// src/agent/tools/astro/research/note.rs
// SaveNoteTool — 保存研究笔记

use async_trait::async_trait;
use serde_json::json;
use tracing::info;

use crate::agent::tools::{AgentTool, InterruptBehavior, ToolContext, ToolOutput};

pub struct SaveNoteTool;

#[async_trait]
impl AgentTool for SaveNoteTool {
    fn name(&self) -> &str {
        "save_note"
    }

    fn description(&self) -> &str {
        "将研究中间结果或最终结论保存为 Markdown 笔记文件。适用于记录阅读摘要、研究思路、文献分析等。"
    }

    fn parameters(&self) -> serde_json::Value {
        json!({
            "type": "object",
            "properties": {
                "title": {
                    "type": "string",
                    "description": "笔记标题，将被用于文件名（特殊字符会被过滤）"
                },
                "content": {
                    "type": "string",
                    "description": "笔记正文内容，支持 Markdown 格式（含 LaTeX 数学公式）"
                }
            },
            "required": ["title", "content"]
        })
    }

    fn group(&self) -> &str {
        "as:research"
    }

    fn interrupt_behavior(&self) -> InterruptBehavior {
        InterruptBehavior::Block
    }

    async fn execute(&self, args: serde_json::Value, ctx: &ToolContext) -> ToolOutput {
        let title = match args.get("title").and_then(|t| t.as_str()) {
            Some(t) => t.to_string(),
            None => return ToolOutput::error("缺少必需参数 'title'"),
        };
        let content = match args.get("content").and_then(|c| c.as_str()) {
            Some(c) => c.to_string(),
            None => return ToolOutput::error("缺少必需参数 'content'"),
        };

        info!("[SaveNote] 保存笔记: {}", title);
        let state = &ctx.app_state;

        // 文件名安全化
        let safe_title: String = title
            .chars()
            .map(|c| {
                if c.is_alphanumeric() || c == '-' || c == '_' || c == ' ' {
                    c
                } else {
                    '_'
                }
            })
            .collect::<String>()
            .replace(' ', "_");

        let notes_dir = state.config.library_dir.join("notes");
        if let Err(e) = std::fs::create_dir_all(&notes_dir) {
            return ToolOutput::error(format!("创建笔记目录失败: {}", e));
        }

        let filename = format!("{}.md", safe_title);
        let filepath = notes_dir.join(&filename);

        let full_content = format!(
            "---\ntitle: {}\ndate: {}\ngenerated_by: AstroResearch Agent\n---\n\n{}",
            title,
            chrono::Local::now().format("%Y-%m-%d %H:%M:%S"),
            content
        );

        match std::fs::write(&filepath, &full_content) {
            Ok(_) => ToolOutput::success(
                format!("笔记已保存: {}", filename),
                json!({
                    "filename": filename,
                    "path": filepath.to_string_lossy(),
                    "size": full_content.len()
                }),
            ),
            Err(e) => ToolOutput::error(format!("保存笔记失败: {}", e)),
        }
    }
}