component Navbar {
  props {
    @event toggle = function
    @event open = function
    @event close = function
    @event select = function
    @event action = function
    size = "default"
    color = "primary"
    label = "Primary navigation"
    topbarLabel = "Utility navigation"
    brand = {}
    items = []
    actions = []
    active = ""
    sticky = false
    openOnHover = false
    maxWidth = "full"
    mobileLabel = "Toggle navigation"
    class = ""
  }

  state mobileOpen = false

  functions {
    function toggleNavigation() {
      mobileOpen = !mobileOpen
      $emit("toggle", { open: mobileOpen })
      $emit(mobileOpen ? "open" : "close", { source: "mobile" })
    }

    function selectItem(item, level) {
      mobileOpen = false
      $emit("select", { item: item, value: item.value || "", level: level })
    }

    function selectAction(item) {
      mobileOpen = false
      $emit("action", { item: item, value: item.value || "" })
    }

    function isItemActive(item) {
      if (!item) return false
      if (item.value && item.value === active) return true
      if (!item.children || !item.children.length) return false
      return item.children.some(function (child) {
        return isItemActive(child)
      })
    }

    function toggleDropdown(event, item) {
      $emit(event.currentTarget.open ? "open" : "close", {
        source: "menu",
        item: item
      })
    }
  }

  view {
    <header class="wire-navbar wire-navbar--width-{maxWidth} wire-next--color-{color} wire-next--size-{size} {sticky ? 'wire-navbar--sticky' : ''} {class}" data-wrn-navbar data-open-on-hover="{openOnHover}">
      <div class="wire-navbar__topbar" aria-label="{topbarLabel}">
        <slot name="topbar" />
      </div>

      <div class="wire-navbar__main">
        <a class="wire-navbar__brand" href="{brand.href || '/'}" aria-label="{brand.ariaLabel || brand.label || label}">
          {#if brand.logo}
            <img class="wire-navbar__brand-logo" src="{brand.logo}" alt="{brand.logoAlt || brand.label || ''}" width="{brand.logoWidth || ''}" height="{brand.logoHeight || ''}" />
          {/if}
          {#if brand.icon}
            <span class="wire-navbar__brand-icon {brand.icon}" aria-hidden="true"></span>
          {/if}
          {#if brand.label || brand.description}
            <span class="wire-navbar__brand-copy">
              {#if brand.label}<strong>{brand.label}</strong>{/if}
              {#if brand.description}<small>{brand.description}</small>{/if}
            </span>
          {/if}
        </a>

        <button type="button" class="wire-navbar__toggle" aria-label="{mobileLabel}" aria-expanded="{mobileOpen}" @click="toggleNavigation()">
          <span aria-hidden="true"></span><span aria-hidden="true"></span><span aria-hidden="true"></span>
        </button>

        <div class="wire-navbar__collapse {mobileOpen ? 'is-open' : ''}">
          <nav class="wire-navbar__menus" aria-label="{label}">
            {#each items as item}
              {#if item.children && item.children.length}
                <details class="wire-navbar__dropdown wire-navbar__dropdown--{item.type || 'dropdown'}" name="wire-navbar-menu" @toggle="toggleDropdown($event, item)">
                  <summary aria-current="{isItemActive(item) ? 'page' : ''}">
                    {#if item.icon}<span class="{item.icon}" aria-hidden="true"></span>{/if}
                    <span>{item.label}</span>
                    <span class="wire-navbar__chevron" aria-hidden="true"></span>
                  </summary>
                  <div class="wire-navbar__panel wire-navbar__panel--columns-{item.columns || 1}">
                    {#if item.description}<p class="wire-navbar__panel-intro">{item.description}</p>{/if}
                    {#each item.children as child}
                      <div class="wire-navbar__group">
                        {#if child.children && child.children.length}
                          {#if child.label}<strong class="wire-navbar__group-title">{child.label}</strong>{/if}
                          {#if child.description}<small>{child.description}</small>{/if}
                          {#each child.children as nested}
                            <a href="{nested.href || '#'}" target="{nested.target || ''}" rel="{nested.rel || ''}" aria-current="{nested.value === active ? 'page' : ''}" @click="selectItem(nested, 3)">
                              {#if nested.icon}<span class="{nested.icon}" aria-hidden="true"></span>{/if}
                              <span><strong>{nested.label}</strong>{#if nested.description}<small>{nested.description}</small>{/if}</span>
                            </a>
                          {/each}
                        {:else}
                          <a href="{child.href || '#'}" target="{child.target || ''}" rel="{child.rel || ''}" aria-current="{child.value === active ? 'page' : ''}" @click="selectItem(child, 2)">
                            {#if child.icon}<span class="{child.icon}" aria-hidden="true"></span>{/if}
                            <span><strong>{child.label}</strong>{#if child.description}<small>{child.description}</small>{/if}</span>
                          </a>
                        {/if}
                      </div>
                    {/each}
                  </div>
                </details>
              {:else}
                <a class="wire-navbar__menu-link" href="{item.href || '#'}" target="{item.target || ''}" rel="{item.rel || ''}" aria-current="{item.value === active ? 'page' : ''}" @click="selectItem(item, 1)">
                  {#if item.icon}<span class="{item.icon}" aria-hidden="true"></span>{/if}
                  <span>{item.label}</span>
                </a>
              {/if}
            {/each}
          </nav>

          <div class="wire-navbar__actions">
            {#each actions as item}
              <a class="wire-navbar__action wire-navbar__action--{item.variant || 'link'}" href="{item.href || '#'}" target="{item.target || ''}" rel="{item.rel || ''}" @click="selectAction(item)">
                {#if item.icon}<span class="{item.icon}" aria-hidden="true"></span>{/if}
                <span>{item.label}</span>
              </a>
            {/each}
            <slot name="actions" />
          </div>
        </div>
      </div>
    </header>
  }
}