package com.icegps.geotools

import com.icegps.geotools.ktx.toMapboxPoint
import com.icegps.triangulation.Triangle
import com.mapbox.geojson.Feature
import com.mapbox.geojson.FeatureCollection
import com.mapbox.geojson.LineString
import com.mapbox.maps.MapView
import com.mapbox.maps.extension.style.layers.addLayer
import com.mapbox.maps.extension.style.layers.generated.lineLayer
import com.mapbox.maps.extension.style.layers.properties.generated.LineJoin
import com.mapbox.maps.extension.style.sources.addSource
import com.mapbox.maps.extension.style.sources.generated.geoJsonSource

/**
 * @author tabidachinokaze
 * @date 2025/11/28
 */
fun MapView.displayTriangle(
    triangles: List<Triangle>,
    sourceId: String,
    layerId: String
) {
    val features = triangles.map {
        listOf(it.x1, it.x2, it.x3)
    }.map {
        fromPoints(points = it, closed = true)
    }.map {
        it.map { line ->
            val lineA = line.a.toMapboxPoint()
            val lineB = line.b.toMapboxPoint()
            LineString.fromLngLats(listOf(lineA, lineB))
        }.map {
            Feature.fromGeometry(it)
        }
    }.flatten()
    mapboxMap.getStyle { style ->
        style.removeStyleLayer(layerId)
        style.removeStyleSource(sourceId)
        val source = geoJsonSource(sourceId) {
            featureCollection(FeatureCollection.fromFeatures(features))
        }
        style.addSource(source)

        val layer = lineLayer(layerId, sourceId) {
            lineWidth(1.5)
            lineJoin(LineJoin.ROUND)
            lineOpacity(1.0)
            lineColor("#ff0000")
        }

        style.addLayer(layer)
    }
}