```vue
<template>
  <div class="min-h-screen bg-gray-50 py-10 px-6">
    <div class="max-w-5xl mx-auto bg-white rounded-2xl shadow-lg p-8">
      <h1 class="text-2xl font-bold text-center text-gray-800">
        Form Undangan Pernikahan Basic
      </h1>
      <p class="text-center text-gray-500 text-sm mb-8">
        Isi semua data berikut dengan lengkap dan benar.
      </p>

      <!-- Data Pemesan -->
      <section class="mb-8">
        <h2 class="font-semibold text-blue-600 mb-3 border-b pb-1">📋 Data Pemesan</h2>
        <div class="grid grid-cols-1 md:grid-cols-3 gap-4">
          <input
            v-model="form.nama_pemesan"
            type="text"
            placeholder="Nama Pemesan"
            required
            class="w-full border border-gray-300 rounded-lg px-3 py-2 focus:ring-2 focus:ring-blue-400 focus:border-blue-400 outline-none transition"
          />
          <input
            v-model="form.email"
            type="email"
            placeholder="Email"
            required
            class="w-full border border-gray-300 rounded-lg px-3 py-2 focus:ring-2 focus:ring-blue-400 focus:border-blue-400 outline-none transition"
          />
          <input
            v-model="form.no_tlpn"
            type="text"
            placeholder="No Telepon"
            class="w-full border border-gray-300 rounded-lg px-3 py-2 focus:ring-2 focus:ring-blue-400 focus:border-blue-400 outline-none transition"
          />
        </div>
      </section>

      <!-- Data Mempelai -->
      <section class="mb-8">
        <h2 class="font-semibold text-blue-600 mb-3 border-b pb-1">💍 Data Mempelai</h2>
        <div class="grid grid-cols-1 md:grid-cols-2 gap-6">
          <!-- Mempelai Pria -->
          <div>
            <h3 class="font-medium text-gray-700 mb-2">Mempelai Pria</h3>
            <div class="grid gap-2">
              <input
                v-model="form.form.nama_lengkap_pria"
                placeholder="Nama Lengkap"
                class="w-full border border-gray-300 rounded-lg px-3 py-2 focus:ring-2 focus:ring-blue-400 focus:border-blue-400 outline-none transition"
              />
              <input
                v-model="form.form.nama_bapak_pria"
                placeholder="Nama Bapak"
                class="w-full border border-gray-300 rounded-lg px-3 py-2 focus:ring-2 focus:ring-blue-400 focus:border-blue-400 outline-none transition"
              />
              <input
                v-model="form.form.nama_ibu_pria"
                placeholder="Nama Ibu"
                class="w-full border border-gray-300 rounded-lg px-3 py-2 focus:ring-2 focus:ring-blue-400 focus:border-blue-400 outline-none transition"
              />
            </div>
          </div>

          <!-- Mempelai Wanita -->
          <div>
            <h3 class="font-medium text-gray-700 mb-2">Mempelai Wanita</h3>
            <div class="grid gap-2">
              <input
                v-model="form.form.nama_lengkap_wanita"
                placeholder="Nama Lengkap"
                class="w-full border border-gray-300 rounded-lg px-3 py-2 focus:ring-2 focus:ring-pink-400 focus:border-pink-400 outline-none transition"
              />
              <input
                v-model="form.form.nama_bapak_wanita"
                placeholder="Nama Bapak"
                class="w-full border border-gray-300 rounded-lg px-3 py-2 focus:ring-2 focus:ring-pink-400 focus:border-pink-400 outline-none transition"
              />
              <input
                v-model="form.form.nama_ibu_wanita"
                placeholder="Nama Ibu"
                class="w-full border border-gray-300 rounded-lg px-3 py-2 focus:ring-2 focus:ring-pink-400 focus:border-pink-400 outline-none transition"
              />
            </div>
          </div>
        </div>
      </section>

      <!-- Detail Acara -->
      <section class="mb-8">
        <h2 class="font-semibold text-blue-600 mb-3 border-b pb-1">📅 Detail Acara</h2>
        <div class="grid grid-cols-1 md:grid-cols-2 gap-6">
          <!-- Akad -->
          <div>
            <h3 class="font-medium text-gray-700 mb-2">Akad</h3>
            <div class="grid gap-2">
              <input
                v-model="form.form.hari_tanggal_akad"
                type="date"
                placeholder="Hari & Tanggal Akad"
                class="w-full border border-gray-300 rounded-lg px-3 py-2 focus:ring-2 focus:ring-blue-400 focus:border-blue-400 outline-none transition"
              />
              <input
                v-model="form.form.waktu_akad"
                type="time"
                placeholder="Waktu Akad"
                class="w-full border border-gray-300 rounded-lg px-3 py-2 focus:ring-2 focus:ring-blue-400 focus:border-blue-400 outline-none transition"
