import { useCallback, useRef, useState } from "preact/hooks";
import {
  encryptDataWithStoredPassword,
  getEncryptionPassword,
} from "../helpers.ts";

interface AddIncomeModalProps {
  userId?: string;
}

export default function AddIncomeModal(
  { userId }: AddIncomeModalProps,
) {
  const formRef = useRef<HTMLFormElement>(null);
  const encryptedDataRef = useRef<HTMLInputElement>(null);
  const sourceRef = useRef<HTMLInputElement>(null);
  const amountRef = useRef<HTMLInputElement>(null);
  const [loading, setLoading] = useState(false);
  const today = new Date().toISOString().split("T")[0];

  // Only encrypt on submit, not on every keystroke - prevents V8 overload
  const handleEncryptData = useCallback(async () => {
    // Get current values from the form inputs
    const source = sourceRef.current?.value || "";
    const amount = amountRef.current?.value || "";

    // Check if encryption is available and encrypt the sensitive fields
    if (userId && (source || amount)) {
      const encryptionPassword = getEncryptionPassword(userId);

      if (encryptionPassword) {
        try {
          const dataToEncrypt = {
            source: source,
            amount: parseFloat(amount) || 0,
          };

          const encryptedData = await encryptDataWithStoredPassword(
            userId,
            JSON.stringify(dataToEncrypt),
          );

          if (encryptedData && encryptedDataRef.current) {
            // Set encrypted data
            encryptedDataRef.current.value = encryptedData;
          }
        } catch (error) {
          console.error("Failed to encrypt income data:", error);
        }
      }
    }
  }, [userId]);

  const handleAddClick = async () => {
    setLoading(true);
    // Encrypt data before submission
    await handleEncryptData();

    // Get current values from the form inputs
    const source = sourceRef.current?.value || "";
    const amount = amountRef.current?.value || "";

    // Clear plaintext fields if encryption was successful
    if (userId && (source || amount)) {
      const encryptionPassword = getEncryptionPassword(userId);

      if (encryptionPassword && encryptedDataRef.current?.value) {
        if (sourceRef.current) sourceRef.current.value = "";
        if (amountRef.current) amountRef.current.value = "";
      }
    }

    // Submit the form using formRef
    setTimeout(() => {
      if (formRef.current) {
        formRef.current.submit();
      }
    }, 100);
  };

  return (
    <div class="bg-white rounded-lg p-8 shadow-lg max-w-md w-full">
      <h3 class="text-xl font-bold mb-4">Add Income</h3>
      <form
        ref={formRef}
        method="POST"
        action="/api/create/income"
        class="flex flex-col gap-4"
      >
        <input
          type="hidden"
          name="sender"
          value="/calendar/every-income?modal=off"
        />
        <input
          ref={encryptedDataRef}
          type="hidden"
          name="encrypted_data"
          value=""
        />
        <input
          ref={sourceRef}
          class="border rounded px-3 py-2"
          placeholder="Source"
          name="source"
          required
        />
        <input
          ref={amountRef}
          class="border rounded px-3 py-2"
          placeholder="Amount"
          type="number"
          step="0.01"
          name="amount"
          required
        />
        <select
          class="w-full border p-2 rounded"
          name="frequency"
          required
          defaultValue="Monthly"
        >
          <option value="Biweekly">Biweekly</option>
          <option value="Weekly">Weekly</option>
          <option value="Monthly">Monthly</option>
          <option value="Quarterly">Quarterly</option>
          <option value="Yearly">Yearly</option>
        </select>
        <input
          class="border rounded px-3 py-2"
          placeholder="Received On (YYYY-MM-DD)"
          type="date"
          name="received_date"
          required
          defaultValue={today}
        />
      </form>
      <div class="flex gap-2 justify-end mt-4">
        <a
          href="/calendar/every-income"
          class="px-4 py-2 rounded bg-gray-300 hover:bg-gray-400 text-center inline-block"
        >
          Cancel
        </a>
        <button
          type="button"
          onClick={handleAddClick}
          class="px-4 py-2 rounded bg-green-600 text-white hover:bg-green-700"
          disabled={loading}
        >
          {loading ? "Adding..." : "Add"}
        </button>
      </div>
    </div>
  );
}