// SPDX-FileCopyrightText: Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
//
// Based on https://github.com/64bit/async-openai/ by Himanshu Neema
// Original Copyright (c) 2022 Himanshu Neema
// Licensed under MIT License (see ATTRIBUTIONS-Rust.md)
//
// Modifications Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES.
// Licensed under Apache 2.0

use serde::Serialize;

use crate::{
    Client,
    config::Config,
    error::OpenAIError,
    types::{
        CreateFineTuningJobRequest, FineTuningJob, ListFineTuningJobCheckpointsResponse,
        ListFineTuningJobEventsResponse, ListPaginatedFineTuningJobsResponse,
    },
};

/// Manage fine-tuning jobs to tailor a model to your specific training data.
///
/// Related guide: [Fine-tune models](https://platform.openai.com/docs/guides/fine-tuning)
pub struct FineTuning<'c, C: Config> {
    client: &'c Client<C>,
}

impl<'c, C: Config> FineTuning<'c, C> {
    pub fn new(client: &'c Client<C>) -> Self {
        Self { client }
    }

    /// Creates a job that fine-tunes a specified model from a given dataset.
    ///
    /// Response includes details of the enqueued job including job status and the name of the fine-tuned models once complete.
    ///
    /// [Learn more about Fine-tuning](https://platform.openai.com/docs/guides/fine-tuning)
    #[crate::byot(T0 = serde::Serialize, R = serde::de::DeserializeOwned)]
    pub async fn create(
        &self,
        request: CreateFineTuningJobRequest,
    ) -> Result<FineTuningJob, OpenAIError> {
        self.client.post("/fine_tuning/jobs", request).await
    }

    /// List your organization's fine-tuning jobs
    #[crate::byot(T0 = serde::Serialize, T1 = serde::Serialize, R = serde::de::DeserializeOwned)]
    pub async fn list_paginated<Q>(
        &self,
        query: &Q,
    ) -> Result<ListPaginatedFineTuningJobsResponse, OpenAIError>
    where
        Q: Serialize + ?Sized,
    {
        self.client
            .get_with_query("/fine_tuning/jobs", &query)
            .await
    }

    /// Gets info about the fine-tune job.
    ///
    /// [Learn more about Fine-tuning](https://platform.openai.com/docs/guides/fine-tuning)
    #[crate::byot(T0 = std::fmt::Display, R = serde::de::DeserializeOwned)]
    pub async fn retrieve(&self, fine_tuning_job_id: &str) -> Result<FineTuningJob, OpenAIError> {
        self.client
            .get(format!("/fine_tuning/jobs/{fine_tuning_job_id}").as_str())
            .await
    }

    /// Immediately cancel a fine-tune job.
    #[crate::byot(T0 = std::fmt::Display, R = serde::de::DeserializeOwned)]
    pub async fn cancel(&self, fine_tuning_job_id: &str) -> Result<FineTuningJob, OpenAIError> {
        self.client
            .post(
                format!("/fine_tuning/jobs/{fine_tuning_job_id}/cancel").as_str(),
                (),
            )
            .await
    }

    /// Get fine-grained status updates for a fine-tune job.
    #[crate::byot(T0 = std::fmt::Display, T1 = serde::Serialize, R = serde::de::DeserializeOwned)]
    pub async fn list_events<Q>(
        &self,
        fine_tuning_job_id: &str,
        query: &Q,
    ) -> Result<ListFineTuningJobEventsResponse, OpenAIError>
    where
        Q: Serialize + ?Sized,
    {
        self.client
            .get_with_query(
                format!("/fine_tuning/jobs/{fine_tuning_job_id}/events").as_str(),
                &query,
            )
            .await
    }

    #[crate::byot(T0 = std::fmt::Display, T1 = serde::Serialize, R = serde::de::DeserializeOwned)]
    pub async fn list_checkpoints<Q>(
        &self,
        fine_tuning_job_id: &str,
        query: &Q,
    ) -> Result<ListFineTuningJobCheckpointsResponse, OpenAIError>
    where
        Q: Serialize + ?Sized,
    {
        self.client
            .get_with_query(
                format!("/fine_tuning/jobs/{fine_tuning_job_id}/checkpoints").as_str(),
                &query,
            )
            .await
    }
}