/**
* Copyright (c) 2017 ~ present NAVER Corp.
* billboard.js project is licensed under the MIT license
*/
/**
* tooltip config options
*/
export default {
/**
* Tooltip options
* @name tooltip
* @memberof Options
* @type {object}
* @property {object} tooltip Tooltip object
* @property {boolean} [tooltip.show=true] Show or hide tooltip.
* @property {boolean} [tooltip.doNotHide=false] Make tooltip keep showing not hiding on interaction.
* @property {boolean} [tooltip.grouped=true] Set if tooltip is grouped or not for the data points.
* - **NOTE:** The overlapped data points will be displayed as grouped even if set false.
* @property {boolean} [tooltip.linked=false] Set if tooltips on all visible charts with like x points are shown together when one is shown.
* @property {string} [tooltip.linked.name=""] Groping name for linked tooltip.<br>If specified, linked tooltip will be groped interacting to be worked only with the same name.
* @property {Function} [tooltip.format.title] Set format for the title of tooltip.<br>
* Specified function receives x of the data point to show.
* @property {Function} [tooltip.format.name] Set format for the name of each data in tooltip.<br>
* Specified function receives name, ratio, id and index of the data point to show. ratio will be undefined if the chart is not donut/pie/gauge.
* @property {Function} [tooltip.format.value] Set format for the value of each data value in tooltip. If undefined returned, the row of that value will be skipped to be called.
* - Will pass following arguments to the given function:
* - `value {string}`: Value of the data point. If data row contains multiple or ranged(ex. candlestick, area range, etc.) value, formatter will be called as value length.
* - `ratio {number}`: Ratio of the data point in the `pie/donut/gauge` and `area/bar` when contains grouped data. Otherwise is `undefined`.
* - `id {string}`: id of the data point
* - `index {number}`: Index of the data point
* @property {Function} [tooltip.position] Set custom position function for the tooltip.<br>
* This option can be used to modify the tooltip position by returning object that has top and left.
* - Will pass following arguments to the given function:
* - `data {Array}`: Current selected data array object.
* - `width {number}`: Width of tooltip.
* - `height {number}`: Height of tooltip.
* - `element {SVGElement}`: Tooltip event bound element
* - `pos {object}`: Current position of the tooltip.
* @property {Function|object} [tooltip.contents] Set custom HTML for the tooltip.<br>
* If tooltip.grouped is true, data includes multiple data points.<br><br>
* Specified function receives `data` array and `defaultTitleFormat`, `defaultValueFormat` and `color` functions of the data point to show.
* - **Note:**
* - defaultTitleFormat:
* - if `axis.x.tick.format` option will be used if set.
* - otherwise, will return function based on tick format type(category, timeseries).
* - defaultValueFormat:
* - for Arc type (except gauge, radar), the function will return value from `(ratio * 100).toFixed(1)`.
* - for Axis based types, will be used `axis.[y|y2].tick.format` option value if is set.
* - otherwise, will parse value and return as number.
* @property {string|HTMLElement} [tooltip.contents.bindto=undefined] Set CSS selector or element reference to bind tooltip.
* - **NOTE:** When is specified, will not be updating tooltip's position.
* @property {string} [tooltip.contents.template=undefined] Set tooltip's template.<br><br>
* Within template, below syntax will be replaced using template-like syntax string:
* - **{{ ... }}**: the doubly curly brackets indicate loop block for data rows.
* - **{=CLASS_TOOLTIP}**: default tooltip class name `bb-tooltip`.
* - **{=CLASS_TOOLTIP_NAME}**: default tooltip data class name (ex. `bb-tooltip-name-data1`)
* - **{=TITLE}**: title value.
* - **{=COLOR}**: data color.
* - **{=NAME}**: data id value.
* - **{=VALUE}**: data value.
* @property {object} [tooltip.contents.text=undefined] Set additional text content within data loop, using template syntax.
* - **NOTE:** It should contain `{ key: Array, ... }` value
* - 'key' name is used as substitution within template as '{=KEY}'
* - The value array length should match with the data length
* @property {boolean} [tooltip.init.show=false] Show tooltip at the initialization.
