import {z} from 'zod'

export type GetApiServiceOwnerUsernameReposRepoNameFlagsArgs = {owner_username: string, page?: number | undefined, page_size?: number | undefined, repo_name: string, service: 'bitbucket' | 'bitbucket_server' | 'github' | 'github_enterprise' | 'gitlab' | 'gitlab_enterprise'};

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

export const flag = z.object({flag_name: z.string(), coverage: z.number()});

export const paginatedFlagList = z.object({count: z.number().int(), next: z.string().nullable().optional(), previous: z.string().nullable().optional(), results: z.array(flag)});

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
};

/**
 * Flag list
 * 
 * GET /{service}/{owner_username}/repos/{repo_name}/flags/
 */
export const getApiServiceOwnerUsernameReposRepoNameFlags = async (args: GetApiServiceOwnerUsernameReposRepoNameFlagsArgs, options?: GetApiServiceOwnerUsernameReposRepoNameFlagsOptions) => {
const {baseUrl = "https://api.codecov.io/api/v2", fetch: fetchFn = fetch, tokenAuth} = options ?? {}

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

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

const url = `${baseUrl.replace(/\/+$/, '')}/${encodeURIComponent(String(args.service))}/${encodeURIComponent(String(args.owner_username))}/repos/${encodeURIComponent(String(args.repo_name))}/flags/${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(paginatedFlagList, await res.json())
};