#!/usr/bin/ruby
require File.dirname(__FILE__) + '/../lib/request_log_analyzer'
require File.dirname(__FILE__) + '/../lib/cli/command_line_arguments'

def terminal_width(default = 81)
  IO.popen('stty -a') do |pipe|
    column_line = pipe.detect { |line| /(\d+) columns/ =~ line }
    width = column_line ? $1.to_i : default
  end
rescue 
  default  
end

# Parse the arguments given via commandline
begin
  arguments = CommandLine::Arguments.parse do |command_line|

    command_line.command(:install) do |install|
      install.parameters = 1
    end
    
    command_line.command(:strip) do |strip|
      strip.minimum_parameters = 1
      strip.option(:format, :alias => :f, :default => 'rails')      
      strip.option(:output, :alias => :o)
      strip.switch(:discard_teaser_lines, :t)
      strip.switch(:keep_junk_lines, :j)      
    end
    
    command_line.option(:format, :alias => :f, :default => 'rails')
    command_line.option(:file, :alias => :e)
    command_line.switch(:assume_correct_order)
    
    command_line.option(:aggregator, :alias => :a, :multiple => true)
    command_line.option(:database, :alias => :d)    

    # filtering options
    command_line.option(:select, :multiple => true, :parameters => 2)
    command_line.option(:reject, :multiple => true, :parameters => 2)
    command_line.option(:after)
    command_line.option(:before)    
    
    command_line.switch(:boring, :b)
    command_line.option(:output, :alias => :o, :default => 'FixedWidth')    
    command_line.option(:report_width, :default => terminal_width - 1)
    
    command_line.switch(:debug)
    
    command_line.minimum_parameters = 1    
  end
  
rescue CommandLine::Error => e
  puts "ARGUMENT ERROR: " + e.message if e.message
  puts
  puts "Usage: request-log-analyzer [LOGFILES*] <OPTIONS>"
  puts
  puts "Input options:"
  puts "  --format <format>, -f:     Uses the specified log file format. Defaults to rails."
  puts "  --after <date>             Only consider requests from <date> or later."
  puts "  --before <date>            Only consider requests before <date>."  
  puts "  --select <field> <value>   Only consider requests where <field> matches <value>."        
  puts "  --reject <field> <value>   Only consider requests where <field> does not match <value>."    
  puts
  puts "Output options:"
  puts "  --boring, -b               Output reports without ASCII colors."
  puts "  --database <filename>, -d: Creates an SQLite3 database of all the parsed request information."
  puts "  --debug                    Print debug information while parsing."
  puts "  --file <filename>          Output to file."
  puts "  --output <format>          Output format. Supports 'HTML' and 'FixedWidth' (default)"  
  puts 
  puts "Examples:"
  puts "  request-log-analyzer development.log"
  puts "  request-log-analyzer -b mongrel.0.log mongrel.1.log mongrel.2.log "
  puts "  request-log-analyzer --format merb -d requests.db production.log"
  puts
  puts "To install rake tasks in your Rails application, "
  puts "run the following command in your application's root directory:"
  puts
  puts "  request-log-analyzer install rails"
  exit(0) 
end

def install_rake_tasks(install_type)
  if install_type == 'rails'
    require 'ftools'
    if File.directory?('./lib/tasks/')
      File.copy(File.dirname(__FILE__) + '/../tasks/request_log_analyzer.rake', './lib/tasks/request_log_analyze.rake')
      puts "Installed rake tasks."
      puts "To use, run: rake log:analyze"
    else
      puts "Cannot find /lib/tasks folder. Are you in your Rails directory?"
      puts "Installation aborted."
    end
  else
    raise "Cannot perform this install type! (#{install_type})"
  end
end


case arguments.command
when :install
  install_rake_tasks(arguments.parameters[0])
when :strip
  require File.dirname(__FILE__) + '/../lib/request_log_analyzer/log_processor'  
  RequestLogAnalyzer::LogProcessor.build(:strip, arguments).run!
else 
  puts "Request-log-analyzer, by Willem van Bergen and Bart ten Brinke - version #{RequestLogAnalyzer::VERSION}"  
  puts "Website: http://github.com/wvanbergen/request-log-analyzer"
  puts

  # Run the request_log_analyzer!
  RequestLogAnalyzer::Controller.build(arguments).run!
end