#[macro_use]
extern crate lazy_static;

mod validators;
mod worker;

use serde::{Deserialize, Serialize};
use std::{
    fs::read_to_string,
    io::Result,
    ops::{Add, AddAssign},
    path::Path,
    thread::spawn,
};

/// All different types of artifacts that which can be found in a given string
#[derive(Serialize, Deserialize, Default, Debug, Clone)]
pub struct Artifacts {
    /// All found URLs in the given string
    pub urls: Option<Vec<String>>,
    /// All found Domains in the given string
    pub domains: Option<Vec<String>>,
    /// All found Email Addresses in the given string
    pub emails: Option<Vec<String>>,
    /// All found IP Addresses in the given string
    pub ip_address: Option<Vec<String>>,
    /// All found Crypto Addresses in the given string
    pub crypto: Option<Vec<String>>,
    /// All found Registry Keys in the given string
    pub registry_keys: Option<Vec<String>>,
    /// All found SQL Statements in the given string
    pub sql: Option<Vec<String>>,
    /// All found Regular Expressions in the given string
    pub regexes: Option<Vec<String>>,
    /// All found File Paths in the given string
    pub file_paths: Option<Vec<String>>,
}

impl Artifacts {
    pub fn from_file<P: AsRef<Path>>(file: P) -> Result<Option<Self>> {
        //! Extracts Indicators from a given file
        //!
        //! ## Example Usage
        //! ```rust
        //! use ioc_extract::Artifacts;
        //!
        //! let f = "data/sample.txt";
        //! println!("{:?}", Artifacts::from_file(f));
        //! ```
        let f = read_to_string(file)?;
        Ok(Self::from_str(&f))
    }

    pub fn from_str(s: &str) -> Option<Self> {
        //! Extracts Indicators from a given string
        //!
        //! ## Example Usage
        //! ```rust
        //! use ioc_extract::Artifacts;
        //!
        //! let x = "this is an IP address: 192.168.2.11";
        //! println!("{:?}", Artifacts::from_str(x));
        //! ```
        let s1 = s.to_string();
        let s2 = s.to_string();

        let thread_handle1 = spawn(move || worker::by_newline(s1));
        let thread_handle2 = spawn(move || worker::by_whitespace(s2));

        let newline_res = thread_handle1.join().unwrap();
        let whitespace_res = thread_handle2.join().unwrap();

        if newline_res.file_paths.is_none()
            && newline_res.registry_keys.is_none()
            && newline_res.sql.is_none()
            && whitespace_res.regexes.is_none()
            && whitespace_res.crypto.is_none()
            && whitespace_res.emails.is_none()
            && whitespace_res.domains.is_none()
            && whitespace_res.ip_address.is_none()
            && whitespace_res.urls.is_none()
        {
            return None;
        }

        // return the result object
        Some(Artifacts {
            urls: whitespace_res.urls,
            domains: whitespace_res.domains,
            emails: whitespace_res.emails,
            ip_address: whitespace_res.ip_address,
            crypto: whitespace_res.crypto,
            registry_keys: newline_res.registry_keys,
            sql: newline_res.sql,
            regexes: whitespace_res.regexes,
            file_paths: newline_res.file_paths,
        })
    }

    fn combine_options(
        opt1: Option<Vec<String>>,
        opt2: Option<Vec<String>>,
    ) -> Option<Vec<String>> {
        match (opt1, opt2) {
            (Some(mut vec1), Some(vec2)) => {
                vec1.extend(vec2);
                Some(vec1)
            }
            (Some(vec1), None) => Some(vec1),
            (None, Some(vec2)) => Some(vec2),
            (None, None) => None,
        }
    }
}

impl Add for Artifacts {
    type Output = Artifacts;

    fn add(self, other: Artifacts) -> Artifacts {
        Artifacts {
            urls: Artifacts::combine_options(self.urls, other.urls),
            domains: Artifacts::combine_options(self.domains, other.domains),
            emails: Artifacts::combine_options(self.emails, other.emails),
            ip_address: Artifacts::combine_options(self.ip_address, other.ip_address),
            crypto: Artifacts::combine_options(self.crypto, other.crypto),
            registry_keys: Artifacts::combine_options(self.registry_keys, other.registry_keys),
            sql: Artifacts::combine_options(self.sql, other.sql),
            regexes: Artifacts::combine_options(self.regexes, other.regexes),
            file_paths: Artifacts::combine_options(self.file_paths, other.file_paths),
        }
    }
}

impl AddAssign for Artifacts {
    fn add_assign(&mut self, other: Artifacts) {
        self.urls = Artifacts::combine_options(self.urls.clone(), other.urls);
        self.domains = Artifacts::combine_options(self.domains.clone(), other.domains);
        self.emails = Artifacts::combine_options(self.emails.clone(), other.emails);
        self.ip_address = Artifacts::combine_options(self.ip_address.clone(), other.ip_address);
        self.crypto = Artifacts::combine_options(self.crypto.clone(), other.crypto);
        self.registry_keys =
            Artifacts::combine_options(self.registry_keys.clone(), other.registry_keys);
        self.sql = Artifacts::combine_options(self.sql.clone(), other.sql);
        self.regexes = Artifacts::combine_options(self.regexes.clone(), other.regexes);
        self.file_paths = Artifacts::combine_options(self.file_paths.clone(), other.file_paths);
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_extract_ip() {
        let x = "there are ips in this test\n192.168.21.21 and ::ffff:127.0.0.1\nthe cidrs are:\n2001:0DB8:1234::/48 and \n10.0.0.0/33";
        let ioc = Artifacts::from_str(x);
        assert!(ioc.is_some());
        let ips = ioc.unwrap().ip_address;
        assert!(ips.is_some())
    }
}