package forms

type RegisterPasskeyData struct {
	Address       string
	Handle        string
	Name          string
	Challenge     string
	CreationBlock string
}

templ RegisterPasskey(action, method string, data RegisterPasskeyData) {
	<form action={ templ.SafeURL(action) } method={ method } id="passkey-form">
		<input type="hidden" name="credential" id="credential-data" required/>
		<sl-card class="card-form gap-4 max-w-lg">
			<div slot="header">
				<div class="w-full py-2">
					@sonrProfile(data.Address, data.Name, data.Handle, data.CreationBlock)
				</div>
			</div>
			<div slot="footer" class="space-y-2">
				@passkeyDropzone(data.Address, data.Handle, data.Challenge)
				<sl-button href="/" style="width: 100%;" outline>
					<sl-icon slot="prefix" name="x-lg"></sl-icon>
					Cancel
				</sl-button>
			</div>
			<style>
  		.card-form [slot='footer'] {
    		justify-content: space-evenly;
    		align-items: center;
  		}
		</style>
		</sl-card>
	</form>
}

templ passkeyDropzone(addr string, userHandle string, challenge string) {
	<sl-button style="width: 100%;" onclick={ createPasskey(addr, userHandle, challenge) }>
		<sl-icon slot="prefix" name="passkey" library="sonr" style="font-size: 24px;" class="text-neutral-500"></sl-icon>
		Register Passkey
	</sl-button>
}

script createPasskey(userId string, userHandle string, challenge string) {
const publicKey = {
  challenge: Uint8Array.from(challenge, (c) => c.charCodeAt(0)),
  rp: {
    name: "Sonr.ID",
  },
  user: {
    // Assuming that userId is ASCII-only
    id: Uint8Array.from(userId, (c) => c.charCodeAt(0)),
    name: userId,
    displayName: userHandle,
  },
  pubKeyCredParams: [
    {
      type: "public-key",
      alg: -7, // "ES256"
    },
    {
      type: "public-key",
      alg: -257, // "RS256"
    },
  ],
  authenticatorSelection: {
    userVerification: "required",
    residentKey: "required",
    authenticatorAttachment: "platform",
  },
  timeout: 60000, // 1 minute
  extensions: {
    payment: {
      isPayment: true,
    },
  },
};
// Helper function to convert ArrayBuffer to Base64URL string
function arrayBufferToBase64URL(buffer) {
  const bytes = new Uint8Array(buffer);
  let str = '';
  bytes.forEach(byte => { str += String.fromCharCode(byte) });
  return btoa(str)
    .replace(/\+/g, '-')
    .replace(/\//g, '_')
    .replace(/=/g, '');
}

navigator.credentials
  .create({ publicKey })
  .then((newCredentialInfo) => {
    if (!(newCredentialInfo instanceof PublicKeyCredential)) {
      throw new Error('Received credential is not a PublicKeyCredential');
    }

    const response = newCredentialInfo.response;
    if (!(response instanceof AuthenticatorAttestationResponse)) {
      throw new Error('Response is not an AuthenticatorAttestationResponse');
    }

    // Convert the credential data to a cross-platform compatible format
    const credentialJSON = {
      id: newCredentialInfo.id,
      rawId: arrayBufferToBase64URL(newCredentialInfo.rawId),
      type: newCredentialInfo.type,
      authenticatorAttachment: newCredentialInfo.authenticatorAttachment || null,
      transports: Array.isArray(response.getTransports) ? response.getTransports() : [],
      clientExtensionResults: newCredentialInfo.getClientExtensionResults(),
      response: {
        attestationObject: arrayBufferToBase64URL(response.attestationObject),
        clientDataJSON: arrayBufferToBase64URL(response.clientDataJSON)
      }
    };

    // Set the form value with the stringified credential data
    const credentialInput = document.getElementById('credential-data');
    credentialInput.value = JSON.stringify(credentialJSON);
    
    // Submit the form
    const form = document.getElementById('passkey-form');
    form.submit();
  })
  .catch((err) => {
    console.error('Passkey creation failed:', err);
    alert(`Failed to create passkey: ${err.message || 'Unknown error'}`);
  });
}

templ sonrProfile(addr string, name string, handle string, creationBlock string) {
	<div class="profile-card min-w-[320px]">
		<div class="text-white max-w-xs my-auto mx-auto bg-gradient-to-r from-cyan-700 to-cyan-300 p-4 py-5 px-5 rounded-xl">
			<div class="flex justify-between">
				<div>
					<h2>sonr-testnet-1</h2>
					<p class="text-2xl font-bold">{ handle }</p>
				</div>
				<div class="flex items-center opacity-60">
					<sl-icon style="font-size: 52px;" library="sonr" name="sonr-fill"></sl-icon>
				</div>
			</div>
			<div class="mt-5 flex justify-between items-center w-52">
				<span class="text-lg font-mono">{ shortenAddress(addr) }</span>
			</div>
			<div class="flex justify-between mt-5 w-48 ">
				<div>
					<h3 class="text-xs">Block Created </h3>
					<p class="font-bold"><span>#</span>{ creationBlock }</p>
				</div>
				<div>
					<h3 class="text-xs">Issued to</h3>
					<p class="font-bold">{ name }</p>
				</div>
			</div>
		</div>
	</div>
}

// Helper function to shorten address
func shortenAddress(address string) string {
	if len(address) <= 20 {
		return address
	}
	return address[:16] + "..." + address[len(address)-4:]
}