import logging

from simplejson import dumps
from formencode.api import Invalid
from restmarks.lib.base import *

log = logging.getLogger(__name__)

class UsersController(BaseController):
    """REST Controller styled on the Atom Publishing Protocol"""
    # To properly map this controller, ensure your config/routing.py file has
    # a resource setup:
    #     map.resource('user', 'users')

    def index(self, format='html'):
        """GET /users: All items in the collection.<br>
            @param format the format passed from the URI.
        """
        #url_for('users')
        users = model.User.select()
        if format=='json':
            data = []
            for user in users:
                d = user._state['original'].data
                del d['password']
                d['link'] = h.url_for('user', id=user.name)
                data.append(d)
            response.headers['content-type'] = 'text/javascript'
            return dumps(data)
        else:
            c.users = users
            return render('/users/index_user.mako')

    def create(self):
        """POST /users: Create a new item."""
        # url_for('users')
        user = model.User.get_by(name=request.params['name'])
        if user:
            # The client tried to create a user that already exists
            abort(409, '409 Conflict', headers=[('location', h.url_for('user', id=user.name)), ])
        else:
            try:
                # Validate the data that was sent to us
                params = model.forms.UserForm.to_python(request.params)
            except Invalid, e:
                # Something didn't validate correctly
                abort(400, '400 Bad Request -- '+str(e))
            user = model.User(**params)
            model.objectstore.flush()
            response.headers['location'] = h.url_for('user', id=user.name)
            response.status_code = 201
            c.user_name = user.name
            return render('/users/created_user.mako')

    def new(self, format='html'):
        """GET /users/new: Form to create a new item.
            @param format the format passed from the URI.
        """
        # url_for('new_user')
        return render('/users/new_user.mako')

    def update(self, id):
        """PUT /users/id: Update an existing item.
            @param id the id (name) of the user to be updated
        """
        # Forms posted to this method should contain a hidden field:
        #    <input type="hidden" name="_method" value="PUT" />
        # Or using helpers:
        #    h.form(h.url_for('user', id=ID),
        #           method='put')
        # url_for('user', id=ID)
        old_name = id
        new_name = request.params['name']
        user = model.User.get_by(name=id)

        if user:
            if (old_name != new_name) and model.User.get_by(name=new_name):
                abort(409, '409 Conflict')
            else:
                params = model.forms.UserForm.to_python(request.params)
                user.name = params['name']
                user.full_name = params['full_name']
                user.email = params['email']
                user.password = params['password']
                model.objectstore.flush()
                if user.name != old_name:
                    abort(301, '301 Moved Permanently',
                          [('Location', h.url_for('users', id=user.name)),])
                else:
                    return ''

    def delete(self, id):
        """DELETE /users/id: Delete an existing item.
            @param id the id (name) of the user to be updated
        """
        # Forms posted to this method should contain a hidden field:
        #    <input type="hidden" name="_method" value="DELETE" />
        # Or using helpers:
        #    h.form(h.url_for('user', id=ID),
        #           method='delete')
        # url_for('user', id=ID)
        user = model.User.get_by(name=id)
        user.delete()
        model.objectstore.flush()
        return ''

    def show(self, id, format='html'):
        """GET /users/id: Show a specific item.
            @param id the id (name) of the user to be updated.
            @param format the format of the URI requested.
        """
        # url_for('user', id=ID)
        user = model.User.get_by(name=id)
        if user:
            if format=='json':
                data = user._state['original'].data
                del data['password']
                data['link'] = h.url_for('user', id=user.name)
                response.headers['content-type'] = 'text/javascript'
                return dumps(data)
            else:
                c.data = user
                return render('/users/show_user.mako')
        else:
            abort(404, '404 Not Found')

    def edit(self, id, format='html'):
        """GET /users/id;edit: Form to edit an existing item.
            @param id the id (name) of the user to be updated.
            @param format the format of the URI requested.
        """
        # url_for('edit_user', id=ID)
        user = model.User.get_by(name=id)
        if not user:
            abort(404, '404 Not Found')
        # Get the form values from the table
        c.values = model.forms.UserForm.from_python(user.__dict__)
        return render('/users/edit_user.mako')