deepwiki-rs 1.5.0

deepwiki-rs(also known as Litho) is a high-performance automatic generation engine for C4 architecture documentation, developed using Rust. It can intelligently analyze project structures, identify core components, parse dependency relationships, and leverage large language models (LLMs) to automatically generate professional architecture documentation.
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use crate::{
    config::LLMConfig, llm::client::types::TokenUsage, utils::token_estimator::TokenEstimator,
};

use std::sync::LazyLock;

static TOKEN_ESTIMATOR: LazyLock<TokenEstimator> = LazyLock::new(|| TokenEstimator::new());

pub fn evaluate_befitting_model(
    llm_config: &LLMConfig,
    system_prompt: &str,
    user_prompt: &str,
) -> (String, Option<String>) {
    if system_prompt.len() + user_prompt.len() <= 32 * 1024 {
        return (
            llm_config.model_efficient.clone(),
            Some(llm_config.model_powerful.clone()),
        );
    }
    return (llm_config.model_powerful.clone(), None);
}

/// Estimate token usage (based on text length)
pub fn estimate_token_usage(input_text: &str, output_text: &str) -> TokenUsage {
    // Rough estimate: 1 token ≈ 4 characters (English) or ~1.5 characters (Chinese)
    let input_estimate = TOKEN_ESTIMATOR.estimate_tokens(input_text);
    let output_estimate = TOKEN_ESTIMATOR.estimate_tokens(output_text);
    TokenUsage::new(
        input_estimate.estimated_tokens,
        output_estimate.estimated_tokens,
    )
}