module Clayoven::Toplevel

# File lib/clayoven/toplevel.rb, line 234
def self.dirty_pages(index_files, content_files, is_aggressive)
  # Adding a new index file is equivalent to re-rendering the entire site
  if @git.any_added?(index_files) || @git.template_changed? || is_aggressive
    dirty_pages_from_add(index_files, content_files)
  else
    dirty_pages_from_mod(index_files, content_files)
  end
end

# File lib/clayoven/toplevel.rb, line 145
def self.dirty_pages_from_add(index_files, content_files)
  progress =
    ProgressBar.create(
      title: "[#{"GIT".green} ]",
      total: index_files.count + content_files.count
    )

  # Strightforward
  dirty_index_pages =
    index_files.map do |filename|
      progress.increment
      IndexPage.new filename, @git
    end
  dirty_content_pages =
    content_files.map do |filename|
      progress.increment
      ContentPage.new filename, @git
    end
  [dirty_index_pages, dirty_content_pages]
end

# File lib/clayoven/toplevel.rb, line 206
def self.dirty_pages_from_mod(index_files, content_files)
  # Create a progressbar based on information from the git index
  modified_index_files, modified_content_files =
    modified_files_from_gitidx(index_files, content_files)
  progress =
    ProgressBar.create(
      title: "[#{"GIT".green} ]",
      total: modified_index_files.count + modified_content_files.count * 2
    )

  # Find out the dirty content_pages
  dirty_content_pages =
    modified_content_files.map do |filename|
      progress.increment
      ContentPage.new filename, @git
    end

  [
    find_dirty_index_pages(
      dirty_content_pages,
      modified_index_files,
      progress
    ),
    dirty_content_pages
  ]
end

# File lib/clayoven/toplevel.rb, line 180
def self.find_dirty_index_pages(
  dirty_content_pages,
  modified_index_files,
  progress
)
  # Avoid adding the
  # index page twice when there are two dirty content_pages under the same index
  dirty_from_content =
    dirty_content_pages
      .map { |dcp| "#{dcp.topic}.index.clay" }
      .uniq
      .map do |dif|
        progress.increment
        IndexPage.new dif, @git
      end
  dirty_from_content +
    modified_index_files.map do |filename|
      progress.increment
      IndexPage.new filename, @git
    end
end

# File lib/clayoven/toplevel.rb, line 268
def self.find_topics(index_files)
  all_topics =
    Util
      .lex_sort(index_files)
      .map { |file| file.split(".index.clay").first }
  topics =
    all_topics.reject do |entry|
      @config.hidden.any? { |hidden_entry| hidden_entry == entry }
    end
  [all_topics, topics]
end

# File lib/clayoven/toplevel.rb, line 311
def self.generate_html(genpages, topics)
  progress =
    ProgressBar.create(title: "[#{"CLAY".green}]", total: genpages.length)
  genpages.each do |page|
    page.render topics, @config.template
    progress.increment
  end
  Util.render_math genpages.map(&:target).join(" ")
end

# File lib/clayoven/toplevel.rb, line 346
def self.generate_site(genpages, topics, is_aggressive)
  generate_html genpages, topics if genpages.any?
  Util.minify_design if @git.design_changed? || is_aggressive
  generate_sitemap genpages if is_aggressive
end

# File lib/clayoven/toplevel.rb, line 329
def self.generate_sitemap(all_pages)
  puts "[#{"XML".green} ]: Generating sitemap"
  SitemapGenerator.verbose = false
  SitemapGenerator::Sitemap.include_root = false
  SitemapGenerator::Sitemap.compress = false
  SitemapGenerator::Sitemap.default_host = "https://#{@config.sitename}"
  SitemapGenerator::Sitemap.public_path = "."
  SitemapGenerator::Sitemap.create do
    add "/",
        lastmod: Clayoven::Toplevel.sitewide_lastmod(all_pages),
        priority: 1.0,
        changefreq: "always"
    all_pages.each { |p| add p.permalink, lastmod: p.lastmod }
  end
end

# File lib/clayoven/toplevel.rb, line 292
def self.index_content_files(all_files)
  index_files, content_files = separate_index_content_files all_files
  all_topics, topics = find_topics index_files

  # Look for stray files.  All content_files are nested within directories
  # We look in `all_topics`, because we still want hidden content_files to be
  # generated, just not shown.
  content_files
    .reject { |file| all_topics.include? file.split("/").first }
    .each do |stray|
      content_files -= [stray]
      warn "[#{"WARN".yellow} ]: #{stray} is a stray file or directory; ignored"
    end

  [index_files, content_files, topics]
end

# File lib/clayoven/toplevel.rb, line 353
def self.main(is_aggressive: false)
  # Only operate on git repositories
  toplevel = Git.toplevel
  if $? != 0 || toplevel.empty? ||
       (!File.directory? "#{toplevel}/.clayoven")
    abort "[#{"ERR".red} ]: Not a clayoven project (have you run `clayoven init`?)"
  end
  Dir.chdir(toplevel) do
    # Write out template files, if necessary
    @config = Clayoven::Config.new

    # Initialize git
    @git = Clayoven::Git.new @config.tzmap

    # Collect the list of files from a directory listing
    all_files = Util.ls_files

    # From all_files, get the list of index_files, content_files, and topics
    index_files, content_files, topics = index_content_files all_files

    # If the template changes, we're definitely in aggressive mode
    is_aggressive ||= @git.template_changed?

    # Get a list of pages to render, genpages
    genpages = pages_to_render index_files, content_files, is_aggressive

    # Generate the genpages
    generate_site genpages, topics, is_aggressive
  end
end

# File lib/clayoven/toplevel.rb, line 167
def self.modified_files_from_gitidx(index_files, content_files)
  # The case when index_files are added is handled in dirty_pages
  [
    index_files.select { |f| @git.modified? f },
    content_files.select { |f| @git.added_or_modified? f }
  ]
end

# File lib/clayoven/toplevel.rb, line 252
def self.pages_to_render(index_files, content_files, is_aggressive)
  dirty_index_pages, dirty_content_pages =
    dirty_pages index_files, content_files, is_aggressive

  # Reject hidden content_files
  dirty_index_pages.each do |dip|
    content_pages =
      unhidden_content_files(content_files)
        .select { |cf| cf.split("/", 2).first == dip.permalink }
        .map { |cf| ContentPage.new cf, @git }
    dip.fillindex content_pages, @config.stmap
  end
  dirty_index_pages + dirty_content_pages
end

# File lib/clayoven/toplevel.rb, line 281
def self.separate_index_content_files(all_files)
  # index_files are files ending in '.index.clay' and 'index.clay'
  # content_files are all other files; topics is the list of topics: we need it for the sidebar
  index_files =
    ["index.clay"] + all_files.select { |file| /\.index\.clay$/ =~ file }
  [index_files, all_files - index_files]
end

# File lib/clayoven/toplevel.rb, line 324
def self.sitewide_lastmod(all_pages)
  all_pages.select { |p| p.instance_of? IndexPage }.map(&:lastmod).max
end

# File lib/clayoven/toplevel.rb, line 244
def self.unhidden_content_files(content_files)
  content_files.reject do |cf|
    @config.hidden.any? { |hidden_entry| "#{hidden_entry}.clay" == cf }
  end
end