require 'json'

module Fastlane
  module PageGenerator
    PLACEHOLDER_URL = "https://s3.eu-central-1.amazonaws.com/fota.polidea.com/mails/images/icon-placeholder.jpg"

    def self.mail(config)
      UI.message("Generating e-mail...")
      eth = Fastlane::ErbTemplateHelper
      html_template = eth.load_from_path(
        File.expand_path("templates/mail.erb", Polidea.root)
      )
      eth.render(html_template, {
        author: config[:author],
        last_commit: config[:last_commit],
        is_android: config[:is_android],
        app_icon: mail_app_icon_or_placholder(config[:app_icon]),
        app_name: config[:app_name],
        app_version: config[:app_version],
        build_number: config[:build_number],
        installation_link: config[:installation_link],
        release_notes: parse_release_notes(config[:release_notes]),
        platform: config[:platform],
        release_date: config[:release_date],
        binary_size: config[:binary_size],
        qr_code: "cid:#{config[:qr_code]}"
      })
    end

    def self.installation_page(config)
      UI.message("Generating public installation page...")
      eth = Fastlane::ErbTemplateHelper
      html_template = eth.load_from_path(
        File.expand_path("templates/install.erb", Polidea.root)
      )
      eth.render(html_template, {
        url: config[:url],
        app_version: config[:app_version],
        build_number: config[:build_number],
        app_name: config[:app_name],
        app_icon: app_icon_or_placholder(config[:app_icon]),
        release_notes: parse_release_notes(config[:release_notes])
      })
    end

    def self.parse_release_notes(release_notes)
      renderer = Redcarpet::Render::HTML.new({
        filter_html: true,
        no_styles: true
      })
      markdown = Redcarpet::Markdown.new(
        renderer,
        fenced_code_blocks: true,
        autolink: false,
        tables: false
      )
      markdown.render(release_notes || "No release notes.")
    end
    private_class_method :parse_release_notes

    def self.mail_app_icon_or_placholder(app_icon)
      if app_icon.nil?
        PLACEHOLDER_URL
      else
        "cid:#{app_icon}"
      end
    end
    private_class_method :mail_app_icon_or_placholder

    def self.app_icon_or_placholder(app_icon)
      if app_icon.nil?
        PLACEHOLDER_URL
      else
        app_icon
      end
    end
    private_class_method :app_icon_or_placholder
  end
end