deep_causality_discovery 0.4.1

/*
 * SPDX-License-Identifier: MIT
 * Copyright (c) 2023 - 2026. The DeepCausality Authors and Contributors. All Rights Reserved.
 */
use crate::{AnalyzeError, FinalizeError};
use std::fmt::Display;

/// A wrapper struct holding the results of an analysis as a vector of strings.
///
/// Each string typically represents a human-readable line of the analysis report,
/// such as the interpretation of a specific causal influence.
#[derive(Debug)]
pub struct ProcessAnalysis(pub Vec<String>);

/// A wrapper struct holding the final, formatted output of the CDL pipeline.
///
/// This struct implements the `Display` trait, allowing it to be easily printed
/// to the console or written to a file.
#[derive(Debug)]
pub struct ProcessFormattedResult(pub String);

impl Display for ProcessFormattedResult {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{}", self.0)
    }
}

/// Defines the contract for analyzing the raw results of a causal discovery algorithm.
///
/// Each algorithm has its own analyzer, typed to its own result and configuration
/// via the associated [`Input`](ProcessResultAnalyzer::Input) and
/// [`Config`](ProcessResultAnalyzer::Config) types. This keeps the SURD and BRCD
/// analyzers statically distinct while both produce a common [`ProcessAnalysis`]
/// the formatter can render uniformly.
pub trait ProcessResultAnalyzer<T> {
    /// The concrete discovery result this analyzer interprets (e.g. `SurdResult<T>`).
    type Input;
    /// The configuration that guides the interpretation (e.g. `SurdAnalyzeConfig`).
    type Config;

    /// Analyzes the raw causal discovery result into a human-readable analysis.
    ///
    /// # Arguments
    ///
    /// * `input` - A reference to the algorithm's result.
    /// * `config` - The configuration guiding the interpretation.
    ///
    /// # Returns
    ///
    /// A `Result` containing a `ProcessAnalysis` struct, which holds the lines of the
    /// generated report.
    ///
    /// # Errors
    ///
    /// Returns an `AnalyzeError` if the analysis cannot be completed.
    fn analyze(
        &self,
        input: &Self::Input,
        config: &Self::Config,
    ) -> Result<ProcessAnalysis, AnalyzeError>;
}

/// Defines the contract for formatting an analysis into a final output string.
///
/// Implementors of this trait take the structured analysis from a `ProcessResultAnalyzer`
/// and render it into a final presentable format, such as a console-friendly string.
pub trait ProcessResultFormatter {
    /// Formats the processed analysis into a final string representation.
    ///
    /// # Arguments
    ///
    /// * `analysis` - A reference to the `ProcessAnalysis` struct containing the
    ///   interpreted results.
    ///
    /// # Returns
    ///
    /// A `Result` containing a `ProcessFormattedResult`, which wraps the final
    /// formatted string.
    ///
    /// # Errors
    ///
    /// Returns a `FinalizeError` if formatting fails.
    fn format(&self, analysis: &ProcessAnalysis) -> Result<ProcessFormattedResult, FinalizeError>;
}