/* -------------------------- */		
/*     linksPlugin         */		
/* -------------------------- */	
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
  typeof define === 'function' && define.amd ? define(['exports'], factory) :
  (factory((global.linksPlugin = global.linksPlugin || {})));
}(this, function (exports) { 'use strict';



var linksPlugin = function linksPlugin(__mapper = {}) {
	let link = {}
		
	link.quad = quadPlugin.quadPlugin()										// quadtree for multifind 
			.x(function(d) {return d.x})
			.y(function(d) {return d.y})
			
	link.diagonalv = (d, v) => link.quad.diagonal(d, v = 1.001)		// cords vibration

	link.items = []

	link.width = 1
	link.fill = "transparent"
	link.stroke = "yellow"
	
	link.srcs = ["solars"]			// solars src of links
	
	
	// ----------------------------------- linksPlugin
	var linksPlugin = function linksPlugin() {}

	linksPlugin.items = function items(_) {
		if (arguments.length > 1) link.items =_
		return link.items
	}
	
	linksPlugin.linkIdFn = (s, t) => s.idx + ':' + t.idx
	
	linksPlugin.fill = function items(_) {
		if (arguments.length > 1) link.fill =_
		return link.fill
	}
		
	// -------------- links render
	linksPlugin.render = function render(_) {
	
		var srcs = link.srcs.reduce((p,c) => p.concat(__mapper(c).items()),[])	// get srcs
		var linkItems = srcs.reduce((p, c, i, a) => p.concat(c.links), []) // get links in srcs

		var linksIds = (d, i) => __mapper("links").linkIdFn(d.source, d.target)
		var linksLayer = __mapper("svg")({cls: 'links', item: 'path.linkPath', data: linkItems, idfn: linksIds})
		var diagonalv = (d, v) => link.diagonalv(d, v = 0.001)		// cords vibration
		
		linksLayer.m
				.attr("d", diagonalv)
				.style("fill", link.fill)
				.style("stroke", link.stroke)
				.style("stroke-width", "1px")
		linksLayer.x
				.remove()
	}
	return linksPlugin

}

exports.linksPlugin = linksPlugin

}));