from datetime import datetime
from typing import Optional, List
from pydantic import BaseModel, Field


class ApplicationBase(BaseModel):
    """Base application schema"""
    name: str = Field(..., min_length=1, max_length=100)
    redirect_uris: List[str] = Field(default_factory=list)
    grant_types: List[str] = Field(
        default_factory=lambda: ["authorization_code", "refresh_token"]
    )
    scopes: List[str] = Field(default_factory=lambda: ["read", "write"])


class ApplicationCreate(ApplicationBase):
    """Schema for creating a new application"""
    pass


class ApplicationUpdate(BaseModel):
    """Schema for updating an application (all fields optional)"""
    name: Optional[str] = Field(None, min_length=1, max_length=100)
    redirect_uris: Optional[List[str]] = None
    grant_types: Optional[List[str]] = None
    scopes: Optional[List[str]] = None


class ApplicationResponse(ApplicationBase):
    """Schema for application response"""
    id: str = Field(..., alias="_id")
    client_id: str
    owner_id: str
    created_at: datetime
    updated_at: datetime

    class Config:
        populate_by_name = True
        from_attributes = True


class ApplicationWithSecret(ApplicationResponse):
    """Schema for application response with client secret (only on creation)"""
    client_secret: str = Field(..., description="Plain text client secret (only shown once)")