from flask import render_template, current_app, url_for, redirect, request
from flask_wtf.csrf import CSRFError
import werkzeug.exceptions as werkzeug_exceptions

import atat.domain.exceptions as exceptions
from atat.domain.invitations import (
    InvitationError,
    ExpiredError as InvitationExpiredError,
    WrongUserError as InvitationWrongUserError,
)
from atat.domain.authnid.crl import CRLInvalidException
from atat.domain.portfolios import PortfolioError
from atat.utils.flash import formatted_flash as flash
from atat.utils.localization import translate

NO_NOTIFY_STATUS_CODES = set([404, 401])


def log_error(e):
    error_message = e.message if hasattr(e, "message") else str(e)
    current_app.logger.exception(error_message)


def notify(e, message, code):
    if code not in NO_NOTIFY_STATUS_CODES:
        current_app.notification_sender.send(message)


def handle_error(e, message=translate("errors.not_found"), code=404):
    log_error(e)
    notify(e, message, code)
    return (render_template("error.html", message=message, code=code), code)


def make_error_pages(app):
    @app.errorhandler(werkzeug_exceptions.NotFound)
    @app.errorhandler(exceptions.NotFoundError)
    @app.errorhandler(exceptions.UnauthorizedError)
    @app.errorhandler(PortfolioError)
    @app.errorhandler(exceptions.NoAccessError)
    # pylint: disable=unused-variable
    def not_found(e):
        return handle_error(e)

    @app.errorhandler(CRLInvalidException)
    # pylint: disable=unused-variable
    def missing_crl(e):
        return handle_error(e, message="Error Code 008", code=401)

    @app.errorhandler(exceptions.UnauthenticatedError)
    # pylint: disable=unused-variable
    def unauthorized(e):
        return handle_error(e, message="Log in Failed", code=401)

    @app.errorhandler(CSRFError)
    # pylint: disable=unused-variable
    def session_expired(e):
        log_error(e)
        url_args = {"next": request.path}
        flash("session_expired")
        if request.method == "POST":
            url_args[app.form_cache.PARAM_NAME] = app.form_cache.write(request.form)
        return redirect(url_for("atat.root", **url_args))

    @app.errorhandler(Exception)
    # pylint: disable=unused-variable
    def exception(e):
        if current_app.debug:
            raise e
        return handle_error(e, message="An Unexpected Error Occurred", code=500)

    @app.errorhandler(InvitationError)
    @app.errorhandler(InvitationWrongUserError)
    # pylint: disable=unused-variable
    def invalid_invitation(e):
        return handle_error(e, message="The link you followed is invalid.", code=404)

    @app.errorhandler(InvitationExpiredError)
    # pylint: disable=unused-variable
    def invalid_invitation(e):
        return handle_error(
            e, message="The invitation you followed has expired.", code=404
        )

    return app