from flask import g, request, redirect, render_template, url_for, flash, \
    session, get_flashed_messages, abort
from flask.ext.login import login_required, login_user, logout_user, \
     current_user
from urlparse import urlparse
from sqlalchemy import and_
from datetime import datetime
import uuid

from app import app, db
from models import User, Group, Member, Pad, Session
from forms import CreateGroup, DeleteForm, ChangeGroup, CreatePad, ChangePad, \
    LoginForm
from utils.login import auth
from utils.viewdecorators import templated
from utils.request import after_this_request
from utils.filters import *
import utils.pagination


@app.route('/login', methods=['GET', 'POST'])
@templated()
def login():
    form = LoginForm()
    if form.validate_on_submit():
        user = auth(app.config['LDAP'], User,
                    form.user.data, form.password.data)

        if user is not None:
            user.last_login = datetime.now()
            db.session.commit()
            login_user(user)
            db.session.commit()

            session['uuid'] = unicode(uuid.uuid4())
            return form.redirect('index')

        flash('Wrong user or password')

    return dict(form=form)


@app.route('/logout', methods=['GET'])
def logout():
    logout_user()
    if 'uuid' in session:
        Session.query.filter(Session.uuid == session['uuid']).delete()
        del session['uuid']
    return redirect(url_for('index'))


@app.route('/', methods=['GET', 'POST'])
@templated()
@login_required
def index():
    form = CreateGroup(request.form)
    if form.validate_on_submit():
        group = Group()
        form.populate_obj(group)
        db.session.add(group)
        form = CreateGroup()

        Member.create(user=current_user, group=group,
                      admin=True, active=True)
        db.session.commit()

    memberships = Member.query.filter(
        Member.user == current_user,
        Member.active == True,
    ).all()

    groups = sorted([member.group for member in memberships],
                    key=(lambda group: group.name))
    return dict(groups=groups, create_form=form)


@app.route('/_browse/', defaults={'page': 1})
@app.route('/_browse/<int:page>')
@templated()
@login_required
def browse(page):
    public_groups = Group.query.filter(
        Group.browsable == True,
    ).order_by(Group.name)

    pageination = public_groups.paginate(page, 10)
    return {'groups': pageination.items,
            'count': pageination.total,
            'pagination': pageination,
            'breadcrumbs': [{'text': 'Public groups'}]}


@app.route('/<group_name>/_delete/', methods=['GET', 'POST'])
@templated()
@login_required
def group_delete(group_name):
    group = Group.query.filter(
        Group.name == group_name,
        Group.members.any(and_(Member.user == current_user,
                               Member.admin == True,
                               Member.active == True)),
    ).first_or_404()

    form = DeleteForm(request.form)
    if form.validate_on_submit():
        if form.sure.data == 'yes':
            db.session.delete(group)
            db.session.commit()
        return redirect(url_for('index'))
    return {'group': group,
            'delete_form': form,
            'breadcrumbs': [{'href': url_for('group', group_name=group.name),
                             'text': group},
                            {'text': 'Delete group'}]}


@app.route('/<group_name>/_change/', methods=['GET', 'POST'])
@templated()
@login_required
def group_change(group_name):
    group = Group.query.filter(
        Group.name == group_name,
        Group.members.any(and_(Member.user == current_user,
                               Member.admin == True,
                               Member.active == True)),
    ).first_or_404()

    form = ChangeGroup(request.form, obj=group)
    if form.validate_on_submit():
        del form.name
        form.populate_obj(group)
        db.session.commit()
        return redirect(url_for('group', group_name=group.name))

    return {'group': group,
            'change_form': form,
            'breadcrumbs': [{'href': url_for('group', group_name=group.name),
                             'text': group},
                            {'text': 'Edit group'}]}


@app.route('/<group_name>/_join/<int:member_id>/<accept>/')
@login_required
def group_join(group_name, member_id, accept):
    group = Group.query.filter(
        Group.name == group_name,
        Group.members.any(and_(Member.user == current_user,
                               Member.admin == True,
                               Member.active == True)),
    ).first_or_404()

    member = Member.query.filter(
        Member.id == member_id,
        Member.group == group,
        Member.active == False,
    ).first_or_404()

    if accept == 'yes':
        member.active = True
        db.session.commit()
    elif accept == 'no':
        db.session.delete(member)
        db.session.commit()

    return redirect(url_for('group', group_name=group_name))


