'use strict';

var axisHoverFormat = require('../../plots/cartesian/axis_format_attributes').axisHoverFormat;
var texttemplateAttrs = require('../../plots/template_attributes').texttemplateAttrs;
var hovertemplateAttrs = require('../../plots/template_attributes').hovertemplateAttrs;
var colorScaleAttrs = require('../../components/colorscale/attributes');
var fontAttrs = require('../../plots/font_attributes');
var dash = require('../../components/drawing/attributes').dash;
var pattern = require('../../components/drawing/attributes').pattern;

var Drawing = require('../../components/drawing');
var constants = require('./constants');

var extendFlat = require('../../lib/extend').extendFlat;

var makeFillcolorAttr = require('./fillcolor_attribute');

function axisPeriod(axis) {
    return {
        valType: 'any',
        dflt: 0,
        editType: 'calc',
        description: [
            'Only relevant when the axis `type` is *date*.',
            'Sets the period positioning in milliseconds or *M<n>* on the ' + axis + ' axis.',
            'Special values in the form of *M<n>* could be used to declare',
            'the number of months. In this case `n` must be a positive integer.'
        ].join(' ')
    };
}

function axisPeriod0(axis) {
    return {
        valType: 'any',
        editType: 'calc',
        description: [
            'Only relevant when the axis `type` is *date*.',
            'Sets the base for period positioning in milliseconds or date string on the ' + axis + ' axis.',
            'When `' + axis + 'period` is round number of weeks,',
            'the `' + axis + 'period0` by default would be on a Sunday i.e. 2000-01-02,',
            'otherwise it would be at 2000-01-01.'
        ].join(' ')
    };
}

function axisPeriodAlignment(axis) {
    return {
        valType: 'enumerated',
        values: [
            'start', 'middle', 'end'
        ],
        dflt: 'middle',
        editType: 'calc',
        description: [
            'Only relevant when the axis `type` is *date*.',
            'Sets the alignment of data points on the ' + axis + ' axis.'
        ].join(' ')
    };
}

module.exports = {
    x: {
        valType: 'data_array',
        editType: 'calc+clearAxisTypes',
        anim: true,
        description: 'Sets the x coordinates.'
    },
    x0: {
        valType: 'any',
        dflt: 0,
        editType: 'calc+clearAxisTypes',
        anim: true,
        description: [
            'Alternate to `x`.',
            'Builds a linear space of x coordinates.',
            'Use with `dx`',
            'where `x0` is the starting coordinate and `dx` the step.'
        ].join(' ')
    },
    dx: {
        valType: 'number',
        dflt: 1,
        editType: 'calc',
        anim: true,
        description: [
            'Sets the x coordinate step.',
            'See `x0` for more info.'
        ].join(' ')
    },
    y: {
        valType: 'data_array',
        editType: 'calc+clearAxisTypes',
        anim: true,
        description: 'Sets the y coordinates.'
    },
    y0: {
        valType: 'any',
        dflt: 0,
        editType: 'calc+clearAxisTypes',
        anim: true,
        description: [
            'Alternate to `y`.',
            'Builds a linear space of y coordinates.',
            'Use with `dy`',
            'where `y0` is the starting coordinate and `dy` the step.'
        ].join(' ')
    },
    dy: {
        valType: 'number',
        dflt: 1,
        editType: 'calc',
        anim: true,
        description: [
            'Sets the y coordinate step.',
            'See `y0` for more info.'
        ].join(' ')
    },

    xperiod: axisPeriod('x'),
    yperiod: axisPeriod('y'),
    xperiod0: axisPeriod0('x0'),
    yperiod0: axisPeriod0('y0'),
    xperiodalignment: axisPeriodAlignment('x'),
    yperiodalignment: axisPeriodAlignment('y'),
    xhoverformat: axisHoverFormat('x'),
    yhoverformat: axisHoverFormat('y'),

    offsetgroup: {
        valType: 'string',
        dflt: '',
        editType: 'calc',
        description: [
            'Set several traces linked to the same position axis',
            'or matching axes to the same',
            'offsetgroup where bars of the same position coordinate will line up.'
        ].join(' ')
    },

    alignmentgroup: {
        valType: 'string',
        dflt: '',
        editType: 'calc',
        description: [
            'Set several traces linked to the same position axis',
            'or matching axes to the same',
            'alignmentgroup. This controls whether bars compute their positional',
            'range dependently or independently.'
        ].join(' ')
    },

