# frozen_string_literal: true

require 'rails_helper'

RSpec.describe UploadRecovery do
  fab!(:user) { Fabricate(:user) }

  let(:upload) do
    UploadCreator.new(
      file_from_fixtures("smallest.png"),
      "logo.png"
    ).create_for(user.id)
  end

  let(:upload2) do
    UploadCreator.new(
      file_from_fixtures("small.pdf", "pdf"),
      "some.pdf"
    ).create_for(user.id)
  end

  let(:post) do
    Fabricate(:post,
      raw: "![logo.png](#{upload.short_url})",
      user: user
    ).tap(&:link_post_uploads)
  end

  let(:upload_recovery) { UploadRecovery.new }

  before do
    SiteSetting.authorized_extensions = 'png|pdf'
    Jobs.run_immediately!
  end

  after do
    [upload, upload2].each do |u|
      next if u
      public_path = "#{Discourse.store.public_dir}#{u.url}"

      [
        public_path,
        public_path.sub("uploads", "uploads/tombstone")
      ].each { |path| File.delete(path) if File.exist?(path) }
    end
  end

  describe '#recover' do
    describe 'when given an invalid sha1' do
      it 'does nothing' do
        upload_recovery.expects(:recover_from_local).never

        post.update!(
          raw: "![logo.png](upload://#{'a' * 28}.png)"
        )

        upload_recovery.recover

        post.update!(
          raw: "<a href=#{"/uploads/test/original/3X/a/6%0A/#{upload.sha1}.png"}>test</a>"
        )

        upload_recovery.recover
      end
    end

    it 'accepts a custom ActiveRecord relation' do
      post.update!(updated_at: 2.days.ago)
      upload.destroy!

      upload_recovery.expects(:recover_from_local).never
      upload_recovery.recover(Post.where("updated_at >= ?", 1.day.ago))
    end

    describe 'for a missing attachment' do
      let(:post) do
        Fabricate(:post,
          raw: <<~SQL,
          <a class="attachment" href="#{upload2.url}">some.pdf</a>
          <a>blank</a>
          SQL
          user: user
        ).tap(&:link_post_uploads)
      end

      it 'recovers the attachment' do
        expect do
          upload2.destroy!
        end.to change { post.reload.uploads.count }.from(1).to(0)

        expect do
          upload_recovery.recover
        end.to change { post.reload.uploads.count }.from(0).to(1)

        expect(File.read(Discourse.store.path_for(post.uploads.first)))
          .to eq(File.read(file_from_fixtures("small.pdf", "pdf")))
      end
    end

    it 'recovers uploads and attachments' do
      stub_request(:get, "http://test.localhost#{upload.url}")
        .to_return(status: 200)

      expect do
        upload.destroy!
      end.to change { post.reload.uploads.count }.from(1).to(0)

      expect do
        upload_recovery.recover
      end.to change { post.reload.uploads.count }.from(0).to(1)

      expect(File.read(Discourse.store.path_for(post.uploads.first)))
        .to eq(File.read(file_from_fixtures("smallest.png")))
    end

    context 'S3 store' do
      before do
        setup_s3
        stub_s3_store
      end

      it 'recovers the upload' do
        expect do
          upload.destroy!
        end.to change { post.reload.uploads.count }.from(1).to(0)

        original_key = Discourse.store.get_path_for_upload(upload)
        tombstone_key = original_key.sub("original", "tombstone/original")

        tombstone_copy = stub
        tombstone_copy.expects(:key).returns(tombstone_key)

        Discourse.store.s3_helper.expects(:list).with("original").returns([])
        Discourse.store.s3_helper.expects(:list).with("#{FileStore::S3Store::TOMBSTONE_PREFIX}original").returns([tombstone_copy])
        Discourse.store.s3_helper.expects(:copy).with(tombstone_key, original_key, options: { acl: "public-read" })

