import {z} from 'zod'

export type StackDeploymentProvider = 'aws' | 'gcp' | 'azure';

export type GetApiApiV1StackDeploymentInfoArgs = {provider: StackDeploymentProvider};

export type GetApiApiV1StackDeploymentInfoOptions = {baseUrl: string, CookieOAuth2TokenBearer?: string | undefined, fetch?: typeof fetch | undefined};

export const stackDeploymentProvider = z.enum(["aws", "gcp", "azure"]);

export const stackDeploymentInfo = z.object({provider: stackDeploymentProvider, description: z.string(), instructions: z.string(), post_deploy_instructions: z.string(), integrations: z.array(z.string()), permissions: z.record(z.string(), z.array(z.string())), locations: z.record(z.string(), z.string()), skypilot_default_regions: z.record(z.string(), 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
};

/**
 * Get Stack Deployment Info
 * 
 * GET /api/v1/stack-deployment/info
 */
export const getApiApiV1StackDeploymentInfo = async (args: GetApiApiV1StackDeploymentInfoArgs, options: GetApiApiV1StackDeploymentInfoOptions) => {
const {baseUrl, fetch: fetchFn = fetch, CookieOAuth2TokenBearer} = options ?? {}

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

if (args.provider != null) query.append("provider", String(args.provider))
if (CookieOAuth2TokenBearer !== undefined) headers.set('authorization', `Bearer ${CookieOAuth2TokenBearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/stack-deployment/info${query.size > 0 ? `?${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(stackDeploymentInfo, await res.json())
};