from django.db.models import Q, F
from GeoffreyApp.models import *
from GeoffreyApp.errors import *
from GeoffreyApp.minecraft_api import *
import inspect

command_dict = {"GET": {}, "POST": {}, "DELETE": {}}


def objects_list_to_json(obj_list):
    json_list = []

    for obj in obj_list:
        json_list.append(obj.json)

    return json_list


def get_required_args(func):
    args = inspect.getfullargspec(func)

    return args.args + args.kwonlyargs


def command(type):
    def command_dec(func):
        def add_command():
            command_dict[type][func.__name__] = {"func": func, "params": get_required_args(func)}
            return func
        
        return add_command()

    return command_dec


def get_player(discord_uuid=None, mc_uuid=None):
    if discord_uuid is not None:
        player = Player.objects.get(discord_uuid=discord_uuid)
    elif mc_uuid is not None:
        player = Player.objects.get(mc_uuid=discord_uuid)
    else:
        raise AttributeError

    return player


def get_location(owner, name=None, loc_type=Location):
    if name is None:
        if loc_type == Location:
            loc_list = Location.objects.all().filter(owner=owner)
        else:
            loc_list = Location.objects.all().select_related(loc_type.__name__.lower()).filter(owner=owner)
        if len(loc_list) == 1:
            loc = loc_list[0]
        elif len(loc_list) == 0:
            raise NoLocationsInDatabase
        else:
            raise EntryNameNotUniqueError
    else:
        if loc_type == Location:
            loc_list = Location.objects.all().filter(owner=owner)
        else:
            loc_list = Location.objects.all().select_related(loc_type.__name__.lower()).filter(owner=owner)
        if len(loc_list) == 1:
            loc = loc_list[0]
        else:
            raise LocationLookUpError

    return loc


@command("POST")
def register(player_name, discord_uuid):
    mc_uuid = grab_UUID(player_name)
    player = Player.objects.create(name=player_name, mc_uuid=mc_uuid, discord_uuid=discord_uuid)

    return player.json


@command("POST")
def add_base(x_pos, z_pos, name=None, discord_uuid=None, mc_uuid=None):
    return add_location(x_pos, z_pos, name=name, discord_uuid=discord_uuid, mc_uuid=mc_uuid, loc_type=Base)


@command("POST")
def add_shop(x_pos, z_pos, name=None, discord_uuid=None, mc_uuid=None):
    return add_location(x_pos, z_pos, name=name, discord_uuid=discord_uuid, mc_uuid=mc_uuid, loc_type=Shop)


def add_location(x_pos, z_pos, name=None, discord_uuid=None, mc_uuid=None, loc_type=Location):
    player = get_player(discord_uuid, mc_uuid)
    try:
        get_location(player, name, loc_type=loc_type)
        raise EntryNameNotUniqueError
    except (Location.DoesNotExist, NoLocationsInDatabase):
        if name is None:
            name = "{}'s {}".format(player.name, loc_type.__name__)

        if loc_type == Base:
            location = Base.objects.create(owner=player, name=name, x_coord=x_pos, z_coord=z_pos)
        elif loc_type == Shop:
            location = Shop.objects.create(owner=player, name=name, x_coord=x_pos, z_coord=z_pos)
        else:
            raise DataBaseError

    return location


@command("POST")
def add_tunnel(tunnel_direction, tunnel_number, location_name=None, discord_uuid=None, mc_uuid=None):
    player = get_player(discord_uuid, mc_uuid)
    if location_name is None:
        loc = get_location(player, name=location_name)
        location_name = loc.name

    tunnel = Tunnel.objects.create(tunnel_direction=tunnel_direction, tunnel_number=tunnel_number,
                                   location=get_location(player, location_name))

    return tunnel.json


@command("GET")
def find_location(search):
    limit = 25

    locations = Location.objects.filter(Q(name__icontains=search) | Q(owner__name__icontains=search)).all()[:limit]

    if len(locations) == 0:
        raise LocationLookUpError

    return objects_list_to_json(locations)