        FileHelper.expects(:download).returns(file_from_fixtures("smallest.png"))
        stub_request(:get, upload.url).to_return(body: file_from_fixtures("smallest.png"))

        expect do
          upload_recovery.recover
        end.to change { post.reload.uploads.count }.from(0).to(1)
      end

      describe 'when the upload exists but its file is missing' do
        it 'recovers the file' do
          upload.verification_status = Upload.verification_statuses[:invalid_etag]
          upload.save!

          original_key = Discourse.store.get_path_for_upload(upload)
          tombstone_key = original_key.sub("original", "tombstone/original")

          tombstone_copy = stub
          tombstone_copy.expects(:key).returns(tombstone_key)

          Discourse.store.s3_helper.expects(:list).with("original").returns([])
          Discourse.store.s3_helper.expects(:list).with("#{FileStore::S3Store::TOMBSTONE_PREFIX}original").returns([tombstone_copy])
          Discourse.store.s3_helper.expects(:copy).with(tombstone_key, original_key, options: { acl: "public-read" })

          expect do
            upload_recovery.recover
          end.to_not change { [post.reload.uploads.count, Upload.count] }
        end

        it 'does not create a duplicate upload when secure uploads are enabled' do
          SiteSetting.secure_media = true
          upload.verification_status = Upload.verification_statuses[:invalid_etag]
          upload.save!

          original_key = Discourse.store.get_path_for_upload(upload)
          tombstone_key = original_key.sub("original", "tombstone/original")

          tombstone_copy = stub
          tombstone_copy.expects(:key).returns(tombstone_key)

          Discourse.store.s3_helper.expects(:list).with("original").returns([])
          Discourse.store.s3_helper.expects(:list).with("#{FileStore::S3Store::TOMBSTONE_PREFIX}original").returns([tombstone_copy])
          Discourse.store.s3_helper.expects(:copy).with(tombstone_key, original_key, options: { acl: "public-read" })

          expect do
            upload_recovery.recover
          end.to_not change { [post.reload.uploads.count, Upload.count] }
        end
      end
    end

    describe 'image tag' do
      let(:post) do
        Fabricate(:post,
          raw: <<~SQL,
          <img src='#{upload.url}'>
          SQL
          user: user
        ).tap(&:link_post_uploads)
      end

      it 'recovers the upload' do
        stub_request(:get, "http://test.localhost#{upload.url}")
          .to_return(status: 200)

        expect do
          upload.destroy!
        end.to change { post.reload.uploads.count }.from(1).to(0)

        expect do
          upload_recovery.recover
        end.to change { post.reload.uploads.count }.from(0).to(1)

        expect(File.read(Discourse.store.path_for(post.uploads.first)))
          .to eq(File.read(file_from_fixtures("smallest.png")))
      end
    end

    describe 'image markdown' do
      let(:post) do
        Fabricate(:post,
          raw: <<~SQL,
          ![image](#{upload.url})
          SQL
          user: user
        ).tap(&:link_post_uploads)
      end

      it 'recovers the upload' do
        stub_request(:get, "http://test.localhost#{upload.url}")
          .to_return(status: 200)

        expect do
          upload.destroy!
        end.to change { post.reload.uploads.count }.from(1).to(0)

        expect do
          upload_recovery.recover
        end.to change { post.reload.uploads.count }.from(0).to(1)

        expect(File.read(Discourse.store.path_for(post.uploads.first)))
          .to eq(File.read(file_from_fixtures("smallest.png")))
      end
    end

    describe 'bbcode' do
      let(:post) do
        Fabricate(:post,
          raw: <<~SQL,
          [img]#{upload.url}[/img]
          SQL
          user: user
        ).tap(&:link_post_uploads)
      end

      it 'recovers the upload' do
        stub_request(:get, "http://test.localhost#{upload.url}")
          .to_return(status: 200)

        expect do
          upload.destroy!
        end.to change { post.reload.uploads.count }.from(1).to(0)

        expect do
          upload_recovery.recover
        end.to change { post.reload.uploads.count }.from(0).to(1)

        expect(File.read(Discourse.store.path_for(post.uploads.first)))
          .to eq(File.read(file_from_fixtures("smallest.png")))
      end
    end
  end
end