/// Parses 16-byte array to UUID string format
pub fn parse_uuid(bytes: &[u8; 16]) -> String {
    // UUID format: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
    // 4-2-2-2-6 bytes
    format!(
        "{:02x}{:02x}{:02x}{:02x}-{:02x}{:02x}-{:02x}{:02x}-{:02x}{:02x}-{:02x}{:02x}{:02x}{:02x}{:02x}{:02x}",
        bytes[0], bytes[1], bytes[2], bytes[3],
        bytes[4], bytes[5],
        bytes[6], bytes[7],
        bytes[8], bytes[9],
        bytes[10], bytes[11], bytes[12], bytes[13], bytes[14], bytes[15]
    )
}

/// Safely converts C string buffer to Rust String
pub fn parse_c_string(buf: &[i8]) -> String {
    let bytes: Vec<u8> = buf
        .iter()
        .take_while(|&&c| c != 0)
        .map(|&c| c as u8)
        .collect();
    String::from_utf8_lossy(&bytes).into_owned()
}

/// Formats any Display error to "Error: {}" string
pub fn err_to_string<E: std::fmt::Display>(e: E) -> String {
    format!("Error: {}", e)
}

/// Finds memory patterns in text using parentheses parsing
pub fn find_memory_pattern(text: &str) -> Option<(usize, &str)> {
    // Find the last parenthesis that contains the memory pattern
    let mut last_match = None;
    let mut chars = text.char_indices().peekable();

    while let Some((start_idx, ch)) = chars.next() {
        if ch == '(' {
            // Find the closing parenthesis
            let remaining = &text[start_idx + 1..];
            if let Some(close_pos) = remaining.find(')') {
                let content = &remaining[..close_pos];

                // Check if this looks like memory info
                if is_memory_pattern(content) {
                    last_match = Some((start_idx, content));
                }
            }
        }
    }

    last_match
}

/// Validates if content matches memory pattern format
pub fn is_memory_pattern(content: &str) -> bool {
    // Check if content matches pattern like "8128 MiB, 8128 MiB free"
    // Must contain: numbers, "MiB", comma, "free"
    if !(content.contains("MiB") && content.contains("free") && content.contains(',')) {
        return false;
    }

    let parts: Vec<&str> = content.split(',').collect();
    if parts.len() != 2 {
        return false;
    }

    parts.iter().all(|part| {
        let part = part.trim();
        // Each part should start with a number and contain "MiB"
        part.split_whitespace()
            .next()
            .map_or(false, |first_word| first_word.parse::<i32>().is_ok())
            && part.contains("MiB")
    })
}