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

# Structure to hold recipe metadata
struct Recipe
  property tags : Array(String)
  property file_path : String
  property html_content : String

  # explicit initializer to ensure all properties are set
  def initialize(tags : Array(String), file_path : String, html_content : String)
    @tags = tags
    @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 only
      tags = [] of String
      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
  
          # Extract tags if present
          if match = front_matter.match(/tags:\s*\[(.*?)\]/)
            tags = match[1].split(",").map(&.strip)
          end         
        end
      end

      # Render the markdown content without the tags
      html_content = Markd.to_html(body_content)

      # 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

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

# Load recipes from the recipes directory
recipes = Recipe.load_from_folder("recipes")

# Route to display all recipes by category
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

# Route to display a specific recipe
get "/recipes/:category/:recipe" do |env|
  category = env.params.url["category"]
  recipe = env.params.url["recipe"]
  recipe_path = "recipes/#{category}/#{recipe}.md"

  if File.exists?(recipe_path)
    markdown_content = File.read(recipe_path)
    html_content = Markd.to_html(markdown_content)
    render "src/views/recipe.ecr", "src/views/layout.ecr"
  else
    env.response.status_code = 404
    "Recipe not found"
  end
end

# Route to display the search page
get "/search" do |env|
  render "src/views/search.ecr", "src/views/layout.ecr"
end

# Route to handle search results by tag
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

# Start Kemal
Kemal.run