@app.route('/<group_name>/_create_pad/', methods=['GET', 'POST'])
@templated('pad_change.html')
@login_required
def pad_create(group_name):
    group = Group.query.filter(
        Group.name == group_name,
        Group.members.any(and_(Member.user == current_user,
                               Member.admin == True,
                               Member.active == True)),
    ).first_or_404()

    form = CreatePad(request.form, group=group)
    if form.validate_on_submit():
        pad = Pad()
        form.populate_obj(pad)
        pad.group = group
        db.session.add(pad)
        db.session.commit()
        return redirect(url_for('group', group_name = group_name))

    return {'group': group,
            'change_form': form,
            'breadcrumbs': [{'href': url_for('group', group_name=group.name),
                             'text': group},
                            {'text': 'Create pad'}]}


@app.route('/<group_name>/<pad_name>/_edit/', methods=['GET', 'POST'])
@templated()
@login_required
def pad_change(group_name, pad_name):
    group = Group.query.filter(
        Group.name == group_name,
        Group.members.any(and_(Member.user == current_user,
                               Member.admin == True,
                               Member.active == True)),
    ).first_or_404()

    pad = Pad.query.filter(
        Pad.name == pad_name,
        Pad.group == group,
    ).first_or_404()

    form = ChangePad(request.form, obj=pad)
    if form.validate_on_submit():
        del form.name
        form.populate_obj(pad)
        db.session.commit()
        return redirect(url_for('group', group_name=group.name))

    return {'group': group,
            'pad': pad,
            'change_form': form,
            'breadcrumbs': [{'href': url_for('group', group_name=group.name),
                             'text': group},
                            {'text': 'Edit pad: %s' % pad.name}]}

@app.route('/<group_name>/<pad_name>/_delete/', methods=['GET', 'POST'])
@templated()
@login_required
def pad_delete(group_name, pad_name):
    group = Group.query.filter(
        Group.name == group_name,
        Group.members.any(and_(Member.user == current_user,
                               Member.admin == True,
                               Member.active == True)),
    ).first_or_404()

    pad = Pad.query.filter(
        Pad.name == pad_name,
        Pad.group == group,
    ).first_or_404()

    form = DeleteForm(request.form)
    if form.validate_on_submit():
        if form.sure.data == 'yes':
            db.session.delete(pad)
            db.session.commit()
        return redirect(url_for('group', group_name=group.name))

    return {'group': group,
            'pad': pad,
            'delete_form': form,
            'breadcrumbs': [{'href': url_for('group', group_name=group.name),
                             'text': group},
                            {'text': 'Delete pad: %s' % pad.name}]}


@app.route('/<group_name>/<pad_name>/')
@templated()
@login_required
def pad(group_name, pad_name):
    group = Group.query.filter(
        Group.name == group_name,
    ).first_or_404()

    member = Member.query.filter(
        Member.group == group,
        Member.user == current_user,
        Member.active == True,
    ).first()

    if member is None:
        if not group.public:
            abort(404)

        flash('You are not member of this group. You may request membership.')
        return redirect(url_for('public_group', group_name = group.name))

    pad = Pad.query.filter(
        Pad.name == pad_name,
        Pad.group == group,
    ).first()

    if pad is None:
        if not member.admin:
            abort(404)

        flash('Pad "%s" not found.' % pad_name)
        return redirect(url_for('group', group_name = group_name))

    api_session = Session.query.filter(
        Session.group == group,
        Session.user == current_user,
        Session.uuid == session['uuid'],
    ).first()

    if api_session is None or not api_session.is_valid():
        if api_session:
            db.session.delete(api_session)

        Session.create(user=current_user, group=group, uuid=session['uuid'])
        db.session.commit()

    sessions = Session.query.filter(
        Session.user == current_user,
        Session.uuid == session['uuid'],
    ).all()

    @after_this_request
    def set_session(response):
        response.set_cookie('sessionID' ,
                            '%2C'.join([s.api_id for s in sessions]))

    # ignore user logged in messages
    get_flashed_messages()
    return {'pad': pad,
            'host': 'https://%s' % urlparse(request.url).hostname}


@app.route('/<group_name>/', methods=['GET', 'POST'])
@templated()
@login_required
def group(group_name):
    group = Group.query.filter(
        Group.name == group_name,
    ).first_or_404()

    membership = Member.query.filter(
        Member.user == current_user,
        Member.group == group,
    ).first()

    if membership is None and request.method == 'POST':
        membership = Member.create(user=current_user, group=group)
        db.session.commit()

    breadcrumbs = [{'text': group}]
    if group.browsable and (membership is None or not membership.active):
        breadcrumbs.insert(0, {'text': 'Public groups',
                               'href': url_for('browse')})

    return {'group': group,
            'membership': membership,
            'pads': group.pads,
            'members': group.members,
            'breadcrumbs': breadcrumbs}