module Cani

# File lib/cani.rb, line 19
def self.api
  @api ||= Api.new
end

# File lib/cani.rb, line 109
def self.completion_paths
  Completions.paths
end

# File lib/cani.rb, line 23
def self.config
  @settings ||= Config.new
end

# File lib/cani.rb, line 127
def self.edit
  system ENV.fetch('EDITOR', 'vim'), config.file
end

# File lib/cani.rb, line 27
def self.exec!(command, *args_and_options)
  return config if command&.start_with? '-'

  args    = args_and_options.reject { |arg| arg.start_with? '-' }
  command = :help unless command && respond_to?(command)
  command = command.to_s.downcase.to_sym

  case command
  when :edit
    edit
  when :use
    use args[0]
  when :show
    show args[0], args[1]
  when :update, :purge, :help, :version,
       :install_completions, :completion_paths
    send command
  else
    help
  end
end

# File lib/cani.rb, line 49
def self.help
  String.disable_colorization true unless STDOUT.tty?
  puts "Cani ".light_yellow + VERSION.to_s + ' <https://github.com/SidOfc/cani>'.light_black
  puts ''
  puts 'This command provides a TUI interface to access caniuse.com data.'.light_black
  puts 'It allows one to search by browser / version using the \'show\' command'.light_black
  puts 'and by feature using the \'use\' command. Pressing <enter> on a feature'.light_black
  puts 'in the \'use\' overview or calling \'use some-feature\' will display a'.light_black
  puts 'table as seen on caniuse.com using curses.'.light_black
  puts ''
  puts 'cani is dependent on fzf (https://github.com/junegunn/fzf)'.light_black
  puts 'for the interactive TUI to work. Without fzf,'.light_black
  puts 'commands can still be piped to get the regular (colorless) output.'.light_black
  puts ''
  puts 'Cani requires at least 20 lines and 40 cols to work properly,'.light_black
  puts 'this is not a hard limit but below this width long lines could wrap'.light_black
  puts 'a lot and significantly reduce visible information.'.light_black
  puts ''
  puts 'Usage:'.red
  puts '   cani'.yellow + ' [COMMAND [ARGUMENTS] [OPTIONS]]'
  puts ''
  puts 'Commands:'.red
  puts '   use '.blue + ' [FEATURE]             ' + 'show browser support for FEATURE'.light_black
  puts '   show'.blue + ' [BROWSER [VERSION]]   ' + 'show information about specific BROWSER and VERSION'.light_black
  puts '   '
  puts '   install_completions        '.blue      + 'installs completions for bash, zsh and fish'.light_black
  puts '   completion_paths           '.blue      + 'prints completion paths that must be sourced in your shell configuration files'.light_black
  puts '   update                     '.blue      + 'force update api data and completions'.light_black
  puts '   edit                       '.blue      + 'edit configuration in $EDITOR'.light_black
  puts '   purge                      '.blue      + 'remove all completion, configuration and data'.light_black
  puts '                              '.blue      + 'stored by this cani'.light_black
  puts '   '
  puts '   help                       '.blue      + 'show this help'.light_black
  puts '   version                    '.blue      + 'print the version number'.light_black
  puts ''
  puts 'Options:'.red
  puts '   --[no-]modify              '.white + 'permanently enable/disable automatic adding/removing'.light_black
  puts '                              '.white + 'of source lines in shell configuration files'.light_black
  puts ''
  puts 'Examples:'.red
  puts '   cani'.yellow + ' use'.blue
  puts '   cani'.yellow + ' use'.blue  + ' \'box-shadow\''
  puts '   cani'.yellow + ' show'.blue + ' ie'
  puts '   cani'.yellow + ' show'.blue + ' ie 11'
  puts '   cani'.yellow + ' show'.blue + ' ie' + ' |'.light_black + ' cat'.yellow
  puts ''
  puts 'Statuses:'.red
  puts '   [ls]'.green   + '   WHATWG Living Standard'.light_black
  puts '   [rc]'.green   + '   W3C Recommendation'.light_black
  puts '   [pr]'.green   + '   W3C Proposed Recommendation'.light_black
  puts '   [cr]'.green   + '   W3C Candidate Recommendation'.light_black
  puts '   [wd]'.green   + '   W3C Working Draft'.light_black
  puts '   [un]'.yellow  + '   Unofficial, Editor\'s draft or W3C "Note"'.light_black
  puts '   [ot]'.magenta + '   Non-W3C, but reputable'.light_black
end

# File lib/cani.rb, line 113
def self.install_completions
  Completions.install! || exit(1)
end

# File lib/cani.rb, line 117
def self.purge
  Completions.remove!
  api.remove!
  config.remove!
end

# File lib/cani.rb, line 152
def self.show(brws = nil, version = nil)
  browser           = api.find_browser brws
  @show_min_depth ||= 0 + (browser ? 1 : 0) + (version ? 1 : 0)

  if browser
    if version
      chosen = Fzf.pick Fzf.browser_feature_rows(browser, version),
                        header: "show:#{browser.title.downcase}:#{version}]   [#{Api::Feature.support_legend}",
                        colors: [:green, :light_black, :light_white]

      if chosen.any? && (feature = api.find_feature(chosen[2]))
        Api::Feature::Viewer.new(feature).render
        show browser.title, version
      else
        show browser.title
      end
    else
      exit if config.nav_type?('forward') && @show_min_depth > 1

      if (version = Fzf.pick(Fzf.browser_usage_rows(browser),
                             header: [:show, browser.title],
                             colors: %i[white light_black]).first)
        show browser.title, version
      else
        show
      end
    end
  else
    exit if config.nav_type?('forward') && @show_min_depth > 0

    browser = api.find_browser Fzf.pick(Fzf.browser_rows,
                                        header: [:show],
                                        colors: %i[white light_black]).first

    show browser.title unless browser.nil?
  end
end

# File lib/cani.rb, line 123
def self.update
  api.update! && install_completions unless api.updated?
end

# File lib/cani.rb, line 131
def self.use(feature = nil)
  @use_min_depth ||= feature ? 1 : 0
  can_go_back      = !(config.nav_type?('forward') && @use_min_depth > 0)
  matches          = api.find_features feature

  return use if can_go_back && matches.empty?
  return Api::Feature::Viewer.new(matches.first).render if matches.count == 1

  chosen = Fzf.pick Fzf.feature_rows, query: feature,
                        header: 'use]   [' + Api::Feature.support_legend,
                        colors: %i[green light_black light_white light_black]

  # chosen[2] is the title column of a row returned by Fzf.feature_rows
  if chosen && chosen.any? && (feature = api.find_feature(chosen[2]))
    Api::Feature::Viewer.new(feature).render
    use
  else
    exit 0
  end
end

# File lib/cani.rb, line 105
def self.version
  puts VERSION
end