<script lang="ts">
  /** @type {{ id: string; label: string }[]} */
  let {
    tabs = [],
    selectedId = $bindable(''),
    labelledBy = '',
  } = $props();

  $effect(() => {
    if (tabs.length && !selectedId) selectedId = tabs[0].id;
  });

  function selectTab(id: string) {
    selectedId = id;
  }

  function handleKeydown(e: KeyboardEvent) {
    const idx = tabs.findIndex((t) => t.id === selectedId);
    if (e.key === 'ArrowRight' && idx < tabs.length - 1) {
      e.preventDefault();
      selectedId = tabs[idx + 1].id;
    } else if (e.key === 'ArrowLeft' && idx > 0) {
      e.preventDefault();
      selectedId = tabs[idx - 1].id;
    }
  }
</script>

<div
  role="tablist"
  aria-label={labelledBy || 'Tabs'}
  class="flex h-12 border-b border-stein-200"
  tabindex="0"
  onkeydown={handleKeydown}
>
  {#each tabs as tab}
    <button
      type="button"
      role="tab"
      aria-selected={selectedId === tab.id}
      aria-controls="panel-{tab.id}"
      id="tab-{tab.id}"
      class="border-b-2 px-4 text-sm font-medium transition-colors {selectedId === tab.id
        ? 'border-wald-500 text-wald-600 font-semibold'
        : 'border-transparent text-stein-500 hover:text-stein-700'}"
      tabindex={selectedId === tab.id ? 0 : -1}
      onclick={() => selectTab(tab.id)}
    >
      {tab.label}
    </button>
  {/each}
</div>
