class Sqlite < Formula
  homepage "https://sqlite.org/"
  url "https://www.sqlite.org/2014/sqlite-autoconf-3080704.tar.gz"
  version "3.8.7.4"
  sha1 "70ca0b8884a6b145b7f777724670566e2b4f3cde"

  bottle do
    cellar :any
    sha1 "89e69674e5617d190a0906cf493d90f2a1d9df23" => :yosemite
    sha1 "83853093fc0f839124f45440a90948400c18ebf5" => :mavericks
    sha1 "de28188fb9da216c142922481962628a702e0ce3" => :mountain_lion
  end

  keg_only :provided_by_osx, "OS X provides an older sqlite3."

  option :universal
  option "with-docs", "Install HTML documentation"
  option "without-rtree", "Disable the R*Tree index module"
  option "with-fts", "Enable the FTS module"
  option "with-icu4c", "Enable the ICU module"
  option "with-functions", "Enable more math and string functions for SQL queries"

  depends_on "readline" => :recommended
  depends_on "icu4c" => :optional

  resource "functions" do
    url "https://www.sqlite.org/contrib/download/extension-functions.c?get=25", :using  => :nounzip
    version "2010-01-06"
    sha1 "c68fa706d6d9ff98608044c00212473f9c14892f"
  end

  resource "docs" do
    url "https://www.sqlite.org/2014/sqlite-doc-3080704.zip"
    version "3.8.7.4"
    sha1 "734908373118d61338ca020e3c7dcbd1e0ccd985"
  end

  def install
    ENV.append "CPPFLAGS", "-DSQLITE_ENABLE_RTREE" if build.with? "rtree"
    ENV.append "CPPFLAGS", "-DSQLITE_ENABLE_FTS3 -DSQLITE_ENABLE_FTS3_PARENTHESIS" if build.with? "fts"
    ENV.append "CPPFLAGS", "-DSQLITE_ENABLE_COLUMN_METADATA"

    if build.with? "icu4c"
      icu4c = Formula["icu4c"]
      icu4cldflags = `#{icu4c.opt_bin}/icu-config --ldflags`.tr("\n", " ")
      icu4ccppflags = `#{icu4c.opt_bin}/icu-config --cppflags`.tr("\n", " ")
      ENV.append "LDFLAGS", icu4cldflags
      ENV.append "CPPFLAGS", icu4ccppflags
      ENV.append "CPPFLAGS", "-DSQLITE_ENABLE_ICU"
    end

    ENV.universal_binary if build.universal?

    system "./configure", "--prefix=#{prefix}", "--disable-dependency-tracking", "--enable-dynamic-extensions"
    system "make install"

    if build.with? "functions"
      buildpath.install resource("functions")
      system ENV.cc, "-fno-common",
                     "-dynamiclib",
                     "extension-functions.c",
                     "-o", "libsqlitefunctions.dylib",
                     *ENV.cflags.to_s.split
      lib.install "libsqlitefunctions.dylib"
    end
    doc.install resource("docs") if build.with? "docs"
  end

  def caveats
    if build.with? "functions" then <<-EOS.undent
      Usage instructions for applications calling the sqlite3 API functions:

        In your application, call sqlite3_enable_load_extension(db,1) to
        allow loading external libraries.  Then load the library libsqlitefunctions
        using sqlite3_load_extension; the third argument should be 0.
        See https://www.sqlite.org/cvstrac/wiki?p=LoadableExtensions.
        Select statements may now use these functions, as in
        SELECT cos(radians(inclination)) FROM satsum WHERE satnum = 25544;

      Usage instructions for the sqlite3 program:

        If the program is built so that loading extensions is permitted,
        the following will work:
         sqlite> SELECT load_extension('#{lib}/libsqlitefunctions.dylib');
         sqlite> select cos(radians(45));
         0.707106781186548
      EOS
    end
  end

  test do
    path = testpath/"school.sql"
    path.write <<-EOS.undent
      create table students (name text, age integer);
      insert into students (name, age) values ('Bob', 14);
      insert into students (name, age) values ('Sue', 12);
      insert into students (name, age) values ('Tim', 13);
      select name from students order by age asc;
    EOS

    names = `#{bin}/sqlite3 < #{path}`.strip.split("\n")
    assert_equal %w[Sue Tim Bob], names
    assert_equal 0, $?.exitstatus
  end
end