require 'test_helper'

class PostReplacementTest < ActiveSupport::TestCase
  def setup
    super

    mock_iqdb_service!
    Delayed::Worker.delay_jobs = true # don't delete the old images right away

    @system = FactoryBot.create(:user, created_at: 2.weeks.ago)
    User.stubs(:system).returns(@system)

    @uploader = FactoryBot.create(:user, created_at: 2.weeks.ago, can_upload_free: true)
    @replacer = FactoryBot.create(:user, created_at: 2.weeks.ago, can_approve_posts: true)
    CurrentUser.user = @replacer
    CurrentUser.ip_addr = "127.0.0.1"
  end

  def teardown
    super

    CurrentUser.user = nil
    CurrentUser.ip_addr = nil
    Delayed::Worker.delay_jobs = false
  end

  context "Replacing" do
    setup do
      CurrentUser.scoped(@uploader, "127.0.0.2") do
        upload = FactoryBot.create(:jpg_upload, as_pending: "0", tag_string: "lowres tag1")
        upload.process!
        @post = upload.post
      end
    end

    context "a post from a generic source" do
      setup do
        @post.update(source: "https://www.google.com/images/branding/googlelogo/1x/googlelogo_color_272x92dp.png")
        @post.replace!(replacement_url: "https://www.google.com/intl/en_ALL/images/logo.gif", tags: "-tag1 tag2")
        @replacement = @post.replacements.last
        @upload = Upload.last
      end

      context "that is then undone" do
        setup do
          Timecop.travel(Time.now + PostReplacement::DELETION_GRACE_PERIOD + 1.day) do
            Delayed::Worker.new.work_off
          end

          @replacement = @post.replacements.first
          @replacement.undo!
          @post.reload
        end

        should "update the attributes" do
          assert_equal("lowres tag2", @post.tag_string)
          assert_equal(272, @post.image_width)
          assert_equal(92, @post.image_height)
          assert_equal(5969, @post.file_size)
          assert_equal("png", @post.file_ext)
          assert_equal("8f9327db2597fa57d2f42b4a6c5a9855", @post.md5)
          assert_equal("8f9327db2597fa57d2f42b4a6c5a9855", Digest::MD5.file(@post.file).hexdigest)
          assert_equal("https://www.google.com/images/branding/googlelogo/1x/googlelogo_color_272x92dp.png", @post.source)
        end
      end

      should "create a post replacement record" do
        assert_equal(@post.id, PostReplacement.last.post_id)
      end

      should "record the old file metadata" do
        assert_equal(500, @replacement.image_width_was)
        assert_equal(335, @replacement.image_height_was)
        assert_equal(28086, @replacement.file_size_was)
        assert_equal("jpg", @replacement.file_ext_was)
        assert_equal("ecef68c44edb8a0d6a3070b5f8e8ee76", @replacement.md5_was)
      end

      should "record the new file metadata" do
        assert_equal(276, @replacement.image_width)
        assert_equal(110, @replacement.image_height)
        assert_equal(8558, @replacement.file_size)
        assert_equal("gif", @replacement.file_ext)
        assert_equal("e80d1c59a673f560785784fb1ac10959", @replacement.md5)
      end

      should "correctly update the attributes" do
        assert_equal(@post.id, @upload.post.id)
        assert_equal("completed", @upload.status)

        assert_equal(276, @post.image_width)
        assert_equal(110, @post.image_height)
        assert_equal(8558, @post.file_size)
        assert_equal("gif", @post.file_ext)
        assert_equal("e80d1c59a673f560785784fb1ac10959", @post.md5)
        assert_equal("e80d1c59a673f560785784fb1ac10959", Digest::MD5.file(@post.file).hexdigest)
        assert_equal("https://www.google.com/intl/en_ALL/images/logo.gif", @post.source)
      end

      should "not change the post status or uploader" do
        assert_equal("127.0.0.2", @post.uploader_ip_addr.to_s)
        assert_equal(@uploader.id, @post.uploader_id)
        assert_equal(false, @post.is_pending)
      end

      should "leave a system comment" do
        comment = @post.comments.last

        assert_not_nil(comment)
        assert_equal(User.system.id, comment.creator_id)
        assert_match(/replaced this post/, comment.body)
      end

      should "not send an @mention to the replacer" do
        assert_equal(0, @replacer.dmails.size)
      end
    end

    context "a post with notes" do
      setup do
        @post.update(image_width: 160, image_height: 164)
        CurrentUser.scoped(@uploader, "127.0.0.1") do
          @note = @post.notes.create(x: 80, y: 82, width: 80, height: 82, body: "test")
        end
      end

      should "rescale the notes" do
        assert_equal([80, 82, 80, 82], [@note.x, @note.y, @note.width, @note.height])

        assert_difference("@replacer.note_versions.count") do
          # replacement image is 80x82, so we're downscaling by 50% (160x164 -> 80x82).
          @post.replace!(replacement_url: "https://www.pixiv.net/member_illust.php?mode=medium&illust_id=62247350")
          @note.reload
        end

        assert_equal([40, 41, 40, 41], [@note.x, @note.y, @note.width, @note.height])
      end
    end

    context "a post with a pixiv html source" do
      should "replace with the full size image" do
        @post.replace!(replacement_url: "https://www.pixiv.net/member_illust.php?mode=medium&illust_id=62247350")

        assert_equal(80, @post.image_width)
        assert_equal(82, @post.image_height)
        assert_equal(16275, @post.file_size)
        assert_equal("png", @post.file_ext)
        assert_equal("4ceadc314938bc27f3574053a3e1459a", @post.md5)
        assert_equal("4ceadc314938bc27f3574053a3e1459a", Digest::MD5.file(@post.file).hexdigest)
        assert_equal("https://i.pximg.net/img-original/img/2017/04/04/08/54/15/62247350_p0.png", @post.source)
        assert_equal("https://i.pximg.net/img-original/img/2017/04/04/08/54/15/62247350_p0.png", @post.replacements.last.replacement_url)
      end

      should "delete the old files after thirty days" do
        old_file_path, old_preview_file_path = @post.file(:original).path, @post.file(:preview).path
        @post.replace!(replacement_url: "https://www.pixiv.net/member_illust.php?mode=medium&illust_id=62247350")

        assert(File.exists?(old_file_path))
        assert(File.exists?(old_preview_file_path))