    stackgroup: {
        valType: 'string',
        dflt: '',
        editType: 'calc',
        description: [
            'Set several scatter traces (on the same subplot) to the same',
            'stackgroup in order to add their y values (or their x values if',
            '`orientation` is *h*). If blank or omitted this trace will not be',
            'stacked. Stacking also turns `fill` on by default, using *tonexty*',
            '(*tonextx*) if `orientation` is *h* (*v*) and sets the default',
            '`mode` to *lines* irrespective of point count.',
            'You can only stack on a numeric (linear or log) axis.',
            'Traces in a `stackgroup` will only fill to (or be filled to) other',
            'traces in the same group. With multiple `stackgroup`s or some',
            'traces stacked and some not, if fill-linked traces are not already',
            'consecutive, the later ones will be pushed down in the drawing order.'
        ].join(' ')
    },
    orientation: {
        valType: 'enumerated',
        values: ['v', 'h'],
        editType: 'calc',
        description: [
            'Only relevant in the following cases:',
            '1. when `scattermode` is set to *group*.',
            '2. when `stackgroup` is used, and only the first',
            '`orientation` found in the `stackgroup` will be used - including',
            'if `visible` is *legendonly* but not if it is `false`. Sets the',
            'stacking direction. With *v* (*h*), the y (x) values of subsequent',
            'traces are added. Also affects the default value of `fill`.'
        ].join(' ')
    },
    groupnorm: {
        valType: 'enumerated',
        values: ['', 'fraction', 'percent'],
        dflt: '',
        editType: 'calc',
        description: [
            'Only relevant when `stackgroup` is used, and only the first',
            '`groupnorm` found in the `stackgroup` will be used - including',
            'if `visible` is *legendonly* but not if it is `false`.',
            'Sets the normalization for the sum of this `stackgroup`.',
            'With *fraction*, the value of each trace at each location is',
            'divided by the sum of all trace values at that location.',
            '*percent* is the same but multiplied by 100 to show percentages.',
            'If there are multiple subplots, or multiple `stackgroup`s on one',
            'subplot, each will be normalized within its own set.'
        ].join(' ')
    },
    stackgaps: {
        valType: 'enumerated',
        values: ['infer zero', 'interpolate'],
        dflt: 'infer zero',
        editType: 'calc',
        description: [
            'Only relevant when `stackgroup` is used, and only the first',
            '`stackgaps` found in the `stackgroup` will be used - including',
            'if `visible` is *legendonly* but not if it is `false`.',
            'Determines how we handle locations at which other traces in this',
            'group have data but this one does not.',
            'With *infer zero* we insert a zero at these locations.',
            'With *interpolate* we linearly interpolate between existing',
            'values, and extrapolate a constant beyond the existing values.'
            // TODO - implement interrupt mode
            // '*interrupt* omits this trace from the stack at this location by',
            // 'dropping abruptly, midway between the existing and missing locations.'
        ].join(' ')
    },

    text: {
        valType: 'string',
        dflt: '',
        arrayOk: true,
        editType: 'calc',
        description: [
            'Sets text elements associated with each (x,y) pair.',
            'If a single string, the same string appears over',
            'all the data points.',
            'If an array of string, the items are mapped in order to the',
            'this trace\'s (x,y) coordinates.',
            'If trace `hoverinfo` contains a *text* flag and *hovertext* is not set,',
            'these elements will be seen in the hover labels.'
        ].join(' ')
    },

    texttemplate: texttemplateAttrs({}, {

    }),
    hovertext: {
        valType: 'string',
        dflt: '',
        arrayOk: true,
        editType: 'style',
        description: [
            'Sets hover text elements associated with each (x,y) pair.',
            'If a single string, the same string appears over',
            'all the data points.',
            'If an array of string, the items are mapped in order to the',
            'this trace\'s (x,y) coordinates.',
            'To be seen, trace `hoverinfo` must contain a *text* flag.'
        ].join(' ')
    },
    mode: {
        valType: 'flaglist',
        flags: ['lines', 'markers', 'text'],
        extras: ['none'],
        editType: 'calc',
        description: [
            'Determines the drawing mode for this scatter trace.',
            'If the provided `mode` includes *text* then the `text` elements',
            'appear at the coordinates. Otherwise, the `text` elements',
            'appear on hover.',
            'If there are less than ' + constants.PTS_LINESONLY + ' points',
            'and the trace is not stacked',
            'then the default is *lines+markers*. Otherwise, *lines*.'
        ].join(' ')
    },
    hoveron: {
        valType: 'flaglist',
        flags: ['points', 'fills'],
        editType: 'style',
        description: [
            'Do the hover effects highlight individual points (markers or',
            'line points) or do they highlight filled regions?',
            'If the fill is *toself* or *tonext* and there are no markers',
            'or text, then the default is *fills*, otherwise it is *points*.'
        ].join(' ')
    },
    hovertemplate: hovertemplateAttrs({}, {
        keys: constants.eventDataKeys
    }),

