#
# Copyright © 2015 by Redwood Labs
# All rights reserved.
#

EXTERNAL_LIBS = [
    'backbone'
    'jquery'
    'marked'
    'underscore'
    'underscore.inflections'
    'when'
    './vendor/email.js:emailjs'
]

########################################################################################################################

module.exports = (grunt)->

    grunt.loadTasks tasks for tasks in grunt.file.expand './node_modules/grunt-*/tasks'

    grunt.config.init

        compress:
            static:
                options:
                    mode: 'gzip'
                files: [
                    {expand: true, cwd:'./build/static', src:'**/*.css', dest:'./dist/'}
                    {expand: true, cwd:'./build/static', src:'**/*.html', dest:'./dist/'}
                    {expand: true, cwd:'./build/static', src:'**/*.js', dest:'./dist/'}
                    {expand: true, cwd:'./build/static', src:'**/*.json', dest:'./dist/'}
                ]

        coffee:
            dev:
                options:
                    sourceMap: true
                files: [expand:true, cwd:'./src/coffee', src:'**/*.coffee', dest:'./dist', ext:'.js']

        copy:
            server_source:
                files: [
                    {expand:true, cwd:'./src/server', src:'**/*.coffee', dest:'./build/', ext:'.coffee'}
                ]
            common_source:
                files: [
                    {expand:true, cwd:'./src/common', src:'**/*.coffee', dest:'./build/', ext:'.coffee'}
                ]
            assets_build:
                files: [
                    {expand:true, cwd:'./assets/', src:'**/*', dest:'./build/static/'}
                ]
            assets_dist:
                files: [
                    {expand:true, cwd:'./assets/', src:'**/*.mp3', dest:'./dist/'}
                    {expand:true, cwd:'./assets/', src:'**/*.png', dest:'./dist/'}
                ]

        clean:
            assets:    ['./build/static/data', './build/static/images']
            build:     ['./build']
            dist:      ['./dist']
            templates: ['./src/client/site/templates.js']

        jade:
            pages:
                options:
                    pretty: true
                files: [
                    expand: true
                    cwd:  './src/client/site'
                    src:  '**/index.jade'
                    dest: './build/static'
                    ext:  '.html'
                ]
            templates:
                options:
                    client: true
                    node: true
                    processName: (path)->
                        pathElements = path.split '\/'
                        while true
                            element = pathElements.shift()
                            break if element is 'site'
                        pathElements.pop()
                        name = pathElements.join '/'
                        name = name.replace '.jade', ''
                        return name
                files:
                    './src/client/site/templates.js': ['./src/client/site/**/!(index)*.jade']

        mochaTest:
            options:
                bail:     true
                color:    true
                reporter: 'dot'
                require: [
                    'coffee-script/register'
                    './src/test_helper.coffee'
                ]
                verbose: true
            src: ['./src/**/*.test.coffee']

        sass:
            all:
                files:
                    './build/static/main.css': [ './build/imports.scss' ]

        sass_globbing:
            all:
                files:
                    './build/imports.scss': [
                        './src/client/styles/main.scss'
                        './src/client/site/**/*.scss'
                    ]

        uglify:
            scripts:
                options:
                    maxLineLen: 20
                files: [
                    expand: true
                    cwd: './build/static'
                    src: '**/*.js'
                    dest: './build/static'
                ]

        watch:
            assets:
                files: ['./assets/**/*']
                tasks: ['copy:assets_build']
            client_source:
                files: ['./src/{client,common}/**/*.coffee']
                tasks: ['browserify:internal']
            server_source:
                files: ['./src/{common,server}/**/*.coffee']
                tasks: ['copy:server_source']
            jade_pages:
                files: ['./src/**/index.jade']
                tasks: ['jade:pages']
            jade_templates:
                files: ['./src/**/!(index).jade']
                tasks: ['jade:templates', 'browserify:internal']
            sass:
                files: ['./src/**/*.scss']
                tasks: ['sass']
            test:
                files: ['./src/**/*.coffee', './src/**/*.js', './test/**/*.coffee']
                tasks: ['test']

    # Compound Tasks ###################################################################################################

    grunt.registerTask 'build', ['jade', 'copy', 'css', 'browserify:external', 'browserify:internal']

    grunt.registerTask 'css', ['sass_globbing', 'sass']

    grunt.registerTask 'default', ['clean', 'start']

    grunt.registerTask 'deploy:prod', ['build', 'uglify', 'compress', 'copy:assets_dist', 'script:deploy:prod']

    grunt.registerTask 'prepublish', ['clean', 'coffee']

    grunt.registerTask 'start', ['build', 'script:start']

    grunt.registerTask 'test', ['mochaTest']

    # Code Tasks #######################################################################################################

    grunt.registerTask 'browserify:external', "Bundle 3rd-party libraries used in the app", ->
        grunt.file.mkdir './build/static'
        done = this.async()

        args = [].concat ("--require=#{lib}" for lib in EXTERNAL_LIBS), [
            '--outfile=./build/static/external.js'
        ]

        options = cmd:'browserify', args:args
        grunt.util.spawn options, (error)->
            console.log error if error?
            done()

    grunt.registerTask 'browserify:internal', "Bundle source files needed in the browser", ->
        grunt.file.mkdir './build/static'
        done = this.async()

        libs = []
        for lib in EXTERNAL_LIBS
            parts = lib.split ':'
            libs.push parts[parts.length-1]

        args = [].concat ("--external=#{lib}" for lib in libs), [
            '--extension=.coffee'
            '--outfile=./build/static/internal.js'
            '--transform=coffeeify'
            './src/client/client.coffee'
        ]

        options = cmd:'browserify', args:args
        grunt.util.spawn options, (error)->
            console.log error if error?
            done()

    grunt.registerTask 'use-local-deps', ->
        grunt.file.mkdir './node_modules'
        grunt.file.delete './node_modules/crafting-guide-common', force:true
        fs.symlinkSync '../../crafting-guide-common/', './node_modules/crafting-guide-common'

    # Script Tasks #####################################################################################################

    grunt.registerTask 'script:deploy:prod', "deploy code by copying to the production branch", ->
      done = this.async()
      grunt.util.spawn cmd:'./scripts/deploy', args:['--production'], opts:{stdio:'inherit'}, -> done()

    grunt.registerTask 'script:deploy:staging', "deploy code by copying to the staging branch", ->
      done = this.async()
      grunt.util.spawn cmd:'./scripts/deploy', args:['--staging'], opts:{stdio:'inherit'}, -> done()

    grunt.registerTask 'publish', 'publishes this package to NPM', ->
      done = this.async()
      grunt.util.spawn cmd:'./scripts/publish', opts:{stdio:'inherit'}, -> done()

    grunt.registerTask 'script:s3_upload', 'uploads all static content to S3', ->
      done = this.async()
      grunt.util.spawn cmd:'./scripts/s3_upload', opts:{stdio:'inherit'}, -> done()

    grunt.registerTask 'script:start', "start the server at port 8080", ->
      done = this.async()
      grunt.util.spawn cmd:'./scripts/start', opts:{stdio:'inherit'}, -> done()

    # Command-Line Argument Processing #################################################################################

    args = process.argv[..]
    while args.length > 0
        switch args[0]
            when '--grep'
                args.shift()
                grunt.config.merge mochaTest:options:grep:args[0]

        args.shift()