#!/usr/bin/env ruby
require 'optparse'
require 'pathname'

# How many methods / constants to return.
THRESHOLD = 5
MAC = !!/darwin/.match(RUBY_PLATFORM)
WINDOWS = !!/win/.match(RUBY_PLATFORM) if not MAC

def clear_database
  file = Pathname.new(ENV["HOME"]) + ".lookup/lookup.sqlite3"
  FileUtils.rm(file) if File.exists?(file) 
end

def display_url(result, options={})
  # if we're not on mac or windows we default to text output
  if OPTIONS[:text] or not (MAC || WINDOWS)
    s = options[:number] ? options[:number].to_s + ". " : ""
    # if we're a method then show the constant in parans
    s += "(#{result.constant.name}) " if result.respond_to?(:constant)
    s += "#{result.name} #{result.url}"
    puts s
  elsif MAC 
    `open #{result.url}`
  elsif WINDOWS 
    `start #{result.url}`
  end
end

def display_results(results, search_string)
  if results.empty?
    puts "There were no results matching #{search_string}."
    # if entry
    #   puts "There are no constants that match #{name} and contain #{entry}."
    # else
    #   puts "There are no constants that match #{name}"
    # end
  elsif results.size == 1
    display_url(results.first)
  elsif results.size <= THRESHOLD
    results.each_with_index do |result, i|
      display_url(result, :number => i+1)
    end
  else
    puts "Please refine your query, we found #{results.size} results (threshold is #{THRESHOLD})."
  end
end

if (local_lib = Pathname.new(File.expand_path('../../lib/lookup.rb', __FILE__))).file?
  require local_lib.to_s
else
  require 'rubygems'
  require 'lookup' 
end

OPTIONS = {}
output = nil
op=OptionParser.new do |opts|
  opts.banner = %Q{
    Usage: lookup <api> <constant|method> [method] [OPTIONS]
    
    Example: lookup v3.0.0 ActiveRecord::Base new
  }

  opts.on("-c", "--clear", "Clear database") do
    OPTIONS[:clear] = true
  end
  
  opts.on("-t", "--text", "Text only") do
    OPTIONS[:text] = true
  end
  
  opts.on("-v", "--version", "Version of lookup") do
    output = Lookup::VERSION
  end
end
op.parse!

clear_database if OPTIONS[:clear]
unless output
  begin
    search_string=ARGV[0..-1].join(" ")
    if search_string.strip.empty?
      puts op.help

    else
      results=Lookup.search(search_string)
      display_results(results, search_string)
    end
  rescue Lookup::APINotFound => e
    puts e.message
  end
else
  puts output
end