    line: {
        color: {
            valType: 'color',
            editType: 'style',
            anim: true,
            description: 'Sets the line color.'
        },
        width: {
            valType: 'number',
            min: 0,
            dflt: 2,
            editType: 'style',
            anim: true,
            description: 'Sets the line width (in px).'
        },
        shape: {
            valType: 'enumerated',
            values: ['linear', 'spline', 'hv', 'vh', 'hvh', 'vhv'],
            dflt: 'linear',
            editType: 'plot',
            description: [
                'Determines the line shape.',
                'With *spline* the lines are drawn using spline interpolation.',
                'The other available values correspond to step-wise line shapes.'
            ].join(' ')
        },
        smoothing: {
            valType: 'number',
            min: 0,
            max: 1.3,
            dflt: 1,
            editType: 'plot',
            description: [
                'Has an effect only if `shape` is set to *spline*',
                'Sets the amount of smoothing.',
                '*0* corresponds to no smoothing (equivalent to a *linear* shape).'
            ].join(' ')
        },
        dash: extendFlat({}, dash, {editType: 'style'}),
        backoff: { // we want to have a similar option for the start of the line
            valType: 'number',
            min: 0,
            dflt: 'auto',
            arrayOk: true,
            editType: 'plot',
            description: [
                'Sets the line back off from the end point of the nth line segment (in px).',
                'This option is useful e.g. to avoid overlap with arrowhead markers.',
                'With *auto* the lines would trim before markers if `marker.angleref` is set to *previous*.'
            ].join(' ')
        },
        simplify: {
            valType: 'boolean',
            dflt: true,
            editType: 'plot',
            description: [
                'Simplifies lines by removing nearly-collinear points. When transitioning',
                'lines, it may be desirable to disable this so that the number of points',
                'along the resulting SVG path is unaffected.'
            ].join(' ')
        },
        editType: 'plot'
    },

    connectgaps: {
        valType: 'boolean',
        dflt: false,
        editType: 'calc',
        description: [
            'Determines whether or not gaps',
            '(i.e. {nan} or missing values)',
            'in the provided data arrays are connected.'
        ].join(' ')
    },
    cliponaxis: {
        valType: 'boolean',
        dflt: true,
        editType: 'plot',
        description: [
            'Determines whether or not markers and text nodes',
            'are clipped about the subplot axes.',
            'To show markers and text nodes above axis lines and tick labels,',
            'make sure to set `xaxis.layer` and `yaxis.layer` to *below traces*.'
        ].join(' ')
    },

