# typed: false
# frozen_string_literal: true

# USAGE: `depends_on MacfuseRequirement`
class MacfuseRequirement < Requirement
  fatal true

  satisfy(build_env: false) { self.class.binary_osxfuse_installed? }

  def self.binary_osxfuse_installed?
    File.exist?("/usr/local/include/fuse.h") &&
      !File.symlink?("/usr/local/include")
  end

  env do
    ENV.append_path "PKG_CONFIG_PATH", HOMEBREW_LIBRARY/"Homebrew/os/mac/pkgconfig/fuse"
  end

  def message
    "This formula requires MacFUSE. Please run `brew install --cask macfuse` first."
  end
end

# Add `setup_fuse` to base Formula class, for use by FUSE formulae
class Formula
  def need_alt_fuse?
    HOMEBREW_PREFIX.to_s != "/usr/local"
  end

  def alt_fuse_root
    buildpath/"temp"
  end

  def fuse_cmake_args
    return unless need_alt_fuse?

    %W[
      -DCMAKE_INCLUDE_PATH=#{alt_fuse_root}/include/fuse;#{alt_fuse_root}/include
      -DCMAKE_LIBRARY_PATH=#{alt_fuse_root}/lib
      -DCMAKE_CXX_FLAGS=-I#{alt_fuse_root}/include/fuse\ -D_USE_FILE_OFFSET_BITS=64
      -DPKG_CONFIG=#{fuse_pkgconfig}
      -DPKG_CONFIG_EXECUTABLE=#{fuse_pkgconfig}
    ]
    # -DFUSE_INCLUDE_DIR=#{alt_fuse_root}/include/fuse
    # -DFUSE_LIBRARIES=#{alt_fuse_root}/lib/libfuse.dylib
  end

  def setup_fuse_includes
    mkdir "#{alt_fuse_root}/include" do
      Dir["/usr/local/include/fuse*"].each { |f| cp_r f, "." }
    end
  end

  def setup_fuse_libs
    mkdir "#{alt_fuse_root}/lib" do
      Dir["/usr/local/lib/*fuse*"].each { |f| cp_r f, "." }
    end
  end

  def setup_fuse_pkgconfig
    mkdir "#{alt_fuse_root}/bin" do
      cp path/"../../lib/fuse-pkg-config", "."
      inreplace "fuse-pkg-config", "%FUSE_ROOT%", "#{alt_fuse_root}"
    end
  end

  def fuse_pkgconfig
    return "#{alt_fuse_root}/bin/fuse-pkg-config" if need_alt_fuse?
    "pkg-config"
  end

  def setup_fuse_env
    odebug "Setting up FUSE temp environment under #{alt_fuse_root}"
    setup_fuse_includes
    setup_fuse_libs
    setup_fuse_pkgconfig
    Dir.glob("#{alt_fuse_root}/**/*").each { |f| odebug ">>> #{f}" }
  end

  def setup_fuse_flags
    ENV.append "CFLAGS", "-I#{alt_fuse_root}/include"
    ENV.append "CFLAGS", "-I#{alt_fuse_root}/include/fuse"
    ENV.append "CFLAGS", "-D_USE_FILE_OFFSET_BITS=64"
    ENV.append "CPPFLAGS", "-I#{alt_fuse_root}/include"
    ENV.append "CPPFLAGS", "-I#{alt_fuse_root}/include/fuse"
    ENV.append "CPPFLAGS", "-D_USE_FILE_OFFSET_BITS=64"
    ENV.append "CXXFLAGS", "-I#{alt_fuse_root}/include"
    ENV.append "CXXFLAGS", "-I#{alt_fuse_root}/include/fuse"
    ENV.append "CXXFLAGS", "-D_USE_FILE_OFFSET_BITS=64"
    ENV.append "LDFLAGS", "-L#{alt_fuse_root}/lib"
    ENV.append "CGO_CPPFLAGS", "-I#{alt_fuse_root}/include"
    ENV.append "CGO_CPPFLAGS", "-D_USE_FILE_OFFSET_BITS=64"
    ENV.append "CGO_LDFLAGS", "-L#{alt_fuse_root}/lib"
    ENV.append "PKG_CONFIG", "#{fuse_pkgconfig}"
  end

  def setup_fuse
    return unless need_alt_fuse?

    setup_fuse_env
    setup_fuse_flags
  end
end