import {z} from 'zod'

export type GetApiApiVerifyX402ReadinessArgs = {target_url: string};

export type GetApiApiVerifyX402ReadinessOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const reportIntegrity = z.object({algorithm: z.string().optional(), canonical_sha256: z.string().optional(), canonicalization: z.string().optional(), key_id: z.string().optional(), public_key: z.string().optional(), signature: z.string().optional(), signed_by: z.string().optional()});

export const x402ReadinessReport = z.object({base_readiness_score: z.number().int().optional(), buyer_conversion_next_step: z.object({commercial_boundary: z.string().optional(), free_diagnostic: z.record(z.string(), z.unknown()).optional(), recommended_action: z.record(z.string(), z.unknown()).optional(), schema: z.literal("ontario.buyer_conversion_next_step.v1").optional(), signed_evidence_boundary: z.string().optional(), status: z.literal("buyer_job_required").optional()}).and(z.record(z.string(), z.unknown())).optional(), evidence: z.object({}).optional(), grade: z.enum(["ready", "close", "needs_work"]).optional(), integrity: reportIntegrity.optional(), max_score: z.number().int().optional(), normalized_base: z.string().optional(), provider_listing_next_step: z.object({free_validation: z.record(z.string(), z.unknown()).optional(), publication: z.object({asset: z.string().optional(), listing_page: z.string().optional(), method: z.literal("POST").optional(), network: z.literal("eip155:8453").optional(), price_usdc: z.literal("0.50").optional(), url: z.string().optional(), value: z.string().optional()}).and(z.record(z.string(), z.unknown())).optional(), ready_for_listing_preflight: z.boolean().optional(), recommended_action: z.record(z.string(), z.unknown()).optional(), schema: z.literal("ontario.provider_listing_next_step.v1").optional(), sequence: z.array(z.string()).optional(), signed_evidence_boundary: z.string().optional(), status: z.enum(["ready_for_free_listing_validation", "fix_before_listing"]).optional(), trust_boundary: z.string().optional()}).and(z.record(z.string(), z.unknown())).optional(), readiness_score: z.number().int().optional(), recommendations: z.array(z.object({detail: z.string().optional(), docs_url: z.string().optional(), id: z.string().optional(), title: z.string().optional()})).optional(), report_id: z.string().optional(), report_url: z.string().optional(), signals: z.object({}).optional(), status: z.string().optional(), target_url: z.string().optional(), verifier: z.string().optional(), warning_penalty: z.number().int().optional(), warnings: z.array(z.object({detail: z.string().optional(), docs_url: z.string().optional(), id: z.string().optional(), severity: z.string().optional(), title: z.string().optional()})).optional()});

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
};

/**
 * Verify x402 readiness from query parameters
 * 
 * GET /api/verify/x402-readiness
 */
export const getApiApiVerifyX402Readiness = async (args: GetApiApiVerifyX402ReadinessArgs, options?: GetApiApiVerifyX402ReadinessOptions) => {
const {baseUrl = "https://ontarioprotocol.com", fetch: fetchFn = fetch} = options ?? {}

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

if (args.target_url != null) query.append("target_url", String(args.target_url))

const url = `${baseUrl.replace(/\/+$/, '')}/api/verify/x402-readiness${query.size > 0 ? `?${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(x402ReadinessReport, await res.json())
};