# version 5.0.0
# Mojio Javascript SDK
#
MojioSDKState = require '../state/MojioSDKState'
MojioPushSDK = require './MojioPushSDK'
Module = require '../helpers/Module'

# The Mojio SDK. The Mojio SDK provides a means to easily use Mojio's Authentication Server, REST API, and Push API.
#
# The SDK works with four code segments: MojioModel, MojioAuth, MojioRest, and MojioPush that work together to provide
# methods for constructing fluent method calls.
#
# MojioModel provides mechanisms for specifying resources and data for resources.
#
# MojioAuth provides a security layer through OAuth2.
#
# MojioRest provides ways to make rest calls to the API and preform CRUD operations as well as update associates with
# secondary resources like permissions, images or tags.
#
# MojioPush methods provide a way to subscribe to changes that occur on primary resources. The Push SDK allows data to
# be sent to the application without it requesting it through transports like SignalR, Http Post, MQTT or others.
#
# Four programming styles are supported, synchronous, asynchronous with callbacks (node js style), asynchronous with promises,
# and asynchronous with reactive streams. Choose one style and or multiple, but each fluent call must operate in one of
# these modes at the end of the fluent chain.
#
# @example initate a fluent chain to retrieve a the vehicle given using a synchronous call. (don't do this very often).
#   sdk = new MojioSDK()
#   result = sdk.get().vehicle(vehicleId).sync()
#   ...
# @example initate a fluent chain to retrieve a the vehicle given using an asynchronous initiation with a callback.
#   sdk = new MojioSDK()
#   sdk.get().vehicle(vehicleId).callback((error, result) ->
#     ...
#   )
# @example initate a fluent chain to retrieve a the vehicle given using an asynchronous initiation with a promise.
#   sdk = new MojioSDK()
#   promise = sdk.get().vehicle(vehicleId).callback()
#   ...
#
# @example initate a fluent chain to retrieve a the vehicle given using an asynchronous initiation with a reative stream.
#   sdk = new MojioSDK()
#   stream = sdk.get().vehicle(vehicleId).callback()
#   ...
#
module.exports = class MojioSDK extends Module
    defaults = {
        sdk_env: 'nodejs'
        test: false
        environment: ''
    }
    # MojioSDK is a container for working with the Mojio API.
    # The sdk works with either the PushSDK, or can be paired down to just the REST SDK.
    # The SDK is fluent, so chains of calls are used to construct a desired outcome and then one of the four function
    # calls below initiates the the call to the API in one of the four programming styles.
    # @parameter {object} options
    # @public
    # @nodoc
    constructor: (options={}) ->

        # include the sdk level instance functions.
        @include if options.sdk then options.sdk else MojioPushSDK
        # include the style calls: callback, promise, reactive, async, or sync.
        if options.styles
            for style in options.styles
                @include style
        # don't had sdk and styles options to the instance literally.
        delete options.sdk
        delete options.styles
        # add the rest of the options or defaults to the instance.
        @configure(options, defaults)
        # instantiate the state of the fluent chain.
        @stateMachine = new MojioSDKState(options)
        super()

    # Configure the SDK's options
    #
    # @example Basic Configuration
    #   configure({ version: 'v2' })
    # @param [object] options Configurable options for the sdk.
    # @option options [String] version api version to use 'v1' or 'v2't
    # @return {object} this # @private
    # @nodoc
    configure: (options={}, defaults={}) ->
#        _.extend(@, options)
#        _.defaults(@, defaults)
        for property,value of options
            @[property] = value
        for property,value of defaults
            @[property] = value if !@[property]?
        return @

    # Sync initiates the fluent chain in a synchronous call, blocking until results are returned. Sync is one of four
    # ways to initiate fluent requests, one of which must be called for requests to be made. This is the least desireable
    # way to initiate a call because it will block until an answer is returned or a timeout occurs.
    # @public
    sync: () ->
        @stateMachine.initiate((error, result) ->
        )

        # make the rest call here.
        result = true
        return result

    # The 'callback' method initiates the fluent chain asynchronously by providing a callback(error, result) that will be called once
    # the request has returned. It is one of four ways to initiate fluent requests, one of which must be called for requests to be made.
    # In the case of a redirect (in the auth sdk) control will be returned to a url given and you must call authorize again with the results
    # until 'true' is given in the callback results.
    # @param callback {function} A function to call when the fluent chain is complete.
    # @public
    callback: (callback) ->
        # execute the rest request and return the result in the callback.
        @stateMachine.initiate(callback)

    # The 'redirect' method initiates the fluent chain by performing a redirect given the passed in redirecting
    # technology. The class or object passed in must follow the iRedirect interface and must have a function
    # called "redirect". For browser environments, pass in "{ redirect: (url) -> window.location = url }". For
    # NodeJS express, pass in ServerResponse ('res' passed into the route expression in the examples). For other
    # technologies, this class will depend on the framework used to reply to server requests. Note that even
    # in server environments, the redirect call may need to be wrapped as it is in the browser.
    # @param redirectClass {object} An object with a 'redirect' function implement.
    # @public
    # @ return {object} this
    redirect: (redirectClass=null) ->
        @stateMachine.redirect(redirectClass)
        return @

    # return the url formed by the fluent chain instead of actually making the rest call.
    # @return {string} Fully formed REST url
    url: () ->
        return @stateMachine.url()
    # return the internal state object. Used for debugging this sdk.
    # @return {object} Internal state object built up by the fluent chain.
    show: () ->
        return @stateMachine.show()

    me: () ->
        @setup()
        @stateMachine.setMethod('get')
        @stateMachine.setResource('me')
        return @