from flask import Blueprint, render_template, redirect, url_for, request, make_response
from flask_login import login_required, current_user
from models import db
from models import User, ListOfItems, Item, Shared
from log import Log
from auth import create_cookie

lists_bp = Blueprint("lists", __name__)

def not_current_user(current_user_id):
    result = []
    users = User.query.all()
    for user in users:
        if user.id != current_user_id and not user.is_admin:
            result.append(user)
    return result

@lists_bp.route("/")
@login_required
def home():
    resp = make_response(render_template("lists_show.html", user=current_user, ilists=current_user.all_my_lists(),
                                        button_top_url1 = url_for("auth.change_pwd"),
                                        button_top_txt1 = "add",))
    resp.set_cookie('username', create_cookie(current_user.id))
    return resp

@lists_bp.route("/lists_edit", methods=["GET", "POST"])
@login_required
def edit():
    newlist = ListOfItems(name="")

    if request.method == "POST":
        if "iid" in request.form:
            ilist_id = int(request.form["iid"])
            newname = request.form["name"]
            double = False
            for d in ListOfItems.query.filter_by(owner_user_id=current_user.id, name=newname).all():
                if not d.id == ilist_id:
                    # there is a duplicate name
                    double = True
            if double:
                return render_template("lists_edit.html", user=current_user, ilists=current_user.my_owned_lists(with_inactive=True), newlist=newlist, error_id=ilist_id)

            # if id already exists, overwrite the existing list, else create a new one
            ilist = ListOfItems.query.get(ilist_id)
            if ilist:
                # exists: delete OR overwrite shared data, activate data and update
                if "to_be_deleted" in request.form:
                    # remove all items connected tothis list
                    Log.info(f'User {current_user.id} deleted list {ilist.id} and all its items')
                    for item in Item.query.filter_by(listofitems_id=ilist.id).all():
                        db.session.delete(item)
                    db.session.delete(ilist)
                else:
                    # update name
                    ilist.name = newname
                    # update active
                    ilist.is_active = True if "is_active" in request.form else False
                    # sharing. there may be 0 or more chacboces named "sharing_<n>" where <N> is the user.id
                    # first, remoe all the existing shares
                    for s in Shared.query.filter_by(listofitem_id=ilist_id).all():
                        db.session.delete(s)
                    # and then rebuild them
                    for u in not_current_user(current_user.id):
                        if f"shares_{u.id}" in request.form:
                            shared1 = Shared(user_id=u.id, listofitem_id=ilist_id)
                            db.session.add(shared1)
                    
        else:
            # must be a new list
            newlist = ListOfItems(name=request.form["name"], owner_user_id=current_user.id)
            # check if name exists
            duplicate = ListOfItems.query.filter_by(owner_user_id=current_user.id, name=request.form["name"]).first()
            if duplicate:
                # there is a duplicate name
                return render_template("lists_edit.html", user=current_user, ilists=current_user.my_owned_lists(with_inactive=True), newlist=newlist, error_id=9999)

            newlist.is_active = True
            newlist.owner_user_id = current_user.id
            db.session.add(newlist)
        db.session.commit()
        return home()

    
    resp = make_response(render_template("lists_edit.html", user=current_user, 
                           ilists=current_user.my_owned_lists(with_inactive=True), 
                           users=not_current_user(current_user.id), 
                           newlist=newlist))
    resp.set_cookie('username', create_cookie(current_user.id))
    return resp