@command("DELETE")
def delete(name, discord_uuid=None, mc_uuid=None):
    owner = get_player(discord_uuid, mc_uuid)
    Location.objects.get(name__iexact=name, owner=owner).delete()


@command("GET")
def find_around(x_pos, z_pos, radius=200):
    locations = Location.objects.filter(x_coord__range=(x_pos - radius, x_pos + radius),
                                        z_coord__range=(z_pos - radius, z_pos + radius)).all()

    return objects_list_to_json(locations)


@command("POST")
def add_item(item_name, quantity, diamond_price, shop_name=None, discord_uuid=None, mc_uuid=None):
    player = get_player(discord_uuid, mc_uuid)

    shop = get_location(player, shop_name, Shop).shop

    item_listing = ItemListing.objects.create(shop=shop, amount=quantity, price=diamond_price, item_name=item_name)

    return item_listing.json


# TODO Re-implement selling shop search
@command("GET")
def selling(item_name):
        items = []
        if len(item_name) == 0:
            raise EmptryString

        shops = ItemListing.objects.annotate(normalized_price=F('price') / F('amount'))\
            .filter(item_name__icontains=item_name).order_by('normalized_price').values('shop_id').distinct()

        if len(shops) == 0:
            raise ItemNotFound

        for shop_id in shops:
            shop = Shop.objects.get(pk=shop_id['shop_id']).json

            item_query = ItemListing.objects.annotate(normalized_price=F('price') / F('amount')) \
                .filter(item_name__icontains=item_name, shop_id=shop_id['shop_id']) \
                .order_by('normalized_price') \
                .values("item_name", "price", "amount")

            item_list = []
            for item in item_query:
                item_list.append(item)

            shop["items"] = item_list
            items.append(shop)

        return items


@command("GET")
def info(location_name):
    location = Location.objects.get(name__iexact=location_name)

    if location is None:
        location = Location.objects.get(name__iregex="*{}*".format(location_name))

    if location is not None:
        return location.json
    else:
        raise LocationLookUpError


@command("GET")
def tunnel(player_name):
    tunnels = Tunnel.objects.filter(location__owner__name__icontains=player_name).all()

    if len(tunnels) == 0:
        raise LocationLookUpError

    return objects_list_to_json(tunnel)


@command("POST")
def edit_pos(x, z, loc_name, discord_uuid=None, mc_uuid=None):

    player = get_player(discord_uuid=discord_uuid, mc_uuid=mc_uuid)
    location = get_location(player, loc_name)

    location.x_coord = x
    location.z_coord = z
    location.save()

    return location.json


@command("POST")
def edit_tunnel(tunnel_direction, tunnel_number, loc_name, discord_uuid=None, mc_uuid=None):
    player = get_player(discord_uuid=discord_uuid, mc_uuid=mc_uuid)
    location = get_location(player, loc_name)

    if location.tunnel is not None:
        location.tunnel.tunnel_direction = tunnel_direction
        location.tunnel.tunnel_number = tunnel_number
    else:
        Tunnel.objects.create(tunnel_direction=tunnel_direction, tunnel_number=tunnel_number, location=location)

    return location.json


@command("POST")
def edit_name(new_name, loc_name, discord_uuid=None, mc_uuid=None):
    player = get_player(discord_uuid=discord_uuid, mc_uuid=mc_uuid)
    location = get_location(player, loc_name)

    location.name = new_name
    location.save()

    return location.json


@command("DELETE")
def delete_item(item, shop_name, discord_uuid=None, mc_uuid=None):
    player = get_player(discord_uuid=discord_uuid, mc_uuid=mc_uuid)

    shop = get_location(player, shop_name, Shop)

    ItemListing.objects.filter(item_name__iexact=item, shop=shop).delete()

    return shop.json


@command("GET")
def me(discord_uuid=None, mc_uuid=None):
    player = get_player(discord_uuid=discord_uuid, mc_uuid=mc_uuid)

    locations = Location.objects.filter(owner=player).all()

    if len(locations) == 0:
        raise PlayerNotFound

    return objects_list_to_json(locations)