//! 通用设置数据访问对象
//!
//! 提供键值对形式的通用设置存储。

use crate::database::{lock_conn, Database};
use crate::error::AppError;
use rusqlite::params;

impl Database {
    /// 获取设置值
    pub fn get_setting(&self, key: &str) -> Result<Option<String>, AppError> {
        let conn = lock_conn!(self.conn);
        let mut stmt = conn
            .prepare("SELECT value FROM settings WHERE key = ?1")
            .map_err(|e| AppError::Database(e.to_string()))?;

        let mut rows = stmt
            .query(params![key])
            .map_err(|e| AppError::Database(e.to_string()))?;

        if let Some(row) = rows.next().map_err(|e| AppError::Database(e.to_string()))? {
            Ok(Some(
                row.get(0).map_err(|e| AppError::Database(e.to_string()))?,
            ))
        } else {
            Ok(None)
        }
    }

    /// 设置值
    pub fn set_setting(&self, key: &str, value: &str) -> Result<(), AppError> {
        let conn = lock_conn!(self.conn);
        conn.execute(
            "INSERT OR REPLACE INTO settings (key, value) VALUES (?1, ?2)",
            params![key, value],
        )
        .map_err(|e| AppError::Database(e.to_string()))?;
        Ok(())
    }

    // --- Config Snippets 辅助方法 ---

    /// 获取通用配置片段
    pub fn get_config_snippet(&self, app_type: &str) -> Result<Option<String>, AppError> {
        self.get_setting(&format!("common_config_{app_type}"))
    }

    /// 设置通用配置片段
    pub fn set_config_snippet(
        &self,
        app_type: &str,
        snippet: Option<String>,
    ) -> Result<(), AppError> {
        let key = format!("common_config_{app_type}");
        if let Some(value) = snippet {
            self.set_setting(&key, &value)
        } else {
            // 如果为 None 则删除
            let conn = lock_conn!(self.conn);
            conn.execute("DELETE FROM settings WHERE key = ?1", params![key])
                .map_err(|e| AppError::Database(e.to_string()))?;
            Ok(())
        }
    }
}
