class Php < Formula
  desc "General-purpose scripting language"
  homepage "https://php.net/"
  url "https://php.net/get/php-7.2.4.tar.xz/from/this/mirror"
  sha256 "7916b1bd148ddfd46d7f8f9a517d4b09cd8a8ad9248734e7c8dd91ef17057a88"

  bottle do
    sha256 "465136132568d7b316e8cec31569aa67af7ce8b6d4e472a55d78c0fbdf22401b" => :high_sierra
    sha256 "14da8ba8723bb18884271e0e4c3df9e4be5317529bcaa0cf3c7ef30191c2cdc6" => :sierra
    sha256 "13bd8badd9da31e5f71fa29d624b47a1a18b693f37aa419c552bbe7ba497e4c2" => :el_capitan
  end

  depends_on "httpd" => [:build, :test]
  depends_on "pkg-config" => :build
  depends_on "apr"
  depends_on "apr-util"
  depends_on "argon2"
  depends_on "aspell"
  depends_on "curl" if MacOS.version < :lion
  depends_on "freetds"
  depends_on "freetype"
  depends_on "gettext"
  depends_on "glib"
  depends_on "gmp"
  depends_on "icu4c"
  depends_on "jpeg"
  depends_on "libpng"
  depends_on "libpq"
  depends_on "libsodium"
  depends_on "libzip"
  depends_on "openssl"
  depends_on "pcre"
  depends_on "unixodbc"
  depends_on "webp"

  needs :cxx11

  def install
    # Ensure that libxml2 will be detected correctly in older MacOS
    if MacOS.version == :el_capitan || MacOS.version == :sierra
      ENV["SDKROOT"] = MacOS.sdk_path
    end

    inreplace "configure" do |s|
      s.gsub! "APACHE_THREADED_MPM=`$APXS_HTTPD -V | grep 'threaded:.*yes'`",
              "APACHE_THREADED_MPM="
      s.gsub! "APXS_LIBEXECDIR='$(INSTALL_ROOT)'`$APXS -q LIBEXECDIR`",
              "APXS_LIBEXECDIR='$(INSTALL_ROOT)#{lib}/httpd/modules'"
      s.gsub! "-z `$APXS -q SYSCONFDIR`",
              "-z ''"
    end

    # Update error message in apache sapi to better explain the requirements
    # of using Apache http in combination with php if the non-compatible MPM
    # has been selected. Homebrew has chosen not to support being able to
    # compile a thread safe version of PHP and therefore it is not
    # possible to recompile as suggested in the original message
    inreplace "sapi/apache2handler/sapi_apache2.c",
              "You need to recompile PHP.",
              "Homebrew PHP does not support a thread-safe php binary. "\
              "To use the PHP apache sapi please change "\
              "your httpd config to use the prefork MPM"

    inreplace "sapi/fpm/php-fpm.conf.in", ";daemonize = yes", "daemonize = no"

    # Required due to icu4c dependency
    ENV.cxx11

    # icu4c 61.1 compatability
    ENV.append "CPPFLAGS", "-DU_USING_ICU_NAMESPACE=1"

    config_path = etc/"php/#{php_version}"
    # Prevent homebrew from harcoding path to sed shim in phpize script
    ENV["lt_cv_path_SED"] = "sed"

    args = %W[
      --prefix=#{prefix}
      --localstatedir=#{var}
      --sysconfdir=#{config_path}
      --with-config-file-path=#{config_path}
      --with-config-file-scan-dir=#{config_path}/conf.d
      --enable-bcmath
      --enable-calendar
      --enable-dba
      --enable-dtrace
      --enable-exif
      --enable-ftp
      --enable-fpm
      --enable-intl
      --enable-mbregex
      --enable-mbstring
      --enable-mysqlnd
      --enable-opcache-file
      --enable-pcntl
      --enable-phpdbg
      --enable-phpdbg-webhelper
      --enable-shmop
      --enable-soap
      --enable-sockets
      --enable-sysvmsg
      --enable-sysvsem
      --enable-sysvshm
      --enable-wddx
      --enable-zip
      --with-apxs2=#{Formula["httpd"].opt_bin}/apxs
      --with-bz2
      --with-fpm-user=_www
      --with-fpm-group=_www
      --with-freetype-dir=#{Formula["freetype"].opt_prefix}
      --with-gd
      --with-gettext=#{Formula["gettext"].opt_prefix}
      --with-gmp=#{Formula["gmp"].opt_prefix}
      --with-icu-dir=#{Formula["icu4c"].opt_prefix}
      --with-jpeg-dir=#{Formula["jpeg"].opt_prefix}
      --with-kerberos
      --with-layout=GNU
      --with-ldap
      --with-ldap-sasl
      --with-libedit
      --with-libzip
      --with-mhash
      --with-mysql-sock=/tmp/mysql.sock
      --with-mysqli=mysqlnd
      --with-ndbm
      --with-openssl=#{Formula["openssl"].opt_prefix}
      --with-password-argon2=#{Formula["argon2"].opt_prefix}
      --with-pdo-dblib=#{Formula["freetds"].opt_prefix}
      --with-pdo-mysql=mysqlnd
      --with-pdo-odbc=unixODBC,#{Formula["unixodbc"].opt_prefix}
      --with-pdo-pgsql=#{Formula["libpq"].opt_prefix}
      --with-pgsql=#{Formula["libpq"].opt_prefix}
      --with-pic
      --with-png-dir=#{Formula["libpng"].opt_prefix}
      --with-pspell=#{Formula["aspell"].opt_prefix}
      --with-sodium=#{Formula["libsodium"].opt_prefix}
      --with-unixODBC=#{Formula["unixodbc"].opt_prefix}
      --with-webp-dir=#{Formula["webp"].opt_prefix}
      --with-xmlrpc
      --with-xsl
      --with-zlib
    ]

