# coding=utf-8

__author__ = 'marcos'

from django.contrib.contenttypes.models import ContentType
from rapid.forms import getDocumentTemplateForm
from rapid.models import DocumentTemplate
from rapid.views import bare_or_main, ListView, ReadView, UpdateView, CreateView, SelectView, DeleteView,\
    update_form_class, RenderDocumentView, add_form_class, get_delete_document_template_view
from rapid.registry import Action, MenuEntry, registry


def _rvw(view_class, action_name):
    view_class.action_name = action_name

    # noinspection PyShadowingNames
    def vw(model):
        return bare_or_main(view_class.as_view(model=model))
    return vw


def _un_none(v):
    if v is None:
        return []
    else:
        return [v]


_crud_actions = [
    (False, Action("list", "", [], _rvw(ListView, 'list'), "listar", "fa-list")),
    (False, Action("view", "(?P<pk>[0-9]+)", ['pk'], _rvw(ReadView, 'view'), "ver", "fa-eye")),
    (True, Action("edit", "(?P<pk>[0-9]+)", ['pk'], _rvw(UpdateView, 'edit'), "editar", "fa-pencil")),
    (True, Action("add", "", [], _rvw(CreateView, 'add'), "adicionar", "fa-plus")),
    (False, Action("select", "", [], _rvw(SelectView, 'select'), "selecionar", "fa-hand-o-up",
                   visibility=Action.Visibility.hidden)),
]


# noinspection PyShadowingNames
def crud(model, read_set, write_set, actions=None, url_name=None, can_erase=False):
    if actions:
        actions = [(edt, a) for edt, a in _crud_actions if a.name in actions]
    else:
        actions = _crud_actions
    ret = []
    for edt, a in actions:
        if edt:
            ret.append(registry.register_action(a, MenuEntry(model, write_set, url_name=url_name)))
        else:
            ret.append(registry.register_action(a, MenuEntry(model, read_set, url_name=url_name)))
    if can_erase:
        a = Action("delete", "(?P<pk>[0-9]+)", ['pk'], _rvw(DeleteView, 'delete'), "apagar", "fa-trash-o")
        ret.append(registry.register_action(a, MenuEntry(model, write_set, url_name=url_name)))
    return [u for u in ret if u]

# noinspection PyShadowingNames
def instance_form(model, action_name, entry_name, form, permission_set,
                  url_name=None, icon=None, visibility=None):
    if not icon:
        icon = ''
    a = Action(action_name, "(?P<pk>[0-9]+)", ['pk'], _rvw(update_form_class(form), action_name),
               entry_name, icon, visibility)
    u = registry.register_action(a, MenuEntry(model, permission_set, url_name=url_name))
    return _un_none(u)


# noinspection PyShadowingNames
def select(model, visible_fields, permission_set, url_name=None):
    class Vw(SelectView):
        fields = visible_fields
    a = Action("select", "", [], _rvw(Vw, 'select'), "selecionar", "fa-hand-o-up",
               visibility=Action.Visibility.hidden)
    u = registry.register_action(a, MenuEntry(model, permission_set, url_name=url_name))
    return _un_none(u)


# noinspection PyShadowingNames
def custom_action(model, action, permission, url_name=None):
    u = registry.register_action(action, MenuEntry(model, permission, url_name))
    return _un_none(u)


# noinspection PyShadowingNames
def document_templates(model, templates_permission, render_permission, url_name=None,
                       render_visibility=Action.Visibility.details):
    ct_model = ContentType.objects.get_for_model(model)
    template_generator = lambda n: lambda: ((d.name, [(n, d.pk),],) for
                                  d in DocumentTemplate.objects.filter(model=ct_model))
    model_class = model  # renamimg because of clash with the next function argument
    add_act = Action("add-template", "", (), _rvw(add_form_class(getDocumentTemplateForm(model)), 'add-template'),
                     "Novo Template", "fa-upload")
    del_act = Action("del-template", "(?P<pk>[0-9]+)", (),
                     _rvw(get_delete_document_template_view(model), 'del-template'), "Excluir Template",
                     'fa-trash-o', pick_generator=template_generator('pk'))
    render_act = Action("render-template", "(?P<pk>[0-9]+)/(?P<template>[0-9]+)", ('pk',),
                        RenderDocumentView.as_view,
                        "Gerar Documento", 'fa-file-word-o', render_visibility,
                        pick_generator=template_generator('template'),
                        overlay=Action.Overlay.clear_overlays)
    add_r = registry.register_action(add_act, MenuEntry(model, templates_permission, url_name=url_name))
    del_r = registry.register_action(del_act, MenuEntry(model, templates_permission, url_name=url_name))
    render_r = registry.register_action(render_act, MenuEntry(model, render_permission, url_name=url_name))
    return _un_none(add_r) + _un_none(del_r) + _un_none(render_r)