__all__ = ['getobj', 'clear_table', 'dumprow', 'dumpquery', 'template',
    'template_file', 'Storage', 'Form', 'HTTP_REDIRECT', 'HTTP_ERROR',
    'render_template', 'process_error', 'template_out', 'user', 'username',
    'adminuser', 'button_preview_submit_reset', 'button_submit_reset',
    'send_mail']


import os
from simpletemplate import template, template_file
from google.appengine.api import users
from storage import Storage
import Form
from dbutils import *

TEMPLATE_PATH = ['templates']
TEMPLATE_ENV = {}

class HTTP_REDIRECT(Exception): pass
class HTTP_ERROR(Exception):
    def __init__(self, e, error_template='', obj=None):
        self.e = e
        self.obj = obj
        self.error_template = error_template or 'error.html'

    def __str__(self):
        return self.e

def render_template(self, templatefilename, vars=None, env=None):
    vars = vars or {}
    env = env or get_env()
    self.response.out.write(
        template_file(templatefilename, vars, env, dirs=TEMPLATE_PATH)
    )

def process_error(func):
    def f(self):
        try:
            vars = func(self)
        except HTTP_ERROR, e:
            render_template(self, e.error_template, {'message':str(e), 'obj':e.obj, 'link':self.request.path_qs}, get_env())
    return f

def template_out(templatefilename, env=None, error_template='error.html'):
    def _f(func):

        def f(self=None):
            v = env or get_env()
            try:
                vars = func(self)
                render_template(self, templatefilename, vars, v)
            except HTTP_REDIRECT, e:
                self.redirect(str(e))
            except HTTP_ERROR, e:
                render_template(self, e.error_template, {'message':str(e), 'obj':e.obj, 'link':self.request.path_qs}, v)
            except Exception, e:
                import traceback
                traceback.print_exc()
                render_template(self, error_template, {'message':str(e), 'trace':traceback.format_exc(), 'link':self.request.path_qs}, v)
        return f

    return _f

#process GAE user
def user():
    return users.get_current_user()

def adminuser():
    if users.is_current_user_admin():
        adminuser = user
    else:
        adminuser = None
    return adminuser

def username():
    if user():
        username = user().nickname()
    else:
        username = 'Anonymous'
    return username

#buttons
button_preview_submit_reset = Form.Buf()
button_preview_submit_reset << [Form.SubmitInput(name='action', value='Preview'),
        Form.SubmitInput(name='action', value='Submit'),
        Form.ResetInput(value='Reset')]
button_submit_reset = Form.Buf()
button_submit_reset << [Form.SubmitInput(name='action', value='Submit'),
        Form.ResetInput(value='Reset')]

def get_env():
    env = TEMPLATE_ENV.copy()
    from textconvert import text2html
    from rst import to_html
    env['text2html'] = text2html
    env['rst2html'] = to_html
    env['user'] = user()
    env['username'] = username()
    env['adminuser'] = adminuser()
    env['login_url'] = users.create_login_url("/")
    env['logout_url'] = users.create_logout_url("/")
    return env

from google.appengine.api.mail import send_mail