package com.guinetik.hexafun.examples.tasks;
   
   import com.guinetik.hexafun.fun.Result;
   
   import static com.guinetik.hexafun.examples.tasks.TaskInputs.*;
   
   /**
    * Validation functions for task inputs.
    */
  public class TaskValidators {
  
      // --- CreateTask validators ---
  
      public static Result<CreateTask> validateCreateTitle(CreateTask input) {
          if (input.title() == null || input.title().isBlank()) {
              return Result.fail("Title cannot be empty");
          }
          return Result.ok(input);
      }
  
      public static Result<CreateTask> validateCreateTitleLength(CreateTask input) {
          if (input.title().length() > 100) {
              return Result.fail("Title cannot exceed 100 characters");
          }
          return Result.ok(input);
      }
  
      // --- StartTask validators ---
  
      public static Result<StartTask> validateStartTaskId(StartTask input) {
          if (input.taskId() == null || input.taskId().isBlank()) {
              return Result.fail("Task ID cannot be empty");
          }
          return Result.ok(input);
      }
  
      // --- CompleteTask validators ---
  
      public static Result<CompleteTask> validateCompleteTaskId(CompleteTask input) {
          if (input.taskId() == null || input.taskId().isBlank()) {
              return Result.fail("Task ID cannot be empty");
          }
          return Result.ok(input);
      }
  
      // --- UpdateTask validators ---
  
      public static Result<UpdateTask> validateUpdateTaskId(UpdateTask input) {
          if (input.taskId() == null || input.taskId().isBlank()) {
              return Result.fail("Task ID cannot be empty");
          }
          return Result.ok(input);
      }
  
      public static Result<UpdateTask> validateUpdateTitle(UpdateTask input) {
          if (input.title() == null || input.title().isBlank()) {
              return Result.fail("Title cannot be empty");
          }
          return Result.ok(input);
      }
  
      // --- DeleteTask validators ---
  
      public static Result<DeleteTask> validateDeleteTaskId(DeleteTask input) {
          if (input.taskId() == null || input.taskId().isBlank()) {
              return Result.fail("Task ID cannot be empty");
          }
          return Result.ok(input);
      }
  
      // --- FindTask validators ---
  
      public static Result<FindTask> validateFindTaskId(FindTask input) {
          if (input.taskId() == null || input.taskId().isBlank()) {
              return Result.fail("Task ID cannot be empty");
          }
          return Result.ok(input);
      }
  }