/**
 * Wallonie#Demain Prototype
 *
 * Requires jQuery
 **/

// We don't have working GeoJSON support yet
USE_GEOJSON = false

VERSION = '0.0.1'

// Subset of Dewey Maps' Deck
// See https://lite.framacalc.org/XNQBPjpQuO
const Categories = [
    {"id":6, "name":"1. S'alimenter", "subcategories":[
	{"name":"Marchés", "id":170},
	{"name":"Ateliers cuisine", "id":180},
	{"name":"Spots 'plantes aromatiques'", "id":155},
	{"name":"Épiceries solidaires", "id":135},
	{"name":"Eau potable", "id":115},
	{"name":"Repas gratuits", "id":154},
	{"name":"Restaurants sociaux", "id":118},
	{"name":"Initiatives de récup' alimentaire", "id":28},
	{"name":"GASAP (groupes d'achat)", "id":27},
	{"name":"GASAP (producteurs)", "id":185}
    ], "color":"#FFEB00"},
    
    {"id":11, "name":"2. Se laver, s'habiller", "subcategories":[
	{"name":"Boîtes à dons", "id":210},
	{"name":"Vestiaires sociaux", "id":156},
	{"name":"Donneries, marchés gratuits", "id":46},
	{"name":"Douches publiques", "id":144},
	{"name":"Friperies, vêtements de 2ème main", "id":104}
    ], "color":"#7CFB80"},
    
    {"id":10, "name":"3. Guérir, se soigner", "subcategories":[
	{"name":"Maisons médicales", "id":18},
	{"name":"Réseaux de santé", "id":145},
	{"name":"Services de santé pour personnes précaires", "id":157}
    ], "color":"#02ACCC"},

    {"id":15, "name":"4. Recycler, réparer", "subcategories":[
	{"name":"Ateliers de travail du bois", "id":138},
	{"name":"Récup' de cartouches d'imprimantes", "id":136},
	{"name":"Boîtes à livres", "id":50},
	{"name":"Aide au compostage", "id":132},
	{"name":"Repair cafés", "id":42},
	{"name":"Récup' de matériaux de construction", "id":113},
	{"name":"Bulles à vêtements", "id":206},
	{"name":"Matériaux informatiques recyclés", "id":47},
	{"name":"Recyclage de verre", "id":205},
	{"name":"Marchés aux puces", "id":120}
    ], "color":"#97C000"},

    {"id":7, "name":"5. respirer, se mettre au vert", "subcategories":[
	{"name":"Soutien aux potagistes", "id":128},
	{"name":"Composts collectifs ou 'de quartier'", "id":121},
	{"name":"Potagers & vergers", "id":116},
	{"name":"Réserves naturelles", "id":133},
	{"name":"Associations de naturalistes", "id":194},
	{"name":"Parcs publics", "id":129},
	{"name":"Grainothèques, bourses aux semences", "id":125},
	{"name":"Associations apicoles", "id":127}
    ], "color":"#7E8A0E"},

    {"id":3, "name":"6. Se rencontrer, s'entraider", "subcategories":[
	{"name":"Comités de quartiers", "id":102},
	{"name":"Associations de soutien aux seniors", "id":19},
	{"name":"Maisons de Jeunes", "id":17},
	{"name":"Soutien à l'enfance et à la famille", "id":14},
	{"name":"Maisons de quartiers", "id":10},
	{"name":"Monnaies complémentaires", "id":211},
	{"name":"Associations de soutien scolaire", "id":119},
	{"name":"Associations de Femmes", "id":15},
	{"name":"Accueil des réfugiés", "id":188},
	{"name":"Soutien aux personnes en situation d'handicap", "id":16},
	{"name":"Accueil des primo-arrivants", "id":197},
	{"name":"Coopération et solidarité internationale", "id":209},
	{"name":"Associations pour l'égalité des genres", "id":202},
	{"name":"Centres communautaires NL", "id":204},
	{"name":"Initiatives de récup' alimentaire", "id":201},
	{"name":"Soutien aux personnes précaires", "id":193},	
	{"name":"Systèmes d'échange locaux (SEL)", "id":184}
    ], "color":"#677362"},

