from flask import render_template, flash, redirect, session, url_for, request, g, abort
from flask_login import login_user, logout_user, current_user, login_required
from app import app, lm, tools, db
from .forms import LoginForm, RegisterForm, UpdateForm, PwForm, SearchForm, DeleteForm, PortfolioForm, AlbumForm
from .models import User, Portfolio, Album, AccessRight, Role, MyAnonymous
from werkzeug.security import generate_password_hash, check_password_hash
import datetime, os
from config import SESSION_TIMEOUT

class DBException(Exception):
    pass

@app.before_request
def before_request():
    session.permanent = True
    app.permanent_session_lifetime = datetime.timedelta(minutes=SESSION_TIMEOUT)
    session.modified = True
    g.user = current_user
    g.searchForm = SearchForm(prefix="sf")
    g.deleteform = DeleteForm(prefix="df")

@lm.user_loader
def load_user(id):
    return User.query(id=id)[0]

@app.route('/')
@app.route('/index')
def index():
    user = g.user
    return render_template('index.html',
                           title='Home',
                           user=user)

@app.route('/login', methods=['GET', 'POST'])
def login():
    if g.user is not None and g.user.is_authenticated:
        return redirect(request.referrer)#redirect(url_for('index'))
    form = LoginForm()
    if form.validate_on_submit():
        user = User.query(username=form.username.data)[0]
        if user is None:
            flash('Unknown username. Please try again or register.')
        else:
            if check_password_hash(user.password, form.password.data):
                app.logger.info("Login: %s" % user)
                login_user(user, remember=False)
                g.user = user
                user.addObserver(db)
                next = request.args.get('next')
                if next is not None:
                    if not tools.is_safe_url(next):
                        return abort(400)
                    req = next.rsplit('/', 1)
                    app.logger.info("%s:%s" % (req[0], req[1]))
                    if req[0] == '/user' and req[1] != user.name:
                        next = "%s/%s" % (req[0], user.username)
                app.logger.info("Login: %s next: %s" % (user, next))
                return redirect(next or url_for('index'))
            else:
                flash('Username or password is wrong. Please try again')
    return render_template('login.html', 
                           title='Sign In',
                           form=form)

@app.route('/logout')
def logout():
    logout_user()
    return redirect(url_for('index'))

@app.route('/album/<int:id>', methods =['GET', 'DELETE'])
def getAlbum(id):
    if request.method == 'GET':
        return "<h1>Get album # %s</h1>" % id
    else:
        return 'Album #' + str(id) + " deleted"

@app.route('/albums', methods =['GET'])
def getAlbums():
    user = current_user
    app.logger.info("user: %s" % user)
    query = tools.DBQuery()
#    if user.is_anonymous:
#        return "<h1>(au)Get all albums: %s</h1>" % dir(user)
#    else:
    u = load_user(user.get_id())
    if u is None:
        u = MyAnonymous()
        a = query.get_albums_for_user(u)
    else:
        a = query.get_albums_for_user(u, True, True)
    albums = []
    for album in a:
#        if not user.is_anonymous:
        acl = query.get_acl(user, album)
#        else:
#            acl = Role.read
        if acl is not None:
            albums.append({'album': album, 'acl': acl})
        app.logger.info("albums: %s" % a)
        app.logger.info(tools.dump(albums))
    return "<h1>(nu)Get all albums</h1><pre>%s</pre>" % albums

@app.route('/album', methods =['GET', 'POST'])
@login_required
def album():
    user = g.user
    form = AlbumForm(prefix="pf")
    if form.validate_on_submit():
        u = load_user(user.get_id())
        try:
            query = tools.DBQuery()
            portfolios = query.get_portfolios(u)
            new_album = Album(name=form.name.data, public=form.public.data, visible=form.visible.data, portfolio_id=portfolios[0].id)
            db.store(new_album)
            app.logger.warning("Created album: %s" % new_album)
        except DBException as ex:
            flash(ex)
        except Exception as ex:
            flash('Create album failed: %s' % ex)
#        except Exception as ex:
#            flash("Unknown error {0}".format(ex))
        return redirect(request.referrer)
    return render_template('album.html',
                           title='Create Album', 
                           user=user, 
                           form=form)

@app.route('/portfolio/<int:id>', methods =['GET', 'DELETE'])
def getPortfolio(id):
    if request.method == 'GET':
        return "<h1>Get portfolio # %s</h1>" % id
    else:
        return 'Portfolio #' + str(id) + " deleted"

@app.route('/portfolios', methods =['GET'])
def getPortfolios():
    return "<h1>Get all portfolios</h1>"

@app.route('/portfolio', methods =['GET', 'POST'])
@login_required
def portfolio():
    user = g.user
    form = PortfolioForm(prefix="pf")
    if form.validate_on_submit():
        pass
    return render_template('portfolio.html',
                           title='Create Portfolio', 
                           user=user, 
                           form=form)

