class Postgresql < Formula
  desc "Object-relational database system"
  homepage "https://www.postgresql.org/"
  url "https://ftp.postgresql.org/pub/source/v13.1/postgresql-13.1.tar.bz2"
  sha256 "12345c83b89aa29808568977f5200d6da00f88a035517f925293355432ffe61f"
  license "PostgreSQL"
  head "https://github.com/postgres/postgres.git"

  livecheck do
    url "https://www.postgresql.org/docs/current/static/release.html"
    regex(/Release v?(\d+(?:\.\d+)*)/i)
  end

  bottle do
    sha256 "e4d523c7171f265b340df22a88ff78e6fba4aed46afcf3f4e5bd4ac4b94e8a16" => :big_sur
    sha256 "13939e578f0a48c78966c2527dc48391b19650b51f7489767b5237e3bab16793" => :catalina
    sha256 "1826c98f6d117bd040fbb307c1c95dfa2dee6ff8647ec8010e1b79386aa59eb0" => :mojave
  end

  depends_on "pkg-config" => :build
  depends_on "icu4c"

  # GSSAPI provided by Kerberos.framework crashes when forked.
  # See https://github.com/Homebrew/homebrew-core/issues/47494.
  depends_on "krb5"

  depends_on "openssl@1.1"
  depends_on "readline"

  uses_from_macos "libxml2"
  uses_from_macos "libxslt"
  uses_from_macos "perl"

  on_linux do
    depends_on "util-linux"
  end

  def install
    ENV.prepend "LDFLAGS", "-L#{Formula["openssl@1.1"].opt_lib} -L#{Formula["readline"].opt_lib}"
    ENV.prepend "CPPFLAGS", "-I#{Formula["openssl@1.1"].opt_include} -I#{Formula["readline"].opt_include}"

    args = %W[
      --disable-debug
      --prefix=#{prefix}
      --datadir=#{HOMEBREW_PREFIX}/share/postgresql
      --libdir=#{HOMEBREW_PREFIX}/lib
      --includedir=#{HOMEBREW_PREFIX}/include
      --sysconfdir=#{etc}
      --docdir=#{doc}
      --enable-thread-safety
      --with-bonjour
      --with-gssapi
      --with-icu
      --with-ldap
      --with-libxml
      --with-libxslt
      --with-openssl
      --with-pam
      --with-perl
      --with-tcl
      --with-uuid=e2fs
    ]

    # PostgreSQL by default uses xcodebuild internally to determine this,
    # which does not work on CLT-only installs.
    args << "PG_SYSROOT=#{MacOS.sdk_path}" if MacOS.sdk_root_needed?

    system "./configure", *args
    system "make"
    system "make", "install-world", "datadir=#{pkgshare}",
                                    "libdir=#{lib}",
                                    "pkglibdir=#{lib}/postgresql",
                                    "includedir=#{include}",
                                    "pkgincludedir=#{include}/postgresql",
                                    "includedir_server=#{include}/postgresql/server",
                                    "includedir_internal=#{include}/postgresql/internal"
  end

  def post_install
    return if ENV["CI"]

    (var/"log").mkpath
    postgresql_datadir.mkpath
    system "#{bin}/initdb", "--locale=C", "-E", "UTF-8", postgresql_datadir unless pg_version_exists?
  end

  def postgresql_datadir
    var/"postgres"
  end

  def postgresql_log_path
    var/"log/postgres.log"
  end

  def pg_version_exists?
    (postgresql_datadir/"PG_VERSION").exist?
  end

  def caveats
    <<~EOS
      To migrate existing data from a previous major version of PostgreSQL run:
        brew postgresql-upgrade-database

      This formula has created a default database cluster with:
        initdb --locale=C -E UTF-8 #{postgresql_datadir}
      For more details, read:
        https://www.postgresql.org/docs/#{version.major}/app-initdb.html
    EOS
  end

  plist_options manual: "pg_ctl -D #{HOMEBREW_PREFIX}/var/postgres start"

  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_bin}/postgres</string>
          <string>-D</string>
          <string>#{postgresql_datadir}</string>
        </array>
        <key>RunAtLoad</key>
        <true/>
        <key>WorkingDirectory</key>
        <string>#{HOMEBREW_PREFIX}</string>
        <key>StandardOutPath</key>
        <string>#{postgresql_log_path}</string>
        <key>StandardErrorPath</key>
        <string>#{postgresql_log_path}</string>
      </dict>
      </plist>
    EOS
  end

  test do
    system "#{bin}/initdb", testpath/"test" unless ENV["CI"]
    assert_equal "#{HOMEBREW_PREFIX}/share/postgresql", shell_output("#{bin}/pg_config --sharedir").chomp
    assert_equal "#{HOMEBREW_PREFIX}/lib", shell_output("#{bin}/pg_config --libdir").chomp
    assert_equal "#{HOMEBREW_PREFIX}/lib/postgresql", shell_output("#{bin}/pg_config --pkglibdir").chomp
  end
end