        Timecop.travel(Time.now + PostReplacement::DELETION_GRACE_PERIOD + 1.day) do
          Delayed::Worker.new.work_off
        end

        assert_not(File.exists?(old_file_path))
        assert_not(File.exists?(old_preview_file_path))
      end
    end

    context "a post that is replaced by a ugoira" do
      should "save the frame data" do
        skip "ffmpeg not installed" unless check_ffmpeg
        @post.replace!(replacement_url: "http://www.pixiv.net/member_illust.php?mode=medium&illust_id=62247364")
        @post.reload

        assert_equal(80, @post.image_width)
        assert_equal(82, @post.image_height)
        assert_equal(2804, @post.file_size)
        assert_equal("zip", @post.file_ext)
        assert_equal("cad1da177ef309bf40a117c17b8eecf5", @post.md5)
        assert_equal("cad1da177ef309bf40a117c17b8eecf5", Digest::MD5.file(@post.file).hexdigest)

        assert_equal("https://i.pximg.net/img-zip-ugoira/img/2017/04/04/08/57/38/62247364_ugoira1920x1080.zip", @post.source)
        assert_equal([{"file"=>"000000.jpg", "delay"=>125}, {"file"=>"000001.jpg", "delay"=>125}], @post.pixiv_ugoira_frame_data.data)
      end
    end

    context "a post that is replaced to another file then replaced back to the original file" do
      should "not delete the original files" do
        skip "ffmpeg is not installed" unless check_ffmpeg
        
        @post.replace!(replacement_url: "https://www.pixiv.net/member_illust.php?mode=medium&illust_id=62247350")
        @post.replace!(replacement_url: "https://www.pixiv.net/member_illust.php?mode=medium&illust_id=62247364")
        @post.replace!(replacement_url: "https://www.pixiv.net/member_illust.php?mode=medium&illust_id=62247350")

        assert_nothing_raised { @post.file(:original) }
        assert_nothing_raised { @post.file(:preview) }

        Timecop.travel(Time.now + PostReplacement::DELETION_GRACE_PERIOD + 1.day) do
          Delayed::Worker.new.work_off
        end

        assert_nothing_raised { @post.file(:original) }
        assert_nothing_raised { @post.file(:preview) }
      end
    end

    context "two posts that have had their files swapped" do
      should "not delete the still active files" do
        skip "ffmpeg is not installed" unless check_ffmpeg

        @post1 = FactoryBot.create(:post)
        @post2 = FactoryBot.create(:post)

        # swap the images between @post1 and @post2.
        @post1.replace!(replacement_url: "https://www.pixiv.net/member_illust.php?mode=medium&illust_id=62247350")
        @post2.replace!(replacement_url: "https://www.pixiv.net/member_illust.php?mode=medium&illust_id=62247364")
        @post2.replace!(replacement_url: "https://www.google.com/intl/en_ALL/images/logo.gif")
        @post1.replace!(replacement_url: "https://www.pixiv.net/member_illust.php?mode=medium&illust_id=62247364")
        @post2.replace!(replacement_url: "https://www.pixiv.net/member_illust.php?mode=medium&illust_id=62247350")

        Timecop.travel(Time.now + PostReplacement::DELETION_GRACE_PERIOD + 1.day) do
          Delayed::Worker.new.work_off
        end

        assert_nothing_raised { @post1.file(:original) }
        assert_nothing_raised { @post2.file(:original) }
      end
    end

    context "a post with an uploaded file" do
      should "work" do
        upload_file("test/files/test.png") do |file|
          @post.replace!(replacement_file: file, replacement_url: "")
          assert_equal(@post.md5, Digest::MD5.file(file.tempfile).hexdigest)
          assert_equal("file://test.png", @post.replacements.last.replacement_url)
        end
      end
    end

    context "a post when given a final_source" do
      should "change the source to the final_source" do
        replacement_url = "http://data.tumblr.com/afed9f5b3c33c39dc8c967e262955de2/tumblr_orwwptNBCE1wsfqepo1_raw.png"
        final_source = "https://noizave.tumblr.com/post/162094447052"
        @post.replace!(replacement_url: replacement_url, final_source: final_source)

        assert_equal(final_source, @post.source)
      end
    end

    context "a post when replaced with a HTML source" do
      should "record the image URL as the replacement URL, not the HTML source" do
        skip "Twitter key not set" unless Danbooru.config.twitter_api_key
        replacement_url = "https://twitter.com/nounproject/status/540944400767922176"
        image_url = "https://pbs.twimg.com/media/B4HSEP5CUAA4xyu.png:orig"
        @post.replace!(replacement_url: replacement_url)

        assert_equal(image_url, @post.replacements.last.replacement_url)
      end
    end

    context "a post with the same file" do
      should "not raise a duplicate error" do
        upload_file("test/files/test.jpg") do |file|
          assert_nothing_raised do
            @post.replace!(replacement_file: file, replacement_url: "")
          end
        end
      end

      should "not queue a deletion or log a comment" do
        upload_file("test/files/test.jpg") do |file|
          assert_no_difference(["@post.comments.count"]) do
            @post.replace!(replacement_file: file, replacement_url: "")
          end
        end
      end
    end
  end
end