from django.db import models
from django.conf import settings
from django.urls import reverse
from sys import maxsize
import datetime
import enum

from GeoffreyApp.util import create_token, objects_list_to_json


# Create your models here.

class PermissionLevel(enum.Enum):
    ADMIN = enum.auto()
    MOD = enum.auto()
    PLAYER = enum.auto()


class APIToken(models.Model):
    key = models.CharField(default=create_token, max_length=25, unique=True)
    """
    Key used to access the Geoffrey API
    """

    name = models.CharField(max_length=50, blank=True)
    """
    Name of the key
    """

    commands_perm = models.BooleanField(default=False)
    """
    Permission to use the command api
    """

    mod_commands_perm = models.BooleanField(default=False)
    """
    Permission to use mod commands
    """
    admin_commands_perm = models.BooleanField(default=False)
    """
    Permission to use admin commands
    """

    model_api_perm = models.BooleanField(default=False)
    """
    Permission to access the model api
    """

    def has_command_permission(self, permission_level):
        if permission_level == PermissionLevel.ADMIN:
            return self.admin_commands_perm
        elif permission_level == PermissionLevel.MOD:
            return self.admin_commands_perm
        elif permission_level == PermissionLevel.PLAYER:
            return self.commands_perm
        else:
            return False

    def __str__(self):
        if len(self.name):
            return "{}: {}".format(self.name, self.key)
        else:
            return self.key


class Player(models.Model):
    """
    Model of a Player
    """

    name = models.CharField(max_length=30, unique=True)
    """
    In Game Username
    """

    mc_uuid = models.CharField(max_length=36, unique=True)
    """
    Minecraft UUID
    """

    discord_uuid = models.CharField(max_length=50, unique=True, blank=True)
    """
    Discord UUID
    """

    @property
    def loc_count(self):
        """
        Number of locations the player is an owner of
        """
        return Location.objects.filter(owner=self).count()

    @property
    def json(self):
        """
        JSON representation of the Player

        .. code-block:: json

            {
                "name" : "self.name",
                "mc_uuid": "self.mc_uuid",
                "discord_uuid": "self.discord_uuid",
            }
        """

        return {"name": self.name,
                "mc_uuid": self.mc_uuid,
                "discord_uuid": self.discord_uuid
                }

    @property
    def link(self):
        """
        href to the player page
        """
        return reverse("GeoffreyPlayerInfo", kwargs={"id": self.id})

    def __str__(self):
        return self.name


class Location(models.Model):
    """Model of a Location"""

    info_page = None
    """
    Name of the info page view
    """

    DIMENSIONS = (
        ('O', 'Overworld'),
        ('N', 'Nether'),
        ('E', 'The End')
    )
    """
    Possible dimensions for a location to be in
    """

    name = models.CharField(max_length=128, unique=True)
    """
    Name of the location
    """

    x_coord = models.IntegerField()
    """
    X Position
    """

    z_coord = models.IntegerField()
    """
    Z Position
    """

    dimension = models.CharField(max_length=1, choices=DIMENSIONS)
    """
    Dimension of Location
    """

    owner = models.ManyToManyField(Player)
    """
    Owner of Location
    """

    @property
    def position(self):
        """
        Formatted position of the location
        """
        return "(x={}, z={})".format(self.x_coord, self.z_coord)

    @property
    def tunnel(self):
        """
        The tunnel associated if this location, None if no tunnel exists
        """
        try:
            tunnel = Tunnel.objects.get(location=self)
        except Tunnel.DoesNotExist:
            tunnel = None

        return tunnel

    @property
    def get_owners(self):
        """
        List of all the owners of the location
        """
        owner_list = []
        for owner in self.owner.all():
            owner_list.append(owner.json)

        return owner_list

    @property
    def json(self):
        """
        JSON representation of the location

        .. code-block:: json

            {
                "type": "Base",
                "name": "Location",
                "x_coord": 0,
                "z_coord": 0,
                "dimension": "O",
                "owner": [],
                "tunnel": {},
                "link": "/GeoffreyApp/Base/1"
            }
        """
        return {"type": self.loc_type,
                "name": self.name,
                "x_coord": self.x_coord,
                "z_coord": self.z_coord,
                "dimension": self.dimension,
                "owner": self.get_owners,
                "location": self.position,
                "tunnel": None if self.tunnel is None else self.tunnel.tunnel_str,
                "link": self.link
                }

    @property
    def loc_type(self):
        """
        The name of the location type
        """
        str = self.loc_child_obj.__class__.__name__

        return str

    @property
    def link(self):
        """
        href to the location page
        """
        child = self.loc_child_obj

        if child is not self:
            return reverse(child.info_page, kwargs={"id": child.id})
        else:
            return reverse(self.info_page, kwargs={"id": self.id})

    @property
    def loc_child_obj(self):
        """
        Child object
        """
        if hasattr(self, "shop"):
            return self.shop
        elif hasattr(self, "base"):
            return self.base
        elif hasattr(self, "town"):
            return self.town
        elif hasattr(self, "publicfarm"):
            return self.publicfarm
        elif hasattr(self, "market"):
            return self.market
        elif hasattr(self, "attraction"):
            return self.attraction
        elif hasattr(self, "pointofinterest"):
            return self.pointofinterest
        else:
            return self

