#!/bin/bash

OPTIMIZATION="-O2"  # Enable optimization.
DEBUG=1             # Compile with debug UI.
IMGUI=1             # Compile ImGui libs. Our custom ImGui functions still compile on zero.
THREADED=1          # Compile with threading. Useful to disable when stepping through the renderer.
WINDOWS=0           # Compile for Windows with Mingw.
ARM=0               # Compile on ARM machines.
PACKEDRGB=0         # Use 4x4 chunks for the software rasterizer. Isn't actually faster at the moment.
PERF=0              # Print cycle stats.

FFMPEG_LIBS="
    libavdevice
    libavformat
    libavfilter
    libavcodec
    libswresample
    libswscale
    libavutil
"

IMGUI_FILES="
    imgui
    imgui_demo
    imgui_draw
    imgui_tables
    imgui_widgets
"

IMGUI_FILES_IMPL="
    imgui_impl_sdl
    imgui_impl_opengl3
"

WARNING_FLAGS="
    -Wall -Wextra \
    -Wno-unused-function -Wno-unused-variable -Wno-unused-parameter -Wno-unused-but-set-variable \
    -Wno-missing-field-initializers -Wno-sign-compare -Wno-unused-but-set-parameter \
    -Wno-missing-braces -Wno-format-security \
    -fno-exceptions -Wno-strict-aliasing \
    -Wno-write-strings
"

if [[ "$DEBUG" == 1 ]]; then
WARNING_FLAGS="$WARNING_FLAGS -DDEBUG=1"
fi
if [[ "$THREADED" == 1 ]]; then
WARNING_FLAGS="$WARNING_FLAGS -DTHREADED=1"
fi
if [[ "$WINDOWS" == 1 ]]; then
WARNING_FLAGS="$WARNING_FLAGS -DWINDOWS=1"
fi
if [[ "$ARM" == 1 ]]; then
WARNING_FLAGS="$WARNING_FLAGS -DARM=1"
ADDITIONAL_FLAGS="
    -march=armv8.5-a+sve
"
else
ADDITIONAL_FLAGS="
    -march=native
"
fi
if [[ "$PACKEDRGB" == 1 ]]; then
WARNING_FLAGS="$WARNING_FLAGS -DPACKEDRGB=1"
fi
if [[ "$PERF" == 1 ]]; then
WARNING_FLAGS="$WARNING_FLAGS -DPERF=1"
fi

if [[ "$OSTYPE" =~ ^darwin ]]; then
IMGUI_FLAGS="
    -std=c++11 -Iimgui -Iimgui/backends $OPTIMIZATION -Wall -Wformat `sdl2-config --cflags` -I/usr/local/include -I/opt/local/include -c
"
else
IMGUI_FLAGS="
    -Iimgui -Iimgui/backends $OPTIMIZATION -Wall -Wformat `sdl2-config --cflags` -c
"
fi

if [[ "$OSTYPE" =~ ^darwin ]]; then
    SDL_ARGS="`sdl2-config --cflags` -framework OpenGL -ldl `sdl2-config --libs`"
else
    SDL_ARGS="`sdl2-config --cflags` -lGL -ldl `sdl2-config --libs`"
fi

GLAD_FLAGS="
    -Ilib/glad/include
"


clang $IMGUI_FLAGS -o bin/my_imgui_internal_widgets.o my_imgui_internal_widgets.cpp

if [[ "$IMGUI" == 1 ]]; then
    for i in $IMGUI_FILES
    do
        clang $IMGUI_FLAGS -o bin/$i.o imgui/$i.cpp
    done
    for i in $IMGUI_FILES_IMPL
    do
        clang $IMGUI_FLAGS -o bin/$i.o imgui/backends/$i.cpp
    done
fi

if [[ "$WINDOWS" == 1 ]]; then
clang++ $OPTIMIZATION $WARNING_FLAGS -target x86_64-pc-windows-gnu -march=x86-64-v3 -I .. -Iimgui -Iimgui/backends \
    main.cpp imgui/imgui*.cpp imgui/backends/imgui_impl_sdl.cpp imgui/backends/imgui_impl_opengl3.cpp \
    -I/usr/x86_64-w64-mingw32/include/SDL2 -I/usr/x86_64-w64-mingw32/include/GL  \
    -lmingw32 -lopengl32 -lSDL2main -lSDL2 -llibavcodec -llibswscale -llibavformat -llibavutil \
    -o bin/real2d
else
clang lib/glad.c $GLAD_FLAGS  -I/usr/local/include -I/opt/local/include -c  \
    $WARNING_FLAGS $OPTIMIZATION $ADDITIONAL_FLAGS -o bin/glad.o
clang main.cpp  $WARNING_FLAGS $OPTIMIZATION $ADDITIONAL_FLAGS -o bin/real2d bin/*.o  \
   $GLAD_FLAGS \
   -std=c++11 -lstdc++ -Iimgui -Iimgui/backends  \
   $SDL_ARGS \
   -I . \
   -lm -I /usr/local/include $(pkg-config --cflags --libs $FFMPEG_LIBS)
fi