import type { ActionFunctionArgs, LoaderFunctionArgs, MetaFunction } from "@remix-run/node";
import { json, redirect } from "@remix-run/node";
import { Form, useActionData, useLoaderData, useNavigation } from "@remix-run/react";
import { requireAuthLevel } from "~/utils/auth.server";
import DashboardLayout from "~/components/DashboardLayout";
import FormModal from "~/components/FormModal";
import Toast from "~/components/Toast";
import { PrismaClient } from "@prisma/client";
import { useState, useEffect } from "react";

const prisma = new PrismaClient();

export const meta: MetaFunction = () => [{ title: "Reclamation Locations Management - Phosphat Report" }];

export const loader = async ({ request }: LoaderFunctionArgs) => {
  const user = await requireAuthLevel(request, 2);
  
  const reclamationLocations = await prisma.reclamationLocation.findMany({
    orderBy: { name: 'asc' },
    include: {
      _count: {
        select: { reports: true }
      }
    }
  });

  return json({ user, reclamationLocations });
};

export const action = async ({ request }: ActionFunctionArgs) => {
  await requireAuthLevel(request, 2);
  
  const formData = await request.formData();
  const intent = formData.get("intent");
  const id = formData.get("id");
  const name = formData.get("name");

  if (intent === "create") {
    if (typeof name !== "string" || name.length === 0) {
      return json({ errors: { name: "Name is required" } }, { status: 400 });
    }

    try {
      await prisma.reclamationLocation.create({
        data: { name }
      });
      return json({ success: "Reclamation location created successfully!" });
    } catch (error) {
      return json({ errors: { form: "Reclamation location name already exists" } }, { status: 400 });
    }
  }

  if (intent === "update") {
    if (typeof name !== "string" || name.length === 0) {
      return json({ errors: { name: "Name is required" } }, { status: 400 });
    }
    if (typeof id !== "string") {
      return json({ errors: { form: "Invalid reclamation location ID" } }, { status: 400 });
    }

    try {
      await prisma.reclamationLocation.update({
        where: { id: parseInt(id) },
        data: { name }
      });
      return json({ success: "Reclamation location updated successfully!" });
    } catch (error) {
      return json({ errors: { form: "Reclamation location name already exists" } }, { status: 400 });
    }
  }

  if (intent === "delete") {
    if (typeof id !== "string") {
      return json({ errors: { form: "Invalid reclamation location ID" } }, { status: 400 });
    }

    try {
      await prisma.reclamationLocation.delete({
        where: { id: parseInt(id) }
      });
      return json({ success: "Reclamation location deleted successfully!" });
    } catch (error) {
      return json({ errors: { form: "Cannot delete reclamation location with existing reports" } }, { status: 400 });
    }
  }

  return json({ errors: { form: "Invalid action" } }, { status: 400 });
};

export default function ReclamationLocations() {
  const { user, reclamationLocations } = useLoaderData<typeof loader>();
  const actionData = useActionData<typeof action>();
  const navigation = useNavigation();
  const [editingLocation, setEditingLocation] = useState<{ id: number; name: string } | null>(null);
  const [showModal, setShowModal] = useState(false);
  const [toast, setToast] = useState<{ message: string; type: "success" | "error" } | null>(null);

  const isSubmitting = navigation.state === "submitting";
  const isEditing = editingLocation !== null;

  // Handle success/error messages
  useEffect(() => {
    if (actionData?.success) {
      setToast({ message: actionData.success, type: "success" });
      setShowModal(false);
      setEditingLocation(null);
    } else if (actionData?.errors?.form) {
      setToast({ message: actionData.errors.form, type: "error" });
    }
  }, [actionData]);

  const handleEdit = (location: { id: number; name: string }) => {
    setEditingLocation(location);
    setShowModal(true);
  };

  const handleAdd = () => {
    setEditingLocation(null);
    setShowModal(true);
  };

  const handleCloseModal = () => {
    setShowModal(false);
    setEditingLocation(null);
  };

  return (
    <DashboardLayout user={user}>
      <div className="space-y-6">
        <div className="flex justify-between items-center">
          <div>
            <h1 className="text-2xl font-bold text-gray-900">Reclamation Locations Management</h1>
            <p className="mt-1 text-sm text-gray-600">Manage shoreline reclamation locations</p>
          </div>
          <button
            onClick={handleAdd}
            className="inline-flex items-center px-4 py-2 border border-transparent text-sm font-medium rounded-md text-white bg-indigo-600 hover:bg-indigo-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-indigo-500 transition-colors duration-200"
          >
            <svg className="w-5 h-5 mr-2" fill="none" stroke="currentColor" viewBox="0 0 24 24">
              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 6v6m0 0v6m0-6h6m-6 0H6" />
            </svg>
            Add New Location
          </button>
        </div>