    if MacOS.version < :lion
      args << "--with-curl=#{Formula["curl"].opt_prefix}"
    else
      args << "--with-curl"
    end

    system "./configure", *args
    system "make"
    system "make", "install"

    # Allow pecl to install outside of Cellar
    extension_dir = Utils.popen_read("#{bin}/php-config --extension-dir").chomp
    orig_ext_dir = File.basename(extension_dir)
    inreplace bin/"php-config", lib/"php", prefix/"pecl"
    inreplace "php.ini-development", "; extension_dir = \"./\"",
      "extension_dir = \"#{HOMEBREW_PREFIX}/lib/php/pecl/#{orig_ext_dir}\""

    config_files = {
      "php.ini-development" => "php.ini",
      "sapi/fpm/php-fpm.conf" => "php-fpm.conf",
      "sapi/fpm/www.conf" => "php-fpm.d/www.conf",
    }
    config_files.each_value do |dst|
      dst_default = config_path/"#{dst}.default"
      rm dst_default if dst_default.exist?
    end
    config_path.install config_files

    unless (var/"log/php-fpm.log").exist?
      (var/"log").mkpath
      touch var/"log/php-fpm.log"
    end
  end

  def caveats
    <<~EOS
      To enable PHP in Apache add the following to httpd.conf and restart Apache:
          LoadModule php7_module #{opt_lib}/httpd/modules/libphp7.so

          <FilesMatch \.php$>
              SetHandler application/x-httpd-php
          </FilesMatch>

      Finally, check DirectoryIndex includes index.php
          DirectoryIndex index.php index.html

      The php.ini and php-fpm.ini file can be found in:
          #{etc}/php/#{php_version}/
    EOS
  end

  def post_install
    pear_prefix = share/"pear"
    pear_files = %W[
      #{pear_prefix}/.depdblock
      #{pear_prefix}/.filemap
      #{pear_prefix}/.depdb
      #{pear_prefix}/.lock
    ]

    %W[
      #{pear_prefix}/.channels
      #{pear_prefix}/.channels/.alias
    ].each do |f|
      chmod 0755, f
      pear_files.concat(Dir["#{f}/*"])
    end

    chmod 0644, pear_files

    # Custom location for extensions installed via pecl
    pecl_path = HOMEBREW_PREFIX/"lib/php/pecl"
    ln_s pecl_path, prefix/"pecl" unless (prefix/"pecl").exist?
    extension_dir = Utils.popen_read("#{bin}/php-config --extension-dir").chomp
    php_basename = File.basename(extension_dir)
    php_ext_dir = opt_prefix/"lib/php"/php_basename

    # fix pear config to install outside cellar
    pear_path = HOMEBREW_PREFIX/"share/pear"
    {
      "php_ini" => etc/"php/#{php_version}/php.ini",
      "php_dir" => pear_path,
      "doc_dir" => pear_path/"doc",
      "ext_dir" => pecl_path/php_basename,
      "bin_dir" => opt_bin,
      "data_dir" => pear_path/"data",
      "cfg_dir" => pear_path/"cfg",
      "www_dir" => pear_path/"htdocs",
      "man_dir" => HOMEBREW_PREFIX/"share/man",
      "test_dir" => pear_path/"test",
      "php_bin" => opt_bin/"php",
    }.each do |key, value|
      value.mkpath if key =~ /(?<!bin|man)_dir$/
      system bin/"pear", "config-set", key, value, "system"
    end

