* See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.internal.idn

/** Recipe to build an `IdnaMappingTable`. */
class IdnaMappingTableData(
  val sections: String,
  val ranges: String,
  val mappings: String,

fun main(vararg args: String) {
  val data = loadIdnaMappingTableData()
  val file = generateMappingTableFile(data)
  file.writeTo(File(args[0]))
}

fun loadIdnaMappingTableData(): IdnaMappingTableData {
  val path = "/okhttp3/internal/idna/IdnaMappingTable.txt".toPath()
  val table =
    FileSystem.RESOURCES.read(path) {
      readPlainTextIdnaMappingTable()
    }
  return buildIdnaMappingTableData(table)
}

import kotlin.math.abs
import kotlin.streams.toList
import okio.Buffer

/** Index [table] for compactness as specified by `IdnaMappingTable`. */
fun buildIdnaMappingTableData(table: SimpleIdnaMappingTable): IdnaMappingTableData {
  val simplified = mergeAdjacentRanges(table.mappings)
  val withoutSectionSpans = withoutSectionSpans(simplified)
  val sections = sections(withoutSectionSpans)

  val rangesBuffer = Buffer()