import { useState } from "react";
import { Text } from "@/components/ui/text";
import { SignaturePad } from "@/app/v/_components/signature-pad";
import { vendorPortalApi } from "@/domain/vendor-portal/api/vendor-portal-api";
import { formatVendorPortalDateTime } from "@/domain/vendor-portal/lib/status-helpers";
import type { VendorPortalSignoff } from "@/domain/vendor-portal/types/vendor-portal";

type SignoffSectionProps = {
  token: string;
  dispatchId: number;
  existing: VendorPortalSignoff[];
  signoffType: string;
  nameLabel: string;
  onAdded: () => void;
};

export function SignoffSection({
  token,
  dispatchId,
  existing,
  signoffType,
  nameLabel,
  onAdded,
}: SignoffSectionProps) {
  const [name, setName] = useState("");
  const [method, setMethod] = useState<"drawn" | "typed">("drawn");
  const [typedSig, setTypedSig] = useState("");
  const [drawnSig, setDrawnSig] = useState("");
  const [submitting, setSubmitting] = useState(false);
  const [errorMessage, setErrorMessage] = useState("");

  const existingSignoff = existing.find((signoff) => signoff.signoffType === signoffType);

  if (existingSignoff) {
    return (
      <div>
        <div className="vp-row">
          <strong>Signed by</strong>
          <span>{existingSignoff.name}</span>
        </div>
        <div className="vp-row">
          <strong>Method</strong>
          <span>{existingSignoff.signatureMethod}</span>
        </div>
        <div className="vp-row">
          <strong>Signed at</strong>
          <span>{formatVendorPortalDateTime(existingSignoff.signedAt)}</span>
        </div>
      </div>
    );
  }

  const submit = async (event: React.FormEvent) => {
    event.preventDefault();
    const signature = method === "drawn" ? drawnSig : typedSig;
    if (!name.trim() || !signature) {
      setErrorMessage("Name and signature are required.");
      return;
    }
    setErrorMessage("");
    setSubmitting(true);
    try {
      await vendorPortalApi.addSignoff(token, dispatchId, {
        name: name.trim(),
        signature,
        signatureMethod: method,
        signoffType,
      });
      onAdded();
    } catch {
      setErrorMessage("Unable to submit the signoff. Please try again.");
    } finally {
      setSubmitting(false);
    }
  };

  return (
    <form onSubmit={(event) => void submit(event)}>
      <div className="vp-row">
        <strong>{nameLabel}</strong>
        <input
          className="vp-input"
          value={name}
          onChange={(event) => {
            setName(event.target.value);
            setErrorMessage("");
          }}
        />
      </div>
      <div className="vp-row">
        <strong>Method</strong>
        <div>
          <label style={{ marginRight: 12 }}>
            <input type="radio" checked={method === "drawn"} onChange={() => setMethod("drawn")} />{" "}
            Drawn
          </label>
          <label>
            <input type="radio" checked={method === "typed"} onChange={() => setMethod("typed")} />{" "}
            Typed
          </label>
        </div>
      </div>
      {method === "drawn" ? (
        <div style={{ marginTop: 8 }}>
          <SignaturePad
            onChange={(signature) => {
              setDrawnSig(signature);
              setErrorMessage("");
            }}
          />
        </div>
      ) : (
        <div className="vp-row">
          <strong>Signature</strong>
          <input
            className="vp-input"
            value={typedSig}
            onChange={(event) => {
              setTypedSig(event.target.value);
              setErrorMessage("");
            }}
          />
        </div>
      )}
      <Text variant="error" when={Boolean(errorMessage)}>
        {errorMessage}
      </Text>
      <div className="vp-actions">
        <button type="submit" className="vp-btn vp-btn-success" disabled={submitting}>
          {submitting ? "Signing…" : "Submit Signoff"}
        </button>
      </div>
    </form>
  );
}