import {z} from 'zod'

export type GetApiApiV1EuropeanCommissionVatRatesArgs = {country?: (string | null) | undefined, type?: (string | null) | undefined, rate_kind?: (string | null) | undefined, category?: (string | null) | undefined, national_standard_only?: boolean | undefined};

export type GetApiApiV1EuropeanCommissionVatRatesOptions = {baseUrl?: string | undefined, APIKeyHeader?: string | undefined, fetch?: typeof fetch | undefined};

export const vatNationalStandardRate = z.object({member_state: z.string().nullable().optional(), rate: z.union([z.number().int(), z.number()]).nullable().optional(), situation_on: z.string().nullable().optional()}).and(z.record(z.string(), z.unknown()));

export const vatRateEntry = z.object({member_state: z.string().nullable().optional(), type: z.string().nullable().optional(), rate_kind: z.string().nullable().optional(), rate: z.union([z.number().int(), z.number()]).nullable().optional(), category: z.string().nullable().optional(), category_description: z.string().nullable().optional(), cn_codes: z.array(z.string()).nullable().optional(), cpa_codes: z.array(z.string()).nullable().optional(), comment: z.string().nullable().optional(), regime: z.string().nullable().optional(), national_standard: z.boolean().nullable().optional(), situation_on: z.string().nullable().optional()}).and(z.record(z.string(), z.unknown()));

export const vatRatesData = z.object({situation_on: z.string().nullable().optional(), countries: z.array(z.string()).nullable().optional(), unit: z.string().nullable().optional(), count: z.number().int().nullable().optional(), national_standard_rates: z.array(vatNationalStandardRate).nullable().optional(), entries: z.array(vatRateEntry).nullable().optional(), source: z.string().nullable().optional(), attribution: z.string().nullable().optional(), license: z.string().nullable().optional(), license_url: z.string().nullable().optional(), terms_url: z.string().nullable().optional(), notice: z.string().nullable().optional(), note: z.string().nullable().optional()}).and(z.record(z.string(), z.unknown()));

export const sugraMeta = z.object({endpoint: z.string(), data_time: z.string(), response_time: z.string(), provider: z.string(), data_age_days: z.number().nullable().optional(), source: z.string().nullable().optional(), attribution: z.string().nullable().optional(), source_url: z.string().nullable().optional(), citation: z.string().nullable().optional(), fallback_used: z.boolean().nullable().optional(), fallback_chain: z.array(z.string()).nullable().optional(), cached: z.boolean().nullable().optional(), stale: z.boolean().nullable().optional(), stale_since: z.string().nullable().optional(), period: z.string().nullable().optional(), notes: z.string().nullable().optional()});

export const envelopeVatRatesData = z.object({data: vatRatesData, meta: sugraMeta});

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
};

/**
 * EU VAT rates by member state
 * 
 * GET /api/v1/european-commission/vat-rates
 */
export const getApiApiV1EuropeanCommissionVatRates = async (args: GetApiApiV1EuropeanCommissionVatRatesArgs, options?: GetApiApiV1EuropeanCommissionVatRatesOptions) => {
const {baseUrl = "https://sugra.ai", fetch: fetchFn = fetch, APIKeyHeader} = options ?? {}

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

if (args.country != null) query.append("country", String(args.country))
if (args.type != null) query.append("type", String(args.type))
if (args.rate_kind != null) query.append("rate_kind", String(args.rate_kind))
if (args.category != null) query.append("category", String(args.category))
if (args.national_standard_only != null) query.append("national_standard_only", String(args.national_standard_only))
if (APIKeyHeader !== undefined) headers.set("x-api-key", APIKeyHeader)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/european-commission/vat-rates${query.size > 0 ? `?${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(envelopeVatRatesData, await res.json())
};