    {"id":2, "name":"7. Apprendre, se former", "subcategories":[
	{"name":"Association d'écologie urbaine", "id":90},
	{"name":"Espaces de travail partagés, co-working", "id":87},
	{"name":"Soutien à l'économie locale", "id":12},
	{"name":"Associations d'éducation permanente", "id":13}
    ], "color":"#008080"},

    {"id":13, "name":"8. S'exprimer, communiquer", "subcategories":[
	{"name":"Bornes d'accès à Internet", "id":124},
	{"name":"Hackerspaces", "id":43},
	{"name":"Médias indépendants", "id":109},
	{"name":"Écrivains publics", "id":177},
	{"name":"Lieux de promotion du logiciel libre", "id":174}
    ], "color":"#0E408A"},

    {"id":9, "name":"9. Bouger, se déplacer", "subcategories":[
	{"name":"Cours de vélo", "id":179},
	{"name":"Ateliers vélo", "id":71},
	{"name":"Vélos partagés", "id":147},
	{"name":"Livraisons à vélo", "id":140},
	{"name":"Pompes à vélos", "id":212},
	{"name":"Taxis collectifs (Collecto)", "id":196},
	{"name":"Voitures partagées", "id":141}
    ], "color":"#0E0140"}
]

// Our map
const map = L.map('map')
const mcg = L.markerClusterGroup({
    disableClusteringAtZoom: 18,
    spiderfyOnMaxZoom: false,
    showCoverageOnHover: false,
    zoomToBoundsOnClick: true,
    removeOutsideVisibleBounds: true
})

// GeoJSON cache of markers by section
const Markers = []
const SectionLayers = []
// Prepare Markers for lazy-loading
Categories.forEach(function(c) {
    c.subcategories.forEach(function(s) {
	Markers[s.id] = {}
	if (USE_GEOJSON === true) {
	    SectionLayers[s.id] = L.geoJSON([], {
		filter: function(feature, layer) {
		    console.log('layer filter for ' + s.id)
		    return feature.properties.subcategories[0].id == s.id
		},
		onEachFeature: function(feature, layer) {
		    if (feature.properties && feature.properties.popup) {
			console.log(feature.properties.popup)
			layer.bindPopup(feature.properties.popup)
		    }
		}
	    })
	} else {
	    SectionLayers[s.id] = L.featureGroup.subGroup(mcg, [])
	}
    })
})

// Where do we get our JSON data from
const api_base = 'http://localhost/data/'
//const api_base = 'https://map.incommon.cc/data/'
//const api_base = 'http://maps.dewey.be/api'
const cat_uri = api_base + '/categories.json'

/**
 * Setup the navigation to filter markers on map by category and
 * section. It creates an unordered list of categories to toggle
 * section display.
**/
function navSetup() {
    var nav = $('body > aside > nav')
    var ul  = $('<ul>')
    Categories.forEach(function(c, i) {
	var li = $('<li>')
	var h3 = $('<h3>')
	h3.html(c.name)
	li.append(h3)
	    .attr('id', 'c-' + c.id)
	    .click(function(e) {
		if ($(this).hasClass('active')) {
		    hideCategoryMarkers(c.id)
		} else {
		    showActiveCategoryMarkers(c.id)
		}
		$(this).toggleClass('active')
	    })
	    .append(listSections(c.subcategories))
	ul.append(li)
    })
    nav.append(ul)
}

function listSections(sections) {
    var ul = $('<ul>')
    sections.forEach(function(s, i) {
	var li = $('<li>')
	li.attr('id', 's-' + s.id)
	li.html(s.name)
	li.mouseover(function(e) {
//	    console.log('mouseover: fetching markers')
	    var sec_id = $(this).attr('id').substr(2)
	    fetchMarkers(sec_id)
	}).click(function(e) {
	    var sec_id = $(this).attr('id').substr(2)
	    $(this).toggleClass('active')
	    toggleMarkers(sec_id)
	    return false
	})
	ul.append(li)
    })
    return ul
}

// 
function toggleMarkers(sec_id) {
    var section = $('#s-' + sec_id)
    if (section.hasClass('on-map')) {
//	console.log('remove markers for section ' + sec_id)
	sectionOffMap(sec_id)
    } else {
//	console.log('showing markers for section ' + sec_id)
	sectionOnMap(sec_id)
    }
}

