'use strict'

module.exports = (impl) ->
    {Types, items} = impl

    # t: current time, b: begInnIng value, c: change In value, d: duration
    # http://gsgd.co.uk/sandbox/jquery/easing/jquery.easing.1.3.js
    EASINGS =
        Linear: (t, b, c, d) ->
            c * (t/d) + b
        InQuad: (t, b, c, d) ->
            c*(t/=d)*t + b
        OutQuad: (t, b, c, d) ->
            -c *(t/=d)*(t-2) + b
        InOutQuad: (t, b, c, d) ->
            if (t/=d/2) < 1
                c/2*t*t + b
            else
                -c/2 * ((--t)*(t-2) - 1) + b
        InCubic: (t, b, c, d) ->
            c*(t/=d)*t*t + b
        OutCubic: (t, b, c, d) ->
            c*((t=t/d-1)*t*t + 1) + b
        InOutCubic: (t, b, c, d) ->
            if (t/=d/2) < 1
                c/2*t*t*t + b
            else
                c/2*((t-=2)*t*t + 2) + b
        InQuart: (t, b, c, d) ->
            c*(t/=d)*t*t*t + b
        OutQuart: (t, b, c, d) ->
            -c * ((t=t/d-1)*t*t*t - 1) + b
        InOutQuart: (t, b, c, d) ->
            if (t/=d/2) < 1
                c/2*t*t*t*t + b
            else
                -c/2 * ((t-=2)*t*t*t - 2) + b
        InQuint: (t, b, c, d) ->
            c*(t/=d)*t*t*t*t + b
        OutQuint: (t, b, c, d) ->
            c*((t=t/d-1)*t*t*t*t + 1) + b
        InOutQuint: (t, b, c, d) ->
            if (t/=d/2) < 1
                c/2*t*t*t*t*t + b
            else
                c/2*((t-=2)*t*t*t*t + 2) + b
        InSine: (t, b, c, d) ->
            -c * Math.cos(t/d * (Math.PI/2)) + c + b
        OutSine: (t, b, c, d) ->
            c * Math.sin(t/d * (Math.PI/2)) + b
        InOutSine: (t, b, c, d) ->
            -c/2 * (Math.cos(Math.PI*t/d) - 1) + b
        InExpo: (t, b, c, d) ->
            if t is 0
                b
            else
                c * Math.pow(2, 10 * (t/d - 1)) + b
        OutExpo: (t, b, c, d) ->
            if t is d
                b+c
            else
                c * (-Math.pow(2, -10 * t/d) + 1) + b
        InOutExpo: (t, b, c, d) ->
            if t is 0
                b
            else if t is d
                b+c
            else if (t/=d/2) < 1
                c/2 * Math.pow(2, 10 * (t - 1)) + b
            else
                c/2 * (-Math.pow(2, -10 * --t) + 2) + b
        InCirc: (t, b, c, d) ->
            -c * (Math.sqrt(1 - (t/=d)*t) - 1) + b
        OutCirc: (t, b, c, d) ->
            c * Math.sqrt(1 - (t=t/d-1)*t) + b
        InOutCirc: (t, b, c, d) ->
            if (t/=d/2) < 1
                -c/2 * (Math.sqrt(1 - t*t) - 1) + b
            else
                c/2 * (Math.sqrt(1 - (t-=2)*t) + 1) + b
        InElastic: (t, b, c, d) ->
            s=1.70158
            p=0
            a=c
            if t is 0
                b
            else if (t/=d) is 1
                b+c
            else
                p||=d*.3
                if a < Math.abs(c)
                    a=c
                    s=p/4
                else
                    s = p/(2*Math.PI) * Math.asin(c/a)
                -(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b
        OutElastic: (t, b, c, d) ->
            s=1.70158
            p=0
            a=c
            if t is 0
                b
            else if (t/=d) is 1
                b+c
            else
                p||=d*.3
                if a < Math.abs(c)
                    a=c
                    s=p/4
                else
                    s = p/(2*Math.PI) * Math.asin(c/a)
                a*Math.pow(2,-10*t) * Math.sin( (t*d-s)*(2*Math.PI)/p ) + c + b
        InOutElastic: (t, b, c, d) ->
            s=1.70158
            p=0
            a=c
            if t==0
                b
            else if (t/=d/2) is 2
                b+c
            else
                p||=d*(.3*1.5)
                if a < Math.abs(c)
                    a=c
                    s=p/4
                else
                    s = p/(2*Math.PI) * Math.asin (c/a)
                if t < 1
                    -.5*(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b
                else
                    a*Math.pow(2,-10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )*.5 + c + b
        InBack: (t, b, c, d, s=1.70158) ->
            c*(t/=d)*t*((s+1)*t - s) + b
        OutBack: (t, b, c, d, s=1.70158) ->
            c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b
        InOutBack: (t, b, c, d, s=1.70158) ->
            if (t/=d/2) < 1
                c/2*(t*t*(((s*=(1.525))+1)*t - s)) + b
            else
                c/2*((t-=2)*t*(((s*=(1.525))+1)*t + s) + 2) + b
        InBounce: (t, b, c, d) ->
            c - EASINGS.OutBounce(d-t, 0, c, d) + b
        OutBounce: (t, b, c, d) ->
            if (t/=d) < (1/2.75)
                c*(7.5625*t*t) + b
            else if t < (2/2.75)
                c*(7.5625*(t-=(1.5/2.75))*t + .75) + b
            else if t < (2.5/2.75)
                c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b
            else
                c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b
        InOutBounce: (t, b, c, d) ->
            if (t < d/2)
                EASINGS.InBounce(t*2, 0, c, d) * .5 + b
            else
                EASINGS.OutBounce(t*2-d, 0, c, d) * .5 + c*.5 + b

    DATA =
        progress: 0
        internalPropertyName: ''
        propertySetter: null
        isIntegerProperty: false
        easing: null
        startDelay: 0

    DATA: DATA

    createData: impl.utils.createDataCloner 'Animation', DATA

    create: (data) ->
        data.easing = EASINGS.Linear
        impl.Types.Animation.create.call @, data

    setPropertyAnimationTarget: (val) ->

    setPropertyAnimationProperty: (val) ->
        @_impl.internalPropertyName = "_#{val}"
        @_impl.propertySetter = impl.utils.SETTER_METHODS_NAMES[val]
        @_impl.isIntegerProperty = !!impl.utils.INTEGER_PROPERTIES[val]
        return

    setPropertyAnimationDuration: (val) ->

    setPropertyAnimationStartDelay: (val) ->
        @_impl.startTime += val - @_impl.startDelay
        @_impl.startDelay = val

    setPropertyAnimationLoopDelay: (val) ->

    setPropertyAnimationFrom: (val) ->
        @_impl.from = val

    setPropertyAnimationTo: (val) ->
        @_impl.to = val

    setPropertyAnimationUpdateData: (val) ->

    setPropertyAnimationUpdateProperty: (val) ->

    setPropertyAnimationEasingType: (val) ->
        @_impl.easing = EASINGS[val] or EASINGS.Linear

    getPropertyAnimationProgress: ->
        @_impl.progress