import ConcaveHull
import SwiftUI

struct MapGroups: View {

  let mapSize: CGSize
  let vertexSize: CGSize
  let groups: [[Vertex]]

  var body: some View {
    ForEach(Array(groups.enumerated()), id: \.element) { index, group in
      MapGroup(mapSize: mapSize, vertexSize: vertexSize, group: group, color: color(index))
    }
  }

  private func color(_ index: Int) -> Color {
    return .map.groupColors[index % Color.map.groupColors.count]
  }
}

#Preview {
  MapGroups(
    mapSize: CGSize(width: 400.0, height: 400.0), vertexSize: CGSize(width: 25.0, height: 25.0),
    groups: [
      [
        Vertex(id: 0, label: "A Circle", position: CGPoint(x: 50.0, y: 50.0)),
        Vertex(id: 1, label: "A Square", position: CGPoint(x: 10.0, y: 20.0), shape: .square),
        Vertex(id: 2, label: "A triangle", position: CGPoint(x: 25, y: 32.0), shape: .triangle),
        Vertex(id: 3, label: "An X", position: CGPoint(x: 70.0, y: 70.0), shape: .x),
      ]
    ])
}