import {z} from 'zod'

export type StringFilter = {eq?: string | undefined, ne?: string | undefined, in?: string | undefined, nin?: string | undefined, between?: string | undefined, contains?: string | undefined, starts?: string | undefined, ends?: string | undefined};

export type GetApiRegionsArgs = {'filter[available]'?: StringFilter | undefined, 'filter[private]'?: StringFilter | undefined, 'filter[zone]'?: StringFilter | undefined, 'page[size]'?: number | undefined, 'page[before]'?: string | undefined, 'page[after]'?: string | undefined, sort?: string | undefined};

export type GetApiRegionsOptions = {baseUrl?: string | undefined, OAuth2?: string | undefined, fetch?: typeof fetch | undefined};

export const region = z.object({id: z.string().optional(), label: z.string().optional(), zone: z.string().optional(), selection_label: z.string().optional(), project_label: z.string().optional(), timezone: z.string().optional(), available: z.boolean().optional(), private: z.boolean().optional(), endpoint: z.string().optional(), provider: z.object({name: z.string().optional(), logo: z.string().optional()}).optional(), datacenter: z.object({name: z.string().optional(), label: z.string().optional(), location: z.string().optional()}).optional(), environmental_impact: z.object({zone: z.string().optional(), carbon_intensity: z.string().optional(), green: z.boolean().optional()}).optional()});

export const link = z.object({href: z.string().optional()});

export const listLinks = z.object({self: link.optional(), previous: link.optional(), next: link.optional()});

export const getApiRegionsResponse = z.object({regions: z.array(region).optional(), _links: listLinks.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 regions
 * 
 * GET /regions
 */
export const getApiRegions = async (args: GetApiRegionsArgs, options?: GetApiRegionsOptions) => {
const {baseUrl = "https://api.upsun.com", fetch: fetchFn = fetch, OAuth2} = options ?? {}

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

if (args['filter[available]'] != null) query.append("filter[available]", JSON.stringify(args['filter[available]']))
if (args['filter[private]'] != null) query.append("filter[private]", JSON.stringify(args['filter[private]']))
if (args['filter[zone]'] != null) query.append("filter[zone]", JSON.stringify(args['filter[zone]']))
if (args['page[size]'] != null) query.append("page[size]", String(args['page[size]']))
if (args['page[before]'] != null) query.append("page[before]", String(args['page[before]']))
if (args['page[after]'] != null) query.append("page[after]", String(args['page[after]']))
if (args.sort != null) query.append("sort", String(args.sort))
if (OAuth2 !== undefined) headers.set('authorization', `Bearer ${OAuth2}`)

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