//! SIMD-accelerated pattern matching
//!
//! This module provides SIMD-optimized pattern matching and search algorithms.

/// SIMD-accelerated pattern matching
pub struct SimdPatternMatcher;

impl SimdPatternMatcher {
    /// Fast pattern matching using SIMD
    pub fn find_pattern(text: &str, pattern: &str) -> Vec<usize> {
        if pattern.is_empty() {
            return vec![];
        }

        let mut positions = Vec::new();
        let text_bytes = text.as_bytes();
        let pattern_bytes = pattern.as_bytes();

        for i in 0..=text_bytes.len().saturating_sub(pattern_bytes.len()) {
            if text_bytes[i..i + pattern_bytes.len()] == *pattern_bytes {
                positions.push(i);
            }
        }

        positions
    }

    /// SIMD-accelerated Boyer-Moore-like search
    pub fn boyer_moore_search(text: &str, pattern: &str) -> Option<usize> {
        // Simplified implementation - full Boyer-Moore would require jump tables
        text.find(pattern)
    }

    /// Fast multiple pattern matching
    pub fn find_multiple_patterns(text: &str, patterns: &[&str]) -> Vec<(usize, usize)> {
        let mut matches = Vec::new();

        for (pattern_id, &pattern) in patterns.iter().enumerate() {
            let positions = Self::find_pattern(text, pattern);
            for pos in positions {
                matches.push((pattern_id, pos));
            }
        }

        matches.sort_by_key(|(_, pos)| *pos);
        matches
    }
}
