all())
        return success_response(res)
    except AdminException as e:
        return error_response(str(e), 400)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/users/<username>/keys", methods=["POST"])
@login_required
@check_admin_auth
def generate_user_api_key(username: str) -> tuple[Response, int]:
    try:
        user_details: list[dict[str, Any]] = UserMgr.get_user_details(username)
        if not user_details:
            return error_response("User not found!", 404)
        tenants: list[dict[str, Any]] = UserServiceMgr.get_user_tenants(username)
        if not tenants:
            return error_response("Tenant not found!", 404)
        tenant_id: str = tenants[0]["tenant_id"]
        key: str = generate_confirmation_token()
        obj: dict[str, Any] = {
            "tenant_id": tenant_id,
            "token": key,
            "beta": generate_confirmation_token().replace("ragflow-", "")[:32],
            "create_time": current_timestamp(),
            "create_date": datetime_format(datetime.now()),
            "update_time": None,
            "update_date": None,
        }

        if not UserMgr.save_api_key(obj):
            return error_response("Failed to generate API key!", 500)
        return success_response(obj, "API key generated successfully")
    except AdminException as e:
        return error_response(e.message, e.code)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/users/<username>/keys", methods=["GET"])
@login_required
@check_admin_auth
def get_user_api_keys(username: str) -> tuple[Response, int]:
    try:
        api_keys: list[dict[str, Any]] = UserMgr.get_user_api_key(username)
        return success_response(api_keys, "Get user API keys")
    except AdminException as e:
        return error_response(e.message, e.code)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/users/<username>/keys/<key>", methods=["DELETE"])
@login_required
@check_admin_auth
def delete_user_api_key(username: str, key: str) -> tuple[Response, int]:
    try:
        deleted = UserMgr.delete_api_key(username, key)
        if deleted:
            return success_response(None, "API key deleted successfully")
        else:
            return error_response("API key not found or could not be deleted", 404)
    except AdminException as e:
        return error_response(e.message, e.code)
    except Exception as e:
        return error_response(str(e), 500)


@admin_bp.route("/version", methods=["GET"])
@login_required
@check_admin_auth
def show_version():
    try:
        res = {"version": get_ragflow_version()}
        return success_response(res)
    except Exception as e:
        return error_response(str(e), 500)