import {z} from 'zod'

export type GetApiMcpOauthAuthorizeRequestArgs = {request: string};

export type GetApiMcpOauthAuthorizeRequestOptions = {baseUrl?: string | undefined, SupabaseUserJwt?: string | undefined, fetch?: typeof fetch | undefined};

export const mcpConsentScopes = z.array(z.enum(["leads:read", "leads:contact_read", "leads:contact_enrich", "leads:manage", "analytics:read", "icp:read", "icp:manage", "watchlist:read", "watchlist:manage", "content:read", "integrations:read", "integrations:manage", "integrations:deliver", "sync:read", "agent:read", "agent:run", "workspace:read", "audience_analytics:read", "audience_analytics:request", "post_qualification:manage"]));

export const mcpOAuthAuthorizationPreview = z.object({clientName: z.string(), requestedScopes: mcpConsentScopes, expiresAt: z.string(), resource: z.string()});

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * Preview a pending MCP OAuth authorization request.
 * 
 * GET /mcp/oauth/authorize/request
 */
export const getApiMcpOauthAuthorizeRequest = async (args: GetApiMcpOauthAuthorizeRequestArgs, options?: GetApiMcpOauthAuthorizeRequestOptions) => {
const {baseUrl = "https://api.traxy.ai/api/v1", fetch: fetchFn = fetch, SupabaseUserJwt} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('accept', "application/json")

if (args.request != null) query.append("request", String(args.request))
if (SupabaseUserJwt !== undefined) headers.set('authorization', `Bearer ${SupabaseUserJwt}`)

const url = `${baseUrl.replace(/\/+$/, '')}/mcp/oauth/authorize/request${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(mcpOAuthAuthorizationPreview, await res.json())
};