from functools import wraps
from flask import request, render_template, url_for
from flask import redirect as _redirect

def _gen_tpl(endpoint):
    return endpoint.replace('.', '/') + '.jinja'

def templated(template=None):
    def decorator(f):
        @wraps(f)
        def decorated_function(*args, **kwargs):
            if template is None:
                template_name = _gen_tpl(request.endpoint)
            elif template[0] == '.' and request.blueprint is not None:
                template_name = _gen_tpl(request.blueprint + template)
            else:
                template_name = template

            ctx = f(*args, **kwargs)
            if ctx is None:
                ctx = {}
            elif not isinstance(ctx, dict):
                return ctx
            return render_template(template_name, **ctx)
        return decorated_function
    return decorator

def redirect (target, **kwargs):
    code = kwargs.pop("_code", None)
    url = url_for(target, **kwargs)

    if code is None:
        return _redirect(url)
    else:
        return _redirect(url, code)