/**
 * Retrieve markers for given section from the JSON API
 *
 * @param String sec_id HTML attribute id for the wanted section
 *
 * @return Boolean true if remote JSON, false if available locally
**/
function fetchMarkers(sec_id) {
    if ($.isEmptyObject(Markers[sec_id])) {
	var uri = api_base + 'markers-' + sec_id + '.json'
	$.getJSON(uri, function(data) {
	    console.log('loaded JSON from ' + uri)
	}).fail(function() {
	    console.log('failed to get JSON from ' + uri)
	}).done(function(data) {
	    // Must be in .done() otherwise data is lost
	    Markers[sec_id] = toGeoJSON(data)
	})
	return true
    }
    return false
}

/**
 * Grossly convert incoming JSON objects to GeoJSON
 *
 * @param Array of JSON objects with lat and lon coordinates
 * @return Array of GeoJSON features
**/
function toGeoJSON(data) {
    if (USE_GEOJSON === false) {
	return data
    }
    var myFeatures = $.map(data, function(o, i) {
	return {
	    "type": "feature",
	    "properties": o,
	    "geometry": {
		"type": "Point",
		"coordinates": [o.lat, o.lon]
	    }
	}
    })
    return {
	"type": "FeatureCollection",
	"features": myFeatures
    }
}

/**
 * Hide markers in all sections for given category
 *
 * @param Integer cat_id The Category ID
 *
 * @return Boolean true if any markers were hidden
 **/
function hideCategoryMarkers(cat_id) {
//    console.log('hideCategoryMarkers(' + cat_id + ')')
    Categories.forEach(function(c) {
	if (c.id == cat_id) {
	    c.subcategories.forEach(function(s) {
		sectionOffMap(s.id)
	    })
	    return true
	}
    })
    return false
}

/**
 * Show markers for all active sections in given category
 **/
function showActiveCategoryMarkers(cat_id) {
//    console.log('showActiveCategoryMarkers(' + cat_id + ')')
    Categories.forEach(function(c) {
	if (c.id == cat_id) {
	    console.log(cat_id)
	    c.subcategories.forEach(function(s) {
		var section = $('#s-' + s.id)
		if (section.hasClass('active')) {
//		    console.log('  - showing active section ' + s.id)
		    sectionOnMap(s.id)
		}
	    })
	    return true
	}
    })
    return false
}

/**
 * Display section markers on map
 **/
function sectionOnMap(sec_id) {
//  console.log('sectionOnMap(' + sec_id + ')')
    var section = $('#s-' + sec_id)
    if (USE_GEOJSON === true) {
	SectionLayers[sec_id].addData(Markers[sec_id]).addTo(map)
    } else {
	var markers = []
	Markers[sec_id].forEach(function(m) {
	    var layer = markerFor(m)
	    markers.push(layer)
	})
    }
    SectionLayers[sec_id] = L.featureGroup.subGroup(mcg, markers)
//    mcg.addTo(map)
    SectionLayers[sec_id].addTo(map)
    section.addClass('on-map')
}

/**
 * Hide section markers from map
 **/
function sectionOffMap(sec_id) {
//    console.log('sectionOffMap(' + sec_id + ')')
    var section = $('#s-' + sec_id)
    if (section.hasClass('on-map')) {
//	console.log('sectionOffMap(' + sec_id + ')')
	map.removeLayer(SectionLayers[sec_id])
	section.removeClass('on-map')
    }
}

// Careful with icons and MarkerCluster
// Use iconCreateFunction for styling
// https://github.com/Leaflet/Leaflet.markercluster/blob/master/example/marker-clustering-custom.html
// https://github.com/Leaflet/Leaflet/issues/534
function markerFor(data) {
    var icon = iconFor(data)
    var marker = L.marker([data.lat, data.lon], {
	title: data.name,
	alt: data.type + ' marker ' + data.id,
	
