use crate::error;

pub const EXCLUDE_PATTERNS: [(&str, &str); 1] =
    [("ansi_colors", r"[[:cntrl:]]\[([0-9]{1,2};)?([0-9]{1,2})?m")];

/// Holds all the regex patterns that are currently supported.
///
/// The email address was obtained at https://www.regular-expressions.info/email.html.
/// Others were obtained from Ferran Basora.
pub const PATTERNS: [(&str, &str); 16] = [
    ("markdown-url", r"\[[^]]*\]\(([^)]+)\)"),
    (
        "url",
        r"((https?://|git@|git://|ssh://|ftp://|file:///)[^ \(\)\[\]\{\}]+)",
    ),
    ("email", r"\b[A-z0-9._%+-]+@[A-z0-9.-]+\.[A-z]{2,}\b"),
    ("diff-a", r"--- a/([^ ]+)"),
    ("diff-b", r"\+\+\+ b/([^ ]+)"),
    ("docker", r"sha256:([0-9a-f]{64})"),
    ("path", r"(([.\w\-@~]+)?(/[.\w\-@]+)+)"),
    ("hexcolor", r"#[0-9a-fA-F]{6}"),
    (
        "uuid",
        r"[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}",
    ),
    (
        "version",
        r"(v?\d{1,4}\.\d{1,4}(\.\d{1,4})?(-(alpha|beta|rc)(\.\d)?)?)[^.0-9s]",
    ),
    ("ipfs", r"Qm[0-9a-zA-Z]{44}"),
    ("sha", r"[0-9a-f]{7,40}"),
    ("ipv4", r"\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}"),
    ("ipv6", r"[A-f0-9:]+:+[A-f0-9:]+[%\w\d]+"),
    ("mem-address", r"0x[0-9a-fA-F]+"),
    ("digits", r"[0-9]{4,}"),
];

/// Type-safe string Pattern Name (newtype).
#[derive(Debug)]
pub struct NamedPattern(pub String, pub String);

/// Parse a name string into `NamedPattern`, used during CLI parsing.
pub fn parse_pattern_name(src: &str) -> Result<NamedPattern, error::ParseError> {
    match PATTERNS.iter().find(|&(name, _pattern)| name == &src) {
        Some((name, pattern)) => Ok(NamedPattern(name.to_string(), pattern.to_string())),
        None => Err(error::ParseError::UnknownPatternName),
    }
}