import {z} from 'zod'

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

export const labels = z.record(z.string(), z.string());

export const iamServicePolicyRule = z.object({action: z.enum(["allow", "deny"]).optional(), expression: z.string().optional(), resources: z.array(z.string()).optional()});

export const iamAssumeRolePolicy = z.object({rules: z.array(iamServicePolicyRule).optional()});

export const iamServicePolicy = z.object({type: z.enum(["rules", "allow", "deny"]).optional(), rules: z.array(iamServicePolicyRule).optional()});

export const iamPolicy = z.object({"default-service-strategy": z.enum(["allow", "deny"]), services: z.record(z.string(), iamServicePolicy)});

export const iamRole = z.object({description: z.string().min(1).max(255).optional(), labels: labels.optional(), permissions: z.array(z.enum(["bypass-governance-retention", "reset-iam-organization-policy"])).optional(), "assume-role-policy": iamAssumeRolePolicy.optional(), editable: z.boolean().optional(), name: z.string().min(1).max(255).optional(), "max-session-ttl": z.number().int().gt(0).optional(), policy: iamPolicy.optional(), id: z.string().optional()});

export const user = z.object({sso: z.boolean().optional(), "two-factor-authentication": z.boolean().optional(), email: z.string(), id: z.string().optional(), role: iamRole, pending: z.boolean().optional()});

export const getApiUserResponse = z.object({users: z.array(user).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
};

/**
 * List Users
 * 
 * GET /user
 */
export const getApiUser = async (options?: GetApiUserOptions) => {
const {baseUrl = "https://api-ch-gva-2.exoscale.com/v2", fetch: fetchFn = fetch} = options ?? {}

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

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