frontend-1

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document.addEventListener("DOMContentLoaded", () => {
  const taskForm = document.getElementById("task-form");
  const taskList = document.querySelector("#task-list ul");
  const priorityFilter = document.getElementById("priority-filter");
  const taskSummary = document.getElementById("task-summary");

  const toggleErrorMessage = (field, condition, message) => {
    const errorMessage = field.nextElementSibling; // Mensagem de erro associada ao campo
    if (!condition) {
      errorMessage.textContent = message;
      errorMessage.classList.add("visible");
      field.classList.add("error");
    } else {
      errorMessage.textContent = "";
      errorMessage.classList.remove("visible");
      field.classList.remove("error");
    }
  };

  const validateTitle = (field) => {
    toggleErrorMessage(field, field.value.trim() !== "", "O título é obrigatório.");
  };

  const validateDescription = (field) => {
    toggleErrorMessage(field, field.value.trim() !== "", "A descrição é obrigatória.");
  };

  const validateDeadline = (field) => {
    const deadlineDate = new Date(field.value);
    const today = new Date();
    toggleErrorMessage(
      field,
      field.value !== "" && deadlineDate > today,
      "O prazo deve ser uma data válida no futuro."
    );
  };

  const validatePriority = (field) => {
    toggleErrorMessage(field, field.value !== "", "Por favor, selecione uma prioridade.");
  };

  const validateForm = () => {
    const title = document.getElementById("task-title");
    const description = document.getElementById("task-desc");
    const deadline = document.getElementById("task-deadline");
    const priority = document.getElementById("task-priority");

    validateTitle(title);
    validateDescription(description);
    validateDeadline(deadline);
    validatePriority(priority);

    const errors = taskForm.querySelectorAll(".error-message.visible");

    return errors.length === 0;
  };

  // Tasks stuff
  // TODO: Move this shit into somewhere else?

  const loadTasks = () => {
    const tasks = JSON.parse(localStorage.getItem("tasks")) || [];

    renderTasks(tasks);
    updateTaskSummary(tasks);
  };

  const saveTasks = (tasks) => {
    localStorage.setItem("tasks", JSON.stringify(tasks));

    updateTaskSummary(tasks);
  };

  const updateTaskSummary = (tasks) => {
    const summary = tasks.reduce((acc, task) => {
      acc[task.priority] = (acc[task.priority] || 0) + 1;

      return acc;
    }, {});

    taskSummary.innerHTML = `
      <p>Prioridade Alta: ${summary["alta"] || 0}</p>
      <p>Prioridade Média: ${summary["media"] || 0}</p>
      <p>Prioridade Baixa: ${summary["baixa"] || 0}</p>
    `;
  };

  const renderTasks = (tasks) => {
    taskList.innerHTML = "";

    tasks.map((task) => {
      const taskItem = document.createElement("li");
      taskItem.innerHTML = `
        <strong>${task.title}</strong>
        <p>${task.description}</p>
        <p>Prazo: ${task.deadline}</p>
        <p>Prioridade: ${task.priority}</p>
        <button class="remove-task">Remover</button>
      `;
      taskList.appendChild(taskItem);
    });
  };

  const addTask = (task) => {
    const tasks = JSON.parse(localStorage.getItem("tasks")) || [];
    tasks.push(task);

    saveTasks(tasks);
    renderTasks(tasks);
  };

  const removeTask = (index) => {
    const tasks = JSON.parse(localStorage.getItem("tasks")) || [];
    tasks.splice(index, 1);

    saveTasks(tasks);
    renderTasks(tasks);
    updateTaskSummary(tasks);
  };

  const filterTasksByPriority = (priority) => {
    const tasks = JSON.parse(localStorage.getItem("tasks")) || [];
    const filteredTasks = priority === "Todas" ? tasks : tasks.filter((task) => task.priority === priority);

    renderTasks(filteredTasks);
  };

  taskForm.addEventListener("submit", (e) => {
    e.preventDefault();

    if (validateForm()) {
      const task = {
        title: document.getElementById("task-title").value.trim(),
        description: document.getElementById("task-desc").value.trim(),
        deadline: document.getElementById("task-deadline").value,
        priority: document.getElementById("task-priority").value,
      };

      addTask(task);
      taskForm.reset();
    }
  });

  taskList.addEventListener("click", (e) => {
    if (e.target.classList.contains("remove-task")) {
      const index = Array.from(taskList.children).indexOf(e.target.parentElement);
      removeTask(index);
    }
  });

  priorityFilter.addEventListener("change", (e) => {
    filterTasksByPriority(e.target.value);
  });

  const resetForm = () => {
    taskForm.reset();
  };

  taskForm.addEventListener("input", (e) => {
    const field = e.target;

    switch (field.id) {
      case "task-title":
        validateTitle(field);
        break;
      case "task-desc":
        validateDescription(field);
        break;
      case "task-deadline":
        validateDeadline(field);
        break;
      case "task-priority":
        validatePriority(field);
        break;
    }
  });

  loadTasks();
});