cooklang-import 0.9.2

mod anthropic;
mod azure_openai;
mod google;
mod ollama;
mod open_ai;
mod prompt;

pub use anthropic::AnthropicConverter;
pub use azure_openai::AzureOpenAiConverter;
pub use google::GoogleConverter;
pub use ollama::OllamaConverter;
pub use open_ai::OpenAiConverter;
pub use prompt::{inject_recipe, COOKLANG_CONVERTER_PROMPT};

use async_trait::async_trait;
use serde::Serialize;
use std::error::Error;

/// Metadata about token usage from LLM conversion
#[derive(Debug, Clone, Default, Serialize)]
pub struct TokenUsage {
    /// Number of tokens in the input/prompt
    pub input_tokens: Option<u32>,
    /// Number of tokens in the output/completion
    pub output_tokens: Option<u32>,
}

/// Metadata about the conversion operation
#[derive(Debug, Clone, Default, Serialize)]
pub struct ConversionMetadata {
    /// The model version/name that was used for conversion
    pub model_version: Option<String>,
    /// Token usage information
    pub tokens_used: TokenUsage,
    /// Time taken for the conversion in milliseconds
    pub latency_ms: u64,
}

/// Result of a conversion operation including the converted text and metadata
#[derive(Debug, Clone)]
pub struct ConversionResult {
    /// The converted Cooklang text
    pub content: String,
    /// Metadata about the conversion
    pub metadata: ConversionMetadata,
}

/// Unified trait for all converters that transform recipe text to Cooklang format
#[async_trait]
pub trait Converter: Send + Sync {
    /// Get the converter name (e.g., "open_ai", "anthropic")
    fn name(&self) -> &str;

    /// Convert recipe ingredients and instructions to Cooklang format
    async fn convert(
        &self,
        ingredients_and_instructions: &str,
    ) -> Result<ConversionResult, Box<dyn Error + Send + Sync>>;
}

/// Factory function to create a converter by name
///
/// # Arguments
/// * `name` - The converter name (e.g., "open_ai", "anthropic")
/// * `config` - Provider configuration
///
/// # Returns
/// * `Some(Box<dyn Converter>)` if the converter exists
/// * `None` if the converter name is not recognized
pub fn create_converter(
    name: &str,
    config: &crate::config::ProviderConfig,
) -> Option<Box<dyn Converter>> {
    match name {
        "open_ai" => OpenAiConverter::new(config)
            .ok()
            .map(|c| Box::new(c) as Box<dyn Converter>),
        "anthropic" => AnthropicConverter::new(config)
            .ok()
            .map(|c| Box::new(c) as Box<dyn Converter>),
        "azure_openai" => AzureOpenAiConverter::new(config)
            .ok()
            .map(|c| Box::new(c) as Box<dyn Converter>),
        "google" => GoogleConverter::new(config)
            .ok()
            .map(|c| Box::new(c) as Box<dyn Converter>),
        "ollama" => OllamaConverter::new(config)
            .ok()
            .map(|c| Box::new(c) as Box<dyn Converter>),
        _ => None,
    }
}