document.addEventListener("DOMContentLoaded", () => {
  // Éléments du DOM
  const invoicesList = document.getElementById("invoicesList");
  const statusFilter = document.getElementById("statusFilter");
  const dateFrom = document.getElementById("dateFrom");
  const dateTo = document.getElementById("dateTo");
  const applyFilters = document.getElementById("applyFilters");
  const modal = document.getElementById("invoiceModal");
  const modalTitle = document.getElementById("modalTitle");
  const modalContent = document.getElementById("modalContent");
  const closeModal = document.getElementById("closeModal");

  // Charger les factures au démarrage
  loadInvoices();

  // Gestionnaire d'événements pour les filtres
  applyFilters.addEventListener("click", () => {
    loadInvoices({
      status: statusFilter.value,
      date_from: dateFrom.value,
      date_to: dateTo.value,
    });
  });

  // Gestionnaire d'événements pour fermer le modal
  closeModal.addEventListener("click", () => {
    modal.classList.add("hidden");
  });

  // Fonction pour charger les factures
  async function loadInvoices(filters = {}) {
    try {
      const response = await fetch(
        "/api/invoices?" + new URLSearchParams(filters)
      );
      const data = await response.json();

      // Mettre à jour les statistiques
      updateStatistics(data.statistics);

      // Mettre à jour la liste des factures
      displayInvoices(data.invoices);
    } catch (error) {
      console.error("Erreur lors du chargement des factures:", error);
      showMessage("Erreur lors du chargement des factures", "error");
    }
  }

  // Fonction pour mettre à jour les statistiques
  function updateStatistics(stats) {
    document.getElementById("totalInvoices").textContent = stats.total_invoices;
    document.getElementById(
      "totalAmount"
    ).textContent = `${stats.total_amount.toFixed(2)} €`;
    document.getElementById(
      "totalPaid"
    ).textContent = `${stats.total_paid.toFixed(2)} €`;
    document.getElementById(
      "totalOverdue"
    ).textContent = `${stats.total_overdue.toFixed(2)} €`;
  }

  // Fonction pour afficher les factures
  function displayInvoices(invoices) {
    invoicesList.innerHTML = "";

    invoices.forEach((invoice) => {
      const row = document.createElement("tr");
      row.innerHTML = `
                <td class="px-6 py-4 whitespace-nowrap text-sm font-medium text-gray-900">
                    ${invoice.invoice_number}
                </td>
                <td class="px-6 py-4 whitespace-nowrap text-sm text-gray-500">
                    ${invoice.client_name}
                </td>
                <td class="px-6 py-4 whitespace-nowrap text-sm text-gray-500">
                    ${new Date(invoice.issue_date).toLocaleDateString()}
                </td>
                <td class="px-6 py-4 whitespace-nowrap text-sm text-gray-500">
                    ${invoice.amount} ${invoice.currency}
                </td>
                <td class="px-6 py-4 whitespace-nowrap">
                    <span class="px-2 inline-flex text-xs leading-5 font-semibold rounded-full 
                        ${getStatusClass(invoice.status)}">
                        ${getStatusText(invoice.status)}
                    </span>
                </td>
                <td class="px-6 py-4 whitespace-nowrap text-sm font-medium">
                    <button onclick="viewInvoice(${
                      invoice.id
                    })" class="text-blue-600 hover:text-blue-900 mr-3">
                        Voir
                    </button>
                    <button onclick="updateStatus(${
                      invoice.id
                    })" class="text-green-600 hover:text-green-900 mr-3">
                        Marquer comme payée
                    </button>
                    <button onclick="downloadInvoice(${
                      invoice.id
                    })" class="text-gray-600 hover:text-gray-900">
                        Télécharger
                    </button>
                </td>
            `;
      invoicesList.appendChild(row);
    });
  }

  // Fonction pour obtenir la classe CSS du statut
  function getStatusClass(status) {
    switch (status) {
      case "paid":
        return "bg-green-100 text-green-800";
      case "overdue":
        return "bg-red-100 text-red-800";
      default:
        return "bg-yellow-100 text-yellow-800";
    }
  }

  // Fonction pour obtenir le texte du statut
  function getStatusText(status) {
    switch (status) {
      case "paid":
        return "Payée";
      case "overdue":
        return "En retard";
      default:
        return "Émise";
    }
  }

  // Fonction pour afficher une facture
  window.viewInvoice = async (invoiceId) => {
    try {
      const response = await fetch(`/api/invoices/${invoiceId}`);
      const invoice = await response.json();

      modalTitle.textContent = `Facture ${invoice.invoice_number}`;
      modalContent.innerHTML = `
                <div class="text-left">
                    <p><strong>Client:</strong> ${invoice.client_name}</p>
                    <p><strong>Date:</strong> ${new Date(
                      invoice.issue_date
                    ).toLocaleDateString()}</p>
                    <p><strong>Montant:</strong> ${invoice.amount} ${
        invoice.currency
      }</p>
                    <p><strong>Statut:</strong> ${getStatusText(
                      invoice.status
                    )}</p>
                    <p><strong>Adresse:</strong> ${invoice.address}</p>
                    <p>${invoice.postal_code} ${invoice.town}</p>
                    <p>${invoice.country}</p>
                </div>
            `;

      modal.classList.remove("hidden");
    } catch (error) {
      console.error("Erreur lors du chargement de la facture:", error);
      showMessage("Erreur lors du chargement de la facture", "error");
    }
  };

  // Fonction pour mettre à jour le statut d'une facture
  window.updateStatus = async (invoiceId) => {
    try {
      await fetch(`/api/invoices/${invoiceId}/status`, {
        method: "PUT",
        headers: {
          "Content-Type": "application/json",
        },
        body: JSON.stringify({ status: "paid" }),
      });

      loadInvoices();
      showMessage("Statut de la facture mis à jour");
    } catch (error) {
      console.error("Erreur lors de la mise à jour du statut:", error);
      showMessage("Erreur lors de la mise à jour du statut", "error");
    }
  };

  // Fonction pour télécharger une facture
  window.downloadInvoice = async (invoiceId) => {
    try {
      const response = await fetch(`/api/invoices/${invoiceId}/download`);
      const blob = await response.blob();

      const url = window.URL.createObjectURL(blob);
      const a = document.createElement("a");
      a.href = url;
      a.download = `invoice_${invoiceId}.pdf`;
      document.body.appendChild(a);
      a.click();
      window.URL.revokeObjectURL(url);
      document.body.removeChild(a);
    } catch (error) {
      console.error("Erreur lors du téléchargement de la facture:", error);
      showMessage("Erreur lors du téléchargement de la facture", "error");
    }
  };
});