* @property {number} [tooltip.init.x=0] Set x Axis index(or index for Arc(donut, gauge, pie) types) to be shown at the initialization.
* @property {object} [tooltip.init.position] Set the position of tooltip at the initialization.
* @property {Function} [tooltip.onshow] Set a callback that will be invoked before the tooltip is shown.
* @property {Function} [tooltip.onhide] Set a callback that will be invoked before the tooltip is hidden.
* @property {Function} [tooltip.onshown] Set a callback that will be invoked after the tooltip is shown
* @property {Function} [tooltip.onhidden] Set a callback that will be invoked after the tooltip is hidden.
* @property {string|Function|null} [tooltip.order=null] Set tooltip data display order.<br><br>
* **Available Values:**
* - `desc`: In descending data value order
* - `asc`: In ascending data value order
* - `null`: It keeps the data display order<br>
* **NOTE:** When `data.groups` is set, the order will follow as the stacked graph order.<br>
* If want to order as data bound, set any value rather than asc, desc or null. (ex. empty string "")
* - `function(data1, data2) { ... }`: [Array.sort compareFunction](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/sort#Parameters)
* @see [Demo: Hide Tooltip](https://naver.github.io/billboard.js/demo/#Tooltip.HideTooltip)
* @see [Demo: Tooltip Grouping](https://naver.github.io/billboard.js/demo/#Tooltip.TooltipGrouping)
* @see [Demo: Tooltip Format](https://naver.github.io/billboard.js/demo/#Tooltip.TooltipFormat)
* @see [Demo: Linked Tooltip](https://naver.github.io/billboard.js/demo/#Tooltip.LinkedTooltips)
* @see [Demo: Tooltip Position](https://naver.github.io/billboard.js/demo/#Tooltip.TooltipPosition)
* @see [Demo: Tooltip Template](https://naver.github.io/billboard.js/demo/#Tooltip.TooltipTemplate)
* @example
* tooltip: {
* show: true,
* doNotHide: true,
* grouped: false,
* format: {
* title: function(x) { return "Data " + x; },
* name: function(name, ratio, id, index) { return name; },
*
* // If data row contains multiple or ranged(ex. candlestick, area range, etc.) value,
* // formatter will be called as value length times.
* value: function(value, ratio, id, index) { return ratio; }
* },
* position: function(data, width, height, element, pos) {
* // data: [{x, index, id, name, value}, ...]
* // width: Tooltip width
* // height: Tooltip height
* // element: Tooltip event bound element
* // pos: {
* // x: Current mouse event x position,
* // y: Current mouse event y position,
* // xAxis: Current x Axis position (the value is given for axis based chart type only)
* // yAxis: Current y Axis position value or function(the value is given for axis based chart type only)
* // }
*
* // yAxis will work differently per data lenghts
* // - a) Single data: `yAxis` will return `number` value
* // - b) Multiple data: `yAxis` will return a function with property value
*
* // a) Single data:
* // Get y coordinate
* pos.yAxis; // y axis coordinate value of current data point
*
* // b) Multiple data:
* // Get y coordinate of value 500, where 'data1' scales(y or y2).
* // When 'data.axes' option is used, data can bound to different axes.
* // - when "data.axes={data1: 'y'}", wil return y value from y axis scale.
* // - when "data.axes={data1: 'y2'}", wil return y value from y2 axis scale.