    fill: {
        valType: 'enumerated',
        values: ['none', 'tozeroy', 'tozerox', 'tonexty', 'tonextx', 'toself', 'tonext'],
        editType: 'calc',
        description: [
            'Sets the area to fill with a solid color.',
            'Defaults to *none* unless this trace is stacked, then it gets',
            '*tonexty* (*tonextx*) if `orientation` is *v* (*h*)',
            'Use with `fillcolor` if not *none*.',
            '*tozerox* and *tozeroy* fill to x=0 and y=0 respectively.',
            '*tonextx* and *tonexty* fill between the endpoints of this',
            'trace and the endpoints of the trace before it, connecting those',
            'endpoints with straight lines (to make a stacked area graph);',
            'if there is no trace before it, they behave like *tozerox* and',
            '*tozeroy*.',
            '*toself* connects the endpoints of the trace (or each segment',
            'of the trace if it has gaps) into a closed shape.',
            '*tonext* fills the space between two traces if one completely',
            'encloses the other (eg consecutive contour lines), and behaves like',
            '*toself* if there is no trace before it. *tonext* should not be',
            'used if one trace does not enclose the other.',
            'Traces in a `stackgroup` will only fill to (or be filled to) other',
            'traces in the same group. With multiple `stackgroup`s or some',
            'traces stacked and some not, if fill-linked traces are not already',
            'consecutive, the later ones will be pushed down in the drawing order.'
        ].join(' ')
    },
    fillcolor: makeFillcolorAttr(true),
    fillgradient: extendFlat({
        type: {
            valType: 'enumerated',
            values: ['radial', 'horizontal', 'vertical', 'none'],
            dflt: 'none',
            editType: 'calc',
            description: [
                'Sets the type/orientation of the color gradient for the fill.',
                'Defaults to *none*.'
            ].join(' ')
        },
        start: {
            valType: 'number',
            editType: 'calc',
            description: [
                'Sets the gradient start value.',
                'It is given as the absolute position on the axis determined by',
                'the orientiation. E.g., if orientation is *horizontal*, the',
                'gradient will be horizontal and start from the x-position',
                'given by start. If omitted, the gradient starts at the lowest',
                'value of the trace along the respective axis.',
                'Ignored if orientation is *radial*.'
            ].join(' ')
        },
        stop: {
            valType: 'number',
            editType: 'calc',
            description: [
                'Sets the gradient end value.',
                'It is given as the absolute position on the axis determined by',
                'the orientiation. E.g., if orientation is *horizontal*, the',
                'gradient will be horizontal and end at the x-position',
                'given by end. If omitted, the gradient ends at the highest',
                'value of the trace along the respective axis.',
                'Ignored if orientation is *radial*.'
            ].join(' ')
        },
        colorscale: {
            valType: 'colorscale',
            editType: 'style',
            description: [
                'Sets the fill gradient colors as a color scale.',
                'The color scale is interpreted as a gradient',
                'applied in the direction specified by *orientation*,',
                'from the lowest to the highest value of the scatter',
                'plot along that axis, or from the center to the most',
                'distant point from it, if orientation is *radial*.'
            ].join(' ')
        },
        editType: 'calc',
        description: [
            'Sets a fill gradient.',
            'If not specified, the fillcolor is used instead.'
        ].join(' ')
    }),
    fillpattern: pattern,
    marker: extendFlat({
        symbol: {
            valType: 'enumerated',
            values: Drawing.symbolList,
            dflt: 'circle',
            arrayOk: true,
            editType: 'style',
            description: [
                'Sets the marker symbol type.',
                'Adding 100 is equivalent to appending *-open* to a symbol name.',
                'Adding 200 is equivalent to appending *-dot* to a symbol name.',
                'Adding 300 is equivalent to appending *-open-dot*',
                'or *dot-open* to a symbol name.'
            ].join(' ')
        },
        opacity: {
            valType: 'number',
            min: 0,
            max: 1,
            arrayOk: true,
            editType: 'style',
            anim: true,
            description: 'Sets the marker opacity.'
        },
        angle: {
            valType: 'angle',
            dflt: 0,
            arrayOk: true,
            editType: 'plot',
            anim: false, // TODO: possibly set to true in future
            description: [
                'Sets the marker angle in respect to `angleref`.'
            ].join(' ')
        },
        angleref: {
            valType: 'enumerated',
            values: ['previous', 'up'],
            dflt: 'up',
            editType: 'plot',
            anim: false,
            description: [
                'Sets the reference for marker angle.',
                'With *previous*, angle 0 points along the line from the previous point to this one.',
                'With *up*, angle 0 points toward the top of the screen.'
            ].join(' ')
        },
        standoff: {
            valType: 'number',
            min: 0,
            dflt: 0,
            arrayOk: true,
            editType: 'plot',
            anim: true,
            description: [
                'Moves the marker away from the data point in the direction of `angle` (in px).',
                'This can be useful for example if you have another marker at this',
                'location and you want to point an arrowhead marker at it.'
            ].join(' ')
        },
        size: {
            valType: 'number',
            min: 0,
            dflt: 6,
            arrayOk: true,
            editType: 'calc',
            anim: true,
            description: 'Sets the marker size (in px).'
        },
        maxdisplayed: {
            valType: 'number',
            min: 0,
            dflt: 0,
            editType: 'plot',
            description: [
                'Sets a maximum number of points to be drawn on the graph.',
                '*0* corresponds to no limit.'
            ].join(' ')
        },
        sizeref: {
            valType: 'number',
            dflt: 1,
            editType: 'calc',
            description: [
                'Has an effect only if `marker.size` is set to a numerical array.',
                'Sets the scale factor used to determine the rendered size of',
                'marker points. Use with `sizemin` and `sizemode`.'
            ].join(' ')
        },
        sizemin: {
            valType: 'number',
            min: 0,
            dflt: 0,
            editType: 'calc',
            description: [
                'Has an effect only if `marker.size` is set to a numerical array.',
                'Sets the minimum size (in px) of the rendered marker points.'
            ].join(' ')
        },
        sizemode: {
            valType: 'enumerated',
            values: ['diameter', 'area'],
            dflt: 'diameter',
            editType: 'calc',
            description: [
                'Has an effect only if `marker.size` is set to a numerical array.',
                'Sets the rule for which the data in `size` is converted',
                'to pixels.'
            ].join(' ')
        },

