export type MessageRole = "user" | "assistant" | "system" | "tool";

export type MessageStatus = "pending" | "streaming" | "complete" | "error";

export interface TextContent {
  type: "text";
  text: string;
}

export interface ToolUseContent {
  type: "tool_use";
  id: string;
  name: string;
  input: Record<string, unknown>;
}

export interface ToolResultContent {
  type: "tool_result";
  tool_use_id: string;
  content: string | ContentBlock[];
  is_error?: boolean;
}

export type ContentBlock = TextContent | ToolUseContent | ToolResultContent;

export interface Message {
  id: string;
  role: MessageRole;
  content: ContentBlock[] | string;
  status: MessageStatus;
  createdAt: number;
  model?: string;
  usage?: {
    input_tokens: number;
    output_tokens: number;
  };
}

export interface Conversation {
  id: string;
  title: string;
  messages: Message[];
  createdAt: number;
  updatedAt: number;
  model?: string;
}

export interface ToolDefinition {
  name: string;
  description: string;
  input_schema: Record<string, unknown>;
}

export interface AppSettings {
  theme: "light" | "dark" | "system";
  model: string;
  apiUrl: string;
  streamingEnabled: boolean;
}