import {z} from 'zod'

export type AppModelsCoreTierBaseTierType = 'free' | 'entry' | 'entry+' | 'enhanced' | 'premium' | 'professional' | 'business' | 'ultra' | 'enterprise' | 'starter' | 'enterprise+' | 'advanced' | 'pro';

export type GetApiTiersDowngradeFeaturesLostArgs = {current_tier: AppModelsCoreTierBaseTierType, new_tier: AppModelsCoreTierBaseTierType};

export type GetApiTiersDowngradeFeaturesLostOptions = {baseUrl: string, OAuth2PasswordBearer?: string | undefined, fetch?: typeof fetch | undefined};

export const tierLostFeaturesResponse = z.object({features: z.array(z.string()), nr_of_team_members_affected: z.number().int(), total_members: z.number().int()});

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 Lost Features On Downgrade
 * 
 * GET /tiers/downgrade/features-lost
 */
export const getApiTiersDowngradeFeaturesLost = async (args: GetApiTiersDowngradeFeaturesLostArgs, options: GetApiTiersDowngradeFeaturesLostOptions) => {
const {baseUrl, fetch: fetchFn = fetch, OAuth2PasswordBearer} = options ?? {}

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

if (args.current_tier != null) query.append("current_tier", String(args.current_tier))
if (args.new_tier != null) query.append("new_tier", String(args.new_tier))
if (OAuth2PasswordBearer !== undefined) headers.set('authorization', `Bearer ${OAuth2PasswordBearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/tiers/downgrade/features-lost${query.size > 0 ? `?${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(tierLostFeaturesResponse, await res.json())
};