#!/usr/bin/env ruby

if ENV['USER'] == "root"
    puts "Must not be run as root!"
    exit 1
end

# A start-script for my local webserver. Mac-only and requires Homebrew

BASE = File.expand_path(File.dirname(File.dirname(__FILE__)))
PREFIX = `brew --prefix`.strip

CONF = "#{BASE}/conf"
PID  = "#{PREFIX}/var/run"
WWW  = "#{PREFIX}/www"


## Services ###

def cmd_exists(cmd)
    return system("which #{cmd} 2>&1 >/dev/null")
end

SERVICES = {}
if cmd_exists("php-fpm")
    SERVICES[:php] = {
        :bin  => `which php-fpm`.strip,
        :opts => "-p '/usr/local/var' -c '#{CONF}/php/php.ini' --fpm-config '#{CONF}/php/php-fpm.conf' --pid '#{PID}/php-fpm-pid'",
        :pid  => "#{PID}/php-fpm.pid"
    }
end
if cmd_exists("nginx")
    SERVICES[:nginx] = {
        :bin  => "sudo #{`which nginx`.strip}",
        :opts => "-c '#{CONF}/nginx/nginx.conf'",
        :pid  => "#{PID}/nginx.pid"
    }
end
if cmd_exists("memcached")
    SERVICES[:memcached] = {
        :bin  => `which memcached`.strip,
        :opts => "-d -P '#{PID}/memcached.pid' -u #{`whoami`.strip}",
        :pid  => "#{PID}/memcached.pid"
    }
end
if cmd_exists("mysql.server")
    SERVICES[:db] = {
        :bin  => "#{`which mysql.server`.strip} start",
        :opts => "",
        :pid  => "#{PREFIX}/var/mysql/#{`hostname`}.pid"
    }
end


## Functions ##

def start
    SERVICES.each_pair do |key,opts|
        if File.exist?(opts[:pid])
            puts " * #{key} is already running"
        else
            puts " * Starting #{key}"
            `#{opts[:bin]} #{opts[:opts]}`
        end
    end
end

def stop
    SERVICES.each_pair do |key,opts|
        if File.exist?(opts[:pid])
            puts " * Stopping #{key}"
            `sudo kill #{`cat #{opts[:pid]}`.strip}`
            `sudo rm #{opts[:pid]} >/dev/null 2>&1`
        else
            puts " * #{key} is not running"
        end
    end
end

def restart
    stop
    start
end

# Change the local webserver's root to the current directory
def chdir
    `rm -f #{WWW}`
    `ln -sf "#{`pwd`.strip}" "#{WWW}"`
    
    restart
end

def usage
    puts "Usage: web (start|stop|restart|chdir)"
    exit
end


## Bootstrap ##

if ARGV.length == 0
    usage
else
    case ARGV[0]
    when "start"
        puts "Starting web services"
        start
    when "stop"
        puts "Stopping web services"
        stop
    when "restart"
        restart
    when "chdir"
        chdir
    else
        usage
    end
end