#!/usr/bin/env ruby

$:.unshift File.dirname(__FILE__)
$:.unshift File.join(File.dirname(__FILE__), "../lib")

require "optparse"
require "ostruct"
require "yaml"
require "yaml-cv"
require "filewatcher"

class Options

    def self.initialize

        @@options = OpenStruct.new
        @@options.file_name = ""
        @@options.watch = false
        @@options.html_file = ""
        @@options.pdf_file = ""
    end

    def self.parser

        OptionParser.new do |opts|

            opts.banner = "Usage: yaml-cv <path to yml file> [options]"

            opts.on("-w", "--watch", "Watch the input file for changes and automatically regenerate the CV.") do |watch|

                @@options.watch = watch
            end

            opts.on("--html [HTML_FILE]", "The output path to the generated HTML file.") do |html|

                @@options.html_file = html
            end

            opts.on("--pdf [PDF_FILE]", "The output path to the generated PDF file.") do |pdf|

                @@options.pdf_file = pdf
            end

            opts.on_tail("-h", "--help", "Print this message and exit.") do

                puts opts
                exit
            end

        end

    end

    def self.parse(args)

        initialize

        parser.parse!(args)

        @@options.file_name = ARGV.pop

        raise "Please specify an input yml file." unless @@options.file_name
    end

    def self.options

        @@options
    end

end

def generate()

    cv = CV.new Options.options.file_name
    
    if !Options.options.html_file.to_s.empty?

        cv.write_html Options.options.html_file
    end

    if !Options.options.pdf_file.to_s.empty?

        cv.write_pdf Options.options.pdf_file
    end

    if Options.options.html_file.to_s.empty? and Options.options.pdf_file.to_s.empty?

        puts cv.render
    end
end

Options.parse(ARGV)

generate

if Options.options.watch

    watchlist = [
        Options.options.file_name,
        File.join(File.dirname(__FILE__), "../lib/**/*")
    ]

    Filewatcher.new(watchlist, spinner: true).watch do |filename, event|
        
        puts "Input file updated."

        begin
            generate
        rescue StandardError => e
            puts e.message
        end
    end

end