from functools import wraps
from flask import Blueprint, jsonify, abort, request
from flask_login import login_required, current_user
from db.models import database, OrdersPool, Order, OrderAddOn
from db.queries import user_get, domsubusers_list, orders_pool_list, orders_pool

api = Blueprint('api', __name__)

@api.route("/me")
@login_required
def me():
  return jsonify({
    "username": current_user.db_user.telegram_username
  })

@api.route('/subs')
@login_required
def subs():
  return jsonify(
    [
      {
        "sub_username": dsu.sub.telegram_username,
        "telegram_photo_url": dsu.sub.telegram_photo_url
      }
      for dsu
      in domsubusers_list(current_user.db_user)
    ]
  )

def authorized_sub(func):
  @wraps(func)
  def wrapper(*args, **kwargs):
    try:
      sub = user_get(request.view_args['username'])
    except:
      abort(403)
      return
    
    if (sub.id != current_user.db_user.id and
        sub.telegram_username not in [dsu.sub.telegram_username for dsu in domsubusers_list(current_user.db_user)]):
      abort(403)
      return
    
    kwargs['sub'] = sub
    return func(*args, **kwargs)
  return wrapper

@api.route('/orders/')
@login_required
def my_order_sets():
  return jsonify([
   {
      'id': op.id,
      'name': op.name,
      'scheduled': op.scheduled,
      'time': op.time,
      'weekends': op.weekends,
      'weekdays': op.weekdays,
      'orders': [{
        'id': order.id,
      } for order in op.orders]
    }
   for op
   in orders_pool_list(current_user.db_user) 
  ])

@api.route('/orders/<username>/sets')
@login_required
@authorized_sub
def sub_order_sets(username, sub):
  return jsonify([
    {
      'id': op.id,
      'name': op.name,
      'scheduled': op.scheduled,
      'time': op.time,
      'weekends': op.weekends,
      'weekdays': op.weekdays,
      'orders': [{
        'id': order.id,
      } for order in op.orders]
    }
    for op
    in orders_pool_list(sub.id)
  ])

@api.route('/orders/<username>/sets/', methods=['POST'])
@login_required
@authorized_sub
def sub_order_set_create(username, sub):
  # Create new
  with database.atomic() as transaction:
    try:
      new_order_pool = OrdersPool.create(
        user=sub,
        name=request.json['name'],
        scheduled=request.json['scheduled'],
        probability=request.json['probability'] if 'probability' in request.json else None,
        time=request.json['time'] if 'time' in request.json else None,
        weekdays=request.json['weekdays'] if 'weekdays' in request.json else None,
        weekends=request.json['weekends'] if 'weekends' in request.json else None,
        confirm_delay=request.json['confirm_delay'] if 'confirm_delay' in request.json else None,
      )

      for order_to_create in request.json['orders']:
        new_order = Order.create(
          pool=new_order_pool,
          name=order_to_create['name'],
          weight=order_to_create['weight'],
          repeat=order_to_create['repeat']
        )

        for add_on_to_create in order_to_create['add_ons']:
          OrderAddOn.create(
            order=new_order,
            name=add_on_to_create['name'],
            probability=add_on_to_create['probability']
          )
    except:
      transaction.rollback()
      abort(500)

  return jsonify(new_order_pool.to_dict())

@api.route('/orders/<username>/sets/<set_id>', methods = ['GET', 'POST', 'DELETE'])
@login_required
@authorized_sub
def sub_order_set(username, set_id, sub):
  op = orders_pool(sub.id, set_id)

  if request.method == 'POST':
    def update_add_ons(order, add_ons):
      for updated_add_on in add_ons:
        if isinstance(updated_add_on['id'], int):
          add_on_to_update = order.add_ons.where(OrderAddOn.id == updated_add_on['id']).get()

          if '_delete' in updated_add_on:
            add_on_to_update.delete_instance(recursive=True)
          else:
            add_on_to_update.name = updated_add_on['name']
            add_on_to_update.probability = updated_add_on['probability']

            add_on_to_update.save()
        else:
          OrderAddOn.create(
            order=order,
            name=updated_add_on['name'],
            probability=updated_add_on['probability']
          )

    with database.atomic() as transaction:
      try:
        op.name = request.json['name']

        op.scheduled = request.json['scheduled']
        if op.scheduled:
          op.probability = request.json['probability']
          op.weekdays = request.json['weekdays']
          op.weekends = request.json['weekends']
          op.time = request.json['time']
          op.confirm_delay = request.json['confirm_delay']
        else:
          op.probability = None
          op.weekdays = None
          op.weekends = None
          op.time = None
          op.confirm_delay = None

        op.save()

        for updated_order in request.json['orders']:
          if isinstance(updated_order['id'], int):
            order_to_update = op.orders.where(Order.id == updated_order['id']).get()

            if '_delete' in updated_order:
              order_to_update.delete_instance(recursive=True)
            else:
              order_to_update.name = updated_order['name']
              order_to_update.weight = updated_order['weight']
              order_to_update.repeat = updated_order['repeat']

              order_to_update.save()

              update_add_ons(order_to_update, updated_order['add_ons'])
          else:
            order_to_update = Order.create(
              pool=op,
              name=updated_order['name'],
              weight=updated_order['weight'],
              repeat=updated_order['repeat']
            )

            update_add_ons(order_to_update, updated_order['add_ons'])
      except:
        transaction.rollback()
        abort(500)
  elif request.method == 'DELETE':
    op.delete_instance(recursive=True)
    return ('', 204)

  return jsonify(op.to_dict())