import {z} from 'zod'

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

export const wafSupportedValues = z.object({values: z.array(z.string()).nullable().optional(), editable: z.boolean().optional()});

export const wafRuleOperatorType = z.union([z.literal(0), z.literal(1), z.literal(2), z.literal(3), z.literal(4), z.literal(5), z.literal(6), z.literal(7), z.literal(8), z.literal(9), z.literal(12), z.literal(13), z.literal(14), z.literal(15), z.literal(17), z.literal(18)]);

export const wafRecommendedOperator = z.object({operator: wafRuleOperatorType.optional(), values: z.array(z.string()).nullable().optional()});

export const wafValueKind = z.enum(["Text", "Number", "Regex", "IPMatch"]);

export const wafValueConstraint = z.object({kind: wafValueKind.optional(), pattern: z.string().nullable().optional(), maxLength: z.number().int().optional(), chainedMaxLength: z.number().int().optional(), example: z.string().nullable().optional(), message: z.string().nullable().optional()});

export const wafMappedEnum = z.object({optionalInput: z.boolean().nullable().optional(), isPremium: z.boolean().optional(), name: z.string().nullable().optional(), value: z.number().int().optional(), supportedValues: wafSupportedValues.optional(), recommendedOperator: wafRecommendedOperator.optional(), valueConstraint: wafValueConstraint.optional()});

export const wafMappedEnumList = z.object({enumName: z.string().nullable().optional(), enumValues: z.array(wafMappedEnum).nullable().optional()});

export const getWafEnumsResponse = z.object({data: z.array(wafMappedEnumList).nullable().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
};

/**
 * Retrieve all available WAF enum mappings
 * 
 * GET /shield/waf/enums
 */
export const getApiShieldWafEnums = async (options?: GetApiShieldWafEnumsOptions) => {
const {baseUrl = "https://api.bunny.net", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/shield/waf/enums${query.size > 0 ? `?${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(getWafEnumsResponse, await res.json())
};