              />
              <textarea
                v-model="form.form.alamat_akad"
                rows="3"
                placeholder="Alamat Akad"
                class="w-full border border-gray-300 rounded-lg px-3 py-2 focus:ring-2 focus:ring-blue-400 focus:border-blue-400 outline-none transition resize-none"
              ></textarea>
              <input
                v-model="form.form.link_gmaps_akad"
                type="text"
                placeholder="Link Google Maps Akad"
                class="w-full border border-gray-300 rounded-lg px-3 py-2 focus:ring-2 focus:ring-blue-400 focus:border-blue-400 outline-none transition"
              />
            </div>
          </div>
          <!-- Resepsi -->
          <div>
            <h3 class="font-medium text-gray-700 mb-2">Resepsi</h3>
            <div class="grid gap-2">
              <input
                v-model="form.form.hari_tanggal_resepsi"
                type="date"
                placeholder="Hari & Tanggal Resepsi"
                class="w-full border border-gray-300 rounded-lg px-3 py-2 focus:ring-2 focus:ring-blue-400 focus:border-blue-400 outline-none transition"
              />
              <input
                v-model="form.form.waktu_resepsi"
                type="time"
                placeholder="Waktu Resepsi"
                class="w-full border border-gray-300 rounded-lg px-3 py-2 focus:ring-2 focus:ring-blue-400 focus:border-blue-400 outline-none transition"
              />
              <textarea
                v-model="form.form.alamat_resepsi"
                rows="3"
                placeholder="Alamat Resepsi"
                class="w-full border border-gray-300 rounded-lg px-3 py-2 focus:ring-2 focus:ring-blue-400 focus:border-blue-400 outline-none transition resize-none"
              ></textarea>
              <input
                v-model="form.form.link_gmaps_resepsi"
                type="text"
                placeholder="Link Google Maps Resepsi"
                class="w-full border border-gray-300 rounded-lg px-3 py-2 focus:ring-2 focus:ring-blue-400 focus:border-blue-400 outline-none transition"
              />
            </div>
          </div>
          <!-- Hitung Mundur -->
          <div>
            <h3 class="font-medium text-gray-700 mb-2">Hitung Mundur</h3>
            <input
              v-model="form.form.hitung_mundur"
              type="datetime-local"
              placeholder="Hitung Mundur Waktu Acara"
              class="w-full border border-gray-300 rounded-lg px-3 py-2 focus:ring-2 focus:ring-blue-400 focus:border-blue-400 outline-none transition"
            />
          </div>
        </div>
      </section>

      <!-- Say Something -->
      <section class="mb-8">
        <h2 class="font-semibold text-blue-600 mb-3 border-b pb-1">💬 Say Something</h2>
        <textarea
          v-model="form.form.say_something"
          rows="4"
          placeholder="Kata-kata spesial atau pesan untuk tamu..."
          class="w-full border border-gray-300 rounded-lg px-3 py-2 focus:ring-2 focus:ring-blue-400 focus:border-blue-400 outline-none transition resize-none"
        ></textarea>
      </section>

      <!-- Rekening & Musik -->
      <section class="mb-8">
        <h2 class="font-semibold text-blue-600 mb-3 border-b pb-1">💳 Rekening & Musik</h2>
        <div class="grid md:grid-cols-3 gap-4">
          <input
            v-model="form.form.rekening_1"
            placeholder="Rekening 1"
            class="w-full border border-gray-300 rounded-lg px-3 py-2 focus:ring-2 focus:ring-blue-400 focus:border-blue-400 outline-none transition"
          />
        </div>
        <input
          v-model="form.form.link_music"
          placeholder="Link Music (opsional)"
          class="w-full border border-gray-300 rounded-lg px-3 py-2 mt-4 focus:ring-2 focus:ring-blue-400 focus:border-blue-400 outline-none transition"
        />
      </section>

      <!-- Foto Upload -->
      <section class="mb-8">
        <h2 class="font-semibold text-blue-600 mb-3 border-b pb-1">🖼️ Galeri Foto</h2>
        <div
          class="border-2 border-dashed border-gray-300 rounded-xl p-8 flex flex-col justify-center items-center text-gray-400 hover:border-blue-400 hover:text-blue-500 transition"
        >
          <input
            id="gallery"
            type="file"
            multiple
            accept="image/*"
            class="hidden"
            @change="handleFileChange"
          />
          <label v-if="!previews.length" for="gallery" class="cursor-pointer flex flex-col items-center">
            <span class="text-4xl font-bold">+</span>
