import deform

from pyramid.httpexceptions import HTTPFound
from pyramid.view import view_config

from ordr.events import ChangeEmailNotification
from ordr.models.account import TokenSubject


@view_config(
    context='ordr.resources.account.AccountResource',
    permission='edit'
    )
def account(context, request):
    ''' redirect if '/account' was requested directly '''
    return HTTPFound(request.resource_url(request.root))


@view_config(
    context='ordr.resources.account.AccountResource',
    permission='edit',
    name='settings',
    request_method='GET',
    renderer='ordr:templates/account/settings_form.jinja2'
    )
def settings_form(context, request):
    ''' show the settings form '''
    prefill = {
        'username': request.user.username,
        'first_name': request.user.first_name,
        'last_name': request.user.last_name,
        'email': request.user.email,
        }
    form = context.get_settings_form(prefill=prefill)
    return {'form': form}


@view_config(
    context='ordr.resources.account.AccountResource',
    permission='edit',
    name='settings',
    request_method='POST',
    renderer='ordr:templates/account/settings_form.jinja2'
    )
def settings_form_processing(context, request):
    ''' process the settings form '''
    if 'change' not in request.POST:
        return HTTPFound(request.resource_url(request.root))

    form = context.get_settings_form()
    data = request.POST.items()
    try:
        appstruct = form.validate(data)
    except deform.ValidationFailure as e:
        return {'form': form}

    # form validation successfull, change user
    request.user.first_name = appstruct['first_name']
    request.user.last_name = appstruct['last_name']

    if appstruct['email'] == request.user.email:
        # email was not changed
        return HTTPFound(request.resource_url(request.root))

    # create a verify-new-email token and send email
    token = request.user.issue_token(
        request,
        TokenSubject.CHANGE_EMAIL,
        payload={'email': appstruct['email']}
        )
    notification = ChangeEmailNotification(
        request,
        account,
        {'token': token},
        send_to=appstruct['email']
        )
    request.registry.notify(notification)

    return HTTPFound(request.resource_url(context, 'verify'))


@view_config(
    context='ordr.resources.account.ChangeEmailTokenResource',
    permission='edit',
    request_method='GET',
    renderer='ordr:templates/account/settings_mail_changed.jinja2'
    )
def verify_email(context, request):
    ''' show email verification text '''
    payload = context.model.payload
    request.user.email = payload['email']
    request.dbsession.delete(context.model)
    return {}


@view_config(
    context='ordr.resources.account.AccountResource',
    permission='edit',
    name='password',
    request_method='GET',
    renderer='ordr:templates/account/password_form.jinja2'
    )
def password_form(context, request):
    ''' show the change password form '''
    form = context.get_password_form()
    return {'form': form}


@view_config(
    context='ordr.resources.account.AccountResource',
    permission='edit',
    name='password',
    request_method='POST',
    renderer='ordr:templates/account/password_form.jinja2'
    )
def password_form_processing(context, request):
    ''' process the change password form '''
    if 'change' not in request.POST:
        return HTTPFound(request.resource_url(request.root))

    form = context.get_password_form()
    data = request.POST.items()
    try:
        appstruct = form.validate(data)
    except deform.ValidationFailure as e:
        return {'form': form}

    # form validation successfull, change the password
    request.user.set_password(appstruct['password'])
    return HTTPFound(request.resource_url(context, 'changed'))


@view_config(
    context='ordr.resources.account.AccountResource',
    permission='edit',
    name='changed',
    request_method='GET',
    renderer='ordr:templates/account/password_changed.jinja2'
    )
def password_changed(context, request):
    ''' the password changed message '''
    return {}