* pos.yAxis(500, "data1"); // will return y coordinate value of data1
*
* pos.yAxis(500); // get y coordinate with value of 500, using y axis scale
* pos.yAxis(500, null, "y2"); // get y coordinate with value of 500, using y2 axis scale
*
* return {
* top: 0,
* left: 0
* }
* },
*
* contents: function(d, defaultTitleFormat, defaultValueFormat, color) {
* return ... // formatted html as you want
* },
*
* // specify tooltip contents using template
* // - example of HTML returned:
* // <ul class="bb-tooltip">
* // <li class="bb-tooltip-name-data1"><span>250</span><br><span style="color:#00c73c">data1</span></li>
* // <li class="bb-tooltip-name-data2"><span>50</span><br><span style="color:#fa7171">data2</span></li>
* // </ul>
* contents: {
* bindto: "#tooltip",
* template: '<ul class={=CLASS_TOOLTIP}>{{' +
* '<li class="{=CLASS_TOOLTIP_NAME}"><span>{=VALUE}</span><br>' +
* '<span style=color:{=COLOR}>{=NAME}</span></li>' +
* '}}</ul>'
* }
*
* // with additional text value
* // - example of HTML returned:
* // <ul class="bb-tooltip">
* // <li class="bb-tooltip-name-data1"><span>250</span><br>comment1<span style="color:#00c73c">data1</span>text1</li>
* // <li class="bb-tooltip-name-data2"><span>50</span><br>comment2<span style="color:#fa7171">data2</span>text2</li>
* // </ul>
* contents: {
* bindto: "#tooltip",
* text: {
* // a) 'key' name is used as substitution within template as '{=KEY}'
* // b) the length should match with the data length
* VAR1: ["text1", "text2"],
* VAR2: ["comment1", "comment2"],
* },
* template: '<ul class={=CLASS_TOOLTIP}>{{' +
* '<li class="{=CLASS_TOOLTIP_NAME}"><span>{=VALUE}</span>{=VAR2}<br>' +
* '<span style=color:{=COLOR}>{=NAME}</span>{=VAR1}</li>' +
* '}}</ul>'
* }
*
* // sort tooltip data value display in ascending order
* order: "asc",
*
* // specifying sort function
* order: function(a, b) {
* // param data passed format
* {x: 5, value: 250, id: "data1", index: 5, name: "data1"}
* ...
* },
*
* // show at the initialization
* init: {
* show: true,
* x: 2, // x Axis index (or index for Arc(donut, gauge, pie) types)
* position: {
* top: "150px", // specify as number or as string with 'px' unit string
* left: 250 // specify as number or as string with 'px' unit string
* }
* },
*
* // fires prior tooltip is shown
* onshow: function(selectedData) {
* // current dataset selected
* // ==> [{x: 4, value: 150, id: "data2", index: 4, name: "data2"}, ...]
* selectedData;
* },
*
* // fires prior tooltip is hidden
* onhide: function(selectedData) {
* // current dataset selected
* // ==> [{x: 4, value: 150, id: "data2", index: 4, name: "data2"}, ...]
* selectedData;
* },
*
* // fires after tooltip is shown
* onshown: function(selectedData) {
* // current dataset selected
* // ==> [{x: 4, value: 150, id: "data2", index: 4, name: "data2"}, ...]
* selectedData;
* },
*
* // fires after tooltip is hidden
* onhidden: function(selectedData) {
* // current dataset selected
* // ==> [{x: 4, value: 150, id: "data2", index: 4, name: "data2"}, ...]
* selectedData;
* },
*
* // Link any tooltips when multiple charts are on the screen where same x coordinates are available
* // Useful for timeseries correlation
* linked: true,
*
* // Specify name to interact those with the same name only.
* linked: {
* name: "some-group"
* }
* }
*/
tooltip_show: true,
tooltip_doNotHide: false,
tooltip_grouped: true,
tooltip_format_title: <(() => string)|undefined> undefined,
tooltip_format_name: <(() => string)|undefined> undefined,
tooltip_format_value: <(() => number)|undefined> undefined,
tooltip_position: <(() => {top: number; left: number;})|undefined> undefined,
tooltip_contents: <
(() => string)|{bindto: string; template: string; text?: {[key: string]: string[]}}
> {},
tooltip_init_show: false,
tooltip_init_x: 0,
tooltip_init_position: undefined,
tooltip_linked: false,
tooltip_linked_name: "",
tooltip_onshow: () => {},
tooltip_onhide: () => {},
tooltip_onshown: () => {},
tooltip_onhidden: () => {},
tooltip_order: <string|Function|null> null
};