        {/* Locations Table */}
        <div className="bg-white shadow-sm rounded-lg overflow-hidden">
          <div className="overflow-x-auto">
            <table className="min-w-full divide-y divide-gray-200">
              <thead className="bg-gray-50">
                <tr>
                  <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
                    Location Name
                  </th>
                  <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
                    Reports Count
                  </th>
                  <th className="px-6 py-3 text-right text-xs font-medium text-gray-500 uppercase tracking-wider">
                    Actions
                  </th>
                </tr>
              </thead>
              <tbody className="bg-white divide-y divide-gray-200">
                {reclamationLocations.map((location) => (
                  <tr key={location.id} className="hover:bg-gray-50 transition-colors duration-150">
                    <td className="px-6 py-4 whitespace-nowrap">
                      <div className="flex items-center">
                        <div className="flex-shrink-0 h-10 w-10">
                          <div className="h-10 w-10 rounded-full bg-green-100 flex items-center justify-center">
                            <svg className="h-5 w-5 text-green-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M3.055 11H5a2 2 0 012 2v1a2 2 0 002 2 2 2 0 012 2v2.945M8 3.935V5.5A2.5 2.5 0 0010.5 8h.5a2 2 0 012 2 2 2 0 104 0 2 2 0 012-2h1.064M15 20.488V18a2 2 0 012-2h3.064M21 12a9 9 0 11-18 0 9 9 0 0118 0z" />
                            </svg>
                          </div>
                        </div>
                        <div className="ml-4">
                          <div className="text-sm font-medium text-gray-900">{location.name}</div>
                          {/* <div className="text-sm text-gray-500">Location #{location.id}</div> */}
                        </div>
                      </div>
                    </td>
                    <td className="px-6 py-4 whitespace-nowrap">
                      <span className="inline-flex items-center px-2.5 py-0.5 rounded-full text-xs font-medium bg-blue-100 text-blue-800">
                        {location._count.reports} reports
                      </span>
                    </td>
                    <td className="px-6 py-4 whitespace-nowrap text-right text-sm font-medium">
                      <div className="flex justify-end space-x-2">
                        <button
                          onClick={() => handleEdit(location)}
                          className="text-indigo-600 hover:text-indigo-900 transition-colors duration-150"
                        >
                          Edit
                        </button>
                        <Form method="post" className="inline">
                          <input type="hidden" name="intent" value="delete" />
                          <input type="hidden" name="id" value={location.id} />
                          <button
                            type="submit"
                            onClick={(e) => {
                              if (!confirm("Are you sure you want to delete this reclamation location?")) {
                                e.preventDefault();
                              }
                            }}
                            className="text-red-600 hover:text-red-900 transition-colors duration-150"
                          >
                            Delete
                          </button>
                        </Form>
                      </div>
                    </td>
                  </tr>
                ))}
              </tbody>
            </table>
          </div>
          {reclamationLocations.length === 0 && (
            <div className="text-center py-12">
              <svg className="mx-auto h-12 w-12 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M3.055 11H5a2 2 0 012 2v1a2 2 0 002 2 2 2 0 012 2v2.945M8 3.935V5.5A2.5 2.5 0 0010.5 8h.5a2 2 0 012 2 2 2 0 104 0 2 2 0 012-2h1.064M15 20.488V18a2 2 0 012-2h3.064M21 12a9 9 0 11-18 0 9 9 0 0118 0z" />
              </svg>
              <h3 className="mt-2 text-sm font-medium text-gray-900">No reclamation locations</h3>
              <p className="mt-1 text-sm text-gray-500">Get started by creating your first reclamation location.</p>
              <div className="mt-6">
                <button
                  onClick={handleAdd}
                  className="inline-flex items-center px-4 py-2 border border-transparent shadow-sm text-sm font-medium rounded-md text-white bg-indigo-600 hover:bg-indigo-700"
                >
                  <svg className="w-5 h-5 mr-2" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 6v6m0 0v6m0-6h6m-6 0H6" />
                  </svg>
                  Add Location
                </button>
              </div>
            </div>
          )}
        </div>

        {/* Form Modal */}
        <FormModal
          isOpen={showModal}
          onClose={handleCloseModal}
          title={isEditing ? "Edit Reclamation Location" : "Add New Reclamation Location"}
          isSubmitting={isSubmitting}
          submitText={isEditing ? "Update Location" : "Create Location"}
        >
          <Form method="post" id="modal-form" className="space-y-4">
            <input type="hidden" name="intent" value={isEditing ? "update" : "create"} />
            {isEditing && <input type="hidden" name="id" value={editingLocation?.id} />}
            
            <div>
              <label htmlFor="name" className="block text-sm font-medium text-gray-700 mb-2">
                Location Name
              </label>
              <input
                type="text"
                name="name"
                id="name"
                required
                defaultValue={editingLocation?.name || ""}
                className="block w-full border-gray-300 h-9 p-2 rounded-md shadow-sm focus:ring-indigo-500 focus:border-indigo-500 sm:text-sm"
                placeholder="Enter location name (e.g., Eastern Shoreline)"
              />
              {actionData?.errors?.name && (
                <p className="mt-1 text-sm text-red-600">{actionData.errors.name}</p>
              )}
            </div>
          </Form>
        </FormModal>

        {/* Toast Notifications */}
        {toast && (
          <Toast
            message={toast.message}
            type={toast.type}
            onClose={() => setToast(null)}
          />
        )}
      </div>
    </DashboardLayout>
  );
}