@app.route('/user/<username>', methods=['GET', 'POST'])
@login_required
def user(username):
    form = UpdateForm(prefix="uf")
    pwform = PwForm(prefix="pf")
    deleteform = g.deleteform
    referrer = request.referrer
    if form.update.data and form.validate_on_submit():
        try:
            uname=form.username.data
            email=form.email.data
            name=form.name.data
            user = User.query(username=username)[0]
            if uname != username:
                u = User.query(username=uname)[0]
                if u is not None:
                    raise DBException("%s: Username exist" % uname)
                user.username = uname
                referrer = "/user/%s" % user.username
            if email != user.email:
                e = User.query(email=email)[0]
                if e is not None:
                    raise DBException("%s: Email exist" % email)
                user.email = email
            if name != user.name:
                user.name = name
        except DBException as ex:
            user.rollback()
            flash("{0}".format(ex))
            app.logger.warning("Update user failed: {0}".format(ex))
        except Exception as ex:
            user.rollback()
            flash("Update user failed: {0}".format(ex))
            app.logger.warning("Update user failed: {0}".format(ex))
#        except Exception as ex:
#            db.rollback()
#            flash("Unknown error {0}".format(ex))
#            app.logger.warning("Update user failed: Unknown error {0}".format(ex))
        else:
            try:
                user.commit()
                login_user(user, remember=False)
                app.logger.warning("Updated user: %s" % user)
                flash("Userdata successfully updated")
            except Exception as ex:
                flash("Update user failed: {0}".format(ex))
#            except Exception as ex:
#                flash("Unknown error {0}".format(ex))
        return redirect(referrer)
    elif pwform.pwchange.data and pwform.validate_on_submit():
        user = User.query(username=username)[0]
        if pwform.password.data == pwform.passwordchk.data and check_password_hash(user.password, pwform.passwordcur.data):
            hashed_password = generate_password_hash(pwform.password.data, method='sha256')
            user.password = hashed_password
            try:
                user.commit()
                login_user(user, remember=False)
                app.logger.warning("Updated user - password: %s" % user)
                flash("Password successfully changed")
            except Exception as ex:
                flash("Update user failed: {0}".format(ex))
#            except Exception as ex:
#                flash("Unknown error {0}".format(ex))
        else:
            flash('Current password does not match or password different from password check')
        return redirect(referrer)
    else:
        user = User.query(username=username)[0]
        if user is None:
            flash('User %s not found.' % username)
            return redirect(url_for('index'))
        app.logger.info("Show profile: %s" % user)
        query = tools.DBQuery()
        portfolios = query.get_portfolios(user)
        app.logger.info("Portfolios: {0}".format(portfolios))
        private = []
        for p in portfolios:
            albums = query.get_albums(p)
            #p.set_user_count(len(query.get_users(p)))
            p.set_user_count(1)
            a1 = []
            for a in albums:
                a.set_user_count(len(query.get_users(a)))
                a1.append(a)
            pf = {'portfolio': p, 'albums': a1}
            private.append(pf)
        a = query.get_albums_for_user(user)
        app.logger.info("Albums: %s" % a)
        albums = []
        for album in a:
            acl = query.get_acl(user, album)
            app.logger.info("Album: %s -> acl: %s" % (album, acl))
            if acl is not None:
                albums.append({'album': album, 'acl': acl})
        return render_template('user.html',
                               title='Profile', 
                               user=user, 
                               form=form, 
                               pwform=pwform,
                               deleteform=deleteform,  
                               private=private, 
                               albums=albums)

@app.route('/register', methods=['GET', 'POST'])
def register():
    form = RegisterForm()
    if form.validate_on_submit():
        if form.password.data == form.passwordchk.data:
            try:
                username=form.username.data
                email=form.email.data
                u = User.query.filter_by(username=username).first()
                if u:
                    raise DBException("%s: Username exist" % username)
                e = User.query.filter_by(email=email).first()
                if e:
                    raise DBException("%s: Email exist" % email)
                hashed_password = generate_password_hash(form.password.data, method='sha256')
                new_user = User(name=form.name.data, username=form.username.data, email=form.email.data, password=hashed_password)
            except DBException as ex:
                flash(ex)
            except Exception as ex:
                flash('Create user failed: %s' % ex)
#            except Exception as ex:
#                flash("Unknown error {0}".format(ex))
            else:
                try:
                    portfolio = Portfolio(name = new_user.name, owner = new_user)
                    #db.session.add(portfolio)
                    new_user.portfolios.append(portfolio)
                    #db.session.add(new_user)
                    acl = AccessRight(right = Role.read, user = new_user)
                    #db.session.add(acl)
                    acl = AccessRight(right = Role.write, user = new_user)
                    #db.session.add(acl)
                    acl = AccessRight(right = Role.admin, user = new_user)
                    #db.session.add(acl)
                    #db.session.commit()
                    app.logger.warning("Registered: %s" % new_user)
                    flash("You have been registered with username: " + form.username.data + os.linesep)
                    flash("Default Portfolio: " + portfolio.name)
                    return redirect(url_for('login'))
                except Exception as ex:
                    flash('Create user failed: %s' % ex)
                except Exception as ex:
                    flash("Unknown error {0}".format(ex))
        else:
            flash('Password did not match password check')
    return render_template('register.html',
                           title='Register',
                           form=form)

@app.route('/resetpwd')
def resetpwd():
    return '<h1>resetpwd</h1>'

@app.route('/search', methods=['POST'])
def search():
    form = g.searchForm
    if form.validate_on_submit():
        token = form.token.data
        flash("Search: " + token)
    return redirect(request.referrer)

@app.route('/admin')
#@login_required
def admin():
    try:
        if g.user is not None and g.user.is_admin:
            app.logger.warning("Enter Admin area: %s" % g.user)
            return render_template('admin.html',
                                    title='Administration')
    except AttributeError:
        pass
    app.logger.critical("Tried to enter Admin area: %s" % g.user)
    return redirect(request.referrer)#redirect(url_for('index'))