require "spec_helper"
require "json"
require "tmpdir"

RSpec.describe Pressa::Posts::JSONFeedWriter do
  let(:site) do
    Pressa::Site.new(
      author: "Sami Samhuri",
      email: "sami@samhuri.net",
      title: "samhuri.net",
      description: "blog",
      url: "https://samhuri.net",
      image_url: "https://samhuri.net/images/me.jpg"
    )
  end

  let(:posts_by_year) { double("posts_by_year", recent_posts: [post]) }
  let(:writer) { described_class.new(site:, posts_by_year:) }

  context "for link posts" do
    let(:post) do
      Pressa::Posts::Post.new(
        slug: "github-flow-like-a-pro",
        title: "GitHub Flow Like a Pro",
        author: "Sami Samhuri",
        date: DateTime.parse("2015-05-28T07:42:27-07:00"),
        formatted_date: "28th May, 2015",
        link: "http://haacked.com/archive/2014/07/28/github-flow-aliases/",
        body: "<p>hello</p>",
        excerpt: "hello...",
        path: "/posts/2015/05/github-flow-like-a-pro"
      )
    end

    it "uses permalink as url and keeps external_url for destination links" do
      Dir.mktmpdir do |dir|
        writer.write_feed(target_path: dir, limit: 30)
        feed = JSON.parse(File.read(File.join(dir, "feed.json")))
        item = feed.fetch("items").first

        expect(item.fetch("id")).to eq("https://samhuri.net/posts/2015/05/github-flow-like-a-pro")
        expect(item.fetch("url")).to eq("https://samhuri.net/posts/2015/05/github-flow-like-a-pro")
        expect(item.fetch("external_url")).to eq("http://haacked.com/archive/2014/07/28/github-flow-aliases/")
      end
    end
  end

  context "for regular posts" do
    let(:post) do
      Pressa::Posts::Post.new(
        slug: "swift-optional-or",
        title: "Swift Optional OR",
        author: "Sami Samhuri",
        date: DateTime.parse("2017-10-01T10:00:00-07:00"),
        formatted_date: "1st October, 2017",
        body: "<p>hello</p>",
        excerpt: "hello...",
        path: "/posts/2017/10/swift-optional-or"
      )
    end

    it "omits external_url" do
      Dir.mktmpdir do |dir|
        writer.write_feed(target_path: dir, limit: 30)
        feed = JSON.parse(File.read(File.join(dir, "feed.json")))
        item = feed.fetch("items").first

        expect(item.fetch("url")).to eq("https://samhuri.net/posts/2017/10/swift-optional-or")
        expect(item).not_to have_key("external_url")
      end
    end

    it "expands root-relative links in content_html to absolute URLs" do
      post_with_assets = Pressa::Posts::Post.new(
        slug: "swift-optional-or",
        title: "Swift Optional OR",
        author: "Sami Samhuri",
        date: DateTime.parse("2017-10-01T10:00:00-07:00"),
        formatted_date: "1st October, 2017",
        body: '<p><a href="/posts/2010/01/basics-of-the-mach-o-file-format">read</a></p>' \
              '<p><img src="/images/me.jpg" alt="me"></p>' \
              '<p><a href="//cdn.example.net/app.js">cdn</a></p>',
        excerpt: "hello...",
        path: "/posts/2017/10/swift-optional-or"
      )
      allow(posts_by_year).to receive(:recent_posts).and_return([post_with_assets])

      Dir.mktmpdir do |dir|
        writer.write_feed(target_path: dir, limit: 30)
        feed = JSON.parse(File.read(File.join(dir, "feed.json")))
        item = feed.fetch("items").first
        content_html = item.fetch("content_html")

        expect(content_html).to include('href="https://samhuri.net/posts/2010/01/basics-of-the-mach-o-file-format"')
        expect(content_html).to include('src="https://samhuri.net/images/me.jpg"')
        expect(content_html).to include('href="//cdn.example.net/app.js"')
      end
    end
  end
end