        line: extendFlat({
            width: {
                valType: 'number',
                min: 0,
                arrayOk: true,
                editType: 'style',
                anim: true,
                description: 'Sets the width (in px) of the lines bounding the marker points.'
            },
            editType: 'calc'
        },
            colorScaleAttrs('marker.line', {anim: true})
        ),
        gradient: {
            type: {
                valType: 'enumerated',
                values: ['radial', 'horizontal', 'vertical', 'none'],
                arrayOk: true,
                dflt: 'none',
                editType: 'calc',
                description: [
                    'Sets the type of gradient used to fill the markers'
                ].join(' ')
            },
            color: {
                valType: 'color',
                arrayOk: true,
                editType: 'calc',
                description: [
                    'Sets the final color of the gradient fill:',
                    'the center color for radial, the right for horizontal,',
                    'or the bottom for vertical.',
                ].join(' ')
            },
            editType: 'calc'
        },
        editType: 'calc'
    },
        colorScaleAttrs('marker', {anim: true})
    ),
    selected: {
        marker: {
            opacity: {
                valType: 'number',
                min: 0,
                max: 1,
                editType: 'style',
                description: 'Sets the marker opacity of selected points.'
            },
            color: {
                valType: 'color',
                editType: 'style',
                description: 'Sets the marker color of selected points.'
            },
            size: {
                valType: 'number',
                min: 0,
                editType: 'style',
                description: 'Sets the marker size of selected points.'
            },
            editType: 'style'
        },
        textfont: {
            color: {
                valType: 'color',
                editType: 'style',
                description: 'Sets the text font color of selected points.'
            },
            editType: 'style'
        },
        editType: 'style'
    },
    unselected: {
        marker: {
            opacity: {
                valType: 'number',
                min: 0,
                max: 1,
                editType: 'style',
                description: 'Sets the marker opacity of unselected points, applied only when a selection exists.'
            },
            color: {
                valType: 'color',
                editType: 'style',
                description: 'Sets the marker color of unselected points, applied only when a selection exists.'
            },
            size: {
                valType: 'number',
                min: 0,
                editType: 'style',
                description: 'Sets the marker size of unselected points, applied only when a selection exists.'
            },
            editType: 'style'
        },
        textfont: {
            color: {
                valType: 'color',
                editType: 'style',
                description: 'Sets the text font color of unselected points, applied only when a selection exists.'
            },
            editType: 'style'
        },
        editType: 'style'
    },

    textposition: {
        valType: 'enumerated',
        values: [
            'top left', 'top center', 'top right',
            'middle left', 'middle center', 'middle right',
            'bottom left', 'bottom center', 'bottom right'
        ],
        dflt: 'middle center',
        arrayOk: true,
        editType: 'calc',
        description: [
            'Sets the positions of the `text` elements',
            'with respects to the (x,y) coordinates.'
        ].join(' ')
    },
    textfont: fontAttrs({
        editType: 'calc',
        colorEditType: 'style',
        arrayOk: true,
        description: 'Sets the text font.'
    }),
    zorder: {
        valType: 'integer',
        dflt: 0,
        editType: 'plot',
        description: [
            'Sets the layer on which this trace is displayed, relative to',
            'other SVG traces on the same subplot. SVG traces with higher `zorder`',
            'appear in front of those with lower `zorder`.'
        ].join(' ')
    }
};