            <span class="text-sm mt-2">Pilih Foto (maks. 4, JPEG/PNG, maks. 2MB)</span>
          </label>
          <div v-else class="grid grid-cols-2 sm:grid-cols-4 gap-4">
            <div
              v-for="(src, i) in previews"
              :key="i"
              class="relative group"
            >
              <img
                :src="src"
                class="w-24 h-24 object-cover rounded-lg border shadow"
              />
              <button
                @click="removeFile(i)"
                class="absolute -top-2 -right-2 bg-red-500 text-white rounded-full w-5 h-5 flex items-center justify-center text-xs opacity-0 group-hover:opacity-100 transition"
                title="Hapus foto"
              >
                ✕
              </button>
            </div>
            <label
              v-if="previews.length < 4"
              for="gallery"
              class="cursor-pointer flex flex-col items-center justify-center w-24 h-24 border-2 border-dashed border-gray-300 rounded-lg text-gray-400 hover:border-blue-400 hover:text-blue-500 transition"
            >
              <span class="text-3xl font-bold">+</span>
            </label>
          </div>
        </div>
      </section>

      <!-- Tombol -->
      <div class="text-end mt-6">
        <button
          @click="batal"
          class="bg-gray-600 text-white font-semibold px-6 py-2 rounded-lg transition mr-2"
        >
          Batal
        </button>
        <button
          @click="konfirmasi"
          class="bg-blue-700 text-white font-semibold px-6 py-2 rounded-lg transition"
        >
          Konfirmasi
        </button>
      </div>
    </div>
  </div>
</template>

<script setup>
import { ref } from 'vue'
import { useRouter } from 'vue-router'

const router = useRouter()

const form = ref({
  nama_pemesan: '',
  email: '',
  no_tlpn: '',
  form: {
    nama_lengkap_pria: '',
    nama_bapak_pria: '',
    nama_ibu_pria: '',
    nama_lengkap_wanita: '',
    nama_bapak_wanita: '',
    nama_ibu_wanita: '',
    hari_tanggal_akad: '',
    waktu_akad: '',
    alamat_akad: '',
    link_gmaps_akad: '',
    hari_tanggal_resepsi: '',
    waktu_resepsi: '',
    alamat_resepsi: '',
    link_gmaps_resepsi: '',
    hitung_mundur: '',
    say_something: '',
    rekening_1: '',
    link_music: ''
  },
  foto: []
})

const previews = ref([])

const handleFileChange = (e) => {
  const files = Array.from(e.target.files)
  const totalFiles = form.value.foto.length + files.length

  if (totalFiles > 4) {
    alert('Maksimal 4 foto!')
    e.target.value = ''
    return
  }

  files.forEach(file => {
    // Validate file size (2MB) and type
    if (file.size > 2 * 1024 * 1024) {
      alert(`File ${file.name} terlalu besar! Maksimal 2MB.`)
      return
    }
    if (!['image/jpeg', 'image/png', 'image/jpg'].includes(file.type)) {
      alert(`File ${file.name} harus berupa JPEG atau PNG!`)
      return
    }
    form.value.foto.push(file)
    previews.value.push(URL.createObjectURL(file))
  })

  e.target.value = ''
}

const removeFile = (index) => {
  form.value.foto.splice(index, 1)
  previews.value.splice(index, 1)
}

const konfirmasi = async () => {
  try {
    // Basic client-side validation
    if (!form.value.nama_pemesan || !form.value.email) {
      alert('Harap isi semua kolom wajib (Nama Pemesan, Email)!')
      return
    }

    const data = new FormData()
    data.append('nama_pemesan', form.value.nama_pemesan)
    data.append('email', form.value.email)
    data.append('no_tlpn', form.value.no_tlpn)
    data.append('template_slug', 'undangan-pernikahan-basic')

    // Append form fields individually to ensure Laravel receives them as an array
    for (const [key, value] of Object.entries(form.value.form)) {
      data.append(`form[${key}]`, value)
    }

    form.value.foto.forEach((file, index) => {
      data.append(`foto[${index}]`, file)
    })

    console.log([...data]) // untuk debugging

    const res = await fetch('http://localhost:8000/api/pelanggans', {
      method: 'POST',
      body: data
    })

    const result = await res.json()

    if (!res.ok) {
      if (res.status === 422) {
        const errors = result.errors || {}
        const errorMessages = Object.values(errors).flat().join('\n')
        throw new Error(errorMessages || result.message || 'Validasi gagal')
      }
      if (res.status === 404) {
        throw new Error(result.message || 'Template tidak ditemukan')
      }
      throw new Error(result.message || 'Gagal mengirim data')
    }

    alert(result.message || 'Data berhasil disimpan!')
    router.push('/')
  } catch (err) {
    console.error(err)
    alert('Terjadi kesalahan: ' + err.message)
  }
}

const batal = () => router.back()
</script>
```