//! Compiler Wrapper from `LibAFL`

#![deny(rustdoc::broken_intra_doc_links)]
#![deny(clippy::all)]
#![deny(clippy::pedantic)]
#![allow(
    clippy::unreadable_literal,
    clippy::type_repetition_in_bounds,
    clippy::missing_errors_doc,
    clippy::cast_possible_truncation,
    clippy::used_underscore_binding,
    clippy::ptr_as_ptr,
    clippy::missing_panics_doc,
    clippy::missing_docs_in_private_items,
    clippy::module_name_repetitions,
    clippy::unreadable_literal
)]
#![cfg_attr(not(test), warn(
    missing_debug_implementations,
    missing_docs,
    //trivial_casts,
    trivial_numeric_casts,
    unused_extern_crates,
    unused_import_braces,
    unused_qualifications,
    //unused_results
))]
#![cfg_attr(test, deny(
    missing_debug_implementations,
    missing_docs,
    //trivial_casts,
    trivial_numeric_casts,
    unused_extern_crates,
    unused_import_braces,
    unused_qualifications,
    unused_must_use,
    missing_docs,
    //unused_results
))]
#![cfg_attr(
    test,
    deny(
        bad_style,
        dead_code,
        improper_ctypes,
        non_shorthand_field_patterns,
        no_mangle_generic_items,
        overflowing_literals,
        path_statements,
        patterns_in_fns_without_body,
        private_in_public,
        unconditional_recursion,
        unused,
        unused_allocation,
        unused_comparisons,
        unused_parens,
        while_true
    )
)]

use std::{convert::Into, path::Path, process::Command, string::String, vec::Vec};

pub mod cfg;
pub use cfg::{CfgEdge, ControlFlowGraph, EntryBasicBlockInfo, HasWeight};
pub mod clang;
pub use clang::{ClangWrapper, LLVMPasses};

/// `LibAFL` CC Error Type
#[derive(Debug)]
pub enum Error {
    /// CC Wrapper called with invalid arguments
    InvalidArguments(String),
    /// Io error occurred
    Io(std::io::Error),
    /// Something else happened
    Unknown(String),
}

// TODO macOS
/// extension for static libraries
#[cfg(windows)]
pub const LIB_EXT: &str = "lib";
/// extension for static libraries
#[cfg(not(windows))]
pub const LIB_EXT: &str = "a";

/// prefix for static libraries
#[cfg(windows)]
pub const LIB_PREFIX: &str = "";
/// prefix for static libraries
#[cfg(not(windows))]
pub const LIB_PREFIX: &str = "lib";

/// Wrap a compiler hijacking its arguments
pub trait CompilerWrapper {
    /// Set the wrapper arguments parsing a command line set of arguments
    fn parse_args<S>(&mut self, args: &[S]) -> Result<&'_ mut Self, Error>
    where
        S: AsRef<str>;

    /// Add a compiler argument
    fn add_arg<S>(&mut self, arg: S) -> &'_ mut Self
    where
        S: AsRef<str>;

    /// Add a compiler argument only when compiling
    fn add_cc_arg<S>(&mut self, arg: S) -> &'_ mut Self
    where
        S: AsRef<str>;

    /// Add a compiler argument only when linking
    fn add_link_arg<S>(&mut self, arg: S) -> &'_ mut Self
    where
        S: AsRef<str>;

    /// Add compiler arguments
    fn add_args<S>(&mut self, args: &[S]) -> &'_ mut Self
    where
        S: AsRef<str>,
    {
        for arg in args {
            self.add_arg(arg);
        }
        self
    }

    /// Add compiler arguments only when compiling
    fn add_cc_args<S>(&mut self, args: &[S]) -> &'_ mut Self
    where
        S: AsRef<str>,
    {
        for arg in args {
            self.add_cc_arg(arg);
        }
        self
    }

    /// Add compiler arguments only when linking
    fn add_link_args<S>(&mut self, args: &[S]) -> &'_ mut Self
    where
        S: AsRef<str>,
    {
        for arg in args {
            self.add_link_arg(arg);
        }
        self
    }

    /// Link static C lib
    fn link_staticlib<S>(&mut self, dir: &Path, name: S) -> &'_ mut Self
    where
        S: AsRef<str>;

    /// Command to run the compiler
    fn command(&mut self) -> Result<Vec<String>, Error>;

    /// Get if in linking mode
    fn is_linking(&self) -> bool;

    /// Filter out argumets
    fn filter(&self, _args: &mut Vec<String>) {}

    /// Silences `libafl_cc` output
    fn silence(&mut self, value: bool) -> &'_ mut Self;

    /// Returns `true` if `silence` was called with `true`
    fn is_silent(&self) -> bool;

    /// Run the compiler
    fn run(&mut self) -> Result<Option<i32>, Error> {
        let mut args = self.command()?;
        self.filter(&mut args);

        if !self.is_silent() {
            dbg!(args.clone());
        }
        if args.is_empty() {
            return Err(Error::InvalidArguments(
                "The number of arguments cannot be 0".into(),
            ));
        }
        let status = match Command::new(&args[0]).args(&args[1..]).status() {
            Ok(s) => s,
            Err(e) => return Err(Error::Io(e)),
        };
        if !self.is_silent() {
            dbg!(status);
        }
        Ok(status.code())
    }
}