"""Chore schemas."""
from pydantic import BaseModel, ConfigDict, field_validator
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from typing import Optional, Union, List
from datetime import datetime, date

from app.models.chore import ChoreFrequency, ChoreStatus, ChoreAssignmentType
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from typing import Optional, Union
from datetime import datetime, date

from app.models.chore import ChoreFrequency, ChoreStatus
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class ChoreBase(BaseModel):
    """Base chore schema."""
    title: str
    description: Optional[str] = None
    room: str
    frequency: ChoreFrequency
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    points: Optional[int] = 0
    image_url: Optional[str] = None
    assignment_type: Optional[ChoreAssignmentType] = ChoreAssignmentType.ANY_ONE
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    assigned_user_id: Optional[int] = None
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    due_date: Optional[Union[datetime, date, str]] = None
    
    @field_validator('due_date', mode='before')
    @classmethod
    def parse_due_date(cls, v):
        """Parse due_date to handle various formats."""
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        if v is None or v == '' or isinstance(v, (datetime, date)):
            return None if v == '' else v
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        if v is None or isinstance(v, (datetime, date)):
            return v
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        if isinstance(v, str):
            # Try parsing as datetime first
            for fmt in ['%Y-%m-%dT%H:%M:%S', '%Y-%m-%d']:
                try:
                    return datetime.strptime(v, fmt)
                except ValueError:
                    continue
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            # If no format matches, return None instead of the invalid string
            return None
        return None
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        return v
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class ChoreCreate(ChoreBase):
    """Schema for creating a chore."""
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    assigned_user_ids: Optional[List[int]] = []  # Multiple users can be assigned
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    pass
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class ChoreUpdate(BaseModel):
    """Schema for updating a chore."""
    title: Optional[str] = None
    description: Optional[str] = None
    room: Optional[str] = None
    frequency: Optional[ChoreFrequency] = None
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    points: Optional[int] = None
    status: Optional[ChoreStatus] = None
    assignment_type: Optional[ChoreAssignmentType] = None
    assigned_user_ids: Optional[List[int]] = None  # Multiple users
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    status: Optional[ChoreStatus] = None
    assigned_user_id: Optional[int] = None
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    due_date: Optional[Union[datetime, date, str]] = None
    
    @field_validator('due_date', mode='before')
    @classmethod
    def parse_due_date(cls, v):
        """Parse due_date to handle various formats."""
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        if v is None or v == '' or isinstance(v, (datetime, date)):
            return None if v == '' else v
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        if v is None or isinstance(v, (datetime, date)):
            return v
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        if isinstance(v, str):
            # Try parsing as datetime first
            for fmt in ['%Y-%m-%dT%H:%M:%S', '%Y-%m-%d']:
                try:
                    return datetime.strptime(v, fmt)
                except ValueError:
                    continue
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            # If no format matches, return None instead of the invalid string
            return None
        return None


class AssignedUserDetail(BaseModel):
    """User info for chore assignment."""
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        return v


class AssignedUser(BaseModel):
    """Minimal user info for chore assignment."""
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    model_config = ConfigDict(from_attributes=True)
    
    id: int
    username: str
    full_name: str
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    avatar_url: Optional[str] = None
    birthday: Optional[date] = None
    completed_at: Optional[datetime] = None  # When this user completed the chore
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class Chore(ChoreBase):
    """Schema for a chore response."""
    model_config = ConfigDict(from_attributes=True)
    
    id: int
    status: ChoreStatus
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    points: int
    assignment_type: ChoreAssignmentType
    assigned_users: List[AssignedUserDetail] = []  # Multiple users with completion status
    completed_at: Optional[datetime] = None
    created_at: datetime
    updated_at: datetime
    
    # Legacy field for backward compatibility
    assigned_user_id: Optional[int] = None
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    assigned_user: Optional[AssignedUser] = None
    completed_at: Optional[datetime] = None
    created_at: datetime
    updated_at: datetime
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