// routes/landlord/tenants/invite.tsx
import { define } from "../../../utils.ts";
import { page } from "fresh";
import type { SessionCookie } from "../../auth/callback.ts";
import type { Property, TenantInvite } from "../../../db/interfaces.ts";
import { getPropertiesByOwner } from "../../../services/propertyService.ts";
import LandlordInviteTenant from "../../../islands/LandlordInviteTenant.tsx";
import { getTenantInviteById } from "../../../services/tenantInviteService.ts";

function parseInvitedEmails(value?: string | null) {
  if (!value) return [];
  try {
    const parsed = JSON.parse(value);
    if (Array.isArray(parsed)) {
      return parsed.filter((item) => typeof item === "string");
    }
  } catch (_error) {
    // Fall back to comma-separated parsing.
  }
  return value.split(",").map((item) => item.trim()).filter(Boolean);
}

interface InviteTenantPageData {
  stateData: SessionCookie;
  properties: Property[];
  invite: TenantInvite | null;
  error?: string;
}

export const handler = define.handlers({
  async GET(ctx) {
    const stateData = ctx.state.data as SessionCookie;
    const { user_id } = stateData;

    try {
      const properties = await getPropertiesByOwner(user_id);
      const url = new URL(ctx.req.url);
      const inviteId = url.searchParams.get("invite_id");

      const invite = inviteId ? await getTenantInviteById(inviteId) : null;
      if (inviteId && (!invite || invite.landlord_id !== user_id)) {
        return page({
          stateData,
          properties,
          invite: null,
          error: "Invite not found. Please start a new invite.",
        });
      }

      return page({
        stateData,
        properties,
        invite,
      });
    } catch (error) {
      console.error("Error loading invite tenant page:", error);
      return page({
        stateData,
        properties: [],
        invite: null,
        error: "Unable to load your properties. Please try again.",
      });
    }
  },
});

export default define.page(function InviteTenantPage({ data }) {
  const { stateData, properties, invite, error } = data as InviteTenantPageData;
  const landlordName = stateData?.user_name || "Your landlord";
  const inviteEmails = parseInvitedEmails(invite?.invited_emails);

  return (
    <div class="min-h-screen bg-gray-50">
      <div class="bg-white shadow">
        <div class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
          <div class="flex flex-col gap-4 py-6 sm:flex-row sm:items-center sm:justify-between">
            <div>
              <h1 class="text-3xl font-bold text-gray-900">
                Invite a Tenant
              </h1>
              <p class="mt-1 text-sm text-gray-500">
                Send a pre-filled invite email linked to the right rental.
              </p>
            </div>
            <div class="flex space-x-3">
              <a
                href="/landlord/dashboard"
                class="inline-flex items-center px-4 py-2 border border-gray-300 text-sm font-medium rounded-md text-gray-700 bg-white hover:bg-gray-50"
              >
                Back to Dashboard
              </a>
            </div>
          </div>
        </div>
      </div>

      <div class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-8">
        {error && (
          <div class="mb-6 bg-red-50 border border-red-200 text-red-700 px-4 py-3 rounded">
            {error}
          </div>
        )}

        {properties.length === 0
          ? (
            <div class="bg-white shadow rounded-lg p-6">
              <h2 class="text-lg font-semibold text-gray-900">
                Add a property first
              </h2>
              <p class="mt-2 text-sm text-gray-500">
                You need at least one property to generate an invite link.
              </p>
              <a
                href="/landlord/properties/add"
                class="mt-4 inline-flex items-center px-4 py-2 border border-transparent text-sm font-medium rounded-md text-white bg-blue-600 hover:bg-blue-700"
              >
                Add Property
              </a>
            </div>
          )
          : invite
          ? (
            <LandlordInviteTenant
              properties={properties}
              landlordName={landlordName}
              inviteId={invite.id}
              invitePropertyId={invite.property_id ?? ""}
              inviteAvailableOn={invite.available_on ?? null}
              inviteEmails={inviteEmails}
            />
          )
          : (
            <LandlordInviteTenant
              properties={properties}
              landlordName={landlordName}
              inviteId=""
              invitePropertyId=""
              inviteAvailableOn={null}
              inviteEmails={[]}
            />
          )}
      </div>
    </div>
  );
});