    })
    // Override pre-made popup data
    data.popup = markerPopupFor(data)
    marker.bindPopup(data.popup)
    return marker
}

const asset_uri = $('script[src$="mapper.js"]' ).attr( 'src' ).replace( 'mapper.js', '' )

function iconFor(data) {

    var cat_id = $('#s-' + data.subcategories[0].id).parents('li').attr('id').substr(2)
    var color = Categories.find(function(el){ return el.id == cat_id }).color
//    console.log(asset_uri + 'img/')

    var icon = new L.Icon({
	iconUrl: asset_uri + 'img/marker-' + cat_id + '.png',
	iconAnchor: new L.Point(16, 16),	
    })
}

function markerPopupFor(data) {
    var template = $('#popup-template').html()
    try {
	var cat_id = $('#s-' + data.subcategories[0].id).parents('li').attr('id')
    } catch(e) {
	var cat_id = 'c-0'
    }
    return Mustache.render(template, {
	marker: data,
	cat_id: cat_id
    })
}

function selected_sections() {
    var s = [];
    $('.on-map').each(function() {
	s.push($(this).attr('id').split('s-')[1]);
    });
    return s;
}

function current_state() {
    var c = map.getCenter();
    var z = map.getZoom();
    var s = selected_sections();

    console.log('current_state: ' + [ c.lat, c.lng, z, s ]);
	
    return [ c.lat, c.lng, z, s ];
}


/*
function show_markers(sec_id) {
    // Create corresponding layer
    console.log(section_markers[sec_id])
    section_layers[sec_id] = L.geoJSON(section_markers[sec_id], {
	filter: function(feature, layer) {
	    return feature.properties.subcategories[0].id == sec_id
	},
	onEachFeature: function(feature, layer) {
	    if (feature.properties && feature.properties.popup) {
		console.log(feature.properties.popup)
		layer.bindPopup(feature.properties.popup)
	    }
	}
    }).addTo(map)
}
*/

function locate () {
    map.locate({ setView: true, maxZoom: 13 })
    map.on('locationfound', onLocationFound)
}
function unlocate () {
    map.locate({ setView: false, maxZoom: 0 })
    map.off('locationfound')
}
function onLocationFound (e) {
    var radius = e.accuracy / 2

    if (radius > 1000) {
	// We must be on a desktop
	$('#b-locate').remove()
	return false
    }

    L.marker(e.latlng).addTo(map)
	.bindPopup("Vous vous trouvez dans les " + radius + " mètres autour de ce point.").openPopup()
    L.circle(e.latlng, radius).addTo(map)
}


$(document).ready(function() {

    map.setView([50.83906, 4.35308], 8)

    L.tileLayer('//stamen-tiles-{s}.a.ssl.fastly.net/toner/{z}/{x}/{y}.png', {
	attribution: 'Map data &copy; <a href="http://openstreetmap.org">OpenStreetMap</a> contributors, <a href="http://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>, Imagery © <a href="http://mapbox.com">Mapbox</a>',
	maxZoom: 18,
	id: 'c4ptaincrunch.ka5engdh',
	accessToken: 'pk.eyJ1IjoiYzRwdGFpbmNydW5jaCIsImEiOiJUdWVRSENNIn0.qssi5TBLeBinBsXkZKiI6Q'
    }).addTo(map)

    //    L.control.layers(SectionLayers).addTo(map)

    mcg.addTo(map)
    
    navSetup()

    var btnLocate = $('<button>')
    btnLocate
	.attr('id', 'b-locate')
	.html('Où suis-je ?')
	.on('click', locate)
//    $('body>header').append(btnLocate)

    var btnToggle = $('<button>')
    btnToggle
	.attr('id', 'b-toggle')
	.addClass('icon-menu-on')
	.click(function() {
	    var aside = $('body > aside')
	    if (aside.css('display') != 'none') {
		btnToggle
		    .removeClass('icon-menu-on').addClass('icon-menu-off')
		aside.css('display', 'none')
		$('#map .leaflet-top.leaflet-left').css('left', 0)
	    } else {	
		btnToggle
		    .removeClass('icon-menu-off').addClass('icon-menu-on')
		$('#map .leaflet-top.leaflet-left').css('left', '20rem')
		aside.css('display', 'block')
	    }
	})
    $('body>header').append(btnToggle)

})