import re
from pydantic import BaseModel, ConfigDict, Field, field_validator
from typing import Optional, Literal
from datetime import datetime


class InviteMemberRequest(BaseModel):
    model_config = ConfigDict(extra="forbid")
    connection_id: int = Field(ge=1, le=2147483647)
    permission: Literal["read_only", "create_modify", "full_access"]
    can_add_others: bool = False


class RespondInviteRequest(BaseModel):
    model_config = ConfigDict(extra="forbid")
    action: Literal["accept", "reject"]


class UpdateMemberRequest(BaseModel):
    model_config = ConfigDict(extra="forbid")
    permission: Optional[Literal["read_only", "create_modify", "full_access"]] = None
    can_add_others: Optional[bool] = None


class UpdateLocalColorRequest(BaseModel):
    model_config = ConfigDict(extra="forbid")
    local_color: Optional[str] = Field(None, max_length=20)

    @field_validator("local_color")
    @classmethod
    def validate_color(cls, v: Optional[str]) -> Optional[str]:
        if v is not None and not re.match(r"^#[0-9a-fA-F]{6}$", v):
            raise ValueError("Color must be a hex color code (#RRGGBB)")
        return v


class ConvertToSharedRequest(BaseModel):
    model_config = ConfigDict(extra="forbid")


class CalendarMemberResponse(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: int
    calendar_id: int
    user_id: int
    umbral_name: str
    preferred_name: Optional[str] = None
    permission: str
    can_add_others: bool
    local_color: Optional[str] = None
    status: str
    invited_at: datetime
    accepted_at: Optional[datetime] = None


class CalendarInviteResponse(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: int
    calendar_id: int
    calendar_name: str
    calendar_color: str
    owner_umbral_name: str
    inviter_umbral_name: str
    permission: str
    invited_at: datetime


class LockStatusResponse(BaseModel):
    locked: bool
    locked_by_name: Optional[str] = None
    expires_at: Optional[datetime] = None
    is_permanent: bool = False


class SyncResponse(BaseModel):
    events: list[dict]
    member_changes: list[dict]
    server_time: datetime
    truncated: bool = False