from database import db
from areas.apps import App, AppRole, AppsService
from areas.roles import Role, RoleService
from helpers import KratosApi

from flask import current_app

from helpers.error_handler import KratosError


class UserService:
    @staticmethod
    def get_users():
        res = KratosApi.get("/admin/identities").json()
        userList = []
        for r in res:
            userList.append(UserService.__insertAppRoleToUser(r["id"], r))

        return userList

    @staticmethod
    def get_user(id):
        res = KratosApi.get("/admin/identities/{}".format(id)).json()
        return UserService.__insertAppRoleToUser(id, res)

    @staticmethod
    def post_user(data):
        kratos_data = {
            "schema_id": "default",
            "traits": {"email": data["email"], "name": data["name"]},
        }
        res = KratosApi.post("/admin/identities", kratos_data).json()

        if data["app_roles"]:
            app_roles = data["app_roles"]
            for ar in app_roles:
                app = App.query.filter_by(slug=ar["name"]).first()
                app_role = AppRole(
                    user_id=res["id"],
                    role_id=ar["role_id"] if "role_id" in ar else Role.NO_ACCESS_ROLE_ID,
                    app_id=app.id,
                )

                db.session.add(app_role)
            db.session.commit()
        else:
            all_apps = AppsService.get_all_apps()
            for app in all_apps:
                app_role = AppRole(
                    user_id=res["id"],
                    role_id=Role.NO_ACCESS_ROLE_ID,
                    app_id=app.id,
                )

                db.session.add(app_role)
            db.session.commit()

        return UserService.get_user(res["id"])

    @staticmethod
    def put_user(id, user_editing_id, data):
        kratos_data = {
            "schema_id": "default",
            "traits": {"email": data["email"], "name": data["name"]},
        }
        KratosApi.put("/admin/identities/{}".format(id), kratos_data)

        is_admin = RoleService.is_user_admin(user_editing_id)

        if is_admin and data["app_roles"]:
            app_roles = data["app_roles"]
            for ar in app_roles:
                app = App.query.filter_by(slug=ar["name"]).first()
                app_role = AppRole.query.filter_by(
                    user_id=id, app_id=app.id).first()

                if app_role:
                    app_role.role_id = ar["role_id"] if "role_id" in ar else None
                    db.session.commit()
                else:
                    appRole = AppRole(
                        user_id=id,
                        role_id=ar["role_id"] if "role_id" in ar else None,
                        app_id=app.id,
                    )
                    db.session.add(appRole)
                    db.session.commit()

        return UserService.get_user(id)

    @staticmethod
    def delete_user(id):
        app_role = AppRole.query.filter_by(user_id=id).all()
        for ar in app_role:
            db.session.delete(ar)
        db.session.commit()

    @staticmethod
    def post_multiple_users(data):
        # check if data is array
        # for every item in array call Kratos
        created_users = []
        existing_users = []
        creation_failed_users = []

        for user_data in data['users']:
            user_email = user_data["email"]
            if not user_email:
                return
            try:
                UserService.post_user(user_data)
                current_app.logger.info(f"Batch create user: {user_email}")
                created_users.append(user_email)
            except KratosError as err:
                status_code = err.args[1]
                if status_code == 409:
                    existing_users.append(user_email)
                elif status_code == 400:
                    creation_failed_users.append(user_email)
                current_app.logger.error(
                    f"Exception calling Kratos: {err} on creating user: {user_email} {status_code}")
            except Exception as error:
                current_app.logger.error(
                    f"Exception: {error} on creating user: {user_email}")
                creation_failed_users.append(user_email)

        success_response = {}
        existing_response = {}
        failed_response = {}
        if created_users:
            success_response = {"users": created_users,
                                "message": f"{len(created_users)} users created"}
        if existing_users:
            existing_response = {
                "users": existing_users, "message": f"{len(existing_users)} users already exist: {', '.join(existing_users)}"}
        if creation_failed_users:
            failed_response = {"users": creation_failed_users,
                               "message": f"{len(creation_failed_users)} users failed to create: {', '.join(creation_failed_users)}"}

        return {"success": success_response, "existing": existing_response, "failed": failed_response}

    @staticmethod
    def __insertAppRoleToUser(userId, userRes):
        apps = App.query.all()
        app_roles = []
        for app in apps:
            tmp_app_role = AppRole.query.filter_by(
                user_id=userId, app_id=app.id
            ).first()
            app_roles.append(
                {
                    "name": app.slug,
                    "role_id": tmp_app_role.role_id if tmp_app_role else None,
                }
            )

        userRes["traits"]["app_roles"] = app_roles
        return userRes