require "kemal"
require "json"
require "markd"

struct Recipe
  property tags : Array(String)
  property authors : Array({String, String}) # (name, link)
  property file_path : String
  property html_content : String

  def initialize(tags : Array(String), authors : Array({String, String}), file_path : String, html_content : String)
    @tags = tags
    @authors = authors
    @file_path = file_path
    @html_content = html_content
  end

  def self.load_from_folder(folder_path : String)
    recipes = [] of Recipe
    Dir.glob("#{folder_path}/*/*.md") do |file_path|
      content = File.read(file_path)

      # Extract front matter for tags and authors
      tags = [] of String
      authors = [] of {String, String} # Array of {name, link}
      body_content = content

      if content.starts_with?("---")
        front_matter_end = content.index(/---\s*\n/, 4) # find the second "---" line
        if front_matter_end
          front_matter = content[4...front_matter_end].strip
          body_content = content[(front_matter_end + 4)..-1].strip

          # Parse tags
          if match = front_matter.match(/tags:\s*\[(.*?)\]/)
            tags = match[1].split(",").map(&.strip)
          end

          # Parse authors
          if match = front_matter.match(/authors:\s*\[(.*?)\]/)
            # Authors list in "name|link" format, e.g., authors: ["Alice|https://github.com/alice", "Bob|https://bob.com"]
            authors = match[1].split(",").map do |author|
              parts = author.strip.split("|")
              {parts[0].strip, parts[1].strip}
            end
          end
        end
      end

      # Extract title as the first line with a single '#'
      title = body_content.lines.find { |line| line.match(/^#\s+/) }?.strip || "Untitled"
      title_html = "<h1>#{title.sub(/^#\s+/, "")}</h1>"

      # Render the markdown content without the tags
      html_content = title_html + Markd::Document.new(body_content).to_html

      # Append tags to the end in a readable format
      if !tags.empty?
        html_content += "<div class=\"tags mt-6 pt-2 border-t border-gray-300 dark:border-gray-600\">"
        html_content += "<h3 class=\"text-lg font-semibold mb-2\">Tags:</h3>"
        html_content += "<ul class=\"flex flex-wrap gap-2\">"
        tags.each do |tag|
          html_content += "<li class=\"px-2 py-1 bg-gray-200 rounded dark:bg-gray-700 text-sm\">#{tag}</li>"
        end
        html_content += "</ul></div>"
      end

      # Append authors to the end in alphabetical order
      if !authors.empty?
        sorted_authors = authors.sort_by { |author| author[0].downcase }
        html_content += "<div class=\"authors mt-6 pt-2 border-t border-gray-300 dark:border-gray-600\">"
        html_content += "<h3 class=\"text-lg font-semibold mb-2\">Authors:</h3>"
        html_content += "<p class=\"text-sm\">"
        html_content += sorted_authors.map { |author| "<a href=\"#{author[1]}\" class=\"text-blue-500 dark:text-blue-400 font-semibold\">#{author[0]}</a>" }.join(", ")
        html_content += "</p></div>"
      end

      recipes << Recipe.new(tags, authors, file_path, html_content)
    end
    recipes
  end
end

recipes = Recipe.load_from_folder("recipes")

get "/" do
  categorized_recipes = recipes.group_by { |r| File.basename(File.dirname(r.file_path)).to_s }
  render "src/views/index.ecr", "src/views/layout.ecr"
end

get "/recipes/:category/:recipe" do |env|
  category = env.params.url["category"]
  recipe_name = env.params.url["recipe"]

  recipe = recipes.find do |r| 
    File.basename(File.dirname(r.file_path)) == category && File.basename(r.file_path, ".md") == recipe_name
  end

  if recipe
    html_content = recipe.html_content
    render "src/views/recipe.ecr", "src/views/layout.ecr"
  else
    env.response.status_code = 404
    "Recipe not found"
  end
end

get "/search" do |env|
  render "src/views/search.ecr", "src/views/layout.ecr"
end

get "/search/results" do |env|
  query = env.params.query["tag"] || ""
  matched_recipes = recipes.select { |recipe| recipe.tags.includes?(query.downcase) }

  render "src/views/search_results.ecr", "src/views/layout.ecr"
end

Kemal.run