from flask import (
    abort,
    current_app,
    Flask,
    jsonify,
    redirect,
    render_template,
    request,
    send_from_directory,
    url_for
)
from flask_login import current_user, login_required, logout_user
from threading import Thread
from app import db
from app.models import Avatar, User
from . import bp


@bp.route('')
@login_required
def index():
    return redirect(url_for('main.social_area', _anchor='users'))


@bp.route('/<hashid:user_id>')
@login_required
def user(user_id: int):
    user = User.query.get_or_404(user_id)

    if not (
        user.is_public
        or user == current_user
        or current_user.is_administrator
    ):
        abort(403)

    accept_json = request.accept_mimetypes.accept_json
    accept_html = request.accept_mimetypes.accept_html

    if accept_json and not accept_html:
        return user.to_json_serializeable(
            backrefs=True,
            relationships=True
        )

    return render_template(
        'users/user.html.j2',
        title=user.username,
        user=user
    )


def _delete_user(app: Flask, user_id: int):
    with app.app_context():
        user = User.query.get(user_id)
        user.delete()
        db.session.commit()


@bp.route('/<hashid:user_id>', methods=['DELETE'])
@login_required
def delete_user(user_id: int):
    user = User.query.get_or_404(user_id)

    if not (
        user == current_user
        or current_user.is_administrator
    ):
        abort(403)

    if user == current_user:
        logout_user()

    thread = Thread(
        target=_delete_user,
        args=(current_app._get_current_object(), user.id)
    )
    thread.start()

    return jsonify(f'User "{user.username}" marked for deletion'), 202


@bp.route('/<hashid:user_id>/avatar')
@login_required
def user_avatar(user_id: int):
    user = User.query.get_or_404(user_id)

    if not (
        user.is_public
        or user == current_user
        or current_user.is_administrator
    ):
        abort(403)

    if user.avatar is None:
        return redirect(url_for('static', filename='images/user_avatar.png'))

    return send_from_directory(
        user.avatar.path.parent,
        user.avatar.path.name,
        as_attachment=True,
        download_name=user.avatar.filename,
        mimetype=user.avatar.mimetype
    )


def _delete_avatar(app: Flask, avatar_id: int):
    with app.app_context():
        avatar = Avatar.query.get(avatar_id)
        avatar.delete()
        db.session.commit()


@bp.route('/<hashid:user_id>/avatar', methods=['DELETE'])
@login_required
def delete_user_avatar(user_id: int):
    user = User.query.get_or_404(user_id)

    if user.avatar is None:
        abort(409)

    if not (
        user == current_user
        or current_user.is_administrator
    ):
        abort(403)

    thread = Thread(
        target=_delete_avatar,
        args=(current_app._get_current_object(), user.avatar.id)
    )
    thread.start()

    return jsonify('Avatar marked for deletion'), 202


# TODO: Move this to main blueprint(?)
@bp.route('/accept-terms-of-use', methods=['POST'])
@login_required
def accept_terms_of_use():
    if not (
        current_user.is_authenticated
        or current_user.confirmed
    ):
        abort(403)

    current_user.terms_of_use_accepted = True
    db.session.commit()

    return jsonify('You accepted the terms of use'), 202