// nazarick-core/src/llm/traits.rs

use std::str::FromStr;
use crate::types::Result;
use crate::llm::types::{LlmRequest, LlmResponse};

#[derive(Debug, Clone, PartialEq)]
pub enum SkillFormat {
    /// XML-Tags — für lokale Modelle ohne Function Calling
    Xml,
    /// Native Tool Use — Ollama, Mistral API, OpenRouter
    ToolUse,
    /// Skills deaktiviert
    None,
}

impl FromStr for SkillFormat {
    type Err = ();

    fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {
        match s {
            "tool_use" => Ok(Self::ToolUse),
            "none"     => Ok(Self::None),
            _          => Ok(Self::Xml),
        }
    }
}

#[async_trait::async_trait]
pub trait LlmProvider: Send + Sync {
    async fn complete(&self, request: LlmRequest) -> Result<LlmResponse>;
    fn name(&self) -> &str;
    fn skill_format(&self) -> SkillFormat {
        SkillFormat::Xml
    }
}