import { sdk } from '../sdk'
import { configFile } from '../file-models/config.json'

const { InputSpec, Value } = sdk

// Connects the relay to the operator's BTCPay store so users can top
// up their credit balance via Lightning / on-chain payments. All
// four fields must be set together — leaving any blank disables the
// credit-purchase flow (the rest of the relay keeps working).
//
// To generate the API key in BTCPay:
//   1. Account → Manage Account → API Keys
//   2. "Generate Key" with scopes:
//        - btcpay.store.cancreateinvoice
//        - btcpay.store.canviewinvoices
//   3. Restrict to your Recap store
//
// To set up the webhook in BTCPay:
//   1. Open your "Recap" store → Settings → Webhooks
//   2. URL: https://<your-relay-host>/relay/btcpay/webhook
//   3. Subscribe to: "An invoice has been settled"
//   4. Set "Automatic redelivery" on
//   5. Copy the auto-generated secret into the field below
const inputSpec = InputSpec.of({
  relay_btcpay_base_url: Value.text({
    name: 'BTCPay Base URL',
    description:
      'Public URL of your BTCPay server. The relay POSTs invoice-create requests here, and BTCPay POSTs webhooks back to /relay/btcpay/webhook on your relay host. Example: https://btcpay.keysat.xyz',
    required: false,
    default: null,
    minLength: 0,
    maxLength: 256,
    patterns: [
      {
        regex: '^(https?://.+)?$',
        description: 'Must be empty or start with http:// or https://',
      },
    ],
  }),
  relay_btcpay_store_id: Value.text({
    name: 'BTCPay Store ID',
    description:
      'UUID of the BTCPay store invoices should be created against. Find it in BTCPay → Store Settings → General → Store ID.',
    required: false,
    default: null,
    minLength: 0,
    maxLength: 64,
  }),
  relay_btcpay_api_key: Value.text({
    name: 'BTCPay API Key',
    description:
      'Greenfield API token with the canCreateInvoice + canViewInvoices scopes restricted to your Recap store. Generated under Account → Manage Account → API Keys.',
    required: false,
    default: null,
    masked: true,
    minLength: 0,
    maxLength: 256,
  }),
  relay_btcpay_webhook_secret: Value.text({
    name: 'BTCPay Webhook Secret',
    description:
      'Shared secret BTCPay uses to HMAC-sign webhook deliveries to /relay/btcpay/webhook. Get this from BTCPay → Store Settings → Webhooks after creating the webhook entry.',
    required: false,
    default: null,
    masked: true,
    minLength: 0,
    maxLength: 256,
  }),
})

export const setBtcpayConnection = sdk.Action.withInput(
  'set-btcpay-connection',

  async ({ effects }) => ({
    name: 'Set BTCPay Connection (credit purchases)',
    description:
      'Wire the relay to your BTCPay store so users can buy credit top-ups via Lightning. Leave any field blank to disable the credit-purchase flow — the rest of the relay keeps working without it.',
    warning: null,
    allowedStatuses: 'any',
    group: 'Tiers',
    visibility: 'enabled',
  }),

  inputSpec,

  async ({ effects }) => {
    const config = await configFile.read().once()
    return {
      relay_btcpay_base_url: config?.relay_btcpay_base_url || undefined,
      relay_btcpay_store_id: config?.relay_btcpay_store_id || undefined,
      relay_btcpay_api_key: config?.relay_btcpay_api_key || undefined,
      relay_btcpay_webhook_secret:
        config?.relay_btcpay_webhook_secret || undefined,
    }
  },

  async ({ effects, input }) => {
    await configFile.merge(effects, {
      relay_btcpay_base_url: (input.relay_btcpay_base_url || '').trim(),
      relay_btcpay_store_id: (input.relay_btcpay_store_id || '').trim(),
      relay_btcpay_api_key: (input.relay_btcpay_api_key || '').trim(),
      relay_btcpay_webhook_secret: (
        input.relay_btcpay_webhook_secret || ''
      ).trim(),
    })
    return null
  },
)