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

api = Blueprint('api', __name__)

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

@api.route('/subs/<username>/sets')
def sub_order_sets(username):
  try:
    sub = user_get(username)
  except:
    abort(403)
    return
  
  if sub.telegram_username not in [dsu.sub.telegram_username for dsu in domsubusers_list(current_user.db_user)]:
    abort(403)
    return
  
  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('/subs/<username>/sets/<set_id>', methods = ['GET', 'POST'])
def sub_order_set(username, set_id):
  try:
    sub = user_get(username)
  except:
    abort(403)
    return
  
  if sub.telegram_username not in [dsu.sub.telegram_username for dsu in domsubusers_list(current_user.db_user)]:
    abort(403)
    return

  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)

  return jsonify(
    {
      'id': op.id,
      'name': op.name,
      'scheduled': op.scheduled,
      'probability': op.probability,
      'weekdays': op.weekdays,
      'weekends': op.weekends,
      'time': op.time,
      'confirm_delay': op.confirm_delay,
      'orders': [{
        'id': order.id,
        'name': order.name,
        'weight': order.weight,
        'repeat': order.repeat,
        'add_ons': [
          {
            'id': add_on.id,
            'name': add_on.name,
            'probability': add_on.probability 
          } for add_on in order.add_ons
        ]
      } for order in op.orders]
    }
  )