from datetime import date as Date, datetime
from decimal import Decimal
from typing import Optional
from pydantic import BaseModel, Field


# ── Auth ──────────────────────────────────────────────────────────────────────

class LoginRequest(BaseModel):
    username: str
    password: str

class TokenResponse(BaseModel):
    access_token: str
    token_type: str = "bearer"

class UserPayload(BaseModel):
    sub:      str
    username: str
    is_admin: bool
    timezone: str
    exp:      int
    admin_id: Optional[int] = None

class AuthResponse(BaseModel):
    user: UserPayload

class ChangePasswordRequest(BaseModel):
    current_password: str
    new_password: str = Field(min_length=10)

class ResetPasswordRequest(BaseModel):
    new_password: str = Field(min_length=10)

class TimezoneUpdate(BaseModel):
    timezone: str = Field(min_length=1, max_length=64)


# ── Users ─────────────────────────────────────────────────────────────────────

class UserCreate(BaseModel):
    username: str = Field(min_length=2, max_length=64)
    password: str = Field(min_length=10)

class UserOut(BaseModel):
    id:          int
    username:    str
    is_admin:    bool
    is_disabled: bool
    timezone:    str
    created_at:  datetime

    model_config = {"from_attributes": True}


# ── Egg Collections ───────────────────────────────────────────────────────────

class EggCollectionCreate(BaseModel):
    date:  Date
    eggs:  int  = Field(ge=0)
    notes: Optional[str] = None

class EggCollectionUpdate(BaseModel):
    date:  Optional[Date] = None
    eggs:  Optional[int]  = Field(default=None, ge=0)
    notes: Optional[str]  = None

class EggCollectionOut(BaseModel):
    id:         int
    date:       Date
    eggs:       int
    notes:      Optional[str]
    created_at: datetime

    model_config = {"from_attributes": True}


# ── Flock History ─────────────────────────────────────────────────────────────

class FlockHistoryCreate(BaseModel):
    date:          Date
    chicken_count: int = Field(ge=0)
    notes:         Optional[str] = None

class FlockHistoryUpdate(BaseModel):
    date:          Optional[Date] = None
    chicken_count: Optional[int]  = Field(default=None, ge=0)
    notes:         Optional[str]  = None

class FlockHistoryOut(BaseModel):
    id:            int
    date:          Date
    chicken_count: int
    notes:         Optional[str]
    created_at:    datetime

    model_config = {"from_attributes": True}


# ── Feed Purchases ────────────────────────────────────────────────────────────

class FeedPurchaseCreate(BaseModel):
    date:          Date
    bags:          Decimal = Field(gt=0, decimal_places=2)
    price_per_bag: Decimal = Field(gt=0, decimal_places=2)
    notes:         Optional[str] = None

class FeedPurchaseUpdate(BaseModel):
    date:          Optional[Date]    = None
    bags:          Optional[Decimal] = Field(default=None, gt=0, decimal_places=2)
    price_per_bag: Optional[Decimal] = Field(default=None, gt=0, decimal_places=2)
    notes:         Optional[str]     = None

class FeedPurchaseOut(BaseModel):
    id:            int
    date:          Date
    bags:          Decimal
    price_per_bag: Decimal
    notes:         Optional[str]
    created_at:    datetime

    model_config = {"from_attributes": True}


# ── Other Purchases ───────────────────────────────────────────────────────────

class OtherPurchaseCreate(BaseModel):
    date:  Date
    total: Decimal = Field(gt=0, decimal_places=2)
    notes: Optional[str] = None

class OtherPurchaseUpdate(BaseModel):
    date:  Optional[Date]    = None
    total: Optional[Decimal] = Field(default=None, gt=0, decimal_places=2)
    notes: Optional[str]     = None

class OtherPurchaseOut(BaseModel):
    id:         int
    date:       Date
    total:      Decimal
    notes:      Optional[str]
    created_at: datetime

    model_config = {"from_attributes": True}


# ── Stats ─────────────────────────────────────────────────────────────────────

class MonthlySummary(BaseModel):
    year:                   int
    month:                  int
    month_label:            str
    total_eggs:             int
    days_logged:            int
    avg_eggs_per_day:       Optional[float]
    flock_at_month_end:     Optional[int]
    avg_eggs_per_hen_per_day: Optional[float]
    feed_cost:              Optional[Decimal]
    other_cost:             Optional[Decimal]
    cost_per_egg:           Optional[Decimal]
    cost_per_dozen:         Optional[Decimal]


class DashboardStats(BaseModel):
    current_flock:            Optional[int]
    total_eggs_alltime:       int
    total_eggs_30d:           int
    total_eggs_7d:            int
    avg_eggs_per_day_30d:     Optional[float]
    avg_eggs_per_hen_day_30d: Optional[float]
    days_tracked:             int

class BudgetStats(BaseModel):
    total_feed_cost:      Optional[Decimal]
    total_feed_cost_30d:  Optional[Decimal]
    total_other_cost:     Optional[Decimal]
    total_other_cost_30d: Optional[Decimal]
    total_eggs_alltime:   int
    total_eggs_30d:       int
    cost_per_egg:         Optional[Decimal]
    cost_per_dozen:       Optional[Decimal]
    cost_per_egg_30d:     Optional[Decimal]
    cost_per_dozen_30d:   Optional[Decimal]