openai-tools 1.1.0

//! OpenAI Models API Request Module
//!
//! This module provides the functionality to interact with the OpenAI Models API.
//! It allows you to list, retrieve, and delete models available in the OpenAI platform.
//!
//! # Key Features
//!
//! - **List Models**: Retrieve all available models
//! - **Retrieve Model**: Get details of a specific model
//! - **Delete Model**: Delete a fine-tuned model (only for models you own)
//!
//! # Quick Start
//!
//! ```rust,no_run
//! use openai_tools::models::request::Models;
//!
//! #[tokio::main]
//! async fn main() -> Result<(), Box<dyn std::error::Error>> {
//!     let models = Models::new()?;
//!
//!     // List all available models
//!     let response = models.list().await?;
//!     for model in &response.data {
//!         println!("{}: owned by {}", model.id, model.owned_by);
//!     }
//!
//!     Ok(())
//! }
//! ```

use crate::common::auth::AuthProvider;
use crate::common::client::create_http_client;
use crate::common::errors::{ErrorResponse, OpenAIToolError, Result};
use crate::models::response::{DeleteResponse, Model, ModelsListResponse};
use std::time::Duration;

/// Default API path for Models
const MODELS_PATH: &str = "models";

/// Client for interacting with the OpenAI Models API.
///
/// This struct provides methods to list, retrieve, and delete models.
/// Use [`Models::new()`] to create a new instance.
///
/// # Example
///
/// ```rust,no_run
/// use openai_tools::models::request::Models;
///
/// #[tokio::main]
/// async fn main() -> Result<(), Box<dyn std::error::Error>> {
///     let models = Models::new()?;
///
///     // Get details of a specific model
///     let model = models.retrieve("gpt-4o-mini").await?;
///     println!("Model: {} (created: {})", model.id, model.created);
///
///     Ok(())
/// }
/// ```
pub struct Models {
    /// Authentication provider (OpenAI or Azure)
    auth: AuthProvider,
    /// Optional request timeout duration
    timeout: Option<Duration>,
}

impl Models {
    /// Creates a new Models client for OpenAI API.
    ///
    /// Initializes the client by loading the OpenAI API key from
    /// the environment variable `OPENAI_API_KEY`. Supports `.env` file loading
    /// via dotenvy.
    ///
    /// # Returns
    ///
    /// * `Ok(Models)` - A new Models client ready for use
    /// * `Err(OpenAIToolError)` - If the API key is not found in the environment
    ///
    /// # Example
    ///
    /// ```rust,no_run
    /// use openai_tools::models::request::Models;
    ///
    /// let models = Models::new().expect("API key should be set");
    /// ```
    pub fn new() -> Result<Self> {
        let auth = AuthProvider::openai_from_env()?;
        Ok(Self { auth, timeout: None })
    }

    /// Creates a new Models client with a custom authentication provider
    pub fn with_auth(auth: AuthProvider) -> Self {
        Self { auth, timeout: None }
    }

    /// Creates a new Models client for Azure OpenAI API
    pub fn azure() -> Result<Self> {
        let auth = AuthProvider::azure_from_env()?;
        Ok(Self { auth, timeout: None })
    }

    /// Creates a new Models client by auto-detecting the provider
    pub fn detect_provider() -> Result<Self> {
        let auth = AuthProvider::from_env()?;
        Ok(Self { auth, timeout: None })
    }

    /// Creates a new Models client with URL-based provider detection
    pub fn with_url<S: Into<String>>(base_url: S, api_key: S) -> Self {
        let auth = AuthProvider::from_url_with_key(base_url, api_key);
        Self { auth, timeout: None }
    }

    /// Creates a new Models client from URL using environment variables
    pub fn from_url<S: Into<String>>(url: S) -> Result<Self> {
        let auth = AuthProvider::from_url(url)?;
        Ok(Self { auth, timeout: None })
    }

    /// Returns the authentication provider
    pub fn auth(&self) -> &AuthProvider {
        &self.auth
    }

    /// Sets the request timeout duration.
    ///
    /// # Arguments
    ///
    /// * `timeout` - The maximum time to wait for a response
    ///
    /// # Returns
    ///
    /// A mutable reference to self for method chaining
    ///
    /// # Example
    ///
    /// ```rust,no_run
    /// use std::time::Duration;
    /// use openai_tools::models::request::Models;
    ///
    /// let mut models = Models::new().unwrap();
    /// models.timeout(Duration::from_secs(30));
    /// ```
    pub fn timeout(&mut self, timeout: Duration) -> &mut Self {
        self.timeout = Some(timeout);
        self
    }

    /// Creates the HTTP client with default headers.
    fn create_client(&self) -> Result<(request::Client, request::header::HeaderMap)> {
        let client = create_http_client(self.timeout)?;
        let mut headers = request::header::HeaderMap::new();
        self.auth.apply_headers(&mut headers)?;
        headers.insert("User-Agent", request::header::HeaderValue::from_static("openai-tools-rust"));
        Ok((client, headers))
    }

