fs            = require 'fs'
path          = require 'path'
{spawn, exec} = require 'child_process'
ncp           = (require 'ncp').ncp

TARGET = 'js'
SOURCE = 'coffee'

build = (source, target) ->
    ###
    #   Build sources directory.
    ###
    exec "coffee -c --no-header -o #{target} #{source}",
        (err, stdout, stderr) ->
            if err then console.err stderr.trim()
            else
                done source, target

done = (source, target) ->
    ###
    #   Show ok message and append to manifest file
    ###
    console.log "#{source}: successfully built in #{target}"

delete_recursive = (target) ->
    ###
    #   Delete directory or file recursively
    ###
    if not fs.existsSync target
        return
    if (fs.lstatSync target).isDirectory()
        files = fs.readdirSync target
        delete_recursive path.join target, f for f in files
        fs.rmdirSync target
        console.log "#{target}: Deleted on clean"
    else
        fs.unlinkSync target
        console.log "#{target}: Deleted on clean"

copy_recursive = (source, target) ->
    ###
    #   Copy directory recursively
    ###
    console.log ""
    console.log "COMPILING..."
    console.log ""

    target_dir = path.dirname target
    if not fs.existsSync target_dir
        fs.mkdirSync target_dir

    ncp source, target, (err)->
        if err then console.error err
        else
            done source, target

task 'build', 'Build coffeescript to javascript', (opt)->

    # Compile code folders
    for source in ['lib', 'test', 'routes', 'views']
        target = path.join TARGET, source
        source = path.join SOURCE, source
        build source, target

    # Compile standalone files
    for source in ['server.coffee']
        source = path.join SOURCE, source
        build source, TARGET

    # Dump static folders
    for source in ['views']
        target = path.join TARGET, source
        source = path.join SOURCE, source
        copy_recursive source, target

task 'clean', 'Remove last build', (opt)->
    ###
    #   Remove all in Manifest file and the file itself
    ###
    console.log ""
    console.log "CLEANING DIRECTORY..."
    console.log ""

    delete_recursive TARGET