#==============================================================================
# Copyright 2020 William McCumstie
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#==============================================================================

require 'tty-color'

module OutputMode
  module TLDR
    module Index
      include BuilderDSL

      # Register a new column in the Index table
      # @overload register_callable(header:, verbose: true)
      #   @param header: The column's header field when displaying to humans
      #   @param verbose: Whether the column will be shown in the verbose output
      #   @param header_color: Override the default color for the header
      #   @param row_color: Override the default color for the row
      #   @yieldparam model The subject the column is describing, some sort of data model
      def register_callable(header:, verbose: nil, header_color: nil, row_color: nil, &b)
        super(modes: { verbose: verbose }, header: header,
              header_color: header_color, row_color: row_color, &b)
      end
      alias_method :register_column, :register_callable

      # Creates an new +output+ from the verbosity flag. This method only uses
      # +$stdout+ as part of it's output class discovery logic. It does not
      # print to the output directly
      #
      # The +ascii+ flag disables the unicode formatting in interactive shells.
      # Non interactive shells use ASCII by default.
      #
      # The +verbose+ flag toggles the simplified and verbose outputs in the
      # interactive output. Non-interactive outputs are always verbose
      #
      # If +$stdout+ is an interactive shell (aka a TTY), then it will display using
      # {OutputMode::Outputs::Tabulated}. This is intended for human consumption
      # and will obey the provided +verbose+ flag.
      #
      # If +$stdout+ is non-interactive, then it will display using
      # {OutputMode::Outputs::Delimited} using tab delimiters. This is intended
      # for consumption by machines. This output ignores the provided +verbose+
      # flag as it is always verbose.
      #
      # An interative/ non-interactive output can be forced by setting the
      # +interactive+ flag to +true+/+false+ respectively
      def build_output(verbose: false, ascii: false, interactive: nil, header_color: [:blue, :bold], row_color: :green)
        callables = if verbose || !$stdout.tty?
          # Filter out columns that are explicitly not verbose
          output_callables.select { |o| o.verbose?(true) }
        else
          # Filter out columns that are explicitly verbose
          output_callables.reject(&:verbose?)
        end

        if interactive || (interactive.nil? && $stdout.tty?)
          # Creates the human readable output
          opts = if ascii
                   { yes: 'yes', no: 'no', renderer: :ascii }
                 else
                   {
                     yes: '✓', no: '✕', renderer: :unicode, colorize: TTY::Color.color?,
                     header_color: callables.map { |c| c.config[:header_color] || header_color },
                     row_color: callables.map { |c| c.config[:row_color] || row_color }
                   }
                 end

          Outputs::Tabulated.new(*callables,
                                 header: callables.map { |c| c.config.fetch(:header, 'missing') },
                                 padding: [0,1],
                                 default: '(none)',
                                 **opts
                                 )
        else
          # Creates the machine readable output
          Outputs::Delimited.new(*callables, col_sep: "\t", yes: 'yes', no: 'no', default: '')
        end
      end
    end
  end
end