//! Anthropic API 数据模型
//!
//! 用于 Anthropic Messages API 的请求/响应格式转换

use serde::{Deserialize, Serialize};
use serde_json::Value;

/// Anthropic 请求
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct AnthropicRequest {
    pub model: String,
    pub messages: Vec<AnthropicMessage>,
    pub max_tokens: u32,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub system: Option<Value>, // 可以是 String 或 Vec<SystemBlock>
    #[serde(skip_serializing_if = "Option::is_none")]
    pub temperature: Option<f32>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub stream: Option<bool>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub tools: Option<Vec<AnthropicTool>>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub tool_choice: Option<Value>,
}

/// Anthropic 消息
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct AnthropicMessage {
    pub role: String,
    pub content: Value, // String 或 Vec<ContentBlock>
}

/// Anthropic 内容块
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(tag = "type")]
pub enum AnthropicContentBlock {
    #[serde(rename = "text")]
    Text { text: String },
    #[serde(rename = "image")]
    Image { source: ImageSource },
    #[serde(rename = "tool_use")]
    ToolUse {
        id: String,
        name: String,
        input: Value,
    },
    #[serde(rename = "tool_result")]
    ToolResult { tool_use_id: String, content: Value },
}

/// 图片来源
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ImageSource {
    #[serde(rename = "type")]
    pub source_type: String,
    pub media_type: String,
    pub data: String,
}

/// Anthropic 工具定义
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct AnthropicTool {
    pub name: String,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub description: Option<String>,
    pub input_schema: Value,
}

/// Anthropic 响应
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct AnthropicResponse {
    pub id: String,
    #[serde(rename = "type")]
    pub response_type: String,
    pub role: String,
    pub content: Vec<AnthropicResponseContent>,
    pub model: String,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub stop_reason: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub stop_sequence: Option<String>,
    pub usage: AnthropicUsage,
}

/// Anthropic 响应内容
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(tag = "type")]
pub enum AnthropicResponseContent {
    #[serde(rename = "text")]
    Text { text: String },
    #[serde(rename = "tool_use")]
    ToolUse {
        id: String,
        name: String,
        input: Value,
    },
}

/// Anthropic 使用量
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct AnthropicUsage {
    pub input_tokens: u32,
    pub output_tokens: u32,
}