import Foundation

struct BlockerParserStrategy: MapParserStrategy {
  private let regex = MapParsingPatterns.blocker

  func canHandle(line: String) -> Bool {
    let range = NSRange(location: 0, length: line.utf16.count)
    let matches = regex.matches(in: String(line), options: [], range: range)
    return matches.count > 0 && matches[0].numberOfRanges == 3
  }

  func handle(index: Int, line: String, vertices: [String: Vertex]) -> (Any.Type, Any) {
    let range = NSRange(location: 0, length: line.utf16.count)
    let matches = regex.matches(in: String(line), options: [], range: range)

    let match = matches[0]
    let vertexA = String(line[Range(match.range(at: 2), in: line)!])

    if let vertex = vertices[vertexA] {
      let blocker = Blocker(id: index, position: vertex.position)
      return (Blocker.self, blocker)
    }

    return (NSObject.self, NSObject())  // No matching object
  }
}