#!/usr/bin/env zsh

compile() {
    if [ $# -lt 2 ]; then
        echo "usage: compile [clang|gcc] {debug|release} [flags...] {source file}" >&2
        return 1
    fi

    local sepples=0
    local CC=gcc
    local CXX=g++
    local our_flags=(-I.)

    maybe_include() {
        [ -d "$1" ] && our_flags+=("-I$1")
    }
    maybe_include "-I$HOME/opt/local/include"
    maybe_include "-I$HOME/src/ustl"

    local debug_flags=(-O1 -g);
    local release_flags=(-Ofast -march=native -g0 -fomit-frame-pointer -s -DNDEBUG)
    local dr_flags=(-Ofast -march=native -g -fomit-frame-pointer -DNDEBUG)

    if [ -e /usr/bin/pprof ]; then
        local malloc=(-ltcmalloc -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-free)
        debug_flags+=($malloc[@])
        derelease_flags+=($malloc[@])
        derelease_flags+=(-lprofiler)
    fi

    local file=${@[-1]}
    [ "${file##*.}" = "c" ] || [ "${file##*.}" = "h" ] || sepples=1

    { [ $1 = clang ] && CC="clang" && CXX="clang++" && shift } || \
    { [ $1 = gcc ] && CC="gcc" && CXX="g++" && shift }

    if [ CC=clang ]; then
        debug_flags+=(-ftrapv)
        if [ -z $MSYSTEM ]; then # only available on linux
            debug_flags+=(-fsanitize=undefined) # this SHOULD work with mingw,
                                                # but it fails to link.
            debug_flags+=(-fsanitize=address)
            debug_flags+=(-flto -fsanitize=cfi)
        fi
    fi

    { [ $1 = debug ] && our_flags+=($debug_flags) && shift } || \
    { [ $1 = release ] && our_flags+=($release_flags) && shift } || \
    { [ $1 = derelease ] && our_flags+=($dr_flags) && shift } || \
    { echo "please specify either debug or (de)release" >&2; return 1 }

    # TODO add static option

    local compiler=
    if [ $sepples -eq 1 ]; then
        compiler=$CXX
        std="-std=gnu++1z"
    else
        compiler=$CC
        std="-std=gnu11"
    fi

    local flags=(${@[1,-2]})

    local out=/tmp/${${file%%.*}##*/}

    $compiler $std ${our_flags[@]} ${flags[@]} $file -o $out && echo "$out"
}

compile "$@"