"""Pydantic request/response models for auth and personal inventory."""
from datetime import datetime
from typing import Any, Literal

from pydantic import BaseModel, ConfigDict, Field

from app import config


class RegisterRequest(BaseModel):
    username: str = Field(min_length=3, max_length=32)
    password: str = Field(min_length=8, max_length=128)


class LoginRequest(BaseModel):
    username: str = Field(min_length=1, max_length=32)
    password: str = Field(min_length=1, max_length=128)


class UserOut(BaseModel):
    model_config = ConfigDict(from_attributes=True)

    id: int
    username: str
    created_at: datetime


class AuthResponse(BaseModel):
    user: UserOut


class InventoryAddRequest(BaseModel):
    class_name: str = Field(min_length=1, max_length=255)
    quantity: int = Field(default=1, ge=1, le=config.MAX_QUANTITY)
    notes: str = Field(default="", max_length=config.MAX_NOTES_LENGTH)
    quality: int | None = Field(default=None, ge=1, le=config.MAX_QUALITY)


class InventoryPatchRequest(BaseModel):
    quantity: int | None = Field(default=None, ge=1, le=config.MAX_QUANTITY)
    notes: str | None = Field(default=None, max_length=config.MAX_NOTES_LENGTH)
    visibility: Literal["private", "available"] | None = None
    # Explicit null clears the quality; omitting the field leaves it unchanged.
    quality: int | None = Field(default=None, ge=1, le=config.MAX_QUALITY)


class InventoryEntryOut(BaseModel):
    class_name: str
    name: str
    category: str | None
    type: str | None
    size: int | None
    grade: Any | None = None
    manufacturer: dict | None
    quantity: int
    notes: str
    # Mining/refining quality (1-1000); only meaningful when
    # `quality_applicable` is true. None means the owner has not set it.
    quality: int | None = None
    quality_applicable: bool = False
    # Owner-chosen classification. Unrelated to `available` below.
    visibility: Literal["private", "available"]
    # False when the catalog no longer contains the referenced item (e.g. after
    # a dataset refresh). The row is preserved rather than silently deleted.
    available: bool
    created_at: datetime
    updated_at: datetime


class InventoryPage(BaseModel):
    total: int
    page: int
    page_size: int
    total_pages: int
    items: list[InventoryEntryOut]


class InventorySummary(BaseModel):
    items: int
    quantity: int
    categories: dict[str, int]
    unavailable: int


class AvailableItemOut(BaseModel):
    class_name: str
    name: str
    category: str | None
    type: str | None
    size: int | None
    grade: Any | None = None
    manufacturer: dict | None
    quantity: int
    quality: int | None = None
    quality_applicable: bool = False
    # Public listing: only the owner's display name, never notes.
    username: str
    updated_at: datetime


class AvailablePage(BaseModel):
    total: int
    page: int
    page_size: int
    total_pages: int
    items: list[AvailableItemOut]


class InventoryAddResponse(BaseModel):
    entry: InventoryEntryOut
    created: bool


class OrderCreateRequest(BaseModel):
    class_name: str = Field(min_length=1, max_length=255)
    quantity: int = Field(default=1, ge=1, le=config.MAX_QUANTITY)
    notes: str = Field(default="", max_length=config.MAX_NOTES_LENGTH)
    quality: int | None = Field(default=None, ge=1, le=config.MAX_QUALITY)


class OrderPatchRequest(BaseModel):
    quantity: int | None = Field(default=None, ge=1, le=config.MAX_QUANTITY)
    notes: str | None = Field(default=None, max_length=config.MAX_NOTES_LENGTH)
    status: Literal["open", "fulfilled"] | None = None
    # Explicit null clears the quality; omitting the field leaves it unchanged.
    quality: int | None = Field(default=None, ge=1, le=config.MAX_QUALITY)


class OrderOut(BaseModel):
    id: int
    class_name: str
    name: str
    category: str | None
    type: str | None
    size: int | None
    grade: Any | None = None
    manufacturer: dict | None
    quantity: int
    notes: str
    quality: int | None = None
    quality_applicable: bool = False
    # Public listing: the requesting user's display name.
    username: str
    status: Literal["open", "fulfilled"]
    # False when the catalog no longer contains the referenced item.
    available: bool
    created_at: datetime
    updated_at: datetime


class OrderPage(BaseModel):
    total: int
    page: int
    page_size: int
    total_pages: int
    items: list[OrderOut]