{% extends "layouts/base.html" %}

{% block title %}
  Add a new project ~ ATR
{% endblock title %}

{% block description %}
  Add a new project based on an existing one.
{% endblock description %}

{% block content %}
  <h1>
    Add a new <strong>{{ project_name.removesuffix(" (Incubating)") }}</strong> sub-project
  </h1>
  <p>New projects can only be derived from existing projects, by adding a suffix.</p>

  <form method="post" class="atr-canary py-4">
    {{ form.hidden_tag() }}

    <div class="mb-3 pb-3 row border-bottom">
      <label for="{{ form.derived_project_name.id }}"
             class="col-sm-3 col-form-label text-sm-end">{{ form.derived_project_name.label.text }}:</label>
      <div class="col-sm-8">
        {{ form.derived_project_name(class_="form-control") }}
        {% if form.derived_project_name.errors -%}
          <span class="text-danger small">{{ form.derived_project_name.errors[0] }}</span>{%- endif %}
          <p class="text-muted mt-1">The desired suffix for the full project name.</p>
          <p id="capitalisation-warning" class="text-danger small mt-1 d-none">
            <i class="bi bi-exclamation-triangle"></i>
            Warning: Ensure all words in the derived name start with a capital for proper display.
          </p>
        </div>
      </div>

      <div class="mb-3 pb-3 row border-bottom">
        <label id="new-project-name-label"
               for="new-project-name-display"
               class="col-sm-3 col-form-label text-sm-end">Project name preview:</label>
        <div class="col-sm-8">
          <code id="new-project-name-display"
                class="form-control-plaintext bg-light p-2 rounded d-block"></code>
          <p class="text-muted small mt-1">This will be the full display name for the derived project.</p>
        </div>
      </div>

      <div class="mb-3 pb-3 row border-bottom">
        <label id="new-project-label-label"
               for="new-project-label-display"
               class="col-sm-3 col-form-label text-sm-end">Project label preview:</label>
        <div class="col-sm-8">
          <code id="new-project-label-display"
                class="form-control-plaintext bg-light p-2 rounded d-block"></code>
          <p class="text-muted small mt-1">This will be the short label used in URLs and identifiers.</p>
        </div>
      </div>

      <div class="row">
        <div class="col-sm-9 offset-sm-3">{{ form.submit(class_="btn btn-primary mt-3") }}</div>
      </div>
    </form>
  {% endblock content %}

  {% block javascripts %}
    {{ super() }}
    <script>
        document.addEventListener("DOMContentLoaded", () => {
            const projectLabel = document.getElementById("{{ form.project_name.id }}");
            const projectSelect = "{{ project_name }}";
            const derivedNameInput = document.getElementById("{{ form.derived_project_name.id }}");
            const newNameDisplay = document.getElementById("new-project-name-display");
            const newLabelDisplay = document.getElementById("new-project-label-display");
            const capitalisationWarning = document.getElementById("capitalisation-warning");

            if (!projectSelect || !derivedNameInput || !newNameDisplay || !newLabelDisplay || !capitalisationWarning) return;

            function generateSlug(text) {
                return text.toLowerCase().replace(/\s+/g, "-").replace(/[^a-z0-9-]/g, "");
            }

            function updatePreview() {
                const selectedOption = projectSelect;
                const baseLabel = projectLabel.value;
                const baseFullName = selectedOption;
                const derivedNameValue = derivedNameInput.value.trim();

                let hasCapitalisationIssue = false;
                if (derivedNameValue) {
                    const words = derivedNameValue.split(/\s+/);
                    for (const word of words) {
                        if (word.length > 0 && !/^[A-Z]/.test(word)) {
                            hasCapitalisationIssue = true;
                            break;
                        }
                    }
                }

                if (hasCapitalisationIssue) {
                    capitalisationWarning.classList.remove("d-none");
                } else {
                    capitalisationWarning.classList.add("d-none");
                }

                let newFullName = baseFullName;
                if (derivedNameValue) {
                    const match = baseFullName.match(/^(.*?)\s*(\(.*\))?$/);
                    let mainPart = baseFullName.trim();
                    let suffixPart = null;

                    if (match) {
                        mainPart = match[1] ? match[1].trim() : mainPart;
                        suffixPart = match[2];
                    }

                    if (suffixPart) {
                        newFullName = `${mainPart} ${derivedNameValue} ${suffixPart}`;
                    } else {
                        newFullName = `${mainPart} ${derivedNameValue}`;
                    }
                    newFullName = newFullName.replace(/\s{2,}/g, " ").trim();
                }
                newNameDisplay.textContent = newFullName || "(Select base project)";

                let newLabel = baseLabel;
                if (derivedNameValue) {
                    const derivedSlug = generateSlug(derivedNameValue);
                    if (derivedSlug) {
                        newLabel = `${baseLabel}-${derivedSlug}`;
                    }
                }
                newLabelDisplay.textContent = newLabel || "(Enter derived project name)";
            }

            derivedNameInput.addEventListener("input", updatePreview);

            updatePreview();
        });
    </script>
  {% endblock javascripts %}