require 'rack'
require 'maglove/middleware/live_reload'

module MagLove
  class Server
    attr_reader :app, :options

    def self.start(port, theme, templates)
      app = Rack::Builder.new do
        use MagLove::Middleware::LiveReload, mount: "/maglove", theme: theme, templates: templates
        use Rack::Static, urls: ["/fonts", "/themes"], root: "dist"
        use Rack::Static, urls: ["/images"], root: "dist/themes/#{theme}"
        run MagLove::Server.new(theme: theme, templates: templates, port: port)
      end
      Rack::Server.start(app: app, Port: port, server: :puma)
    end

    def initialize(options)
      @options = options
      Maglove::Engine.configure do |config|
        config.asset_uri = "."
        config.block_path = "src/themes/#{options[:theme]}/blocks"
      end
    end

    def call(env)
      template = env["PATH_INFO"].sub("/", "")
      if env["PATH_INFO"] == "/maglove.js"
        [200, { 'Content-Type' => 'text/javascript' }, [Maglove.assets_dir.file("maglove.js").read]]
      elsif env["PATH_INFO"] == "/maglove-widgets.js"
        widgets_file = Workspace.dir(Dir.pwd).file("node_modules/maglove-widgets/dist/widgets.js")
        if widgets_file.exists?
          [200, { 'Content-Type' => 'text/javascript' }, [widgets_file.read]]
        else
          [200, { 'Content-Type' => 'text/javascript' }, ["export default { ready: function() { alert('Module \\\"maglove-widgets\\\" not installed. Run \\\"npm install maglove-widgets\\\" to install.'); return this; }, then: function() {} }"]]
        end
      elsif env["PATH_INFO"] == "/maglove.css"
        [200, { 'Content-Type' => 'text/css' }, [Maglove.assets_dir.file("maglove.css").read]]
      elsif @options[:templates].include?(template)
        [200, { 'Content-Type' => 'text/html' }, [process(template)]]
      else
        [200, { 'Content-Type' => 'text/html' }, [Maglove::Engine.render(Maglove.assets_dir.file("index.haml").read, @options)]]
      end
    end

    def process(template)
      css_contents = Workspace::Dir.new(Dir.pwd, "dist/themes/#{options[:theme]}").file("theme.css").read
      js_contents = Workspace::Dir.new(Dir.pwd, "dist/themes/#{options[:theme]}").file("theme.js").read
      template_asset = MagLove::Asset::Theme.new("templates/#{template}.haml", { base: false })
      Maglove::Engine.render(Maglove.assets_dir.file("maglove.haml").read, {
        theme: @options[:theme],
        contents: template_asset.contents,
        css_contents: css_contents,
        js_contents: js_contents,
        template: template,
        port: @options[:port] || 3000
      })
    end

    def setup(theme)
      @widget_stamps = {}
      Dir["widgets/*.rb"].each { |file| @widget_stamps[file] = File.mtime(file).to_i }
      @options[:templates].each do |template|
        mount("/#{template}") do |req, res|
          Dir["widgets/*.rb"].each do |file|
            stamp = File.mtime(file).to_i
            next unless @widget_stamps[file] and @widget_stamps[file] < stamp
            @widget_stamps[file] = stamp
            debug("▸ reloading widget: #{file}")
            load(file)
          end
        end
      end
    end
  end
end