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"""Pydantic models for API responses."""

from typing import Any, Literal

from pydantic import BaseModel

from .anthropic import ContentBlockText, ContentBlockThinking, ContentBlockToolUse


class TokenCountResponse(BaseModel):
    input_tokens: int


class ModelResponse(BaseModel):
    created_at: str
    display_name: str
    id: str
    type: Literal["model"] = "model"


class ModelsListResponse(BaseModel):
    data: list[ModelResponse]
    first_id: str | None
    has_more: bool
    last_id: str | None


class Usage(BaseModel):
    input_tokens: int
    output_tokens: int
    cache_creation_input_tokens: int = 0
    cache_read_input_tokens: int = 0


class MessagesResponse(BaseModel):
    id: str
    model: str
    role: Literal["assistant"] = "assistant"
    content: list[
        ContentBlockText | ContentBlockToolUse | ContentBlockThinking | dict[str, Any]
    ]
    type: Literal["message"] = "message"
    stop_reason: (
        Literal["end_turn", "max_tokens", "stop_sequence", "tool_use"] | None
    ) = None
    stop_sequence: str | None = None
    usage: Usage