    /// Lists all available models.
    ///
    /// Returns a list of models that are currently available in the OpenAI API.
    ///
    /// # Returns
    ///
    /// * `Ok(ModelsListResponse)` - The list of available models
    /// * `Err(OpenAIToolError)` - If the request fails or response parsing fails
    ///
    /// # Example
    ///
    /// ```rust,no_run
    /// use openai_tools::models::request::Models;
    ///
    /// #[tokio::main]
    /// async fn main() -> Result<(), Box<dyn std::error::Error>> {
    ///     let models = Models::new()?;
    ///     let response = models.list().await?;
    ///
    ///     println!("Found {} models", response.data.len());
    ///     for model in &response.data {
    ///         println!("- {}", model.id);
    ///     }
    ///     Ok(())
    /// }
    /// ```
    pub async fn list(&self) -> Result<ModelsListResponse> {
        let (client, headers) = self.create_client()?;

        let url = self.auth.endpoint(MODELS_PATH);
        let response = client.get(&url).headers(headers).send().await.map_err(OpenAIToolError::RequestError)?;

        let status = response.status();
        let content = response.text().await.map_err(OpenAIToolError::RequestError)?;

        if cfg!(test) {
            tracing::info!("Response content: {}", content);
        }

        if !status.is_success() {
            if let Ok(error_resp) = serde_json::from_str::<ErrorResponse>(&content) {
                return Err(OpenAIToolError::Error(error_resp.error.message.unwrap_or_default()));
            }
            return Err(OpenAIToolError::Error(format!("API error ({}): {}", status, content)));
        }

        serde_json::from_str::<ModelsListResponse>(&content).map_err(OpenAIToolError::SerdeJsonError)
    }

    /// Retrieves details of a specific model.
    ///
    /// Gets information about a model by its ID, including when it was created
    /// and who owns it.
    ///
    /// # Arguments
    ///
    /// * `model_id` - The ID of the model to retrieve (e.g., "gpt-4o-mini")
    ///
    /// # Returns
    ///
    /// * `Ok(Model)` - The model details
    /// * `Err(OpenAIToolError)` - If the model is not found or the request fails
    ///
    /// # Example
    ///
    /// ```rust,no_run
    /// use openai_tools::models::request::Models;
    ///
    /// #[tokio::main]
    /// async fn main() -> Result<(), Box<dyn std::error::Error>> {
    ///     let models = Models::new()?;
    ///     let model = models.retrieve("gpt-4o-mini").await?;
    ///
    ///     println!("Model: {}", model.id);
    ///     println!("Owned by: {}", model.owned_by);
    ///     println!("Created: {}", model.created);
    ///     Ok(())
    /// }
    /// ```
    pub async fn retrieve(&self, model_id: &str) -> Result<Model> {
        let (client, headers) = self.create_client()?;
        let url = format!("{}/{}", self.auth.endpoint(MODELS_PATH), model_id);

        let response = client.get(&url).headers(headers).send().await.map_err(OpenAIToolError::RequestError)?;

        let status = response.status();
        let content = response.text().await.map_err(OpenAIToolError::RequestError)?;

        if cfg!(test) {
            tracing::info!("Response content: {}", content);
        }

        if !status.is_success() {
            if let Ok(error_resp) = serde_json::from_str::<ErrorResponse>(&content) {
                return Err(OpenAIToolError::Error(error_resp.error.message.unwrap_or_default()));
            }
            return Err(OpenAIToolError::Error(format!("API error ({}): {}", status, content)));
        }

        serde_json::from_str::<Model>(&content).map_err(OpenAIToolError::SerdeJsonError)
    }

    /// Deletes a fine-tuned model.
    ///
    /// You must have the Owner role in your organization or be allowed to delete models.
    /// This only works for fine-tuned models that you have created.
    ///
    /// # Arguments
    ///
    /// * `model_id` - The ID of the fine-tuned model to delete
    ///
    /// # Returns
    ///
    /// * `Ok(DeleteResponse)` - Confirmation of deletion
    /// * `Err(OpenAIToolError)` - If the model cannot be deleted or the request fails
    ///
    /// # Example
    ///
    /// ```rust,no_run
    /// use openai_tools::models::request::Models;
    ///
    /// #[tokio::main]
    /// async fn main() -> Result<(), Box<dyn std::error::Error>> {
    ///     let models = Models::new()?;
    ///
    ///     // Delete a fine-tuned model
    ///     let result = models.delete("ft:gpt-4o-mini:my-org:my-model:abc123").await?;
    ///     if result.deleted {
    ///         println!("Model {} was deleted", result.id);
    ///     }
    ///     Ok(())
    /// }
    /// ```
    pub async fn delete(&self, model_id: &str) -> Result<DeleteResponse> {
        let (client, headers) = self.create_client()?;
        let url = format!("{}/{}", self.auth.endpoint(MODELS_PATH), model_id);

        let response = client.delete(&url).headers(headers).send().await.map_err(OpenAIToolError::RequestError)?;

        let status = response.status();
        let content = response.text().await.map_err(OpenAIToolError::RequestError)?;

        if cfg!(test) {
            tracing::info!("Response content: {}", content);
        }

        if !status.is_success() {
            if let Ok(error_resp) = serde_json::from_str::<ErrorResponse>(&content) {
                return Err(OpenAIToolError::Error(error_resp.error.message.unwrap_or_default()));
            }
            return Err(OpenAIToolError::Error(format!("API error ({}): {}", status, content)));
        }

        serde_json::from_str::<DeleteResponse>(&content).map_err(OpenAIToolError::SerdeJsonError)
    }
}