    %w[
      opcache
    ].each do |e|
      ext_config_path = etc/"php/#{php_version}/conf.d/ext-#{e}.ini"
      extension_type = (e == "opcache") ? "zend_extension" : "extension"
      if ext_config_path.exist?
        inreplace ext_config_path,
          /#{extension_type}=.*$/, "#{extension_type}=#{php_ext_dir}/#{e}.so"
      else
        ext_config_path.write <<~EOS
          [#{e}]
          #{extension_type}="#{php_ext_dir}/#{e}.so"
        EOS
      end
    end
  end

  def php_version
    version.to_s.split(".")[0..1].join(".")
  end

  plist_options :manual => "php-fpm"

  def plist; <<~EOS
    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
    <plist version="1.0">
      <dict>
        <key>KeepAlive</key>
        <true/>
        <key>Label</key>
        <string>#{plist_name}</string>
        <key>ProgramArguments</key>
        <array>
          <string>#{opt_sbin}/php-fpm</string>
          <string>--nodaemonize</string>
        </array>
        <key>RunAtLoad</key>
        <true/>
        <key>WorkingDirectory</key>
        <string>#{var}</string>
        <key>StandardErrorPath</key>
        <string>#{var}/log/php-fpm.log</string>
      </dict>
    </plist>
    EOS
  end

  test do
    assert_match /^Zend OPcache$/, shell_output("#{bin}/php -i"), "Zend OPCache extension not loaded"
    system "#{sbin}/php-fpm", "-t"
    system "#{bin}/phpdbg", "-V"
    system "#{bin}/php-cgi", "-m"
    # Prevent SNMP extension to be added
    assert_no_match /^snmp$/, shell_output("#{bin}/php -m"), "SNMP extension doesn't work reliably with Homebrew on High Sierra"
    begin
      require "socket"

      server = TCPServer.new(0)
      port = server.addr[1]
      server_fpm = TCPServer.new(0)
      port_fpm = server_fpm.addr[1]
      server.close
      server_fpm.close

      expected_output = /^Hello world!$/
      (testpath/"index.php").write <<~EOS
        <?php
        echo 'Hello world!';
      EOS
      main_config = <<~EOS
        Listen #{port}
        ServerName localhost:#{port}
        DocumentRoot "#{testpath}"
        ErrorLog "#{testpath}/httpd-error.log"
        ServerRoot "#{Formula["httpd"].opt_prefix}"
        PidFile "#{testpath}/httpd.pid"
        LoadModule authz_core_module lib/httpd/modules/mod_authz_core.so
        LoadModule unixd_module lib/httpd/modules/mod_unixd.so
        LoadModule dir_module lib/httpd/modules/mod_dir.so
        DirectoryIndex index.php
      EOS

      (testpath/"httpd.conf").write <<~EOS
        #{main_config}
        LoadModule mpm_prefork_module lib/httpd/modules/mod_mpm_prefork.so
        LoadModule php7_module #{lib}/httpd/modules/libphp7.so
        <FilesMatch \.(php|phar)$>
          SetHandler application/x-httpd-php
        </FilesMatch>
      EOS

      (testpath/"fpm.conf").write <<~EOS
        [global]
        daemonize=no
        [www]
        listen = 127.0.0.1:#{port_fpm}
        pm = dynamic
        pm.max_children = 5
        pm.start_servers = 2
        pm.min_spare_servers = 1
        pm.max_spare_servers = 3
      EOS

      (testpath/"httpd-fpm.conf").write <<~EOS
        #{main_config}
        LoadModule mpm_event_module lib/httpd/modules/mod_mpm_event.so
        LoadModule proxy_module lib/httpd/modules/mod_proxy.so
        LoadModule proxy_fcgi_module lib/httpd/modules/mod_proxy_fcgi.so
        <FilesMatch \.(php|phar)$>
          SetHandler "proxy:fcgi://127.0.0.1:#{port_fpm}"
        </FilesMatch>
      EOS

      pid = fork do
        exec Formula["httpd"].opt_bin/"httpd", "-X", "-f", "#{testpath}/httpd.conf"
      end
      sleep 3

      assert_match expected_output, shell_output("curl -s 127.0.0.1:#{port}")

      Process.kill("TERM", pid)
      Process.wait(pid)

      fpm_pid = fork do
        exec sbin/"php-fpm", "-y", "fpm.conf"
      end
      pid = fork do
        exec Formula["httpd"].opt_bin/"httpd", "-X", "-f", "#{testpath}/httpd-fpm.conf"
      end
      sleep 3

      assert_match expected_output, shell_output("curl -s 127.0.0.1:#{port}")
    ensure
      if pid
        Process.kill("TERM", pid)
        Process.wait(pid)
      end
      if fpm_pid
        Process.kill("TERM", fpm_pid)
        Process.wait(fpm_pid)
      end
    end
  end
end