#!/bin/bash
set -euo pipefail

# Usage: TARGET=x86_64-pc-windows-gnu .github/scripts/build.sh

# Set linkers for cross-compilation targets using clang

case "$TARGET" in
    x86_64-unknown-linux-gnu)
        OS=LINUX
	EXE=radiance
	STRIP=strip
        export CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_LINKER="gcc"
	;;
    aarch64-unknown-linux-gnu)
        OS=LINUX
	EXE=radiance
	STRIP=aarch64-linux-gnu-strip
        export CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER="aarch64-linux-gnu-gcc"
	;;
    x86_64-pc-windows-gnu)
        OS=WINDOWS
	EXE=radiance.exe
	STRIP=x86_64-w64-mingw32-strip
	WINDRES=x86_64-w64-mingw32-windres
	;;
    x86_64-apple-darwin)
        OS=MACOS
	EXE=radiance
	STRIP=strip
	;;
    aarch64-apple-darwin)
        OS=MACOS
	EXE=radiance
	STRIP=strip
	;;
    *)
        echo "Unknown TARGET" >&2
	exit 1
	;;
esac

LIBMPV_STATIC_BUILD="$(cd "../libmpv-static-build" && pwd)"

# Set PKG_CONFIG_PATH based on target
export PKG_CONFIG_LIBDIR="${LIBMPV_STATIC_BUILD}/${TARGET}/output/lib/pkgconfig"
export PKG_CONFIG_PATH="$PKG_CONFIG_LIBDIR"
export PKG_CONFIG_ALLOW_CROSS=1

# Get all the static library dependencies
LIBS=$(pkg-config --static --libs mpv)

# Convert pkg-config output to RUSTFLAGS format
RUSTFLAGS=""

# Add all library flags, excluding -lpthread and -lstdc++ (we'll handle these separately)
for flag in $LIBS; do
  if [[ $flag == -l* ]] || [[ $flag == -L* ]]; then
    # Skip -lpthread and -lstdc++ since we'll link them statically
    if [[ $flag != "-lpthread" ]] && [[ $flag != "-lstdc++" ]]; then
      RUSTFLAGS="$RUSTFLAGS -C link-arg=$flag"
    fi
  fi
done

# Platform-specific linking
case "$OS" in
  WINDOWS)
    cat <<EOF >/tmp/radiance_info.rc
0 ICON "exe_icon.ico"
1 VERSIONINFO
FILEVERSION     1,0,0,0
PRODUCTVERSION  1,0,0,0
BEGIN
  BLOCK "StringFileInfo"
  BEGIN
    BLOCK "040904E4"
    BEGIN
      VALUE "CompanyName", "Radiance"
      VALUE "FileDescription", "Radiance"
      VALUE "FileVersion", "1.0"
      VALUE "InternalName", "radiance"
      VALUE "OriginalFilename", "radiance.exe"
      VALUE "ProductName", "Radiance"
      VALUE "ProductVersion", "1.0"
    END
  END
  BLOCK "VarFileInfo"
  BEGIN
    VALUE "Translation", 0x409, 1252
  END
END
EOF
    $WINDRES /tmp/radiance_info.rc /tmp/radiance_info.o

    RUSTFLAGS="$RUSTFLAGS -C link-arg=/tmp/radiance_info.o"

    RUSTFLAGS="$RUSTFLAGS -C link-arg=-Wl,--allow-multiple-definition"
    # Wrap all static libraries in a group to resolve circular dependencies
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-Wl,-Bstatic"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-Wl,--start-group"
    # Force static linking of libgcc, libgcc_eh, libstdc++, libwinpthread, and libmingw32
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-lmingw32"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-lwinpthread"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-lgcc_eh"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-lgcc"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-lstdc++"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-Wl,--end-group"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-Wl,-Bdynamic"
    # MinGW runtime libraries (mingwex static, msvcrt uses system default CRT)
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-Wl,--start-group"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-Wl,-Bstatic"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-lmingwex"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-Wl,-Bdynamic"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-lmsvcrt"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-Wl,--end-group"
    # Windows system libraries (dynamically linked)
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-lkernel32"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-ladvapi32"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-lshell32"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-lole32"
    ;;
  LINUX)
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-Wl,-Bstatic"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-lstdc++"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-lgcc"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-Wl,-Bdynamic"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-lc"
    ;;
  MACOS)
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-framework -C link-arg=Cocoa"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-framework -C link-arg=IOKit"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-framework -C link-arg=CoreFoundation"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-framework -C link-arg=CoreVideo"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-framework -C link-arg=CoreAudio"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-framework -C link-arg=AudioToolbox"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-framework -C link-arg=AVFoundation"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-framework -C link-arg=OpenGL"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-framework -C link-arg=CoreMedia"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-framework -C link-arg=VideoToolbox"
    RUSTFLAGS="$RUSTFLAGS -C link-arg=-framework -C link-arg=DiskArbitration"

    export RADIANCE_ADDITIONAL_PATH="/usr/local/bin:/usr/local/sbin:/opt/homebrew/bin:/opt/homebrew/sbin"
    ;;
  *)
    echo "Unknown target: $TARGET" >&2
    exit 1
    ;;
esac

export RUSTFLAGS
echo "Generated RUSTFLAGS: $RUSTFLAGS"

cargo build --release --target "$TARGET"
$STRIP "target/${TARGET}/release/${EXE}"