Add TODOs

domain/src/main/kotlin/ch/dissem/yaep/domain/generator.kt

@@ -24,6 +24,7 @@ fun generateGame(size: Int = 6): Game {
     // If i >= n, we are done. The set of clues is minimal.
     while (i < clues.size) {
         // Run your solver on the reduced set of clues and count the number of possible solutions.
+        // TODO: first do binary search
         val temp = clues - clues[i]
         if (solve(grid.toGrid(), temp) == SOLVABLE) {
             // If there is exactly one solution, update clues and reset index.
@@ -63,6 +64,7 @@ internal fun solve(
         } catch (e: UnsolvablePuzzleException) {
             return NO_SOLUTION
         }
+        // TODO clean up groups in rows (?)
         grid.forEach { row -> row.forEach { cell -> row.cleanupOptions(cell) } }
 //        grid.forEach { row ->
 //            removedOptions = row.tryOptionsForClues(grid, otherClues) || removedOptions
@@ -88,46 +90,12 @@ internal fun solve(
     return MULTIPLE_SOLUTIONS
 }
 
-internal fun <C : ItemClass<C>> GameCell<C>.countSolutions(
-    grid: Grid,
-    clues: Collection<Clue>
-): Int {
-    val options = options.toList()
-    var solvableCount = 0
-    for (option in options) {
-        selection = option
-        if (solve(grid, clues) == SOLVABLE) {
-            solvableCount++
-        }
-    }
-    selection = null
-    this.options.addAll(options)
-
-    return solvableCount
-}
-
 internal enum class PuzzleSolution {
     NO_SOLUTION,
     SOLVABLE,
     MULTIPLE_SOLUTIONS
 }
 
-fun <C : ItemClass<C>> GameRow<C>.tryOptionsForClues(grid: Grid, clues: List<Clue>): Boolean {
-    var removedOptions = false
-    filter { cell -> cell.selection == null }.forEach { cell ->
-        val removed = cell.options.removeIf { option ->
-            cell.selection = option
-            clues.any { it.isRuleViolated(grid) }
-        }
-        cell.selection = null
-        if (removed) {
-            cleanupOptions(cell)
-        }
-        removedOptions = removedOptions || removed
-    }
-    return removedOptions
-}
-
 fun <C : ItemClass<C>> GameRow<C>.cleanupOptions(cell: GameCell<C>) {
     if (cell.options.size == 1 && cell.selection == null) {
         cell.selection = cell.options.first()