from typing import Optional, List, Dict, NewType, Any, Tuple, Union
from dataclasses import dataclass, field
from enum import Enum
from datetime import datetime
from uuid import UUID

from hologram import JsonSchemaMixin, FieldEncoder

Postcode = NewType("Postcode", str)


class PostcodeField(FieldEncoder):
    @property
    def json_schema(self):
        return {"type": "string", "minLength": 5, "maxLength": 8}


JsonSchemaMixin.register_field_encoders({Postcode: PostcodeField()})


class SubSchemas(JsonSchemaMixin):
    pass


class Weekday(Enum):
    MON = "Monday"
    TUE = "Tuesday"
    WED = "Wednesday"
    THU = "Thursday"
    FRI = "Friday"


@dataclass(eq=True)
class Point(SubSchemas):
    x: float = field(metadata=dict(description="Point x coordinate"))
    y: float = field(metadata=dict(description="Point y coordinate"))

    @classmethod
    def field_mapping(cls) -> Dict[str, str]:
        return {"x": "z"}


NewPoint = NewType("NewPoint", Point)


@dataclass
class Foo(SubSchemas):
    """A foo that foos"""

    a: datetime
    b: Optional[List[Point]]
    c: Dict[str, int]
    d: Weekday = field(init=False)
    f: Tuple[str, int]
    g: Tuple[str, ...]
    e: Optional[Postcode] = None
    h: Optional[NewPoint] = None


@dataclass(eq=True)
class Bar(JsonSchemaMixin):
    """Type with union field"""

    a: Union[Weekday, Point]


@dataclass
class Baz(JsonSchemaMixin):
    """Type with nested default value"""

    a: Point = field(default=Point(0.0, 0.0))


@dataclass
class Recursive(JsonSchemaMixin):
    """A recursive data-structure"""

    a: str
    b: Optional["Recursive"] = None


@dataclass
class OpaqueData(JsonSchemaMixin):
    """Structure with unknown types"""

    a: List[Any]
    b: Dict[str, Any]


@dataclass
class Product(JsonSchemaMixin):
    name: str
    cost: float = 20.0


@dataclass
class ShoppingCart(JsonSchemaMixin):
    items: List[Product]

    @property
    def cost(self):
        return sum([item.cost for item in self.items])


@dataclass
class ProductList(JsonSchemaMixin):
    products: Dict[UUID, Product]


@dataclass
class Zoo(JsonSchemaMixin):
    """A zoo"""

    animal_types: Optional[Dict[str, str]] = field(default_factory=dict)