    @property
    def dynmap_url(self):
        """
        Link to the location on the dynmap, none if there is no dynmap
        """

        base_url = getattr(settings, "GEOFFREY_DYNMAP_BASE_URL")
        world_name = getattr(settings, "GEOFFREY_DYNMAP_WORLD_NAME")
        if base_url:
            url = base_url + "/?worldname={}&mapname=surface&zoom=4&x={}&y=65&z={}".format(world_name, self.x_coord,
                                                                                           self.z_coord)
            return url
        else:
            return None

    def __str__(self):
        return "%s: %s" % (self.loc_child_obj.__class__.__name__, self.name)


class PointOfInterest(Location):
    info_page = "GeoffreyPointOfInterestInfo"


class Shop(Location):
    info_page = "GeoffreyShopInfo"


class Base(Location):
    info_page = "GeoffreyBaseInfo"


class Town(Location):
    info_page = "GeoffreyTownInfo"

    residents = models.ManyToManyField(Player)
    """
    Players who are members of the town
    """

    @property
    def get_residents(self):
        """
        List of residents in the town in JSON farm
        """

        residents = self.residents.all()

        return objects_list_to_json(residents)

    @property
    def json(self):
        """
        JSON representation of the town

        .. code-block:: json

            {
                "type": "Town",
                "name": "Location",
                "x_coord": 0,
                "z_coord": 0,
                "dimension": "O",
                "owner": [],
                "tunnel": {},
                "link": "/GeoffreyApp/Town/1",
                "residents": []
            }
        """

        json = super().json

        json["residents"] = self.get_residents

        return json


class Market(Location):
    info_page = "GeoffreyMarketInfo"

    def get_shops(self, market_radius=100, limit=10):
        x = int(self.x_coord)
        z = int(self.z_coord)
        shops = Shop.objects.filter(x_coord__range=(x - market_radius, x + market_radius),
                                    z_coord__range=(z - market_radius, z + market_radius)
                                    )[:limit]

        return shops

    @property
    def json(self):
        """
        JSON representation of the market

        .. code-block:: json

            {
                "type": "Market",
                "name": "Location",
                "x_coord": 0,
                "z_coord": 0,
                "dimension": "O",
                "owner": [],
                "tunnel": {},
                "link": "/GeoffreyApp/Market/1",
                "shops": []
            }
        """

        json = super().json

        json["shops"] = objects_list_to_json(self.get_shops(limit=10))

        return json


class PublicFarm(Location):
    info_page = "GeoffreyPublicFarmInfo"


class Attraction(Location):
    info_page = "GeoffreyAttractionInfo"


class Resource(models.Model):
    farm = models.ForeignKey(PublicFarm, related_name="resource", on_delete=models.CASCADE)
    resource_name = models.CharField(max_length=128)

    @property
    def json(self):
        """
        JSON representation of the Resource

        .. code-block:: json

            {
                "name": "Dirt"
                "farm_id": 1
            }
        """
        return {"name": self.resource_name,
                "farm_id": self.farm_id
                }


class ItemListing(models.Model):
    item_name = models.CharField(max_length=128)
    """
    Name of the item
    """

    price = models.IntegerField()
    """
    Number of diamonds per amount of items
    """

    amount = models.IntegerField()
    """
    Number of items
    """

    date_restocked = models.DateTimeField(auto_now=True)
    """
    Datetime the item was last restocked
    """

    shop = models.ForeignKey(Shop, related_name="shop_selling", on_delete=models.CASCADE)
    """
    Shop the item is sold at
    """

    @property
    def normalized_price(self):
        """
        normalized price, price/amount
        """

        if self.amount == 0:
            return maxsize
        else:
            return self.price / self.amount

    @property
    def number_of_days_since_restocked(self):
        """
        days since this item was restocked
        """
        days = (datetime.datetime.now().astimezone() - self.date_restocked.astimezone()).days

        return days

    @property
    def json(self):
        """
        JSON representation of the item

        .. code-block:: json

            {
                "item_name": "dirt",
                "price": 1,
                "amount": 1,
                "date_restocked": 1553264508,
                "days_since_restock": 10,
                "normalized_price": 1,
                "shop": {}
            }
        """

        return {"item_name": self.item_name,
                "price": self.price,
                "amount": self.amount,
                "date_restocked": self.date_restocked.timestamp(),
                "days_since_restock": self.number_of_days_since_restocked,
                "normalized_price": self.normalized_price,
                "shop": self.shop.json,
                }

    def __str__(self):
        return "Item: %d %s for %d" % (self.amount, self.item_name, self.amount)


class Tunnel(models.Model):
    TUNNEL_NAMES = (
        ('N', getattr(settings, 'GEOFFREY_NORTH_TUNNEL', '')),
        ('E', getattr(settings, 'GEOFFREY_EAST_TUNNEL', '')),
        ('S', getattr(settings, 'GEOFFREY_SOUTH_TUNNEL', '')),
        ('W', getattr(settings, 'GEOFFREY_WEST_TUNNEL', ''))
    )
    """
    Tunnel Direction
    """

    tunnel_number = models.IntegerField()
    """
    Tunnel coordinate
    """

    tunnel_direction = models.CharField(max_length=1, choices=TUNNEL_NAMES)
    """
    Tunnel Direction
    """

    location = models.ForeignKey(Location, related_name="tunnel_location", on_delete=models.CASCADE)
    """
    Location that the tunnel is connected to
    """

    def __str__(self):
        return "Tunnel: %s %d" % (self.get_tunnel_direction_display(), self.tunnel_number)

    @property
    def json(self):
        """
        JSON representation of the tunnel`

        .. code-block:: json

            {
                "location_name": "Base",
                "tunnel_direction": "N",
                "tunnel_number": 500
            }
        """
        return {"location_name": self.location.name,
                "tunnel_direction": self.get_tunnel_direction_display(),
                "tunnel_number": self.tunnel_number
                }

    @property
    def tunnel_str(self):
        """
        formatted tunnel string
        """
        return "{} {}".format(self.get_tunnel_direction_display(), self.tunnel_number)